Keithley 2280 Series Reference Manual
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Keithley 2280 Series Reference Manual

Precision measurement
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Series 2280
Precision Measurement DC Power Supplies
Reference Manual
077085501 / February 2015
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
*P077085501*
077085501
A T ektr onix Company

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  • Page 1 Series 2280 Precision Measurement DC Power Supplies Reference Manual 077085501 / February 2015 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com *P077085501* 077085501 A T ektr onix Company...
  • Page 2 Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part, without the prior written approval of Keithley Instruments is strictly prohibited. All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments. Other brand names are trademarks or registered trademarks of their respective holders.

  • Page 4: Safety Precautions

    Keithley Instruments products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages.
  • Page 5 (note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.

  • Page 6: Table Of Contents

    GPIB communication ......................2-40 LAN communication ........................ 2-43 USB communications ......................2-55 How to install the Keithley I/O Layer ..................2-61 Set voltage and current limit................... 2-62 Constant voltage (CV) and constant current (CC) mode ............2-63 Select a measurement function ..................2-65 Select a specific measurement range ................
  • Page 7 Table of Contents Series 2280 Precision Measurement DC Power Supplies Reference Manual Overvoltage protection ......................2-67 Overcurrent protection ......................2-68 Overtemperature protection ....................2-69 Overprotection error ........................ 2-70 Maximum voltage limits ......................2-70 Saving setups ........................ 2-71 Save a user setup ........................2-72 Recall a user setup .........................
  • Page 8 Series 2280 Precision Measurement DC Power Supplies Reference Manual Table of Contents List operation ......................... 3-30 Configuring a list ........................3-31 Importing a list from an external USB flash drive ..............3-33 Exporting a list to an external USB flash drive ................ 3-34 Running a list ..........................
  • Page 9 Table of Contents Series 2280 Precision Measurement DC Power Supplies Reference Manual SCPI command formatting ......................6-2 Using the SCPI command reference ..................6-4 SCPI command reference ..................7-1 Common commands......................7-1 *CLS ............................7-2 *ESE ............................7-2 *ESR? ............................7-3 *IDN? ............................
  • Page 10 Series 2280 Precision Measurement DC Power Supplies Reference Manual Table of Contents :DISPlay:CLEar ........................7-43 :DISPlay:SCREen ........................7-43 :DISPlay:USER:TEXT[:DATA]....................7-44 INITiate subsystem ......................7-44 :INITiate[n]:CONTinuous ......................7-45 :INITiate[n][:IMMediate] ......................7-45 MMEMory subsystem ....................7-46 :MMEMory:LOAD:SETup ......................7-46 :MMEMory:SAVE:SETup ......................7-46 OUTPut subsystem .......................
  • Page 11 Table of Contents Series 2280 Precision Measurement DC Power Supplies Reference Manual :STATus:OPERation[:EVENt]?....................7-87 :STATus:OPERation:ENABle ....................7-87 :STATus:OPERation:INSTrument[:EVENt]? ................7-88 :STATus:OPERation:INSTrument:ENABle................7-88 :STATus:OPERation:INSTrument:ISUMmary[:EVENt]? ............7-89 :STATus:OPERation:INSTrument:ISUMmary:ENABle ............7-89 :STATus:OPERation:INSTrument:ISUMmary:CONDition? ............. 7-90 :STATus:PRESet ........................7-91 :STATus:QUEStionable[:EVENt]? ................... 7-91 :STATus:QUEStionable:ENABle ..................... 7-92 :STATus:QUEStionable:INSTrument[:EVENt]?...............
  • Page 12 Series 2280 Precision Measurement DC Power Supplies Reference Manual Table of Contents :TRIGger[:SEQuence[n]]:COUNt................... 7-123 :TRIGger[:SEQuence[n]]:SAMPle:COUNt ................7-124 :TRIGger[:SEQuence[n]]:SOURce ..................7-124 Troubleshooting guide ..................8-1 Introduction ........................8-1 Contacting support ......................8-1 What to do if the power supply does not turn on ............... 8-2 LAN troubleshooting suggestions..................
  • Page 13 Table of Contents Series 2280 Precision Measurement DC Power Supplies Reference Manual Check DC current readback accuracy (10 A and 1 A ranges) ..........B-20 Check DC current readback accuracy (100 mA and 10 mA ranges) ........B-22 Check DC current line regulation .................... B-24 Check DC current load regulation ...................
  • Page 14 Series 2280 Precision Measurement DC Power Supplies Reference Manual Table of Contents Output queue .......................... D-17 Error queue ..........................D-18 Serial polling and SRQ ....................D-18 Status model programming examples ................D-18 SRQ when reading buffer becomes full ................... D-18 SRQ when trigger model is finished ..................

  • Page 16: Introduction

    General ratings................. 1-5 Welcome Thank you for choosing a Keithley Instruments product. The Series 2280 Precision Measurement DC Power Supplies are high-sensitivity, low-noise, and programmable instruments that source low noise, stable voltage, and can monitor load currents over a wide dynamic range from amperes to nanoamperes.

  • Page 17: Cd-Rom Contents

    Series 2280 Precision Measurement DC Power Supplies Reference Manual CD-ROM contents The Series 2280 Product Information CD-ROM is shipped with each Series 2280 instrument. (Keithley Instruments part number 063-4507-00) The Series 2280 Product Information CD-ROM contains:  Quick Start Guide: Provides unpacking instructions, describes basic connections, reviews basic operation information, and provides a quick test procedure to ensure the instrument is operational.

  • Page 18: Key Features

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 1: Introduction Key features The Series 2280 has the following features:  High current resolution and sensitivity to measure a wide range of load currents  6 ½-digit measurement resolution to enable a wide range of measurements while on one current range ...

  • Page 19: Optional Accessories

    Section 1: Introduction Series 2280 Precision Measurement DC Power Supplies Reference Manual You will get one of the following quick start guides. Languages Part number English 071319000 Simplified Chinese 071326000 Traditional Chinese 071326100 French 071325400 Spanish 071325700 Italian 071325500 German 071325600 Japanese 071325800...

  • Page 20: Available Services

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 1: Introduction Available services Service Model Number 1 additional year of factory warranty beyond the 3-Year factory 2280S-32-6-EW warranty (total of 4 years) 2280S-60-3-EW 2 additional years of factory warranty beyond the 3-Year factory 2280S-32-6-5Y-EW warranty (total of 5 years) 2280S-60-3-5Y-EW...

  • Page 22: General Operation

    Section 2 General operation In this section: Front-panel overview ..............2-1 Rear-panel overview ..............2-3 Front-panel user interface ............2-4 Installing the system ............... 2-22 Test connections ..............2-33 Remote communication interfaces ......... 2-40 Set voltage and current limit ........... 2-62 Select a measurement function ..........
  • Page 23 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Returns the display to the home screen. HOME key Opens the main menu. Select the icons using the navigation MENU key control and pressing the ENTER key to open source, measure, views, trigger, and system screens.

  • Page 24: Rear-Panel Overview

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Illuminates when the instrument is controlled through a remote REMOTE LED interface. indicator Illuminates when the instrument is connected to a local area network LAN LED indicator (LAN).

  • Page 25: Front-Panel User Interface

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual A digital input/output port that detects and outputs digital signals. Digital I/O port he port provides six digital I/O lines. Each output is set high (+5 V) or low (0 V) and can read high or low logic levels.
  • Page 26 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Screen element Description System status and event indicators Located at the top of the home screen, these indicators provide information about the present state of the instrument. Some of the indicators open up a dialog box with more information or a settings menu when selected.
  • Page 27 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Instrument communication activity indicator The activity indicator is located to the right of the communication settings status indicator. When the instrument is communicating with a remote interface, the up and down arrows flash. Figure 5: Instrument communication activity indicator If a service request has been generated, SRQ is displayed to the right of the up and down arrows.
  • Page 28 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation List and recall settings indicator This indicator shows the specified list number or recall settings. Figure 7: List and recall settings indicator Error and event indicator Move the focus to the error and event indicator using navigation control and press the Enter key to see the present error and event messages.
  • Page 29 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual This indicator has a different appearance based on the type of event that has been logged. Icon Description A serious error has occurred. These major errors are: Over-protection error (overvoltage, overcurrent, or overtemperature ...
  • Page 30 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Setting Description V-Set Configure the voltage setting using the numerical keys, soft keys, and navigation control. I-Limit Configure the current setting using the numerical keys, soft keys, and navigation control.

  • Page 31: Menu Overview

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Soft key area 3 Soft key area 3 contains the settings shown in the following figure and table. To change the setting, press the soft key to open a setting window. After configuration, close the window by pressing the ENTER or EXIT key.
  • Page 32 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation The main menu is organized into five submenus, which are labeled in green across the top of the display. The icons in each column open interactive screens. Source menu The menus organized under Source in the main menu allow you to select, configure, and perform source and list operations from the Series 2280 front panel.
  • Page 33 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Source List menu This menu allows you to set up a source configuration list. Setting Description List Select a list from nonvolatile memory; import a list from an external USB flash drive;...
  • Page 34 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Measure Rel/Filter menu This menu contains settings that specify the way measurement information is returned. Setting Description Rel State Use the relative offset feature to subtract a set value or a baseline reading from measurement readings.
  • Page 35 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Measure Data Buffers menu From this screen you can save, resize, and clear buffers. You also can set buffer fill mode and statistics functions. Setting Description Size Set the maximum number of readings the buffer can store (2 to 2,500).
  • Page 36 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Views Graph menu Selecting the Graph menu opens a screen that allows you set up and see the measurements in a graphical format. Setting Description Graph View the readings in a graphical representation. Statistics Turn the statistics function on or off.
  • Page 37 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Views Data menu <CT2280_only_start_SHOW>This menu allows you to view data in the selected reading buffer. Setting Description Data Sheet Show the data in the reading buffer. Statistics Turn on or off the statistics function.
  • Page 38 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Trigger Digital In/Out menu This menu allows you to configure the mode for each digital I/O line. The Series 2280 has 6 digital I/O lines (line 1 to line 6). For details, refer to Digital I/O (on page 3-16).

  • Page 39: System Menu

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Level Trigger menu This menu allows you to configure a triggering condition to start to log the data in the data buffer during the test. You can set the triggering point according to the voltage or current, and the triggering condition is based on whether the current or voltage rises or falls.
  • Page 40 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation System Save/Recall menu This menu allows you to save the present settings and any source or measure configuration lists to internal memory or external USB flash drive. You can also run a setup from internal memory or USB flash drive.
  • Page 41 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual There are no settings for the USB interface. Other system settings Setting Description Turn the instrument key-click sound on or off from this menu. Key Click You can set the front-panel display to dim after a period of time, or you Backlight Timer can set it so that it will never dim.

  • Page 42: Adjusting The Backlight Brightness And Timer

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation System Information menu The System Information menu shows the serial number, firmware version, and the calibration adjust date and count. It also allows you to upgrade the firmware and calibrate the instrument. When you select Demo mode, you can choose List Mode or Pulse.

  • Page 43: Installing The System

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Installing the system This section contains information on how to install your Series 2280 power supply. Handle and bumpers The Series 2280 has a handle and front and rear bumpers for using the instrument on a benchtop. The handle rotates so that you can swing it below the bottom surface of the instrument to tilt the instrument up for easier front-panel viewing, or to carry the instrument from one location to another.
  • Page 44 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Figure 14: Removing the handle 2. Using a Phillips screwdriver, loosen and remove the two screws holding the handle-mount assembly to one side of the Series 2280. The handle-mount assembly will fall away from the instrument chassis when the screws are removed.
  • Page 45 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Carrying or lifting the instrument If you move the power supply, refer to the following correct methods. Figure 16: Carry the instrument without handle Figure 17: Lift the instrument with handle 2-24 077085501 / February 2015...
  • Page 46 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Do not carry or maneuver instrument from side portion of the handle. The following operations may damage the handle and instrument. Do not lift the instrument while the handle is below the bottom surface. Figure 18: Wrong operation 1 Do not pull the instrument from the front panel while the instrument is standing on the handle.
  • Page 47 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Do not push the instrument from the rear panel while the instrument is standing on the handle. Figure 20: Wrong operation 3 Do not press the front bumper while the instrument is standing on the handle. Figure 21: Wrong operation 4 2-26 077085501 / February 2015...

  • Page 48: Dimensions

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Do not rotate the instrument while the instrument is standing on the handle. Figure 22: Wrong operation 5 Dimensions The following figures show the mounting screw locations and the dimensions of the instrument with and without the handle and bumpers.
  • Page 49 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual The following figures show the dimensions when the handle and bumpers are installed. Figure 24: Series 2280 front and rear panel dimensions with handle and bumpers 2-28 077085501 / February 2015...
  • Page 50 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Figure 25: Series 2280 top and side dimensions with handle and bumpers 077085501 / February 2015 2-29...
  • Page 51 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual The following figures show the dimensions when the handle and bumpers have been removed. Figure 26: Series 2280 front and rear panel dimensions with handle and bumpers removed 2-30 077085501 / February 2015...

  • Page 52: Power The Instrument On And Off

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Figure 27: Series 2280 top and side dimensions with handle and bumpers removed Power the instrument on and off Follow the procedure below to connect the Series 2280 to line power and turn on the instrument. The Series 2280 operates on four ranges: 100 V, 120 V, 220 V and 240 V at a frequency of 50 Hz or 60 Hz.
  • Page 53 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Operating the instrument on an incorrect line voltage may cause damage to the instrument, possibly voiding the warranty. Figure 28: Series 2280 rear panel To connect the power cord: 1.

  • Page 54: Test Connections

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Turning the Series 2280 output off Turning the Series 2280 output off does not place the instrument in a safe state. Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to the Series 2280 while the instrument is powered on.

  • Page 55: Front-Panel Connector

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Hazardous voltages may be present on all output and guard terminals. To prevent electrical shock that could cause injury or death, never make or break connections to the Series 2280 while output is on.

  • Page 56: Rear-Panel Output Mating Connector

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Figure 30: Safety test lead connection  Insert the wires into the hole as shown in location 2, and fasten the wires by hand-tightening the binding posts. The wire size should be from American wire gage (AWG) 20 to AWG 12. The wire must be heavy enough not to overheat while carrying the short-circuit output current of the unit.

  • Page 57: Two-Wire Local Sense Connection

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Two-wire local sense connection Four-wire sense connection Using four-wire remote sensing connections ensures that the programmed voltage is applied to the load and compensates for the voltage drop in the leads between the power supply and the load. The maximum voltage drop is 1 V/lead.

  • Page 58: Open Leads Detection

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Figure 32: Four-wire connection with twisted-pair wires Make sure you make the connections correctly. Incorrect connection between output and sense terminals will result in a serious error and may damage the device under test (DUT). For more information, see Open leads detection (on page 2-37) and...
  • Page 59 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual The following sections show several test examples when open leads occur. 1. Connect a 300  resistor to the rear-panel mating connector. For details, refer to Four-wire sense connections.

  • Page 60: Reverse Sense Leads

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Reverse sense leads When the following connections occur, the instrument generates a reversed sense leads error.  Sense HI is connected to Output LO  Sense HI is connected to Sense LO ...

  • Page 61: Remote Communication Interfaces

    Install the GPIB driver software Check the documentation for your GPIB controller for information about where to acquire drivers. Keithley Instruments also recommends that you check the vendor's website for the latest version of drivers or software. It is important that you install the drivers before you connect the hardware to prevent associating the incorrect driver with the hardware.
  • Page 62 To avoid possible mechanical damage, stack no more than three connectors on any one instrument. To minimize interference caused by electromagnetic radiation, use only shielded GPIB cables. Contact Keithley Instruments for shielded cables. Figure 37: IEEE-488 connections example 077085501 / February 2015...

  • Page 63: Set The Gpib Address

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual To connect the instrument to the GPIB: 1. Align the cable connector with the connector on the Series 2280 rear panel. The location of the connector is shown in the following figure. 2.

  • Page 64: Lan Communication

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation LAN communication The Series 2280 includes one Model CA-180-3A cable (LAN crossover cable for LAN communication). However, you can use any standard LAN crossover cable (RJ-45, male-to-male) or straight-through cable to connect your equipment.
  • Page 65 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual One-to-many connection With a LAN hub, a single network interface card can be connected to as many instruments as the hub can support. This requires straight-through network (not crossover) cables for hub connections. The advantage of this method is easy expansion of measurement channels when the test requirements exceed the capacity of a single instrument.
  • Page 66 Figure 43: Instrumentation connection to enterprise routers or servers Raw socket connection All Keithley instruments with LAN connections support raw socket communication. This means that you can connect your computer to the TCP/IP port on the instrument and send and receive commands.
  • Page 67 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Set up automatic LAN configuration If you are connecting to a LAN that has a DHCP server or if you have a direct connection between the instrument and a host computer, you can use automatic IP address selection. If you select Auto, the instrument attempts to get an IP address from a DHCP server.
  • Page 68 2. From the Microsoft Windows Start menu, select Keithley Instruments. 3. Select LXI Discovery Browser. 4. Click LXI Discovery Browser. The Keithley LXI Discovery Browser window is displayed. The LXI Discovery Browser displays the instruments that it finds on the network and their associated IP addresses.
  • Page 69 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual LAN status LEDs The figure below illustrates the two status light emitting diodes (LEDs) that are located at the bottom of the LAN port of the instrument. The table below the figure provides explanations of the LED states. Figure 44: LAN status LEDs 1 When lit, indicates that the LAN port is connected to a 100 Mbps network.
  • Page 70 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation The welcome page of the web interface gives you basic information about the instrument, including:  The instrument model, manufacturer, serial number, firmware revision, and the last LXI message ...
  • Page 71 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual 4. Change the values. 5. Click Submit. The instrument reconfigures its settings, which may take a few seconds. You may lose your connection with the web interface after clicking Submit. This is normal and does not indicate an error or failure of the operation.
  • Page 72 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation If a dialog box is displayed, type in the password to continue. The default password is admin. 2. In the left upper corner of the front panel, click Snapshot. A dialog box will be displayed, indicating that the front-panel snapshot is copied to the clipboard.
  • Page 73 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual For more information about using the virtual front panel, refer to Front-panel user interface (on page 2-4). The Series 2280 only allows fewer than three clients to open the virtual front panel web page at the same time.
  • Page 74 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation If you enter batch commands in the command box and click Auto, you will run the batch commands automatically, one-by-one. Click Stop to stop the automatic run of the batch commands. If you click Step, you will run the batch commands manually, one-by-one.
  • Page 75 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual There are three ways to log data on the web page:  There is a STOP MODE box in the upper right corner of the screen. If you choose Manual, you start and stop the data logging manually.

  • Page 76: Usb Communications

    USB communications To use the rear-panel USB port, you must have the Virtual Instrument Software Architecture (VISA) layer on the host computer. See How to install the Keithley I/O Layer (on page 2-61) for more information. VISA contains a USB-class driver for the USB Test and Measurement Class (USBTMC) protocol that, ®...
  • Page 77 INSTR: Use the USBTMC protocol To determine these parameters, you can run the Keithley Configuration Panel, which automatically detects all instruments connected to the computer. If you installed the Keithley I/O Layer, you can access the Keithley Configuration Panel through the ® ®...
  • Page 78 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation To use the Keithley Configuration Panel to determine the VISA resource string: 1. Click Start > Programs > Keithley Instruments > Keithley Configuration Panel. The Select Operation dialog box is displayed. 2. Select Add.
  • Page 79 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 53: Select Communication Bus dialog box 4. Select USB. 5. Click Next. The Select Instrument Driver dialog box is displayed. Figure 54: Select Instrument Driver dialog box 2-58 077085501 / February 2015...
  • Page 80 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation 6. Select Auto-detect Instrument Driver - Model. 7. Click Next. The Configure USB Instrument dialog box is displayed with the detected instrument VISA resource string visible. 8. Click Next. The Name Virtual Instrument dialog box is displayed. Figure 55: Name Virtual Instrument dialog box 9.
  • Page 81 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual 13. In the Keithley Communicator, select File > Open Instrument to open the instrument you just named. Figure 56: Keithley Communicator Open an Instrument 14. Click OK.

  • Page 82: How To Install The Keithley I/O Layer

    Section 2: General operation How to install the Keithley I/O Layer You can install the Keithley I/O Layer from the CD-ROM that came with your instrument, or from the download from the Keithley website. The software installs the following components: ...

  • Page 83: Set Voltage And Current Limit

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Set voltage and current limit Before you source voltage and current, you should specify a voltage and current limit. To configure the limit using the front-panel Home screen: 1.

  • Page 84: Constant Voltage (Cv) And Constant Current (Cc) Mode

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Constant voltage (CV) and constant current (CC) mode The Series 2280 power supplies feature a constant voltage/constant current automatic crossover. This feature permits continuous operation in the transition from constant-voltage mode to constant-current mode as the load changes.
  • Page 85 Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 58: Constant voltage mode Crossover from the constant-voltage mode to the constant-current mode also occurs automatically in response to a decrease in load. For example, connect a 5  resistor to the bonding posts on the front panel, set the voltage to 25 V and current limit to 1.0 A, and turn on the output.

  • Page 86: Select A Measurement Function

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Select a measurement function The Series 2280 allows you to perform the following measurement functions. Measurement functions What the instrument measures Concurrent (V + I) Measure voltage and current at the same time Voltage (V) Only measure voltage Current (I)

  • Page 87: Selecting A Specific Measurement Range

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Selecting a specific measurement range You need to set the measurement function before you can set the measurement range. If you set the measurement range to a specific value, measurement autoranging is disabled. To ensure the best accuracy and resolution when selecting a measurement range, use the lowest range possible that does not cause an overflow error.

  • Page 88: Protection

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation To select measurement autoranging using the front panel home screen: 1. Press the HOME key. 2. Press the soft key under Range. The Range dialog box is displayed. 3.

  • Page 89: Overcurrent Protection

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Even with the overvoltage protection set to the lowest value, never touch anything connected to the terminals of the Series 2280 when the output is on. Always assume that a hazardous voltage (greater than 30 V RMS) is present when the output is on.

  • Page 90: Overtemperature Protection

    When you return power to the instrument, verify that the cooling fan is running. If not, contact Keithley Instruments. Leaving the instrument turned on with the failure message displayed or with an inoperative cooling fan may result in damage to the instrument.

  • Page 91: Overprotection Error

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Overprotection error When an overcurrent, overvoltage, or overtemperature protection error occurs, the instrument performs the following action:  An overprotection error message is generated.  An error dialog box is displayed on the screen. ...

  • Page 92: Saving Setups

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Setting maximum voltage limits To set the maximum voltage limit using the front panel: 1. Press the MENU key. 2. Under Source, select Protect. 3. Select VMax and set the limit. 4.

  • Page 93: Save A User Setup

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Save a user setup You can save a user setup to internal nonvolatile memory or an external USB flash drive. To save a user setup to internal nonvolatile memory using the front panel: 1.

  • Page 94: Recall A User Setup

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation Recall a user setup You can recall setups from internal nonvolatile memory or external USB flash drive. When you recall a setup, the instrument returns to the settings that are saved in memory. To recall a saved setup from internal nonvolatile using the front panel: 1.

  • Page 95: Using The Event Log

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Using the event log The event log records errors that are reported by the instrument. The event log can hold up to 64 errors. When more than 64 errors are in the event log, the oldest error is removed when a new event is received.

  • Page 96: System Information

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 2: General operation System information To view system information from the front panel: 1. Press the MENU key. 2. Under System, select Information. The system information displays. To return to the Home page, press the HOME key. To view system information using SCPI commands: To retrieve the manufacturer, model number, serial number, and firmware version, send the command:...

  • Page 97: Resets

    Section 2: General operation Series 2280 Precision Measurement DC Power Supplies Reference Manual Resets There are several types of resets in the Series 2280. In general, the terms "reset," "instrument reset," and "system reset" refer to the reset that is performed when you send the *RST or :SYSTem:PRESet command, or when you select MENU >...

  • Page 98: Functions And Features

    Section 3 Functions and features In this section: Instrument access ..............3-1 Graph ..................3-2 Output delay, slew rate, and source delay........ 3-5 Reading buffer ................3-7 Digital I/O................3-16 Trigger model ................. 3-21 Level trigger................3-26 List operation ................3-30 Sink operation ................

  • Page 99: Changing The Password

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Changing the password If the instrument is set to the access mode of All, you must enter a password to change to a new control interface. You can set the password, as described below. The default password is admin.

  • Page 100: Changing The Window Position And Zoom

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Changing the window position and zoom You can use window position and zoom to specify how the readings are displayed on the screen. Use window position to set the center point of graph. Use window zoom to specify the number of readings that can be displayed.

  • Page 101: Adjusting The Scale And Offset Of Y-Axis

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Adjusting the scale and offset of Y-Axis You can adjust the scale and offset of Y-Axis automatically or manually. When auto adjustment is enabled, the instrument automatically changes the scale and offset of Y-Axis according to current and voltage measurements.

  • Page 102: Output Delay, Slew Rate, And Source Delay

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Before configuring the scale or offset, make sure the auto adjustment is disabled. Otherwise, you cannot change these settings. Output delay, slew rate, and source delay The following delays occur when you turn on the output and source a specified voltage and current to device under test (DUT): ...

  • Page 103: Slew Rate

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Slew rate The slew rate determines the rate at which the voltage changes to a new programmed setting. You can specify the rising rate and falling rate for the voltage changes. Using the front panel: 1.

  • Page 104: Reading Buffer

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Setting the source delay Using the front panel: 1. Press the MENU key. 2. Under Source, select Delay. 3. Select the button next to Source Delay and enter a value 4.

  • Page 105: Setting Reading Buffer Size And Buffer Mode

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 64: Buffer indicator Setting reading buffer size and buffer mode To configure the buffer, you need to make the following settings:  Setting the buffer size ...

  • Page 106: Viewing And Saving Buffer Content

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features The following topics provide information about using the front panel to configure buffer and provide an introduction to using remote commands to configure buffer. For additional information about using remote commands for buffer operations, see TRACe subsystem (on page 7-109).
  • Page 107 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 65: Example of spreadsheet with reading buffer content The following table describes the information that is stored in each column of the spreadsheet. Heading Description Index Provides an identifier for each reading.
  • Page 108 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features The current and voltage values in the buffer are different for measurement function. Measurement function Current Voltage Concurrent (V + I) Measured value for each Measured value for each voltage current reading reading Voltage (V)

  • Page 109: Configuring The Statistics Applied To Data In The Buffer

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Using the front panel to save buffer content to files Using the front panel to save or append buffer content to files: 1. Insert a USB drive into the USB port. 2.
  • Page 110 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Specifying the statistics applied to the data in the buffer Using the front panel: 1. Press the MENU key. 2. Under Measure, select Data Buffers. 3. Select the Statistics button. The Statistics window is displayed. 4.
  • Page 111 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Specifying the data in the buffer to perform with statistics You need to select either the voltage or current value in the buffer to perform statistics calculations. When you configure these settings, it will influence the Graph and Data Sheet screen.

  • Page 112: Clearing Buffer

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Format the statistical results You can specify the returned data elements for statistical calculations. The elements include value, reading number, unit, and time. You can specify one or more parameters. This only applies to minimum and maximum calculations.

  • Page 113: Automatically Clearing Buffer

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Automatically clearing buffer You can enable the autoclear function for the buffer. With autoclear enabled, the buffer will automatically clear when the storage process starts. Using the front panel: 1.
  • Page 114 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Series 2280 digital I/O port pinouts Description I/O line 1 I/O line 2 I/O line 3 I/O line 4 Vext line (relay flyback diode protection) I/O line 5 +5 V line I/O line 6 Ground...
  • Page 115 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Digital I/O lines The following table describes the possible pin configurations for the digital line modes. Lin mode Available configurable lines Trigger in Line 1 Meter complete output Line 2 Fault output Line 3...

  • Page 116: Configuring Digital I/O Lines

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features For example, if you configure line 4 as the digital output line, you can send the following command to sink relay current: :DIG:LINE4:FUNC:MOUTL To halt relay current, sent the following command :DIG:LINE4:FUNC:MOUTH Figure 70: Digital I/O Vext (example external circuit) +5 V line...
  • Page 117 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Using the front panel to configure digital I/O lines Using the front panel to configure digital I/O lines: 1. Press the MENU key. 2. Under Trigger, select Digital In/Out. 3.

  • Page 118: Trigger Model

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Line mode Description When applied each line with AUTO mode, it represents: AUTO Line 1: Trigger in  Line 2: Meter complete output  Line 3: Fault output ...
  • Page 119 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 71: Trigger model 3-22 077085501 / February 2015...

  • Page 120: Idle And Initiate

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Idle and initiate The instrument is in idle when it is not operating in the Arm layer or Trigger layer of the trigger model. While in the idle state, the instrument cannot perform any measurements. You can send the following commands to initiate the trigger model: ...

  • Page 121: Counter

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Counter Programmable counters are used to repeat operations within the trigger model layers. For example, if performing a 10-point list, the trigger counter would be set to 10, and measure counter to 1. Operation will stay in the Trigger Layer until the 10 source-delay-measure points of the list are performed.
  • Page 122 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features To set up trigger model from front panel: 1. Press the Menu Key. 2. Under Trigger, highlight the Configure icon and press ENTER. The trigger configure screen is displayed.

  • Page 123: Level Trigger

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual SCPI command Description :ARM[:SEQuence[n]]:COUNt (on page Set the number of times to repeat the arm event. 7-18) :ARM[:SEQuence[n]]:SOURce (on page Select the control source for the arm layer. The available 7-18) control sources are: Immediate triggering...
  • Page 124 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features To configure a voltage level trigger, send the following SCPI commands: :TRACe[n]:TRIGger:VOLTage:STATe :TRACe[n]:TRIGger:VOLTage[:LEVel] :TRACe[n]:TRIGger:VOLTage:DIRection :TRACe[n]:TRIGger:OFFSet When the level trigger is activated, it clears the data in the buffer except the points specified by the Offset setting.

  • Page 125: Configuring A Current Level Trigger

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 74: Voltage level trigger (fall) Configuring a current level trigger To configure a current level trigger from the front panel: 1. Press the Menu key. 2.
  • Page 126 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features When the level trigger is activated, it clears the data in the buffer (except the points specified by the Offset setting). The following figure illustrates how the level trigger is activated when the current rises. Figure 75: Current level trigger (rise) The following figure illustrates how the level trigger is activated when the current falls.

  • Page 127: List Operation

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 76: Current level trigger (fall) List operation Lists allow you to set up the instrument to source specific voltage and current values to a device under test (DUT).

  • Page 128: Configuring A List

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Configuring a list To set up a list from the front panel, you select options from the Source List screen. To configure a list on the front panel 1.
  • Page 129 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual To configure a list using SCPI commands: To set up list 1 with 6 points listed in the following table, send these commands: :LIST1:CURR "1,1,1" :LIST1:VOLT "5,10,15" :LIST1:DWEL "2,2,2"...

  • Page 130: Importing A List From An External Usb Flash Drive

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Importing a list from an external USB flash drive If you have created or saved a list file (.csv file), you can import the list from external USB flash drive. See the following figure for an example of a list .csv file.

  • Page 131: Exporting A List To An External Usb Flash Drive

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Exporting a list to an external USB flash drive After you have configured the list, you can export the list to an external USB flash drive. To export a list to USB flash drive on the front panel: 1.
  • Page 132 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Source settings Setting Front panel operations SCPI commands MENU > Source Settings > V-Set V-Set [:SOURce[n]]:<function>[:LEVel][:IMMedi   ate][:AMPLitude] (on page 7-66) HOME > V-Set  I-Limit MENU >...
  • Page 133 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Measure settings Setting Front panel operations SCPI commands MENU > Measure Settings > Function Measurement :SENSe[n]:FUNCtion (on page   function 7-51) HOME > Measure  Range MENU >...
  • Page 134 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Trigger settings Setting Front panel operations SCPI commands MENU > Trigger Configure > List Trigger :TRIGger[:SEQuence[n]]:SOURce   Type page 7-124) MENU > Trigger Configure > Idle :TRIGger[:SEQuence[n]]:COUNt ...
  • Page 135 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Front-panel list options Option Description Specify the list you want to execute. The list number is from 1 to 9. The default setting Number for list number is Demo. You can run a predefined list. For details, see System Information menu (on page 2-21).
  • Page 136 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features List running time Depending on the Hold Time you select in the front-panel list options, there are two types of device actions during list running: Figure 79: Device action in time mode For list running time in Time mode: Measurement time = Dwell - Source Delay Sample Count = Measurement Time / Sample Speed...
  • Page 137 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual For list running time in Point mode: Measurement Time = Sample Count * Sample Speed The set dwell time is ignored. Step mode triggering For step mode, after each list steps, the instrument generates a measure complete signal. You can detect this signal in digital I/O line 2.
  • Page 138 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features As shown in the figure above, the device action can be any mode described in List running time page 3-39). The measurement time is decided accordingly. The following figure explains the process of measurement for step mode: Figure 82: Step mode measurement time When using immediate triggering, the instrument runs the next list step after sending the measure...
  • Page 139 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Sweep mode triggering For sweep mode, after each list cycle, the instrument generates a measure complete signal. You can detect this signal in digital I/O line 2. For details, refer to Digital I/O (on page 3-16).

  • Page 140: Aborting A List

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features As shown in the figure above, the device action can be any mode described in List running time page 3-39). The measurement time is decided accordingly. The following figure explains the process of measurement for sweep mode: Figure 84: Sweep mode measurement time Increasing the speed of sweeps...

  • Page 141: Sink Operation

    Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Sink operation When the Series 2280 is operating as a sink, current has opposite polarities and the instrument is dissipating power rather than sourcing it. The instrument can be forced into sink operation by an external source, such as a battery, or an energy storage device, such as a capacitor.

  • Page 142: Default Value

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Default value Math and statistics reset values Setting Default value reset from Default value reset by the MENU > Manage > System command *RST (on page Reset or by the SCPI 7-6) command...
  • Page 143 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Calibration reset values Setting Default value reset from Default value reset by MENU > Manage > System the command *RST Reset or by the SCPI page 7-6) command :SYSTem:PRESet page 7-107)
  • Page 144 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Format reset values Setting Default value reset from Default value reset by MENU > Manage > System the command *RST Reset or by the SCPI page 7-6) command :SYSTem:PRESet page 7-107)
  • Page 145 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Measurement reset values Setting Default value reset from Default value reset by the MENU > Manage > System command *RST (on page Reset or by the SCPI 7-6) command :SYSTem:PRESet...
  • Page 146 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Source reset values Setting Default value reset from Default value reset by the MENU > Manage > command *RST (on page System Reset or by the 7-6) SCPI command :SYSTem:PRESet...
  • Page 147 Section 3: Functions and features Series 2280 Precision Measurement DC Power Supplies Reference Manual Status model reset values Setting Default value reset from Default value MENU > Manage > reset by the System Reset or by the command *RST SCPI command (on page 7-6) :SYSTem:PRESet page 7-107)
  • Page 148 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 3: Functions and features Buffer reset values Setting Default value reset from Default value reset by the MENU > Manage > System command *RST (on page Reset or by the SCPI 7-6) command :SYSTem:PRESet...

  • Page 150: Measurement Optimization

    Section 4 Measurement optimization In this section: Introduction ................4-1 Optimizing either measurement accuracy or speed ....4-1 Math calculations that you can apply to measurements ..4-10 Relative offset ................ 4-11 Displayed measurements ............4-13 Introduction This section contains information that will help you get more useful measurement data and better instrument performance.

  • Page 151: Resolution

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual Resolution You can specify a resolution to adjust the measurement accuracy and speed. Changing resolution will impact NPLC, autozero, display digits, and average filter. For details, see the following table. Autozero state/ Display Resolution NPLC...

  • Page 152: Nplc

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization Using SCPI commands: To set the resolution for the current function, send the commands: SENse:CURRent:RESolution <n> Where <n> is:  4: 4.5 digit resolution  5: 5.5 digit resolution ...

  • Page 153: Autozero Measurements

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual To set NPLCs using the front panel: 1. Select the measurement function. The NPLC will be applied to this function. For more information, you can refer to Select a measurement function (on page 2-65).

  • Page 154: Displayed Digits

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization For example, when autozero is enabled, making 100 readings in the concurrent function with 1 NPLC takes a total measurement time is (50 Hz power line frequency): Total time = 5 * reading number * NPLC *(1/50) = 5 * 100 *1 *(1/50) = 10 s When autozero is disabled, making 100 readings in concurrent function with 1 NPLC takes a total measurement time is (50 Hz power line frequency):...

  • Page 155: Filtering Measurement Data

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual Setting the displayed digits using the front panel From the front panel: 1. Select the measurement function. The display digits will be applied to this function. For more information, you can refer to Select a measurement function (on page 2-65).
  • Page 156 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization Moving average filter When the moving average filter is selected, the measurements are added to the stack continuously on a first-in, first-out basis. As each measurement is made, the oldest measurement is removed from the stack.
  • Page 157 Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual  Filter count: The filter count specifies the number of measurements to be made for each averaged measurement sample. It can be set from 2 to 100. ...
  • Page 158 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization Setting up the averaging filter Using the front panel: 1. Select the measurement function. The filter will be applied to this function. For more information, you can refer to Select a measurement function (on page 2-65).

  • Page 159: Math Calculations That You Can Apply To Measurements

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual Math calculations that you can apply to measurements The Series 2280 supports mx+b built-in math calculations. Math calculations are applied to the input signal after filter and relative offset operations are completed. For more details on the order of operations, see Displayed measurements (on page 4-13).

  • Page 160: Relative Offset

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization Once m, b, and units are set up, you can enable and disable the math operation from the home screen. On the home screen 2, press the Calculate soft key. The Calculate window is displayed. Press the Math soft key to enable or disable the math operation.

  • Page 161: Establishing A Relative Offset Value

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual Establishing a relative offset value You can use the Series 2280 to automatically determine the relative offset, or you can assign a specific relative offset value. Setting a relative offset value You can set a specific relative offset value using the front panel or the remote commands.

  • Page 162: Displayed Measurements

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization Automatically acquiring a relative offset value When you automatically acquire a relative offset value, the Series 2280 performs the following actions:  Makes a new measurement.  Stores the measurement as the new relative offset level.

  • Page 163: Select The Source Of Readings

    Section 4: Measurement optimization Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 88: Data flow Select the source of readings You can select the source of readings saved to the buffer using the front panel or SCPI commands. Using the front panel: 1.
  • Page 164 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 4: Measurement optimization The Reading option selects readings before any math calculation. For the CALC option, the result of the math calculation is stored in the buffer. Using SCPI commands: To select the source of readings before the math calculation, send the commands: :TRAC:FEED SENS To save the source of readings after the math calculation, send the commands:...

  • Page 166: Application Examples

    Section 5 Application examples In this section: Simple voltage output and current measurement ..... 5-1 Configure and execute a 10-step linear list sweep ....5-3 Perform a fast current load measurement ........ 5-6 Simple voltage output and current measurement This example demonstrates the steps to configure a voltage output and perform a precision voltage and current measurement using the default instrument configuration.

  • Page 167: Device Connections

    Section 5: Application examples Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 89: Series 2280 remote interface connections Device connections Connect the DUT (for this example, a 1 k resistor) to the output binding posts on the front panel. For details, refer to Two-wire local sense connection (on page 2-36).

  • Page 168: Configure And Execute A 10-Step Linear List Sweep

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 5: Application examples When the output is turned on, changing value with the navigation control can source voltage and current instantly. Make sure the output does not damage your device under test (DUT). 6.

  • Page 169: Set Up Remote Communications

    Section 5: Application examples Series 2280 Precision Measurement DC Power Supplies Reference Manual Set up remote communications You can run this application from the front panel or any of the supported communication interfaces for the instrument (GPIB, USB, or ethernet). The following figure shows the rear-panel connection locations for the remote communication interfaces.

  • Page 170: Execute A 10-Step Linear List Sweep

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 5: Application examples 8. Make the value 2 A and press ENTER. 9. Select the Dwell box in the point 1 row. Press ENTER. 10. Make the value 3 s and press ENTER. 11.

  • Page 171: Perform A Fast Current Load Measurement

    Section 5: Application examples Series 2280 Precision Measurement DC Power Supplies Reference Manual To view the measurements on the front panel: 1. Press the Exit key to close the List dialog box. 2. Press the View soft key under Graph to view a plot of the measurements. Figure 93: Graph view of 10-step linear list sweep To configure and execute a list sweep using SCPI commands: *RST...

  • Page 172: Equipment Required

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 5: Application examples Equipment required  One Series 2280 power supply  Dual-channel arbitrary function generator (Tektronix AFG3120C)  Oscilloscope  Resistors: 2.5  and 20   nMOSFET Set up remote communications You can run this application from the front panel or any of the supported communication interfaces for the instrument (GPIB, USB, or ethernet).

  • Page 173: Device Connections

    Section 5: Application examples Series 2280 Precision Measurement DC Power Supplies Reference Manual Device connections Use a Tektronix two-channel AFG (for example, AFG3102C or equivalent) to generate two synchronous pulse signals. One signal is used to control the on and off state of nMOSFET. The other is used as the external triggering signal of Series 2280.

  • Page 174: Measure The Fast Current Load Changes

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 5: Application examples Connect the digital I/O pin 1 and pin 9 with AFG output channel. For details on digital I/O, refer to Digital I/O (on page 3-16). Figure 96: Digital I/O connection Measure the fast current load changes To perform a fast current load measurement on the front panel: 1.
  • Page 175 Section 5: Application examples Series 2280 Precision Measurement DC Power Supplies Reference Manual Description I/O line 1 I/O line 2 I/O line 3 I/O line 4 Vext line (relay flyback diode protection) I/O line 5 +5 V line I/O line 6 Ground 1.
  • Page 176 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 5: Application examples When the resistive load is too large (for example, 32 M), the settling time for the source increases. As a result, the instrument perform a slow current measurements. The following graphic shows the Tektronix oscilloscope plot of the generator pulse output and the load current.

  • Page 178: Introduction To Scpi Commands

    Section 6 Introduction to SCPI commands In this section: Introduction to SCPI ..............6-1 SCPI command programming notes ........6-2 Introduction to SCPI The Standard Commands for Programmable Instruments (SCPI) standard is a syntax and set of commands that is used to control test and measurement devices. The following information describes some basic SCPI command information and how SCPI is used with the Series 2280 and presented in the Series 2280 documentation.

  • Page 179: Command Execution Rules

    Section 6: Introduction to SCPI commands Series 2280 Precision Measurement DC Power Supplies Reference Manual The colon (:) at the beginning of a command is optional. For example, the following commands are equivalent: :SENSe:CONCurrent:REFerence:STATe ON SENSe:CONCurrent:REFerence:STATe ON Command execution rules Command execution rules are as follows: ...
  • Page 180 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 6: Introduction to SCPI commands MINimum, MAXimum, and DEFault You can use MINimum, MAXimum, or DEFault instead of a parameter for some commands. For example, you can set <defaultParameter> for the command :SENSe:CONCurrent:NPLCycles <defaultParameter>...

  • Page 181: Using The Scpi Command Reference

    Section 6: Introduction to SCPI commands Series 2280 Precision Measurement DC Power Supplies Reference Manual Sending strings If you are sending a string, it must begin and end with matching quotes (either single quotes or double quotes). If you want to include a quote character as part of the string, type it twice with no characters in between.
  • Page 182 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 6: Introduction to SCPI commands Command name and summary table Each instrument command description starts with the command name, followed by a table with relevant information for each command. Definitions for the numbered items below are listed following the figure.

  • Page 183: Command Details

    Section 6: Introduction to SCPI commands Series 2280 Precision Measurement DC Power Supplies Reference Manual Command usage The Usage section of the remote command listing shows how to properly structure the command. Each line in the Usage section is a separate variation of the command usage; all possible command usage options are shown here.
  • Page 184 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 6: Introduction to SCPI commands 1. Example code that you can copy from this table and paste into your own application. Examples are generally shown using the short forms of the commands. 2.

  • Page 186: Common Commands

    Section 7 SCPI command reference In this section: Common commands ..............7-1 :ABORt[n] ................7-11 :CONFigure[n]:<function> ............7-11 :FETCh[n]? ................7-12 :FORMat:ELEMents ............... 7-13 :FORCe:TRIGger ..............7-15 :MEASure[n]:<function>? ............7-16 :READ[n]? ................7-17 ARM subsystem ..............7-17 CALCulate subsystem ............7-19 CALibration subsystem ............

  • Page 187: Cls

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual *CLS This command clears the event registers and error queues. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage *CLS Details Use *CLS to clear the event registers and queues.

  • Page 188: Esr

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details When a bit in the Standard Event Status Enable Register is set and the corresponding bit in the Standard Event Status Register is set on, the ESB bit of the Status Byte Register is set. To set a bit, send the constant or the value of the bit as the <n>...

  • Page 189: Idn

    Usage *IDN? Details The identification string includes the manufacturer, model number, serial number, and firmware revision of the instrument. The string is formatted as follows: KEITHLEY INSTRUMENTS INC.,MODEL nnnn,xxxxxxx,yyyyy Where:  nnnn is the model number  xxxxxxx is the serial number ...

  • Page 190: Lang

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference *LANG? This command determines which command set is used by the instrument. Type Affected by Where saved Default value Query only Not applicable Nonvolatile memory SCPI Usage *LANG? Details...

  • Page 191: Rst

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual *RST This command resets the instrument settings to their default values. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage *RST Details...

  • Page 192: Sre

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference *SRE This command sets and queries the bits of Status Request Enable Register. Type Affected by Where saved Default value Command and query Power cycle Not saved See Details Usage *SRE <n>...

  • Page 193: Stb

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual *STB? This command reads the contents of Status Byte Register. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage *STB? Details This command returns a decimal value that corresponds to the binary-weighted sum of all bits set in...

  • Page 194: Trg

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference *TRG This command generates a trigger event from a remote command interface. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage *TRG Details...

  • Page 195: Wai

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual *WAI This command postpones the execution of subsequent commands until all previous overlapped commands are finished. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage...

  • Page 196: Abort[N]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :ABORt[n] This command stops all trigger model commands on the instrument. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage :ABORt[n] Channel number: For single-channel instruments, the value is 1.

  • Page 197: Fetch[N]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Channel number: For single-channel instruments, the value is 1. The measurement function to which this setting applies: <function> Concurrent: CONCurrent[:DC]  Current: CURRent[:DC]  Voltage: VOLTage[:DC] ...

  • Page 198: Format:elements

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details This command requests the latest post-processed reading. This command does not trigger a measurement. It simply requests the last available reading. If you send this command more than once and there are no new readings, it will return the same value that was returned as the previous query.
  • Page 199 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details When specifying data elements, you can:  Specify buffer elements in any order.  Include up to 9 elements in a single list.  Repeat elements as long as the number of elements in the list is 9 or less. ...

  • Page 200: Force:trigger

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :FORCe:TRIGger This command bypasses the control source (Arm layer or Trigger layer) when you do not wish to wait for the programmed event to occur. Type Affected by Where saved Default value...

  • Page 201: Measure[N]:

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :MEASure[n]:<function>? This command makes a measurement and returns the reading. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :MEASure[n]:<function>? :MEASure[n]:<function>? <range>...

  • Page 202: Read[N]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Measure current on the10 A range with 5.5 digit display :MEAS:CURR? 10,5 resolution. Example output: 2.473375E-02A Also see :CONFigure[n]:<function> (on page 7-11) :READ[n]? (on page 7-17) :READ[n]? This query makes measurements and returns the first reading.

  • Page 203: Arm[:Sequence[N]]:Count

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :ARM[:SEQuence[n]]:COUNt This command sets the number of times to repeat the Arm event. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset Power cycle Usage...

  • Page 204: Calculate Subsystem

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Select bus triggering as the trigger source ARM:SOUR BUS for the arm layer. Also see :TRIGger[:SEQuence[n]]:SOURce (on page 7-124) Trigger model (on page 3-21) CALCulate subsystem The commands in this subsystem configure and control the math and statistic operations.

  • Page 205: Calculate[1]::Kmath:mbfactor

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Also see :CALCulate[1]:<function>:KMATh:MBFactor (on page 7-20) :CALCulate[1]:<function>:KMATh:MMFactor (on page 7-21) :CALCulate[1]:<function>:KMATh:MUNits (on page 7-22) :CALCulate[1]:<function>:STATe (on page 7-23) :CALCulate[1]:<function>:KMATh:MBFactor This command specifies the offset for the y = mx + b operation. Type Affected by Where saved...

  • Page 206: Calculate[1]::Kmath:mmfactor

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Also see :CALCulate[1]:<function>:FORMat (on page 7-19) :CALCulate[1]:<function>:KMATh:MMFactor (on page 7-21) :CALCulate[1]:<function>:KMATh:MUNits (on page 7-22) :CALCulate[1]:<function>:STATe (on page 7-23) :CALCulate[1]:<function>:KMATh:MMFactor This command specifies the scale factor for the y = mx + b math operation. Type Affected by Where saved...

  • Page 207: Calculate[1]::Kmath:munits

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Also see :CALCulate[1]:<function>:FORMat (on page 7-19) :CALCulate[1]:<function>:KMATh:MBFactor (on page 7-20) :CALCulate[1]:<function>:KMATh:MUNits (on page 7-22) :CALCulate[1]:<function>:STATe (on page 7-23) :CALCulate[1]:<function>:KMATh:MUNits This command specifies the units suffix name for the y = mx + b math operation. Type Affected by Where saved...
  • Page 208 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALCulate[1]:<function>:STATe This command enables or disables the math operations. Type Affected by Where saved Default value Command and query Recall settings Save settings 0 (OFF) Instrument reset Power cycle Usage :CALCulate[1]:<function>:STATe <state>[,<channel>]...

  • Page 209: Calculate2:Data

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :CALCulate2:DATA? This command reads the results of specified statistics. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :CALCulate2:DATA? :CALCulate2:DATA? <channel>...

  • Page 210: Calculate2:Format

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Before the calculation, start the trigger model to take 10 *RST readings. :TRAC:CLE :TRIG:COUN 10 The first CALC2:IMM? returns reading, units, timestamp :VOLT 6 and reading number for min and max: :OUTP ON 5.986128E+00V,06/25/2013 :INIT...
  • Page 211 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual You can specify the statistic formats in any order. However, when more than one statistic formats are selected, CALC2:IMM? and CALC2:DATA? always return the data in the following order: MIN, MAX, MEAN, PKPK, and SDEV.

  • Page 212: Calculate2:Format:elements

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALCulate2:FORMat:ELEMents This command specifies or queries data elements to be included in the data string. It only influences minimum and maximum query results. Type Affected by Where saved Default value Command and query...

  • Page 213: Calculate2:Function

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command affects the output of the following commands:  :CALCulate2:IMMediate?  :CALCulate2:DATA? You can specify one or more elements. <item list> is a string that must be enclosed in single or double quotes.

  • Page 214: Calculate2:Immediate

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details This command allows you to select specific data in the buffer to use with statistic operations. For example, if you select CURRent, the statistic operations only apply to current values. Sending the :CALCulate2:IMMediate? command only returns the statistic result of current value.
  • Page 215 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command only performs the selected statistic operations when the operations are enabled. It returns the data in the following order: MIN, MAX, MEAN, PKPK, SDEV. To query the operation state, send the command: :CALCulate2:STATe? When the statistics operations are disabled, sending this command will not perform the statistic...

  • Page 216: Calculate2:State

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALCulate2:STATe This command enables or disables the statistic calculations. Type Affected by Where saved Default value Command and query Recall settings Save settings 0 (OFF) Instrument reset Power cycle Usage :CALCulate2:STATe <state>...

  • Page 217: Calibration:protected:cancel

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :CALibration:PROTected:CANCel This command cancels the calibration procedures and drops the new constants. Affected by Where saved Default value Type Command only Not applicable Not applicable Not applicable Usage :CALibration:PROTected:CANCel Details...

  • Page 218: Calibration:protected:count

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALibration:PROTected:COUNt? This query command returns the number of times that the instrument has completed calibration. Type Affected by Where saved Default value Query only Not applicable Nonvolatile memory Not applicable Usage...

  • Page 219: Calibration:protected:date

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :CALibration:PROTected:DATE This command specifies the calibration date. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory Not applicable Usage :CALibration:PROTected:DATE <year>,<month>,<day> :CALibration:PROTected:DATE? Year;...

  • Page 220: Calibration:protected[:Dc[N]]:Step

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALibration:PROTected[:DC[n]]:STEP<step> This command performs the calibration procedures. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage :CALibration:PROTected[:DC[n]]:STEP1 :CALibration:PROTected[:DC[n]]:STEP2 :CALibration:PROTected[:DC[n]]:STEP3 :CALibration:PROTected[:DC[n]]:STEP4 :CALibration:PROTected[:DC[n]]:STEP5 :CALibration:PROTected[:DC[n]]:STEP6...
  • Page 221 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Example Enable the calibration mode. :CAL:PROT:STAT ON, 'KI002280' Start voltage DAC and ADC zero-calibration point. :CAL:PROT:STEP1 :CAL:PROT:STEP1:DATA 0.2996 Enter the voltage reading from the external DMM. Wait until step 1 finishes.

  • Page 222: Calibration:protected[:Dc[N]]:Step:Data

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :CALibration:PROTected:SAVE (on page 7-39) :CALibration:PROTected:STATe (on page 7-40) :CALibration:PROTected[:DC[n]]:STEP<step>:DATA This command enter the values for calibration calculations. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable...
  • Page 223 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command is used to set the voltage or resistance for calibration. Step 6 and step 8 do not need any external data entry. The instrument can collect the data for DAC calibration.

  • Page 224: Calibration:protected:save

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Wait for the instrument to collect data; you do not need to :CAL:PROT:STEP8:DATA enter any parameters. Wait until step 8 finishes. When finished, this command *OPC? returns 1.

  • Page 225: Calibration:protected:state

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :CALibration:PROTected:STATe This command enables or disables calibration procedures when performing these procedures over the remote interface. Type Affected by Where saved Default value Command and query Instrument reset Not saved 0 (OFF)

  • Page 226: Digital:line:Function

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :DIGital:LINE<n>:FUNCtion This command sets the digital I/O pin to be a digital line and sets the pin to be input or output. Type Affected by Where saved Default value Command and query Recall settings...

  • Page 227: Display Subsystem

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command queries the manual input digital I/O line. If the line is not assigned to manual input, querying the pin gets no return and the instrument generates an error 508, "Querying manual input data of the line which is not set as Manual Input line."...

  • Page 228: Display:clear

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :DISPlay:CLEar This command removes user-defined text messages from the OUTPUT view screen. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage :DISPlay:CLEar [<channel>] <channel>...

  • Page 229: Display:user:text[:Data]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :DISPlay:USER:TEXT[:DATA] This command defines the text that is displayed on the front-panel OUTPUT view screen. Type Affected by Where saved Default value Command only Power cycle Not applicable Not applicable Usage...

  • Page 230: Initiate[N]:Continuous

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :INITiate[n]:CONTinuous This command enables and disables continuous triggering. Type Affected by Where saved Default value Command and query Recall settings Save settings 1 (ON) Instrument reset Power cycle Usage :INITiate[n]:CONTinuous <state>...

  • Page 231: Mmemory Subsystem

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual MMEMory subsystem The commands in the MMEMory subsystem save or recall the setups to the external USB flash drive. :MMEMory:LOAD:SETup This command recalls the specified setup from the external USB flash drive to the instrument. Type Affected by Where saved...

  • Page 232: Output Subsystem

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Detail This command allows you to save the present instrument setup to the external USB flash drive. Make sure that the external USB flash drive is connected to the instrument before you send this command.

  • Page 233: Output:delay:rising

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command sets the falling delay so that output will not turn off until the delay has elapsed. This command affects on-to-off transitions, including the operation: :OUTPut:STATe ON Example Set the falling delay time to 1 s.

  • Page 234: Output:delay:state

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Also see :OUTPut:DELay:FALLing (on page 7-47) :OUTPut[:STATe] (on page 7-51) :OUTPut:DELay:STATe This command enables and disables the delay time that the instrument waits before enabling and disabling the specified output.

  • Page 235: Output:protection:tripped

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details Clears the protection status if an overvoltage, overcurrent, or overtemperature protection condition occurred or a reverse sense fault was detected. For all four faults, this command also clears the related Questionable Instrument Summary Condition Register bit.

  • Page 236: Output[:State]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :OUTPut[:STATe] This command enables or disables the source output. Type Affected by Where saved Default value Command and query Recall settings Save settings 0 (OFF) Instrument reset Power cycle Usage :OUTPut[:STATe] <state>...

  • Page 237: Sense[N]::Average:count

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Usage :SENSe[n]:FUNCtion <name> :SENSe[n]:FUNCtion? Channel number: For single-channel instruments, the value is 1. A string that contains the measurement function to make active: <name> Concurrent: "CONCurrent[:DC]" ...

  • Page 238: Sense[N]::Average[:State]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details The filter count is the number of readings that are acquired and stored in the filter stack for the averaging calculation. When the filter count is larger, more filtering is done and the data is less noisy. Example Set the average filter window as 0.1%.

  • Page 239: Sense[N]::Average:tcontrol

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SENSe[n]:<function>:AVERage:TCONtrol This command sets the type of averaging filter that is used for measurements for the selected function when the measurement filter is enabled. Type Affected by Where saved Default value Command and query...

  • Page 240: Sense[N]::Average:window

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SENSe[n]:<function>:AVERage:WINDow This command specifies a filter window to control filter threshold. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset Power cycle Usage :SENSe[n]:<function>:AVERage:WINDow <value>...

  • Page 241: Sense[N]::Digits

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SENSe[n]:<function>:DIGits This command determines the number of digits that are displayed for measurements on the front panel. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset...

  • Page 242: Sense[N]::Nplcycles

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SENSe[n]:<function>:NPLCycles This command sets the time that the input signal is measured for measurements of the selected function. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset...

  • Page 243: Sense[N]::Range

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SENSe[n]:<function>:RANGe This command sets the measurement range for measurements of the selected function. Type Affected by Where saved Default value Command and query Recall settings Save settings Concurrent: 10 mA Instrument reset Current: 10 mA...

  • Page 244: Sense[N]::Range:auto

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference When you select a fixed range, an overrange condition can occur. When you set a value for the measurement range, the measurement autorange setting is automatically disabled for the measurement function. When you read this setting, you see the measurement range that the instrument is presently using.

  • Page 245: Sense[N]::Reference

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command determines how the range is selected. When this command is set to off, you must set the range. If you do not set the range, the instrument remains at the range that was selected by autorange.

  • Page 246: Sense[N]::Reference:acquire

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Set the relative offset for current measurements to 1. SENS:CONC:REF 1 Also see :SENSe[n]:<function>:REFerence:ACQuire (on page 7-61) :SENSe[n]:<function>:REFerence:STATe (on page 7-62) :SENSe[n]:<function>:REFerence:ACQuire This command acquires a measurement and stores it as the relative offset value. Type Affected by Where saved...

  • Page 247: Sense[N]::Reference:state

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SENSe[n]:<function>:REFerence:STATe This command enables or disables a relative offset value. Type Affected by Where saved Default value Command and query Recall settings Save settings 0 (OFF) Instrument reset Power cycle Usage...

  • Page 248: Sense[N]::Resolution

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SENSe[n]:<function>:RESolution This command sets the measurement resolution for the selected measurement function. Type Affected by Where saved Default value Command only Recall settings Save settings Instrument reset Power cycle Usage :SENSe[n]:<function>:RESolution <value>...

  • Page 249: [:Source[N]]:Delay

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual [:SOURce[n]]:DELay This command sets the source delay. Type Affected by Where saved Default value Command and query Recall settings Save settings 0.001 Instrument reset Power cycle Usage [:SOURce[n]]:DELay <value>...

  • Page 250: [:Source[N]]::Protection[:Level]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details This command is used to enable or disable source delay. When enabled, the instrument will delay for a period that is set by the command: [:SOURce[n]]:DELay Example Turn on source delay and query the state.

  • Page 251: [:Source[N]]:[:Level][:Immediate][:Amplitude]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Example Set the voltage source protection to 30 V and query :VOLT:PROT 30 the value. :VOLT:PROT? Output: Also see None [:SOURce[n]]:<function>[:LEVel][:IMMediate][:AMPLitude] This command sets the source amplitude for voltage or current. Type Affected by Where saved...

  • Page 252: [:Source[N]]:Voltage:limit[:Amplitude]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference [:SOURce[n]]:VOLTage:LIMit[:AMPLitude] This command selects the limit of voltage source. Type Affected by Where saved Default value Command and query Recall settings Save settings 32.5 V for Model 2280S-32-6 Instrument reset 61 V for Model 2280S-60-3 Power cycle...

  • Page 253: [:Source[N]]:Voltage:slew:falling

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details Slew rate is defined as the maximum rate of change of output voltage per unit of time. The slew rising rate is applied to any voltage increase. When you turn on the output, the voltage rises at the specified rate.

  • Page 254: [:Source[N]]:List:

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference [:SOURce[n]]:LIST<list number>:<element> This command allows you to set up and query a list of custom values for a specified list. Type Affected by Where saved Default value Command only Instrument reset Nonvolatile memory...

  • Page 255: [:Source[N]]:List::Append

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual [:SOURce[n]]:LIST<list number>:<element>:APPEnd This command adds values to the specified list. Type Affected by Where saved Default value Command only Instrument reset Nonvolatile memory Not applicable Usage [:SOURce[n]]:LIST<list number>:<element>:APPEnd <string>...

  • Page 256: [:Source[N]]:List::Points

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference [:SOURce[n]]:LIST<list number>:<element>:POINts? This command queries the length of the specified list. Type Affected by Where saved Default value Query only Instrument reset Not applicable Not applicable Usage [:SOURce[n]]:LIST<list number>:CURRent:POINts? [:SOURce[n]]:LIST<list number>:VOLTage:POINts?

  • Page 257: [:Source[N]]:List:htime

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Also see None [:SOURce[n]]:LIST:HTIMe This command determines the hold time of the list running. Type Affected by Where saved Default value Command and query Power cycle Not applicable POINt Usage...

  • Page 258: [:Source[N]]:List:mcomplete

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Detail Import the list from external USB flash drive. Make sure that the external USB flash drive connect to the instrument before you send this command. An unstable connection between USB flash driver and the instrument will cause an error 520: "No USB flash drive found".

  • Page 259: [:Source[N]]:List:rcl

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 105: Step and sweep Example After each list step, the instrument generates a measure :LIST:MCOMP STEP complete pulse. Also see Digital I/O (on page 3-16) [:SOURce[n]]:LIST:RCL This command recalls a specific list.
  • Page 260 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example 1: Sweep list with BUS trigger (hold time type: TIME) Reset the instrument and stop the trigger model *RST Define list Program voltage list 1 with 5 points :LIST1:VOLT "1, 2, 3, 4, 5"...
  • Page 261 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Example 3: Step list with BUS trigger (hold time type: TIME) Reset the instrument and stop the trigger model *RST Define list Program the voltage list 1 with 2 points :LIST1:VOLT "1, 2"...
  • Page 262 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference You must allow the currently running list to finish before you run a new one. If you try to run a new one anyway, the command will be ignored. Example 4: Step list with BUS trigger (hold time type: POINt) Reset the instrument and stop the trigger model *RST...

  • Page 263: [:Source[N]]:List:save:internal

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual [:SOURce[n]]:LIST:SAVE:INTErnal This command stores the specified list to nonvolatile memory. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage [:SOURce[n]]:LIST:SAVE:INTErnal <list number>...

  • Page 264: [:Source[N]]:List:state

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Detail Save the specified list to the USB flash drive. Make sure that the external USB flash drive is connected to the instrument before you send this command.
  • Page 265 Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Example 1: Sweep list with BUS trigger (hold time type: TIME) Reset the instrument and stop the trigger model *RST Define list Program voltage list 1 with 5 points :LIST1:VOLT "1, 2, 3, 4, 5"...
  • Page 266 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example 3: Step list with BUS trigger (hold time type: TIME) Reset the instrument and stop the trigger model *RST Define list Program the voltage list 1 with 2 points :LIST1:VOLT "1, 2"...

  • Page 267: Status Subsystem

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual You must allow the currently running list to finish before you run a new one. If you try to run a new one anyway, the command will be ignored. Example 4: Step list with BUS trigger (hold time type: POINt) Reset the instrument and stop the trigger model *RST...

  • Page 268: Status:measurement[:Event]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:MEASurement[:EVENt]? This command reads and clears the Measurement Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :STATus:MEASurement[:EVENt]?

  • Page 269: Status:measurement:instrument[:Event]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :STATus:MEASurement:INSTrument[:EVENt]? This command reads and clears the Measurement Instrument Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage...

  • Page 270: Status:measurement:instrument:isummary[:Event]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:MEASurement:INSTrument:ISUMmary[:EVENt]? This command reads the Measurement Instrument Summary Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :STATus:MEASurement:INSTrument:ISUMmary[:EVENt]?

  • Page 271: Status:measurement:instrument:isummary:condition

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command sets or reads the contents of the enable register of the Measurement Instrument Summary Event Register (MISER). When one of these bits is set and the corresponding bit in the MISER set, bit 1 in the Measurement Instrument Event Register is set.

  • Page 272: Status:operation[:Event]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:OPERation[:EVENt]? This command reads and clears the Operation Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :STATus:OPERation[:EVENt]?

  • Page 273: Status:operation:instrument[:Event]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :STATus:OPERation:INSTrument[:EVENt]? This command reads and clears the Operation Instrument Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage...

  • Page 274: Status:operation:instrument:isummary[:Event]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:OPERation:INSTrument:ISUMmary[:EVENt]? This command reads the Operation Instrument Summary Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :STATus:OPERation:INSTrument:ISUMmary[:EVENt]?

  • Page 275: Status:operation:instrument:isummary:condition

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details This command sets or reads the contents of the enable register of the Operation Instrument Summary Event Register (OISER). When one of these bits is set and the corresponding bit in the OISER is set, bit 1 in the Operation Instrument Event Register is set.

  • Page 276: Status:preset

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:PRESet This command resets all the device-dependent enable registers. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage :STATus:PRESet Details Sending this command can reset the bits of the following enable registers to 0: ...

  • Page 277: Status:questionable:enable

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Also see Questionable Event Register (on page D-12) :STATus:QUEStionable:ENABle This command sets or reads the contents of the Questionable Event Enable Register of the status model. Type Affected by Where saved...

  • Page 278: Status:questionable:instrument:enable

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :STATus:QUEStionable:INSTrument:ENABle This command sets or reads the contents of the Questionable Instrument Event Enable Register of the status model. Type Affected by Where saved Default value Command and query Power cycle Not applicable...

  • Page 279: Status:questionable:instrument:isummary[:Event]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :STATus:QUEStionable:INSTrument:ISUMmary[:EVENt]? This command reads the Operation Instrument Summary Event Register of the status model. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :STATus:QUEStionable:INSTrument:ISUMmary[:EVENt]?

  • Page 280: Status:questionable:instrument:isummary:condition

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details This command sets or reads the contents of the enable register of the Questionable Instrument Summary Event Register (QISER). When one of these bits is set and the corresponding bit in the QISER is set, bit 1 in the Questionable Instrument Event Register is set.

  • Page 281: System:azero[N][:State]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SYSTem:AZERo[n][:STATe] This command enables and disables the autozero. Type Affected by Where saved Default value Command and query Recall settings Save settings 1 (ON) Instrument reset Power cycle Usage :SYSTem:AZERo[n][:STATe] <state>...

  • Page 282: System:communication:abort

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details This command enables or disables the beeper for error messages. When enabled, a beep signals that an error has happened. Example Enable the error beeper. :SYSTem:BEEPer:ERRor ON Also see :SYSTem:KCLick...

  • Page 283: System:communication:lan:configure

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SYSTem:COMMunication:LAN:CONFigure This command specifies the LAN configuration for the instrument. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory AUTO Usage :SYSTem:COMMunication:LAN:CONFigure AUTO :SYSTem:COMMunication:LAN:CONFigure MANual,"<IPaddress>"...

  • Page 284: System:communication:lan:macaddress

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SYSTem:COMMunication:LAN:MACaddress? This command queries the LAN MAC address. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :SYSTem:COMMunication:LAN:MACaddress? Details The MAC address is a character string representing the MAC address of the instrument in hexadecimal notation.

  • Page 285: System:error

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SYSTem:ERRor? This command reads the oldest error message from the event log. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :SYSTem:ERRor? Details...

  • Page 286: System:error:code[:Next]

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SYSTem:ERRor:CODE[:NEXT]? This command reads and clears the oldest error code. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :SYSTem:ERRor:CODE[:NEXT]? Details This command returns the numeric code of the next error in the event log.

  • Page 287: System:eventlog:save

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SYSTem:EVENtlog:SAVE This command saves the event log to a file on a USB flash drive. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage...

  • Page 288: System:kclick

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Sets the GPIB address and reads the address. :SYSTem:GPIB:ADDRess 26 Output: :SYSTem:GPIB:ADDRess? Also see GPIB communication (on page 2-40) :SYSTem:KCLick This command allows you to enable or disable the key click sound. Type Affected by Where saved...

  • Page 289: System:local

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :SYSTem:LOCal This command takes the instrument out of remote operation and restores the operation of front-panel controls. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable...

  • Page 290: System:password:lock

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SYSTem:PASSword:LOCK This command sets a remote interface to lock mode. Type Affected by Where saved Default value Command only Not applicable Not applicable ADMIN Usage :SYSTem:PASSword:LOCK <password> The password for remote connection <password>...

  • Page 291: System:password:new

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Also see :SYSTem:PASSword:LOCK (on page 7-105) :SYSTem:PASSword:NEW (on page 7-106) :SYSTem:PASSword:UNLock (on page 7-106) :SYSTem:PASSword:NEW This command sets a new password for the remote connection. Type Affected by Where saved Default value...

  • Page 292: System:posetup:state

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Details When a remote interface is locked, sending this command with the correct password will release it. Sending this command with wrong will cause the error, 509, "System password not correct." Example Unlock the present interface used to send this :SYST:PASS:UNL "ADMIN"...

  • Page 293: System:rwlock

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual Details Sending this command will return the instrument to the factory default conditions and erases all user data stored in nonvolatile memory, such as list parameter and setup information. This command does not influence the status structure registers and error queue.

  • Page 294: System:time

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :SYSTem:TIME This command sets the absolute time of the instrument. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory See Details Usage :SYSTem:TIME <hour>, <minute>, <second>...

  • Page 295: Trace[N]:Clear Or :Data[N]:Clear

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:CLEar or :DATA[n]:CLEar This command clears all readings in the buffer. Type Affected by Where saved Default value Command only Not applicable Not applicable Not applicable Usage :TRACe[n]:CLEar :DATA[n]:CLEar...

  • Page 296: Trace[N]:Data? Or :Data[N]:Data

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :TRACe[n]:DATA? or :DATA[n]:DATA? This query command returns all the readings from the buffer. Type Affected by Where saved Default value Query only Recall settings Not applicable Not applicable Instrument reset Power cycle...

  • Page 297: Trace[N]:Data:selected? Or :Data[N]:Data:selected

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual RELative and RSTamp are defined as the time since the first reading was stored in the buffer. These values are reset every 24-hours. DATE, TIME, and TSTamp represent absolute time from the internal real-time clock (RTC).
  • Page 298 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference For large buffers, you can get the data in 100 point increments. For example, if the data point is 250, TRACe:DATA:SELected 1,100,"READ, SOURce" command will return the first 100 readings and source values from the buffer.

  • Page 299: Trace[N]:Feed Or :Data[N]:Feed

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:FEED or :DATA[n]:FEED This command selects the source of readings. Type Affected by Where saved Default value Command and query Recall settings Save settings SENS Instrument reset Power cycle Usage :TRACe[n]:FEED <name>...

  • Page 300: Trace[N]:Feed:control Or :Data[N]:Feed:control

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :TRACe[n]:FEED:CONTrol or :DATA[n]:FEED:CONTrol This command determines if a reading buffer is filled continuously or is filled once and stops. Type Affected by Where saved Default value Command and query Recall settings Save settings...

  • Page 301: Trace[N]:Points Or :Data[N]:Points

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:POINts or :DATA[n]:POINts This command contains the number of readings a buffer can store. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset Power cycle...

  • Page 302: Trace[N]:Save Or :Data[N]:Save

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Query the number of stored reading in the buffer. :TRACe:POINts:ACTual? Output: Also see Reading buffer (on page 3-7) :TRACe[n]:SAVE or :DATA[n]:SAVE This command saves data from the specified reading buffer to a USB flash drive. Type Affected by Where saved...

  • Page 303: Trace[N]:Trigger:current:direction

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:TRIGger:CURRent:DIRection This command specifies whether the current rises above or falls below a specified level when the level trigger is activated. Type Affected by Where saved Default value Command and query Power cycle...

  • Page 304: Trace[N]:Trigger:current:state

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example The current threshold value is set to 1. TRAC:TRIG:CURR 1 TRAC:TRIG:CURR? Also see :TRACe[n]:TRIGger:CURRent:STATe (on page 7-119) :TRACe[n]:TRIGger:CURRent:DIRection (on page 7-118) :TRACe[n]:TRIGger:CURRent:STATe This command determines whether the current level trigger function is enabled. Type Affected by Where saved...

  • Page 305: Trace[N]:Trigger:occur

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:TRIGger:OCCUR? This command queries whether a level trigger has occurred. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :TRACe[n]:TRIGger:OCCur? Details This is a query command.

  • Page 306: Trace[N]:Trigger:voltage:direction

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference :TRACe[n]:TRIGger:VOLTage:DIRection This command specifies whether the voltage rises above or falls below a specified level when the level trigger is activated. Type Affected by Where saved Default value Command and query Power cycle...

  • Page 307: Trace[N]:Trigger:voltage[:Level]

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRACe[n]:TRIGger:VOLTage[:LEVel] This command configures the voltage threshold for the level trigger. Type Affected by Where saved Default value Command and query Power cycle Not applicable Usage :TRACe[n]:TRIGger:VOLTage[:LEVel] <voltage threshold>...

  • Page 308: Trigger Subsystem

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example The voltage level trigger function is enabled. TRAC:TRIG:VOLT:STAT 1 TRAC:TRIG:VOLT:STAT? Also see :TRACe[n]:TRIGger:VOLTage[:LEVel] (on page 7-122) :TRACe[n]:TRIGger:VOLTage:DIRection (on page 7-121) TRIGger subsystem The commands in this subsystem configure and control the trigger model for trigger layer. :TRIGger[:SEQuence[n]]:COUNt This command sets the number of times to repeat the trigger event.

  • Page 309: Trigger[:Sequence[N]]:Sample:count

    Section 7: SCPI command reference Series 2280 Precision Measurement DC Power Supplies Reference Manual :TRIGger[:SEQuence[n]]:SAMPle:COUNt This command sets the number of measurement per trigger event. Type Affected by Where saved Default value Command and query Recall settings Save settings Instrument reset Power cycle Usage :TRIGger[:SEQuence[n]]:SAMPle:COUNt <count>...
  • Page 310 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 7: SCPI command reference Example Select external triggering as the trigger source. :TRIG:SOUR EXT Also see :ARM[:SEQuence[n]]:SOURce (on page 7-18) Trigger model (on page 3-21) 077085501 / February 2015 7-125...

  • Page 312: Introduction

    What to do if the power supply does not turn on ...... 8-2 LAN troubleshooting suggestions..........8-2 Error summary ................. 8-3 Introduction This section includes troubleshooting information on the Keithley Instruments Series 2280 Precision Measurement DC Power Supplies, including a complete listing of error messages and troubleshooting suggestions. Contacting support When contacting Keithley, please have ready: ...

  • Page 313: What To Do If The Power Supply Does Not Turn On

    Section 8: Troubleshooting guide Series 2280 Precision Measurement DC Power Supplies Reference Manual What to do if the power supply does not turn on To solve problems you might encounter when turning on the instrument, follow these steps: 1. Verify that there is AC power to the power supply. First, check that the AC power cord is firmly plugged into the power connector on the rear panel of the power supply.

  • Page 314: Error Summary

    Messages in the Event Log are preceded by a numeric code called an Event Number. Negative (-) numbers are used for SCPI-defined messages, and positive (+) numbers are used for Keithley-defined messages. The event log supports up to 64 errors. You cannot disable the logging of errors...
  • Page 315 Section 8: Troubleshooting guide Series 2280 Precision Measurement DC Power Supplies Reference Manual Error code Error message -285 Program syntax error -284 Program currently running -282 Illegal program name -281 Cannot create program -274 Hardcopy configuration error -273 Hardcopy aborted -272 Hardcopy is busy -271...
  • Page 316 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 8: Troubleshooting guide Error code Error message -184 Command in alias requires more/fewer parameters -183 Invalid inside alias definition -181 Invalid outside alias definition -180 Alias error -178 Data type error -171 Invalid expression -170...
  • Page 317 Section 8: Troubleshooting guide Series 2280 Precision Measurement DC Power Supplies Reference Manual Error code Error message Calibration errors: Calibration error Not permitted with cal locked Calibration password is incorrect Bad sequence of calibration commands Calibration save failed Calibration data lost Busy on current step, wait until this step is completed Not permitted with cal unlocked Step1 Kmath error...
  • Page 318 Series 2280 Precision Measurement DC Power Supplies Reference Manual Section 8: Troubleshooting guide Error code Error message List errors: List error Too many list points List lengths not equivalent Assigning data to undefined list Attempt to run an empty list Save list failed List state is off Load list from USB flash drive failed...
  • Page 319 Section 8: Troubleshooting guide Series 2280 Precision Measurement DC Power Supplies Reference Manual 077085501 / February 2015...

  • Page 320: Next Steps

    Section 9 Next steps In this section: Additional Series 2280 information ........... 9-1 Additional Series 2280 information For additional information about the Series 2280, refer to:  The Product Information CD-ROM (ships with the product): Contains product documentation.   The Knowledge Center, which contains the following handbooks: ...

  • Page 322: Maintenance

    Appendix A Maintenance In this appendix: Introduction................A-1 Line fuse replacement .............. A-1 Upgrading the firmware ............A-2 Cleaning the front-panel display ..........A-4 Introduction The information in this section describes routine maintenance of the instrument that can be performed by the operator.

  • Page 323: Upgrading The Firmware

    8. Push the fuse drawer back into the power module. If the power line fuses continue to become damaged, a circuit malfunction exists and must be corrected. Return the instrument to Keithley Instruments for repair. Upgrading the firmware To upgrade the Series 2280 firmware, you load an upgrade file into the instrument. You can load the file from the USB port using the front panel of the instrument.

  • Page 324: From The Front Panel

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix A: Maintenance To locate the upgrade files on the Keithley website: 1. Select the Technical Support tab. 2. Search for your model number's firmware: In the model number box, type 2280.

  • Page 325: Cleaning The Front-Panel Display

    Appendix A: Maintenance Series 2280 Precision Measurement DC Power Supplies Reference Manual Cleaning the front-panel display Inspect the power supply as often as operating conditions require. To clean the exterior surface: 1. Remove loose dust on the outside of the power supply with a lint-free cloth. Use care to avoid scratching the display.

  • Page 326: Verification

    Appendix B Verification In this appendix: Overview .................. B-1 Test record ................B-1 Performance verification procedures ........B-8 Overview This topic contains performance verification procedures. Additional test equipment is required to complete the verification procedures. These procedures cover the models listed in the following table. Please ignore procedures that do not apply to the specific model you are testing.

  • Page 327: Dc Voltage Setting Accuracy With Remote Sense

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual Test Passed Failed DC voltage setting accuracy with remote sense DC voltage accuracy without remote sense DC voltage readback accuracy DC voltage line regulation DC voltage load regulation DC voltage detection DC current accuracy DC current readback accuracy (10 mA)

  • Page 328: Dc Voltage Setting Accuracy Without Remote Sense

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification DC voltage setting accuracy with remote sense Test Measured Model number voltage (V) current (A) Min (V) Max (V) voltage (V) 0 % test voltage 2280S-32-6 -0.003 0.003 2280S-60-3 -0.006 0.006...

  • Page 329: Dc Voltage Readback Accuracy With Remote Sense

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual DC voltage readback accuracy with remote sense Maximum Test Measured Absolute Model number voltage (V) current (A) voltage (V) readback (V) difference (mV) difference (mV) 0 % test voltage 2280S-32-6 2280S-60-3 25 % test voltage...

  • Page 330: Dc Voltage Load Regulation

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification DC voltage load regulation Model Nom - Max - Largest Max value number Min (V) Nom (V) 2280S-32-6 0.0052 2280S-60-3 0.008 DC overvoltage protection Measured OVP setting Model number voltage (V) Min (V) Max (V)

  • Page 331: Dc Current Readback Accuracy

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual DC current readback accuracy DC current readback accuracy on 10 A range Maximum difference Model Test Measured Absolute number current (A) current (A) readback (A) difference (mA) (mA) 0 % test current 2280S-32-6 0.25...

  • Page 332: Dc Current Line Regulation

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification DC current readback accuracy on 100 mA range Test Maximum Measured Absolute Model current current readback difference difference (A) number (mA) (mA) (mA) (mA) 0 % test current (100 mA) 2280S-32-6 2280S-60-3 10 % test current (100 mA)

  • Page 333: Dc Overcurrent Protection

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual DC overcurrent protection OCP setting Measured Model number value (A) Min (A) Max (A) current (A) 25 % OCP setting 2280S-32-6 1.39625 1.60375 2280S-60-3 0.698 0.902 50 % OCP setting 2280S-32-6 2.8925 3.1075...

  • Page 334: Performance Verification Conditions

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Performance verification conditions The following conditions must be met before performing these procedures: 1. The device under test (DUT) and all test equipment must have been operating continuously for 20 minutes in an environment that meets the operating range specifications for temperature and humidity.

  • Page 335: Required Equipment

    Electronic load Variable DC load capable of 6 A and 75 V DC DC voltmeter 7½ high accuracy voltmeter Keithley 2001/2002 High current hook up wire 18 AWG minimum connection wires Low current hook up wire 22 AWG minimum connection wires Isotek 50 m...
  • Page 336 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification To assure accurate measurements, it is important that a significant amount of current does not flow through the sense leads. For this reason, we recommend that the wiring of the remote sense and the voltmeter be physically located away from the high-current connections between the electronic load and the DUT.

  • Page 337: Check Dc Voltage Setting Accuracy Without Remote Sense

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 9. Turn the DUT output on. 10. Enter the voltmeter reading in the DC voltage setting accuracy with remote sense (on page B-3) and the DC voltage readback accuracy with remote sense (on page B-4) tables.
  • Page 338 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification 1. Set up the equipment, as shown in the following figure. Figure 109: Voltage accuracy and protection test setup Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9).

  • Page 339: Check Dc Voltage Readback Accuracy Without Remote Sense

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 2. Set the voltmeter as follows: a. Set to measure DC volts. b. Set the current range to auto range. 3. Set the electronic load as follows: a. Set to constant current (CC) mode. b.
  • Page 340 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9). To assure accurate measurements, connect the voltmeter as close as possible to the front panel of the DUT.

  • Page 341: Check Dc Voltage Line Regulation

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual Check DC voltage line regulation 1. Set up the equipment, as shown in the following figure. Figure 112: Voltage line regulation test setup 2. Change the AC power source output to the minimum voltage specified in the following table. DUT voltage selector switch AC source voltage 90 V...
  • Page 342 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9). 3. Set the voltmeter as follows: a. Set to measure DC volts. b.

  • Page 343: Check Dc Voltage Load Regulation

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual Check DC voltage load regulation This procedure uses the same test setup as the previous procedure (see Check DC voltage setting accuracy without remote sense (on page B-12)). Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9).

  • Page 344: Check Dc Overvoltage Protection

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Check DC overvoltage protection This procedure uses the same test setup as the previous procedure (see Check DC voltage setting accuracy without remote sense (on page B-12)). Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9).

  • Page 345: Check Dc Current Readback Accuracy (10 A And 1 A Ranges

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 1. Set up the equipment, as shown in the following figure. Ensure the warm-up criteria have been met, as described in Performance verification conditions page B-9). Figure 113: DC current accuracy and regulation test setup 2.

  • Page 346: Check Dc Current Readback Accuracy (100 Ma And 10 Ma Ranges

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification The Series 2280 has the following ranges to verify: 10 A, 1 A, 100 mA, and 10 mA range. Follow the procedures described below to check the current readback accuracy on 10 A and 1 A range. For other ranges, refer to Check DC current readback accuracy (100 mA and 10 mA ranges) (on page...
  • Page 347 Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 6. Turn the DUT output on. 7. Enter the voltmeter reading/(R1 + R2) in the DC current readback accuracy (on page B-6) table. 8. Enter the DUT current readout in the DC current readback accuracy (on page B-6) table under the current readout column.
  • Page 348 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9). 2. Set the voltmeter as follows: a. Set to measure DC volts. b.

  • Page 349: Check Dc Current Line Regulation

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual Check DC current line regulation 1. Set up the equipment, as shown in the following figure. Figure 116: Series 2280 current line regulation B-24 077085501 / February 2015...
  • Page 350 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification 2. Change the AC power source output to the minimum voltage specified in the following table. DUT voltage selector switch AC power source voltage 90 V 108 V 198 V 216 V Ensure the warm-up criteria have been met, as described in the...

  • Page 351: Check Dc Current Load Regulation

    Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 13. Calculate the two values: Nom – Min and Max – Nom. Enter the values in the appropriate columns in the DC current line regulation (on page B-7) table. 14.

  • Page 352: Check Overcurrent Protection

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification Check overcurrent protection This procedure uses the same test setup as the previous Check DC overvoltage protection (on page B-19). Ensure the warm-up criteria have been met, as described in the Performance verification conditions (on page B-9).
  • Page 353 Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 1. Plug the device under test (DUT) into your local line power from the mains. 2. Plug the test oscilloscope into the same mains outlet as the DUT. Some AC power sources create large amounts of high frequency noise on the power line that the instrument may not fully reject.

  • Page 354: Check Current Noise (20 Mhz

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix B: Verification 5. Set the oscilloscope as follows:  1 mV/division  1 M input resistance  20 MHz bandwidth limit  AC coupled  Autotrigger  1 ms/div  Set to measure V and V 6.
  • Page 355 Appendix B: Verification Series 2280 Precision Measurement DC Power Supplies Reference Manual 5. Set the oscilloscope as follows:  1 mV/division  1 M input resistance  20 MHz bandwidth limit  AC coupled  Autotrigger  1 ms/div  Set to measure V 6.

  • Page 356: Calibration

    Change the calibration password ...........C-21 Calibration constants ..............C-22 Overview Use the procedures in this section to calibrate the Keithley Instruments Series 2280 Precision Measurement DC Power Supplies. The information in this section is intended for qualified service personnel only. Do not attempt these procedures unless you are qualified to do so.

  • Page 357: Warmup Period

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Warmup period Allow the Series 2280 to warm up for at least one hour before performing calibration. If the instrument has been subjected to temperature extremes (those outside the ranges stated in Environmental conditions (on page C-1)), allow extra time for the instrument’s internal temperature to stabilize.
  • Page 358 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Required equipment This section lists the required equipment you need for voltage and current calibration procedures. Alternate equipment may be used, as long as the equipment has specifications at least as good as those listed in the table.
  • Page 359 Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Step 1 You can use 5 and 0.05  precision shunt resistors in series instead of the 5.05  shunt resistor. To verify the value, you need to make 4-wire sense connections between the shunts and the digital multimeter (DMM).
  • Page 360 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Figure 119: Measure the voltage across the shunts Figure 120: Measure the voltage across the 0.05 ohm shunt 077085501 / February 2015...

  • Page 361: Required Equipment

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Calibration connection You can calibrate the instrument using the front panel or by remote commands using ethernet, GPIB, or USB interfaces. Refer to Remote communication interfaces (on page 2-40) for more information on communicating with the instrument.
  • Page 362 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration When you are using a binding post on the front panel to make a calibration connection, insert the jumper wires to short the output terminals and sense terminals on the rear panel. For details, see the following figure.

  • Page 363: Current Calibration Connections

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Current calibration connections For current calibration, the following equipment is required:  Digital multimeter  Precision shunt resistors  Electronic load or resistor You can use either an electronic load or a resistor to perform current calibration. When calibrating the 1 A and 10 A ranges (steps 5 to 8), we recommend that you use an electronic load for lowest thermal drift and current stability.

  • Page 364: Front-Panel Calibration Procedure

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Figure 124: Low-current calibration connection using a resistor Front-panel calibration procedure To perform calibration from the front panel: 1. Turn on the instrument and allow it to warm up for at least one hour before performing the calibration.

  • Page 365: Voltage Calibration

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Voltage calibration Connect the instrument to a digital multimeter (DMM). For details, see Voltage calibration connection (on page C-6). You must input the measured value from the DMM. The value should be within the expected range. A message pop-up will indicate that the DMM data entry was out of the expected range.

  • Page 366: Low-Current Calibration

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Low-current calibration Perform the following steps to finish the low-current calibration:  Step 3 and step 4: Current calibration on the 10 mA and 100 mA ranges You must input the measured value from the DMM. The value should be within the expected range. A message pop-up will indicate that the DMM data entry was out of the expected range.

  • Page 367: High-Current Calibration

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual High-current calibration Connect the instrument with the digital multimeter (DMM), precision shunt resistor, and electronic load (or resistor). For details, see Current calibration connections (on page C-8). Perform the following steps to finish the high-current calibration: ...

  • Page 368: Saving Calibration Constants From The Front Panel

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Step 6 1. Before starting this calibration step, configure the shunt and load (electronic load or resistor load) as shown in the following table. Model Shunt Electronic load Resistor load 2280S-32-6 0.05 Ω...

  • Page 369: Remote Calibration Procedure

    To perform calibration from a remote interface: 1. Connect the Series 2280 to the computer using one of the following methods:  Use a shielded IEEE-488 cable, such as Keithley Instruments Model 7007  Use the CA-180-3A LAN crossover cable to connect to the ethernet port ...
  • Page 370 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration For Model 2280S-60-3, the expected value is shown in the following table. Steps Maximum voltage Minimum voltage 1.15 V 0.05 V 58.52 V 54.25 V Step 1 1. Send the following command to prepare calibration step 1: CALibration:PROTected:STEP1 2.

  • Page 371: Remote Low-Current Calibration

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Remote low-current calibration Connect the instrument with the digital multimeter (DMM), shunt, and electronic load (or resistor). For details, see Current calibration connections (on page C-8). You need to perform the following steps to finish the low-current calibration: ...

  • Page 372: Remote High-Current Calibration

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Step 4 1. Before calibration, configure the shunt and load (electronic load or resistor load), as shown in the following table. Model Shunt Electronic load Resistor load 2280S-32-6 5.05 Ω...
  • Page 373 Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Step 5 1. Before calibration, configure the shunt and load (electronic load or resistor load), as shown in the following table. Model Shunt Electronic load Resistor load 2280S-32-6 0.05 Ω...
  • Page 374 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Step 7 1. Before calibration, configure the shunt and load (electronic load or resistor load), as shown in the following table. Model Shunt Electronic load Resistor load 2280S-32-6 0.05 Ω...

  • Page 375: Saving Calibration Constants Using Scpi Comands

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Saving calibration constants using SCPI comands You can save the calibration constants to internal memory after each calibration procedure by sending: :CALibration:PROTected:SAVE However, it works differently when sending this command after each step in a procedure. See the following table.

  • Page 376: Change The Calibration Password

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration Change the calibration password To change the calibration password from the front panel: 1. Press the MENU key. 2. Under System, select Settings. 3. Select the button next to Password and press ENTER. The System Password screen is displayed.

  • Page 377: Calibration Constants

    Appendix C: Calibration Series 2280 Precision Measurement DC Power Supplies Reference Manual Calibration constants You can use the following command to read all the calibration constants in order of their index number: :CALibration:PROTected:DATA? For Model 2280S-60-3, the default calibration constants are listed in the following table. Index Default Default...
  • Page 378 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix C: Calibration For Model 2280S-32-6, the default calibration constants are listed in the following table. Index Default Default Calibration Error code number constant constant steps value tolerance Step 5 and 0.05 ...

  • Page 380: Status Model

    Appendix D Status model In this appendix: Overview ..................D-1 Programming and reading registers .........D-4 Clearing the registers ...............D-5 Status byte and service request ..........D-5 Status register sets ..............D-7 Queues ...................D-17 Serial polling and SRQ ............D-18 Status model programming examples ........D-18 Overview The status model consists of status register sets and queues.
  • Page 381 Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 125: Model 2280 status model diagram 077085501 / February 2015...
  • Page 382 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Figure 126: Questionable registers diagram Figure 127: Operation registers diagram 077085501 / February 2015...

  • Page 383: Programming And Reading Registers

    Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Figure 128: Status model measurement registers Programming and reading registers When you write to or read a status register, you can use binary, decimal, or hexadecimal values to represent the binary values of the bit states.

  • Page 384: Reading The Registers

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Reading the registers You can read any register in the Status Model. The response is a decimal value that indicates which bits in the register are set. See Register bit descriptions (on page D-8) for information on how to convert the decimal value to bits.

  • Page 385: Status Byte Register

    Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Status Byte Register The Status Byte Register consists of two 8-bit registers that control service requests, the Status Byte Register, and the Service Request Enable Register. These summary bits do not latch, and their states (0 or 1) are solely dependent on the summary messages (0 or 1).

  • Page 386: Service Request Enable Register

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Service Request Enable Register This register is programmed by the user and is used to enable or disable the setting of bit B6 (RQS/MSS) by the Status Summary Message bits (B0, B1, B2, B3, B4, B5, and B7) of the Status Byte Register.

  • Page 387: Register Bit Descriptions

    Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Register bit descriptions Standard Event Register The Standard Event Register records eight types of events that could occur in the instrument. See the following figure and table below it for details. Figure 130: Series 2280 Standard Event Register 077085501 / February 2015...

  • Page 388: Operation Event Register

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Decimal Bit name When set, indicates the following has value occurred: Operation complete (OPC) All pending selected device operations are completed and the Series 2280 is ready to accept new commands.
  • Page 389 Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Decimal Bit name When set, indicates the following value has occurred: 0 through 12 Not used Not used Not applicable. 8192 ISUM Summary of Operation Instrument Event Register and Operation Instrument Summary Event Register.
  • Page 390 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Operation Instrument Summary Event Register The bits of the Operation Instrument Summary Event Register are described in the following figure and table. Figure 133: Series 2280 Operation Instrument Summary Event Register Decimal Bit name When set, indicates the following has occurred:...
  • Page 391 Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Questionable Event Register The bits of the Questionable Event Register are described in the following figure and table. Figure 134: Series 2280 Questionable Event Register Decimal Bit name When set, indicates the following value has occurred:...
  • Page 392 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Questionable Instrument Event Register Questionable Instrument Event Register summarizes the Questionable Instrument Summary Event Register. If bit 1 of the Questionable Instrument Event Register is set and bit 1 of Questionable Instrument Event Enable Register is enabled, bit 13 (ISUM) of the Questionable Event Register is set.
  • Page 393 Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Questionable Instrument Summary Event Register The bits of Questionable Instrument Summary Event Register are described in the following figure and table. Figure 136: Series 2280 Questionable Instrument Summary Event Register Decimal Bit name When set, indicates the following has occurred:...
  • Page 394 Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Measurement Event Register The bits of the Measurement Event Register are described in the following figure and table below it. Figure 137: Series 2280 Measurement Event Register Decimal Bit name When set, indicates the following...
  • Page 395 Appendix D: Status model Series 2280 Precision Measurement DC Power Supplies Reference Manual Decimal Bit name When set, indicates the following value has occurred: Not used Not used Not applicable. SUM1 Summary of Measurement Instrument Summary Event Register. 2 through 15 Not used Not used Not applicable.

  • Page 396: Event Registers

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Event registers Each status register set has an event register. When an event occurs, the appropriate event register bit sets to 1. The bit remains latched to 1 until the register is reset. Reading an event register clears the bits of that register.

  • Page 397: Error Queue

    When empty, the message “0, No Error” is placed in the queue. Messages in the error queue are preceded by a code number. Negative (-) numbers are used for SCPI-defined messages and positive (+) numbers are used for Keithley-defined messages. See Troubleshooting for details. You can clear the error queue by sending the common command:...

  • Page 398: Srq When Trigger Model Is Finished

    Series 2280 Precision Measurement DC Power Supplies Reference Manual Appendix D: Status model Using SCPI commands: *RST *CLS STAT:MEAS:INST:ISUM:ENAB 256 STAT:MEAS:INST:ENAB 2 STAT:MEAS:ENAB 8192 *SRE 1 TRAC:CLE TRAC:POIN 10 SOUR:VOLT 1 TRIG:COUN 10 OUTP ON INIT *WAI OUTP OFF TRAC:DATA:SEL? 1, 10, "READ" SRQ when trigger model is finished This example shows you how to generate an SRQ when the trigger model is completed and the power supply has returned to the idle state.
  • Page 399 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. A G r eater Mea sur e of Confi denc e...

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