Keithley 2290-5 User Manual
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Keithley 2290-5 User Manual

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Model 2290-5
5 kV Power Supply
User's Manual
2290-5-900-01 Rev. A / December 2013
*P2290590001A*
2290-5-900-01
A Greater M esure of Confidence
www.keithley.com
A T ektr onix Company

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  • Page 1 Model 2290-5 5 kV Power Supply User’s Manual 2290-5-900-01 Rev. A / December 2013 *P2290590001A* 2290-5-900-01 A Greater M esure of Confidence A T ektr onix Company...
  • Page 2 All rights reserved. Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part, without the prior written approval of Keithley Instruments, Inc. is strictly prohibited. All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments, Inc.

  • Page 3: 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 4 (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 5: Table Of Contents

    Line fuse............................ 2-2 Interlock circuit ........................2-2 Connecting the interlock of the Model 2290-5 ................2-3 Connecting the Model 2290-5 output to a custom test fixture ........... 2-3 Basic operations ....................... 3-1 Numeric and cursor buttons ....................3-1 Select, Enter, Clear ......................3-1 Output filter ...........................
  • Page 6 Table of Contents Model 2290-5 5 kV Power Supply User's Manual Set current trip ........................3-7 Remote operation ..................... 4-1 Introduction .......................... 4-1 Connect GPIB cables to your instrument .................. 4-1 Set the GPIB address ....................... 4-3 Bus connections ........................4-3 Command syntax .........................
  • Page 7 Model 2290-5 5 kV Power Supply User's Manual Table of Contents Troubleshooting ....................... 9-1 Stuck buttons ........................9-1 Line power ..........................9-1 Repeated trips ........................9-1 Incorrect rear-panel output voltage ..................9-2 Front-panel test ........................9-2 Power-on reset ........................9-2 No high voltage ........................

  • Page 8: Introduction

    Rear-panel familiarization............1-6 Welcome Thank you for choosing a Keithley Instruments product. The Model 2290-5 5 kV power supply is designed for use in the laboratory and for test applications. It also has excellent regulation and low output voltage ripple. The digital displays provide accurate readings of voltage and current and also provide for easy, precise setting of output values using digital entry of current and voltage values.

  • Page 9: Cd-Rom Contents

    Basic operations: Set the voltage source, set the voltage trip limit, and set the current limit. Remote operation: Remote interfaces and commands. Status messages: Description of the Model 2290-5 status messages. Errors: Error numbers with descriptions. Typical applications: Detailed examples of how to use commands to accomplish certain test applications.

  • Page 10: Features

    Unpacking and inspecting Inspect for damage Upon receiving the Model 2290-5, carefully unpack the unit, and inspect for any obvious signs of physical damage that might have occurred during shipment. Notify the shipping agent of any damage immediately.

  • Page 11: Optional Accessories

    Model 2290-5 or Model 2290-10 High Voltage Power Supply to a lower voltage source-measure unit (SMU). Front-panel familiarization The Model 2290-5 front panel is shown below. Descriptions of the controls on the front panel follow the figure. Figure 1: Model 2290-5 front panel...
  • Page 12 Model 2290-5 5 kV Power Supply User's Manual Section 1: Introduction POWER button Press the POWER button so that it is in the on position to turn the instrument on. Press the POWER button so that it is in the off position to turn it off.

  • Page 13: Rear-Panel Familiarization

    Section 1: Introduction Model 2290-5 5 kV Power Supply User's Manual Rear-panel familiarization The Model 2290-5 rear panel is shown below. Descriptions of the controls on the rear panel follow the figure. Figure 2: Model 2290-5 rear panel Power entry...

  • Page 14: Line Cord

    Section 1: Introduction Line cord The Model 2290-5 uses a detachable, three-wire power cord for connection to the power source and to a safety earth ground through a grounded AC outlet. Only use the power cord that's provided with your instrument, or an equivalent adequately rated power cord.

  • Page 15: Safe Configuration And Test Setup

    Interlock circuit ................. 2-2 Introduction The Model 2290-5 can generate hazardous voltages. It is intended for use with a test fixture or in a test system that has safety mechanisms in place to prevent an operator from accessing these voltages.

  • Page 16: Safely Connect To Instruments

    Line voltage selection There are three versions of the Model 2290-5 to allow operation from a 100, 120, 220, or 240 V nominal AC power source with a line frequency of 50 or 60 Hz. Before connecting the power cord to a power source, verify that the line voltage selector card, located in the rear panel fuse holder, is set for the correct AC line voltage.

  • Page 17: Connecting The Interlock Of The Model 2290-5

    You can use a high-voltage SHV bulkhead connector (Model 2290-5-SHVBH) on your test fixture. The following sections show you how to connect a Model 2290-5 to a custom fixture and also how to make connections to the device inside the custom fixture.
  • Page 18 1 Model 2290-5-SHV cable • 1 Model 2290-5-SHVBH bulkhead connector The next figure shows a test configuration using the Model 2290-5 power supply with a safe interlock test enclosure circuit: Figure 5: Model 2290-5 high-voltage output connections 2290-5-900-01 Rev. A/December 2013...
  • Page 19 Model 2290-5 5 kV Power Supply User's Manual Section 2: Safe configuration and test setup Item Description Notes Model 2290-5-SHV high-voltage cable Model 2290-5-SHVBH high-voltage male bulkhead connector Test fixture protective earth (safety ground) Test fixture interlocked metal safety enclosure A safety enclosure with an interlock that has a normally open (NO) switch.

  • Page 20: Basic Operations

    Section 3 Basic operations In this section: Numeric and cursor buttons ............. 3-1 Select, Enter, Clear ..............3-1 Output filter................3-2 Store and recall ................ 3-3 Analog programming and monitor ..........3-4 Set output voltage ..............3-6 Turn output on ................3-6 Set voltage limit ................

  • Page 21: Output Filter

    Model 2290-5 5 kV Power Supply User's Manual Output filter The Model 2290-5 employs a switchable output filter for low noise performance. If higher slew rate or output power is required, the filter can be disabled. When the filter is enabled, the unit can reach either maximum voltage or maximum current but not both simultaneously.

  • Page 22: Store And Recall

    Model 2290-5 5 kV Power Supply User's Manual Section 3: Basic operations Store and recall STO (store) and RCL (recall) allow up to nine complete instrument setups to be saved in nonvolatile memory and later recalled. To store a setup: 1.

  • Page 23: Analog Programming And Monitor

    The next two figures show examples of analog output connections. The BNC jack outer shells are connected to chassis ground and cannot be floated. Figure 6: Model 2290-5 voltage and current monitor connections Figure 7: Model 2290-5 Voltage set connections...
  • Page 24 Model 2290-5 5 kV Power Supply User's Manual Section 3: Basic operations When the VOLTAGE switch is in the SET position, the REAR (rear panel) LED is on, and the output voltage is controlled by the rear panel signal and displayed on the center display when in the VOLTAGE SET mode.

  • Page 25: Set Output Voltage

    Section 3: Basic operations Model 2290-5 5 kV Power Supply User's Manual Set output voltage To manually set the output voltage, with the high voltage on or off (refer to the Front-panel familiarization graphic for more information): 1. Press the SELECT button until the VOLTAGE SET LED is on. The present voltage setting will appear on the center display.

  • Page 26: Set Current Limit

    Model 2290-5 5 kV Power Supply User's Manual Section 3: Basic operations Set the voltage limit as follows: 1. Press the SELECT button until the VOLTAGE LIMIT LED is lit. The present value of the voltage limit is shown on the center display.

  • Page 27: Remote Operation

    Remote commands ..............4-4 Introduction This section contains detailed information on remotely programming the Model 2290-5 over the IEEE- 488 (GPIB) interface. Any computer that supports the IEEE-488 bus may be used to program the instrument. The Model 2290-5 supports the IEEE-488.1 (1978) interface standard, as well as the required common commands of the IEEE-488.2 (1987) standard.
  • Page 28 Section 4: Remote operation Model 2290-5 5 kV Power Supply User's Manual To make a parallel connection to the instrument, stack the connectors. Each connector has two screws to ensure that connections remain secure. The figure below shows a typical connection diagram for a test system with multiple instrument .

  • Page 29: Set The Gpib Address

    A command to the Model 2290-5 must be followed by a command terminator. The terminator is a linefeed (<LF>) or EOI. No command processing occurs until a command terminator is received.

  • Page 30: Command Examples

    Sets the voltage to 100 V and queries the voltage. Remote commands The following Model 2290-5 commands are divided by the type of command: Output control, Setting control, Interface control, and Status reporting. Note that multiple parameters are separated by commas.

  • Page 31: Setting Control Commands

    Model 2290-5 5 kV Power Supply User's Manual Section 4: Remote operation VOUT? The VOUT? query returns the actual output voltage. This value is the same as that shown on the front panel VOLTS display. The value returned is a floating-point number and includes the positive sign of the output voltage.
  • Page 32 Section 4: Remote operation Model 2290-5 5 kV Power Supply User's Manual SMOD? The SMOD? query returns the VSET setting mode. A returned value of 0 indicates that the voltage value is controlled by the front panel or bus setting, while the value 1 indicates that the output is controlled by the rear panel SET/MON voltage control input.

  • Page 33: Interface Control Commands

    Interface control commands *RST The *RST (Reset) common command resets the Model 2290-5 to its default configuration. This command performs the same function as holding down the front panel CLR button at power-on. *IDN? The *IDN? (Identification) common query returns the Model 2290-5 device configuration. The response string is in the format: KEITHLEY INSTRUMENTS INC., MODEL 2290-5, <serial_number>, <version_number>...
  • Page 34 Section 4: Remote operation Model 2290-5 5 kV Power Supply User's Manual *ESE(?) <n> The *ESE common command sets the Standard Event Status Enable Register. The parameter <n> is the decimal value that programs the enable register. Example: *ESE 12 Set bits 2 and 3 *ESR? [<n>]...

  • Page 35: Status Messages

    Status Enable Register are not used in the Model 2290-5 and are always set to zero. On power-up, the 2290-5 will either clear all of its status enable registers or maintain them in the state they were in during power-down. The action taken is controlled by the *PSC command and allows events such as SRQ on power-up to be generated if desired.

  • Page 36: Status Byte Register

    The next table summarizes bits in the Status Byte, which may be read with the *STB? query or with the serial polling sequence. The Model 2290-5 will generate a service request (SRQ) whenever one of these bits is set and the corresponding bit in the Service Request Enable Register is set, except for bit 6, the RQS/MSS bit.
  • Page 37 Model 2290-5 5 kV Power Supply User's Manual Section 5: Status messages Table: Standard event status register Decimal value Name Description Unused Unused Query Error Set by an output queue overflow. Recall Error Set if a stored configuration setting is corrupt.

  • Page 38: Errors

    Section 6 Errors In this section: Error and status messages ............6-1 Error and status messages Table: Error messages The next table shows the error numbers that you will see on the center display. These errors also set corresponding bits of the Standard Event Status Register. Note that the CLR button clears any errors.

  • Page 39: Table: Summarizes Status Messages

    Section 6: Errors Model 2290-5 5 kV Power Supply User's Manual Table: Summarizes status messages The next table summarizes the status messages. Note that the message indicated in the next table is seen on the center display. Message Description VTRP...

  • Page 40: Typical Applications

    Introduction This section is broken into two examples: Example 1 demonstrates how to generate a basic linear voltage sweep with the Model 2290-5 to reverse bias a high voltage diode and make leakage current measurements at each point of the sweep.
  • Page 41 Model 2290-5 5 kV Power Supply User's Manual Device connections: The Model 2290-5 is a unipolar power supply. Therefore, the diode should be connected so that it can be reverse-biased, which means that the cathode should be connected to the HI output terminal of the Model 2290-5.

  • Page 42: Example Program Code

    Model 2290-5 5 kV Power Supply User's Manual Section 7: Typical applications Example program code The following code was created and tested using the Python programming language using the pyVISA module. To learn more about Python, go to www.python.org. The example python program code below can be copied and pasted for your testing purposes, however, the code must match to include the indents of specific lines.

  • Page 43: Program Example 2

    Instrument to the test fixture The output of the Model 2290-5 can only be turned on when the interlock is engaged. The interlock is engaged when the interlock pin is pulled high through a switch to more than +3 V. The interlock is disengaged when the signal applied is less than +1.2 V.
  • Page 44 Model 2290-5 5 kV Power Supply User's Manual Section 7: Typical applications Device connections: In the next figure is a simple circuit schematic of the test performed in this example: Figure 14: Model 2290-5 reverse-biased diode with SourceMeter 2290-5-900-01 Rev. A/December 2013...
  • Page 45 Section 7: Typical applications Model 2290-5 5 kV Power Supply User's Manual The next figures detail how these connections should be made in a safe test enclosure. Figure 15: Model 2290-5 reverse-biased diode connections with SourceMeter 2290-5-900-01 Rev. A/December 2013...
  • Page 46 Model 2290-5 5 kV Power Supply User's Manual Section 7: Typical applications The following figure indicates pin connections for the lid interlock connections to Models 2290-5 and 263xB. Figure 16: Model 2290-5 reverse-biased diode interlock connections Item Description Notes Model 2290-5-SHV high-voltage cable...

  • Page 47: Example Program Code

    Section 7: Typical applications Model 2290-5 5 kV Power Supply User's Manual Example program code The following code was created and tested using the Python programming language using the pyVISA module. To learn more about Python, go to www.python.org. The example python program code below can be copied and pasted for your testing purposes, however, the code must match yours to include the indents and spacing between lines.
  • Page 48 Model 2290-5 5 kV Power Supply User's Manual Section 7: Typical applications time.sleep(1) # Allow measurement to be taken currRdgList.append(currReading) voltage = voltage + 300 Set the voltage of the 2290 to 0V and turn off its output ki2290.write("VSET 0") ki2290.write("HVOF")

  • Page 49: Performance Verification

    70% or less, unless otherwise noted. Warm-up period The Model 2290-5 should be turned on and allowed to warm up for at least one hour before performing the verification procedures. The test equipment should also be allowed to warm up for the...

  • Page 50: Recommended Test Equipment

    Note that each procedure is performed both with the output filter off and with Filter 1 enabled. Since the Model 2290-5 specifications are the same for both Filter 1 and Filter 2, only the Filter 1 configuration requires testing.

  • Page 51: Dc Voltage Accuracy

    #18 AWG or larger wire. Figure 17: Model 2290-5 Connections for DC voltage accuracy tests 2. Turn on the power, and set the Model 2290-5 to its default conditions. (Press RCL, 0, and then ENTER.) 3. Select the multimeter DCV function, and enable autoranging.
  • Page 52 Section 8: Performance verification Model 2290-5 5 kV Power Supply User's Manual Table: Filters off DC voltage accuracy Output volts Volts display limits Multimeter voltage reading limits 0.4975 0.5026 1000 1005 0.9974 1.0026 1500 1495 1505 1.4974 1.5027 2000 1995 2005 1.9973...

  • Page 53: Dc Current Limit Accuracy

    2. With the power off, connect the 4.99 kΩ resistor, the 1 MΩ load resistor, and the multimeter to the Model 2290-5 HIGH VOLTAGE output connector, as shown in the next figure. Note that the multimeter is connected across the 4.99 kΩ resistor.
  • Page 54 5. With the high voltage off, allow the multimeter reading to settle and then enable REL to null any residual offset voltage. 6. Set the Model 2290-5 output voltage to 5000V, and set the current limit to 5mA. Turn the high voltage on.

  • Page 55: Troubleshooting

    Section 9 Troubleshooting In this section: Stuck buttons ................9-1 Line power................9-1 Repeated trips ................9-1 Incorrect rear-panel output voltage .......... 9-2 Front-panel test ................ 9-2 Power-on reset ................. 9-2 No high voltage ................ 9-2 Service ..................9-3 Stuck buttons If the center display is filled with a number (such as 4444) or one particular message (such as Err2), and the front panel buttons are unresponsive, check to see if a button is stuck.

  • Page 56: Incorrect Rear-Panel Output Voltage

    Doing so causes the unit to initialize the memory and load the default setup. No high voltage If the Model 2290-5 does not enable the high voltage, check to make sure that the HIGH VOLTAGE LED is on. If the HIGH VOLTAGE LED is OFF, check the following: 1.

  • Page 57: Service

    Model 2290-5 5 kV Power Supply User's Manual Section 9: Troubleshooting Service For repair and instrument adjustment services, contact your local Keithley Instruments representative. For worldwide contact numbers, visit the Keithley Instruments website (http://www.keithley.com). 2290-5-900-01 Rev. A/December 2013...
  • Page 58 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments, Inc. All other trademarks and trade names are the property of their respective companies. Keithley Instruments, Inc. Corporate Headquarters 28775 Aurora Road Cleveland, Ohio 44139 440-248-0400 Fax: 440-248-6168 1-888-KEITHLEY www.keithley.com...

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