Keysight 34972A User Manual
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Keysight 34972A User Manual

Data acquisition / switch unit
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Keysight 34970A/34972A
Data Acquisition / Switch
Unit
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Sie haben Fragen oder wünschen eine Beratung? Angebotsanfrage unter 07121 / 51 50 50 oder über info@datatec.de
User's Guide

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  • Page 1 Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Distributed by: Sie haben Fragen oder wünschen eine Beratung? Angebotsanfrage unter 07121 / 51 50 50 oder über info@datatec.de...
  • Page 2 Conformity. understood and met. where in the EULA. Keysight shall be under no obligation to update, revise or otherwise modify the Software. With WARNING respect to any technical data as defined by FAR 2.101, pursuant to FAR...

  • Page 3: Software Updates/Licenses

    Public License Version 2 ("GPLv2"). The text of the license and source code can be found at: www.keysight.com/find/GPLV2 This product utilizes Microsoft Windows CE. Keysight highly recommends that all Windows-based computers connected to Windows CE instruments utilize current anti-virus software. For more information, go to the product page at: www.keysight.com/find/34970A...

  • Page 4: Safety Symbols

    Standby supply. Unit is not completely disconnected from AC mains when Caution, risk of electric shock switch is off. Caution, risk of danger (refer to this manual for specific Warning or Caution Protective earth (ground) terminal information) IEC Measurement CAT I Keysight 34970A/34972A User’s Guide...

  • Page 5: Safety Considerations

    Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements.

  • Page 6: Do Not Remove The Instrument Cover

    Do not modify the instrument Do not install substitute parts or perform any unauthorized modification to the product. Return the product to an Keysight Sales and Service Office for service and repair to ensure that safety features are maintained. In case of damage...

  • Page 7: Regulatory Markings

    Industrial Scientific and Medical Group 1 Class A product. The CE mark is a registered trademark of the European Community. This CE mark shows that the product complies with all the relevant European Legal Directives. Keysight 34970A/34972A User’s Guide...

  • Page 8: Waste Electrical And Electronic Equipment (Weee) Directive 2002/96/ Ec

    To return this unwanted instrument, contact your nearest Keysight Service Center, or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/34970A –...

  • Page 9: Keysight 34970A/34972A Data Acquisition / Switch Unit

    Keysight 34970A/34972A Data Acquisition / Switch Unit Unless otherwise indicated, this manual applies to all serial numbers. NOTE The Keysight Technologies 34970A/34972A combines precision measurement capability with flexible signal connections for your production and development test systems. Three module slots are built into the rear of the instrument to accept any combination of data acquisition or switching modules.
  • Page 10 – GPIB (IEEE-488) interface and RS-232 interface are standard on the 34970A. Local Area Network (LAN) and Universal Serial Bus (USB) are standard on the 34972A. – SCPI (Standard Commands for Programmable Instruments) compatibility Keysight 34970A/34972A User’s Guide...

  • Page 11: The Front Panel At A Glance

    11 View Scanned Data, Alarms, Errors Menu 5 Alarm / Alarm Output Configuration Menu 12 Shift / Local Key 6 Scan-to-Scan Interval Menu 13 Knob 7 Scan List Single Step / Read Key 14 Navigation Arrow Keys Keysight 34970A/34972A User’s Guide...

  • Page 12: The Front-Panel Menu At A Glance

    2 Press the same menu key again to move to the next item of the menu. Typically, this is where you choose parameter values for the selected operation. Keysight 34970A/34972A User’s Guide...
  • Page 13 A brief confirmation message is displayed. Tip: To review the current configuration of a specific menu, press the menu key several times. A message NO CHANGES is displayed when you exit the menu. Keysight 34970A/34972A User’s Guide...

  • Page 14: Display Annunciators

    Alarms are enabled on displayed channel. Mx+B scaling is enabled on displayed channel. HI or LO alarm condition has occurred on indicated alarms. To review the display annunciators, hold down the key as you turn on the instrument. Keysight 34970A/34972A User’s Guide...

  • Page 15: The 34970A Rear Panel At A Glance

    Chapter For protection from electrical shock, the power cord ground must not be WARNING defeated. If only a two-contact electrical outlet is available, connect the instrument’s chassis ground screw (see above) to a good earth ground. Keysight 34970A/34972A User’s Guide...

  • Page 16: The 34972A Rear Panel At A Glance

    – Select and configure the LAN and USB interfaces (see Chapter [a] Under some conditions, while using the USB interface with the 34972A, you may experience connection or data loss in the presence of an electrical transient from the main power line. You can re-establish the USB communication by performing a reboot (cycle power) on the instrument.
  • Page 17 Chapter For protection from electrical shock, the power cord ground must not be WARNING defeated. If only a two-contact electrical outlet is available, connect the instrument’s chassis ground screw (see above) to a good earth ground. Keysight 34970A/34972A User’s Guide...

  • Page 18: Benchlink Data Logger 3 At A Glance

    BenchLink Data Logger 3 at a Glance The Keysight BenchLink Data Logger 3 software provides a convenient way to collect and analyze your data. The software uses a familiar spreadsheet environment, streamlining your data gathering needs. Simply identify the measurements you want to acquire, initiate the process, and see the data displayed on the computer screen.

  • Page 19: The Plug-In Modules At A Glance

    (external shunt resistors are not required). You can close multiple channels on this module only if you have not configured any channels to be part of the scan list. Otherwise, all channels on the module are break-before-make. Keysight 34970A/34972A User’s Guide...
  • Page 20 Normally-Closed, and Common contacts for each of the 20 switches. A breadboard area is provided near the screw terminals to implement custom circuitry, such as simple filters, snubbers, or voltage dividers. New serial number prefixes start with MY59000101 and SG59000101 Keysight 34970A/34972A User’s Guide...
  • Page 21 223. Use this module to sense status and control external devices such as solenoids, power relays, and microwave switches. For greater flexibility, you can read digital inputs and the count on the totalizer during a scan. Keysight 34970A/34972A User’s Guide...
  • Page 22 Use this module for high-density switching applications which require single-wire inputs with a common LO. All relays are break-before-make to ensure that only one relay is connected at any time. THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 34970A/34972A User’s Guide...

  • Page 23: Table Of Contents

    ........8 Keysight 34970A/34972A Data Acquisition / Switch Unit .
  • Page 24 ....68 To Configure the Remote Interface - 34972A ....71 To Store the Instrument State .
  • Page 25 ........139 Keysight 34970A/34972A User’s Guide...
  • Page 26 ......180 Mass Memory (USB) Subsystem - 34972A ..... 181 General capabilities .
  • Page 27 ........185 USB Drive Front Panel - 34972A .
  • Page 28 ......272 Measurement Fundamentals ....... . 276 Keysight 34970A/34972A User’s Guide...
  • Page 29 ....... .331 Driving External Switches ....... .332 Keysight 34970A/34972A User’s Guide...
  • Page 30 ........339 Specifications Keysight 34970A/34972A User’s Guide...
  • Page 31 ......117 Table 4-5 Digital Input, Totalize ......117 Keysight 34970A/34972A User’s Guide...
  • Page 32 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 34970A/34972A User’s Guide...

  • Page 33: Quick Start

    Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Quick Start This chapter is divided into the following sections: To Prepare the Instrument for Use BenchLink Data Logger Software To Connect Wiring to a Module To Set the Time and Date...

  • Page 34: To Prepare The Instrument For Use

    To Prepare the Instrument for Use 1 Check the list of supplied items. Verify that you have received the following items with your instrument. If anything is missing, contact your nearest Keysight Technologies Sales Office or Keysight authorized reseller. – One power cord.
  • Page 35 The self-test will begin when you release the key following the beep. If the self-test fails, see the 34970A/34972A Service Guide for instructions on returning the instrument to Keysight for service.

  • Page 36: Benchlink Data Logger Software

    BenchLink Data Logger Software The Keysight BenchLink Data Logger 3 software comes standard with the 34970A/34972A (if the internal DMM is ordered) and provides the basic data logger capabilities. Or, for increased capabilities, purchase the optional Keysight BenchLink Data Logger Pro software. This application provides advanced data logging and decision making with no programming required.

  • Page 37: On-Line Help System

    As you are installing the software, you will notice that the on-line Help system is available in several languages. Keysight 34970A/34972A User’s Guide...

  • Page 38: To Connect Wiring To A Module

    – For information on grounding and shielding, Slot Channel see page 270. – The diagrams on page 38 show how to connect wiring to a multiplexer module for each measurement function. Keysight 34970A/34972A User’s Guide...
  • Page 39 Channel n +8 (sense) on the 34902A. Ranges: 100, 1 k, 10 k, 100 k, 1 M, 10 M, 100 M Valid only on channels 21 and 22 on the 34901A Ranges: 10 mA, 100 mA, 1A RTD Types: 0.00385, 0.00391 Keysight 34970A/34972A User’s Guide...

  • Page 40: To Set The Time And Date

    To avoid the possibility of mul tiple signal sources becoming connected together, we recommend when mul tiplexing two or more sources they should be connected on separate modules or on separate banks of the same module. Keysight 34970A/34972A User’s Guide...
  • Page 41 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...

  • Page 42: To Configure A Channel For Scanning

    (full bright) setting for each parameter. The menu will time-out after about 20 seconds of inactivity and any changes NOTE made previously will take effect. Keysight 34970A/34972A User’s Guide...
  • Page 43 (all of the data is available from the remote interface). From the View menu, select and press READINGS again. Then press to choose the data you want to view for the selected channel as shown in the table below. Keysight 34970A/34972A User’s Guide...
  • Page 44 Time of Minimum Reading Maximum Reading on Channel Time of Maximum Reading Select Channel Average of Readings on Channel Second Most Recent Reading on Channel Third Most Recent Reading on Channel 99th Most Recent Reading on Channel Keysight 34970A/34972A User’s Guide...

  • Page 45: To Copy A Channel Configuration

    – Measurement configuration. – Mx+B scaling configuration. – Alarm configuration. – Advanced measurement configuration. New serial number prefixes start with MY59000101 and SG59000101. Keysight 34970A/34972A User’s Guide...
  • Page 46 Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, let’s copy the configuration to channel 105. PASTE TO 4 Copy the channel configuration to the selected channel. To copy the same configuration to other channels, repeat this procedure. NOTE Keysight 34970A/34972A User’s Guide...

  • Page 47: To Close A Channel

    Turn the knob until the desired channel is shown on the right side of front-panel display. For this example, select channel 213. 2 Close the selected channel. 3 Open the selected channel. will sequentially open all channels on the module in the selected slot. NOTE Keysight 34970A/34972A User’s Guide...
  • Page 48 34907A Multifunction Module (Totalizer) 34907A multifunction Module (DAC) [a] Only one channel can be closed at a time on this module. [b] Only one channel in each bank can be closed at a time on this module. Keysight 34970A/34972A User’s Guide...

  • Page 49: If The Instrument Does Not Turn On

    The instrument is shipped from the factory with a 500 mA fuse installed. This is the correct fuse for all line voltages. See the next page if you need to replace the power-line fuse. To replace the 500 mAT, 250 V fuse, order Keysight part number 2110-0458. Keysight 34970A/34972A User’s Guide...
  • Page 50 Fuse: 500 mAT (for all line voltages) Keysight Part Number: 2110-0458 3 Rotate the line-voltage selector until the 4 Replace the fuse-holder assembly in the rear correct voltage appears in the window. panel. 100, 120 (127), 220 (230), or 240 VAC Keysight 34970A/34972A User’s Guide...
  • Page 51 Fuse: 250 mAT (for all line voltages) Keysight Part Number: 2110-1704 3 Replace the fuse-holder assembly in the rear panel. New serial number prefixes starts with MY59000101 and SG59000101. Keysight 34970A/34972A User’s Guide...

  • Page 52: To Adjust The Carrying Handle

    Quick Start To Adjust the Carrying Handle To adjust the position, grasp the handle by the sides and pull outward. Then, rotate the handle to the desired position. Bench-top viewing position Carrying position Keysight 34970A/34972A User’s Guide...

  • Page 53: To Rack Mount The Instrument

    You can mount the instrument in a standard 19-inch rack cabinet using one of three optional kits available. Instructions and mounting hardware are included with each rack-mounting kit. Any Keysight System II instrument of the same size can be rack-mounted beside the 34970A/34972A.
  • Page 54 5063-9212. Be sure to use the support rails inside the rack cabinet. To install one or two instruments in a slid ing support shel f, order shel f 5063-9255, and slide kit 1494-0015 (for a single instrument, also order filler panel 5002-3999). Keysight 34970A/34972A User’s Guide...
  • Page 55 Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Front-Panel Overview Front-Panel Menu Reference To Monitor a Single Channel To Set a Scan Interval To Apply Mx+B Scaling to Measurements To Configure Alarm Limits To Read a Digital Input Port...

  • Page 56: Front-Panel Overview

    – Clear the state of the four alarm output lines. – Select the “Latch” or “Track” mode for the four alarm output lines. – Select the slope (rising or falling edge) for the four alarm output lines. Keysight 34970A/34972A User’s Guide...
  • Page 57 – View the first 20 alarms in the alarm queue (reading and time alarm occurred). – View up to 10 errors (34970A) or 20 errors (34972A) in the error queue. – Read the number of cycles for the displayed relay (relay maintenance feature).
  • Page 58 – Select the GPIB address. – Configure the RS-232 interface (baud rate, parity, and flow control). Configure the remote interface (34972A). – Configure the LAN settings (IP Address, Hostname, DHCP, etc.) – Configure the USB settings (Enable, USB ID, etc.) –...

  • Page 59: To Monitor A Single Channel

    This includes any combination of temperature, voltage, resistance, current, frequency, or period measurements on multiplexer channels. You can also monitor a digital input port or the totalizer count on the multifunction module. To disable monitoring, press again. Keysight 34970A/34972A User’s Guide...

  • Page 60: To Set A Scan Interval

    You can specify the number of times that the instrument will sweep through the scan list (the default is continuous). When the specified number of sweeps have occurred, the scan stops. Set the scan count to any number between 1 and 50,000 scans (or continuous). 00020 SCANS Keysight 34970A/34972A User’s Guide...

  • Page 61: To Apply Mx+B Scaling To Measurements

    You can specify an optional three-character label for your scaled readings (RPM, PSI, etc.). The default label is the standard engineering unit for the selected function (VDC, OHM, etc.). LABEL AS LBS 4 Run the scan and store the scaled readings in memory. Keysight 34970A/34972A User’s Guide...

  • Page 62: To Configure Alarm Limits

    A Factory Reset clears all alarm limits and turns off all alarms. An Instrument Preset or Card Reset does not clear the alarm limits and does not turn off alarms. ° +0.250,000 Keysight 34970A/34972A User’s Guide...
  • Page 63 Up to 20 alarms can be logged in the alarm queue. Reading the alarm queue using the View menu clears the alarms in the queue. Keysight 34970A/34972A User’s Guide...

  • Page 64: To Read A Digital Input Port

    The bit pattern read from the port will be displayed until you press another key, turn the knob, or until the display times out. To add a digital input channel to a scan list, press and select the NOTE DIO READ choice. Keysight 34970A/34972A User’s Guide...

  • Page 65: To Write To A Digital Output Port

    Decimal Display Shown 4 Output the bit pattern to the specified port. The specified bit pattern is latched on the specified port. To cancel an output operation in progress, wait for the display to time out. Keysight 34970A/34972A User’s Guide...

  • Page 66: To Read The Totalizer Count

    The count will be displayed until you press another key, turn the knob, or until the display times out. To manually reset the totalizer count, press To add a totalizer channel to a scan list, press and select the TOT READ NOTE choice. Keysight 34970A/34972A User’s Guide...

  • Page 67: To Output A Dc Voltage

    +05.250VDAC 4 Output the voltage from the selected DAC. The output voltage will be displayed until you press another key or turn the knob. To manually reset the output voltage to 0 volts, press Keysight 34970A/34972A User’s Guide...

  • Page 68: To Configure The Remote Interface - 34970A

    3 Save the change and exit the menu. Your computer’s GPIB interface card has its own address. Be sure to avoid using NOTE the computer’s address for any instrument on the interface bus. Keysight’s GPIB interface cards generally use address “21”. Keysight 34970A/34972A User’s Guide...
  • Page 69 EVEN, 7 BITS 4 Select the flow control method. Select one of the following: None (no flow control), RTS/CTS, DTR/DSR, XON/ XOFF (factory setting), or Modem. FLOW DTR/DSR 5 Save the changes and exit the menu. Keysight 34970A/34972A User’s Guide...
  • Page 70 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...

  • Page 71: To Configure The Remote Interface - 34972A

    Front-Panel Overview To Configure the Remote Interface - 34972A The instrument is shipped with both a Local Area Network (LAN) interface and a Universal Serial Bus (USB) interface. Both interfaces can be enabled at the same time and both interfaces are selected when the instrument is shipped from the factory.
  • Page 72 The instrument will display its USB identification (USB ID) string. This is helpful in identifying the device on the USB network. Use the left and right arrows above the knob to view the full string. USB0::2391::8199::MY01023529::0::INSTR 4 Save the changes and exit the menu. Keysight 34970A/34972A User’s Guide...
  • Page 73 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...

  • Page 74: To Store The Instrument State

    (the state is named LAST PWR DOWN). STORE STATE 2: STATE2 2 Store the instrument state The instrument stores all channel configurations, alarm values, scaling values, scan interval setups, and advanced measurement configurations. CHANGE SAVED Keysight 34970A/34972A User’s Guide...

  • Page 75: System Overview

    Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide System Overview Data Acquisition System Overview Signal Routing and Switching Measurement Input Control Output This chapter provides an overview of a computer-based system and describes the parts of a data acquisition system.

  • Page 76: Data Acquisition System Overview

    System Overview Data Acquisition System Overview You can use the Keysight 34970A/34972A as a stand-alone instrument, but there are many applications where you will want to take advantage of the built-in PC connectivity features. A typical data acquisition system is shown below.

  • Page 77: The Computer And Interface Cable (34970A Only)

    Data transfers up to 85,000 Data transfers up to 750,000 characters/sec. characters/sec. [a] You can overcome these cable length limitation using special communications hardware. For example, you can use the Keysight E5810A LAN-to-GPIB Gateway interface or a serial modem. Keysight 34970A/34972A User’s Guide...

  • Page 78: Measurement Software

    A variety of software is available to configure your data acquisition hardware and manipulate and display your measurement data. One particularly useful feature is 34972A’s Web Interface. Simply enter the IP address of your instrument in your browser’s navigation bar to launch the Web Interface.
  • Page 79 System Overview Data logging and monitoring Keysight BenchLink Data Logger 3, which is included with your 34970A/34972A is a Windows®-based application that makes it easy to use the instrument with your PC for gathering and analyzing measurements. Use this software to set up your test, acquire and archive measurement data, and perform real-time display and analysis of your measurements.

  • Page 80: The 34970A/34972A Data Acquisition / Switch Unit

    PC connectivity. The 34970A is shipped with both an GPIB (IEEE-488) interface and an RS-232 interface. Only one interface can be enabled at a time. The 34972A is shipped with Local Area Network (LAN) and Universal Serial Bus (USB) connectivity.

  • Page 81: Plug-In Modules

    Plug-In modules The 34970A/34972A offers a complete selection of plug-in modules to give you high-quality measurement, switching, and control capabilities. The plug-in modules communicate with the floating logic via the internal isolated digital bus.
  • Page 82 Dual 4-Channel RF Mux (50Ω) (<2 GHz). 75Ω high-frequency applications 34906A Dual 4-Channel RF Mux (75Ω) (<2 GHz). Control output General-purpose switching and control 34903A 20-Channel Actuator using Form C (SPDT) switches. 34907A Multifunction Module Digital Output, Voltage (DAC) Outputs. Keysight 34970A/34972A User’s Guide...

  • Page 83: System Cabling

    Requires special connectors. Often used with mass termination Flat Ribbon, Digital Input/Output connectors. These cables provide little Twisted pair Ribbon noise immunity. Teflon is a registered trademark of E.I. duPont deNemours and Company. Keysight 34970A/34972A User’s Guide...

  • Page 84: Transducers And Sensors

    Rotary Type Flow 4 mA to 20 mA Thermal Type Strain Resistive Elements 4-wire resistance from 10Ω to 10 kΩ Limit Switches Events Optical Counters 0V or 5V Pulse Train Rotary Encoder Digital System Status TTL Levels Keysight 34970A/34972A User’s Guide...

  • Page 85: Alarm Limits

    System Overview Alarm limits The 34970A/34972A has four alarm outputs which you can configure to alert you when a reading exceeds specified limits on a channel during a scan. You can assign a high limit, a low limit, or both to any configured channel in the scan list.

  • Page 86: Signal Routing And Switching

    Signal Routing and Switching The switching capabilities of the plug-in modules available with the 34970A/ 34972A provide test system flexibility and expandability. You can use the switching plug-in modules to route signals to and from your test system or multiplex signals to the internal DMM or external instruments.
  • Page 87 – Two-Wire Multiplexers for floating measurements. For more information, see page 316. – Four-Wire Multiplexers for resistance and RTD measurements. For more information, see page 317. – Very High Frequency (VHF) Multiplexers for switching frequencies up to 2.8 GHz. For more information, see page 327. Keysight 34970A/34972A User’s Guide...
  • Page 88 Any one of the signal sources can be connected to any one of the test inputs. Be aware that with a matrix, it is possible to connect more than one source at the same time. It is important to make sure that dangerous or unwanted conditions are not created by these connections. Keysight 34970A/34972A User’s Guide...
  • Page 89 You can use Form C switches to route signals but they are typically used to control external devices. Channel Open Channel Closed (NC Contact Connected) (NO Contact Connected) NO = Normally Open NC = Normally Closed Keysight 34970A/34972A User’s Guide...

  • Page 90: Measurement Input

    System Overview Measurement Input The 34970A/34972A allows you to combine a DMM (either internal or external) with multiplexer channels to create a scan. During a scan, the instrument connects the DMM to the configured multiplexer channels one at a time and makes a measurement on each channel.
  • Page 91 You can select the resolution and reading speed from 6 digits (22 bits) at 3 readings per second to 4 digits (16 bits) at up to 600 readings per second. The Advanced menu from the 34970A/34972A front panel allows you to control the integration period for precise rejection of noise signals.

  • Page 92: Scanning

    Readings are stored only during a scan and all readings are automatically time stamped. Each time you start a new scan, the instrument clears all readings stored in memory from the previous scan. Therefore, all readings currently stored in memory are from the most recent scan. Keysight 34970A/34972A User’s Guide...
  • Page 93 – You can start a scan by sending a software command from the remote interface. – You can start a scan when an external TTL trigger pulse is received. – You can start a scan when an alarm condition is logged on the channel being monitored. Keysight 34970A/34972A User’s Guide...

  • Page 94: Scanning With External Instruments

    If your application doesn’t require the built-in measurement capabilities of the 34970A/34972A, you can order it without the internal DMM. In this configuration, you can use the 34970A/34972A for signal routing or control applications. If you install a multiplexer plug-in module, you can use the 34970A/34972A for scanning with an external instrument.
  • Page 95 System Overview To control scanning with an external instrument, two control lines are provided. When the 34970A/34972A and the external instrument are properly configured, you can synchronize a scan sequence between the two. Channel Closed OUT Ext Trig IN 34970A/34972A...

  • Page 96: The Multifunction Module

    Each port has a separate channel number on the module and contains 8-bits. You can combine the two ports to read a 16-bit word. Bit 0 Port 1 (LSB) Channel 01 Digital Bit 7 Input Bit 0 Port 2 (MSB) Channel 02 Bit 7 Keysight 34970A/34972A User’s Guide...
  • Page 97 - 1). The count rolls over to “0” after reaching the maximum allowed value. – You can configure the totalizer to read without affecting the count or reset the count to zero without losing any counts. Keysight 34970A/34972A User’s Guide...

  • Page 98: Control Output

    Control Output In addition to signal routing and measurement, you can also use the 34970A/ 34972A to provide simple control outputs. For example, you can control external high-power relays using the actuator module or a digital output channel. The multifunction module The multifunction module (34907A) adds two additional control output capabilities to the system: digital output and voltage (DAC) output.
  • Page 99 1 mV steps. Each DAC is earth referenced; it cannot float. – Each DAC channel is capable of supplying 10 mA maximum current. You must limit the output current to 40 mA total for all three slots (six DAC NOTE channels). Keysight 34970A/34972A User’s Guide...

  • Page 100: The Actuator / General Purpose Switch

    – When used with high-power devices, however, it is critical that you provide protection to the switch from capacitive and inductive loads to ensure maximum relay life (for more information on attenuators, see the discussion on page 324). Keysight 34970A/34972A User’s Guide...
  • Page 101 Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Features and Functions SCPI Language Conventions Scanning Scanning with External Instruments General Measurement Configuration Temperature Measurement Configuration Voltage Measurement Configuration Resistance Measurement Configuration Current Measurement Configuration Frequency Measurement Configuration Mx+B Scaling...
  • Page 102 You will find that this chapter makes it easy to look up all the details about a particular feature of the 34970A/34972A. Whether you are operating the instrument from the front panel or over the remote interface, this chapter will be useful.

  • Page 103: Features And Functions

    – A vertical bar (| ) separates multiple parameter choices. Rules for using a channel list Many of the SCPI commands for the 34970A/34972A include a scan_list or ch_list parameter, which allow you to specify one or more channels. The channel number has a form (@scc), where s is the slot number (100, 200, or 300) and cc is the channel number.

  • Page 104: Scanning

    (the most recent readings are always preserved). You can read the contents of memory at any time, even during a scan. Reading memory is not cleared when you read it. Keysight 34970A/34972A User’s Guide...
  • Page 105 DAC voltage or write to a digital port (even if the totalizer is part of the scan list). However, you cannot change any parameters that affect the scan (channel configuration, scan interval, Card Reset, etc.) while a scan is running. Keysight 34970A/34972A User’s Guide...
  • Page 106 – If the internal DMM is installed and enabled, the instrument will automatically use it for scanning. For externally-controlled scans, you must either remove the internal DMM from the 34970A/34972A or disable it (see “Internal DMM Disable” on page 157).

  • Page 107: Power Failure

    No error is generated. – If you replace a module with a module of the same type while power is off, the instrument will continue scanning when power is restored. No error is generated. Keysight 34970A/34972A User’s Guide...

  • Page 108: Adding Channels To A Scan List

    – To initiate a scan and store all readings in memory, press (the SCAN annunciator will turn on). Each time you initiate a new scan, the instrument clears all previously stored readings. – To stop a scan, press and hold Keysight 34970A/34972A User’s Guide...
  • Page 109 Use the FETCh? command to retrieve stored readings from memory. See the Keysight 34970A/34972A Programmer’s Reference Help for more information on using these commands. – When you reconfigure a channel and add it to the scan list using MEASure? or CONFigure, it is important to note that the previous configuration on that channel is lost.

  • Page 110: Scan Interval

    1 to 50,000 scans, or continuous) Scan List (1 sweep) Scan-to-Scan interval (0 to 99:59:59 hours) – You can set the scan interval to any value between 0 seconds and 99:59:59 hours (359,999 seconds), with 1 ms resolution. Keysight 34970A/34972A User’s Guide...
  • Page 111 TRIG:SOURCE TIMER Select the interval timer configuration Set the scan interval to 5 seconds TRIG:TIMER 5 Sweep the scan list 2 times TRIG:COUNT 2 Initiate the scan INIT To stop a scan, send the ABORt command. NOTE Keysight 34970A/34972A User’s Guide...
  • Page 112 NOTE – Remote Interface Operation: The following program segment configures the instrument for a Scan Once operation. Select the bus (once) configuration TRIG:SOURCE BUS Sweep the scan list 2 times TRIG:COUNT 2 Initiate the scan INIT Keysight 34970A/34972A User’s Guide...
  • Page 113 (until the scan count is reached or until you abort the scan). – Mx+B scaling and alarm limits are applied to measurements during the scan and all data is stored in non-volatile memory. Keysight 34970A/34972A User’s Guide...
  • Page 114 (which does not have to be part of the scan list and you do not have to use the Monitor function). For example, you can generate an alarm on a totalizer channel which will initiate a scan when a specific count is reached. Keysight 34970A/34972A User’s Guide...
  • Page 115 . When an alarm event occurs, the scan starts and readings are stored in memory. To stop a scan, press and hold NOTE – Remote Interface Operation: The following program segment configures the instrument to scan when an alarm occurs Keysight 34970A/34972A User’s Guide...
  • Page 116 CALC:LIM:UPPER 5,(@103) Enable the upper limit CALC:LIM:UPPER:STATE ON,(@103) Report alarms on Alarm 1 OUTPUT:ALARM1:SOURCE (@103) Select monitor channel ROUT:MON (@103) Enable monitoring ROUT:MON:STATE ON Initiate the scan INIT To stop a scan, send the ABORt command. NOTE Keysight 34970A/34972A User’s Guide...

  • Page 117: Scan Count

    The default is CONTINUOUS. To set the count to a value between 1 and 50,000 scans, turn the knob clockwise and enter a number. – Remote Interface Operation: TRIG:COUNT 20 To configure a continuous scan, send TRIG:COUNT INFINITY. NOTE Keysight 34970A/34972A User’s Guide...

  • Page 118: Reading Format

    (relative time is shown). 1 Reading with Units (26.195 °C) 3 Time Since Start of Scan (17 ms) 2 Channel Number 4 Alarm Limit Threshold Crossed 0 = No Alarm, 1 = LO, 2 = HI) Keysight 34970A/34972A User’s Guide...

  • Page 119: Channel Delay

    – The MEASure? and CONFigure commands set the channel delay to automatic. A Factory Reset (*RST command) also sets the channel delay to automatic. – Front-Panel Operation: CH DELAY TIME – Remote Interface Operation: The following command adds a 2-second channel delay to channel 101. ROUT:CHAN:DELAY 2,(@101) Keysight 34970A/34972A User’s Guide...

  • Page 120: Automatic Channel Delays

    200 ms 100MΩ 200 ms 100MΩ 200 ms Table 4-3 AC Voltage, AC Current (for all ranges) AC fil ter Channel delay Slow (3 Hz) 7.0 sec Medium (20 Hz) 1.0 sec Fast (200 Hz) 120 ms Keysight 34970A/34972A User’s Guide...
  • Page 121 – Front-Panel Operation: CH DELAY AUTO – Remote Interface Operation: The following command enables an automatic channel delay on channel 01. ROUT:CHAN:DELAY:AUTO ON,(@101) Selecting a specific channel delay using the ROUTe:CHANnel:DELay command disables the automatic channel delay. Keysight 34970A/34972A User’s Guide...

  • Page 122: Viewing Readings Stored In Memory

    You will not be able to view these readings. – The INITiate command stores readings in memory. Use the FETCh? command to retrieve stored readings from memory (the readings are not erased when you read them). Keysight 34970A/34972A User’s Guide...
  • Page 123 Second Most Recent Reading on Channel Third Most Recent Reading on Channel 99th Most Recent Reading on Channel – Remote Interface Operation: The following command retrieves stored readings from memory (the readings are not erased). FETCH? Keysight 34970A/34972A User’s Guide...
  • Page 124 This allows you to continue a scan without losing data stored in memory (if memory becomes full, new readings will overwrite the first readings stored). The specified number of readings are cleared from memory, starting with the oldest reading. DATA:REMOVE? 12 Keysight 34970A/34972A User’s Guide...

  • Page 125: Scanning With External Instruments

    If your application doesn’t require the built-in measurement capabilities of the 34970A/34972A, you can order it without the internal DMM. In this configuration, you can use the 34970A/34972A for signal routing or control applications. If you install a multiplexer plug-in module, you can use the 34970A/34972A for scanning with an external instrument.
  • Page 126 100 through slot 300. For an externally-controlled scan, you must either remove the internal DMM from the 34970A/34972A or disable it (see “Internal DMM Disable” on page 175). Since the internal DMM is not used, readings from multiplexer channels are not stored in internal reading memory.
  • Page 127 DMM is removed (or disabled), the default scan interval source is “timer.” For more information, refer to “Scan Interval” on page 94. – You can configure the event or action that notifies the 34970A/34972A to advance to the next channel in the scan list. Note that the Channel Advance source shares the same sources as the scan interval.
  • Page 128 ROUT:CHAN:ADV:SOUR EXT Set the scan interval to 5 seconds TRIG:TIMER 5 Sweep the scan list 2 times TRIG:COUNT 2 Initiate the scan INIT To configure the instrument for 4-wire external scanning, send the following command. ROUTe:CHANnel:FWIRe {OFF|ON}[,(@<ch_list>)] Keysight 34970A/34972A User’s Guide...

  • Page 129: General Measurement Configuration

    – For temperature measurements, the instrument internally selects the range; you cannot select which range is used. For thermocouple measurements, the instrument internally selects the 100 mV range. For thermistor and RTD measurements, the instrument autoranges to the correct range for the transducer resistance measurement. Keysight 34970A/34972A User’s Guide...
  • Page 130 Features and Functions – For frequency and period measurements, the "range" parameter is used to compute a specific measurement resolution (see the Keysight 34970A/34972A Programmer’s Reference Help for details). When specifying a (non-default) resolution, both the range and resolution parameters must be specified within the MEASure? and CONFigure commands.

  • Page 131: Measurement Resolution

    – The specified resolution is used for all measurements on the selected channel. If you have applied Mx+B scaling or have assigned alarms to the selected channel, those measurements are also made using the specified resolution. Measurements taken during the Monitor function also use the specified resolution. Keysight 34970A/34972A User’s Guide...
  • Page 132 The following statement selects the 1 A range with 6½ digits of resolution on channel 221. MEAS:CURR:AC? 1,1E-6,(@221) – You can also select the resolution using the SENSe commands. For example, the following statement specifies a 4-wire ohms measurement with 100Ω of resolution on channel 103. SENS:FRES:RES 100,(@103) Keysight 34970A/34972A User’s Guide...

  • Page 133: Custom A/D Integration Time

    5½ Digits 2 PLC <0.0000022 x Range 6½ Digits 10 PLC <0.000001 x Range 6½ Digits 20 PLC <0.0000008 x Range 6½ Digits 100 PLC <0.0000003 x Range 6½ Digits 200 PLC <0.00000022 x Range 6½ Digits Keysight 34970A/34972A User’s Guide...
  • Page 134 10 PLC for DC voltage measurements on channel 301. SENS:VOLT:DC:NPLC 10,(@301) You can also select an aperture time using the SENSe commands. For example, the following statement specifies an aperture time of 2 ms for resistance measurements on channel 104. SENS:RES:APER 0.002,(@104) Keysight 34970A/34972A User’s Guide...

  • Page 135: Autozero

    Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command). – Remote Interface Operation: The OFF and ONCE parameters have a similar effect. Autozero OFF does not issue a new zero measurement. Autozero ONCE issues an immediate zero measurement. ZERO:AUTO {OFF|ONCE|ON}[,(@<ch_list>)] Keysight 34970A/34972A User’s Guide...

  • Page 136: Temperature Measurement Configuration

    – Setting the Mx+B measurement label to °C, °F, or K has no effect on the temperature measurement units currently selected. – Front-Panel Operation: First, select the temperature function on the active channel. Then, select the temperature units. UNITS °F – Remote Interface Operation: UNIT:TEMP F,(@103) Keysight 34970A/34972A User’s Guide...

  • Page 137: Thermocouple Measurements

    If an open connection is detected (greater than 5 kΩ on the 10 kΩ range), the instrument reports an overload condition for that channel (or displays “OPEN T/C” on the front panel). Keysight 34970A/34972A User’s Guide...
  • Page 138 The following statements use the SENSe command to set a fixed reference junction temperature of 40 degrees (always in °C) on channel 203. SENS:TEMP:TRAN:TC:RJUN:TYPE FIXED,(@203) SENS:TEMP:TRAN:TC:RJUN 40,(@203) The following statement enables the thermocouple check feature on the specified channels (opens are reported as “+9.90000000E+37”). SENS:TEMP:TRAN:TC:CHECK ON,(@203,301) Keysight 34970A/34972A User’s Guide...

  • Page 139: Rtd Measurements

    RTD type. For example, the following statement configures channel 301 for 2-wire measurements of an RTD with α = 0.00385 (use “85” to specify α = 0.00385 or “91” to specify α = 0.00391). CONF:TEMP RTD,85,(@301) Keysight 34970A/34972A User’s Guide...
  • Page 140 103 for 4-wire measurements of an RTD with α = 0.00391 (channel 103 is automatically paired with channel 113 for the 4-wire measurement). SENS:TEMP:TRAN:FRTD:TYPE 91,(@103) The following statement sets the nominal resistance (R ) to 1000Ω on channel 103. SENS:TEMP:TRAN:FRTD:RES 1000,(@103) Keysight 34970A/34972A User’s Guide...

  • Page 141: Thermistor Measurements

    301 for measurements of a 5 kΩ thermistor: CONF:TEMP THER,5000,(@301) You can also use the SENSe command to select the probe type and thermistor type. For example, the following statement configures channel 103 for measurements of a 10 kΩ thermistor: SENS:TEMP:TRAN:THERM:TYPE 10000,(@103) Keysight 34970A/34972A User’s Guide...

  • Page 142: Voltage Measurement Configuration

    – Front-Panel Operation: First, select the DC voltage function on the active channel. Then, go to the Advanced menu and select 10 MΩ (fixed resistance for all DC voltage ranges) or >10 GΩ. The default is 10 MΩ. INPUT R >10 G Keysight 34970A/34972A User’s Guide...

  • Page 143: Ac Low Frequency Filter

    The instrument selects the appropriate filter based on the frequency you specify (see table above). The MEASure? and CONFigure commands automatically select the 20 Hz (medium) filter. Select the slow filter (3 Hz) SENS:VOLT:AC:BAND 3,(@203) Keysight 34970A/34972A User’s Guide...

  • Page 144: Resistance Measurement Configuration

    Then, go to the Advanced menu and enable or disable offset compensation. OCOMP ON – Remote Interface Operation: Enable offset compensation (2-wire) RES:OCOM ON,(@208) Enable offset compensation (4-wire) FRES:OCOM ON,(@208) For 4-wire measurements, specify the paired channel in the lower bank (source) as the <ch_list> parameter. Keysight 34970A/34972A User’s Guide...

  • Page 145: Current Measurement Configuration

    – The instrument selects the medium filter (20 Hz) when the function is changed or after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting. Keysight 34970A/34972A User’s Guide...
  • Page 146 The instrument selects the appropriate filter based on the frequency you specify (see table on previous page). The MEASure? and CONFigure commands automatically select the 20 Hz (medium) filter. Select the slow filter (3 Hz) SENS:VOLT:AC:BAND 3,(@203) Keysight 34970A/34972A User’s Guide...

  • Page 147: Frequency Measurement Configuration

    The instrument selects the appropriate timeout based on the frequency you specify (see table above). The MEASure? and CONFigure commands automatically select the 20 Hz (medium) timeout. Select the slow timeout (3 Hz) SENS:FREQ:RANG:LOW 3,(@203) Keysight 34970A/34972A User’s Guide...

  • Page 148: Mx+B Scaling

    This allows you to adjust for voltage or resistive offsets through your wiring to the point of the measurement. – During a Monitor operation, the gain and offset values are applied to all readings on the specified channel. Keysight 34970A/34972A User’s Guide...
  • Page 149 4-wire resistance measurement with scaling. For more information, refer to “Strain Gage Measurements” on page 308. Keysight BenchLink Data Logger 3 software has built-in strain gage NOTE measurement capability. Use the following equations to calculate the gain and offset.
  • Page 150 After setting the gain and offset values, send the following command to enable the scaling function on the specified channel. CALC:SCALE:STATE ON,(@101) To make a null measurement and store it as the offset, send the following command. CALC:SCALE:OFFSET:NULL (@101) Keysight 34970A/34972A User’s Guide...

  • Page 151: Alarm Limits

    – You can assign an alarm to any configured channel and multiple channels can be assigned to the same alarm number. However, you cannot assign alarms on a specific channel to more than one alarm number. Keysight 34970A/34972A User’s Guide...
  • Page 152 – Each time you start a new scan, the instrument clears all readings (including alarm data) stored in reading memory from the previous scan. Therefore, the contents of reading memory are always from the most recent scan. Keysight 34970A/34972A User’s Guide...
  • Page 153 – In addition to being stored in reading memory, alarms are also recorded in their own SCPI status system. You can configure the instrument to use the status system to generate a Service Request (SRQ) when alarms are generated. See the Keysight 34970A/34972A Programmer’s Reference Help for more information. Keysight 34970A/34972A User’s Guide...
  • Page 154 – To set the upper and lower alarm limits on the specified channels, use the following commands. CALC:LIMIT:UPPER 5.25,(@103,212) CALC:LIMIT:LOWER 0.025,(@103,212) – To enable the upper and lower alarm limits on the specified channels, use the following commands. CALC:LIMIT:UPPER:STATE ON,(@103,212) CALC:LIMIT:LOWER:STATE ON,(@103,212) Keysight 34970A/34972A User’s Guide...

  • Page 155: Viewing Stored Alarm Data

    The alarm queue is cleared when you read the alarms. NOTE – Remote Interface Operation: The following command reads data from the alarm queue (one alarm event is read and cleared each time this command is executed). SYSTEM:ALARM? Keysight 34970A/34972A User’s Guide...
  • Page 156 (0 = No Alarm, 1 = LO, 2 = HI) 3 3 Time (2:39:40.058 PM) 6 6 Alarm Number Reported (1, 2, 3, or 4) The following command retrieves scanned readings and alarm data from reading memory (the readings are not erased). FETCH? Keysight 34970A/34972A User’s Guide...

  • Page 157: Using The Alarm Output Lines

    (even during a scan) and the alarm data in memory is not cleared (however, data is cleared when you initiate a new scan). The alarm outputs are also cleared when you initiate a new scan. Keysight 34970A/34972A User’s Guide...
  • Page 158 Clear all four alarm outputs OUTPUT:ALARM:CLEAR:ALL To select the output configuration for all four output lines, use the following command. OUTPut:ALARm:MODE {LATCh|TRACk} To configure the slope of all four output lines, use the following command. OUTPut:ALARm:SLOPe {NEGative|POSitive} Keysight 34970A/34972A User’s Guide...

  • Page 159: Using Alarms With The Multifunction Module

    NOT PATTERN , PATTERN MATCH 00X10010 BIN Bit 7 Bit 0 To configure an alarm on a totalizer channel, select a high limit and then set the desired count for the selected alarm. HI ALARM ONLY Keysight 34970A/34972A User’s Guide...
  • Page 160 Assume that you want to generate an alarm when a binary pattern of “1000” is read on the upper four bits of port 1. Send the following commands to configure the port for an alarm. CALC:COMP:TYPE EQUAL,(@301) CALC:COMP:DATA 128,(@301) CALC:COMP:MASK 240,(@301) OUTPUT:ALARM2:SOURCE (@301) CALC:COMP:STATE ON,(@301) Keysight 34970A/34972A User’s Guide...
  • Page 161 To configure an alarm on a totalizer channel, specify the desired count as the upper limit using the following command. CALCulate:LIMit:UPPer <count>[,(@<ch_list>)] To enable the upper limit on the specified totalizer channel, use the following command. CALCulate:LIMit:UPPer:STATe ON [,(@<ch_list>)] Keysight 34970A/34972A User’s Guide...

  • Page 162: Digital Input Operations

    Card Reset (SYSTem:CPON command) from the remote interface will reconfigure both ports as input ports. Note that a from the front panel resets only the port currently selected NOTE (both ports are not reset). Keysight 34970A/34972A User’s Guide...
  • Page 163 Read port 02 SENS:DIG:DATA:BYTE? (@302) Read both ports together SENS:DIG:DATA:WORD? (@301) To redefine the scan list to include a digital read (8-bit read only), send the following command. Add port 02 read to scan list CONF:DIG:BYTE (@302) Keysight 34970A/34972A User’s Guide...

  • Page 164: Totalizer Operations

    Move the jumper to the “AC” position to detect changes through 0 volts. Move the jumper to the “TTL” position (factory setting) to detect changes through TTL threshold levels. 2.5 V Threshold (TTL) 0 V Threshold (AC) Keysight 34970A/34972A User’s Guide...
  • Page 165 To configure the totalizer to count on the falling edge or rising edge of the input signal, choose from the following items. COUNT FALLING , COUNT RISING – To add a totalizer read to a scan list, choose the following item. TOT READ Keysight 34970A/34972A User’s Guide...
  • Page 166 To configure the totalizer to count on the falling edge (negative) or rising edge (positive) of the input signal, send the following command. SENSe:TOTalize:SLOPe {NEG|POS} ,[(@<ch_list>)] To immediately clear the count on the specified totalizer channel (whether scanning or not), send the following command. SENSe:TOTalize:CLEar:IMMediate [(@<ch_list>)] Keysight 34970A/34972A User’s Guide...

  • Page 167: Digital Output Operations

    To cancel an output operation in progress, wait for the display to time out. From the front-panel only, you can specify whether you want to use binary or decimal format. USE DECIMAL , USE BINARY Keysight 34970A/34972A User’s Guide...
  • Page 168 You must specify a decimal value (binary data is not accepted). If you are going to read both ports simultaneously, you must send the command to port 01. Write to port 02 SOUR:DIG:DATA:BYTE 10 ,(@302) Write to both ports SOUR:DIG:DATA:WORD 10327 ,(@301) Keysight 34970A/34972A User’s Guide...

  • Page 169: Dac Output Operations

    – Front-Panel Operation: After selecting the desired DAC, press to edit the output voltage. Press again to output the specified voltage from the DAC channel. – Remote Interface Operation: The following command outputs +2.5 VDC from the DAC on channel 05. SOURCE:VOLT 2.5,(@305) Keysight 34970A/34972A User’s Guide...

  • Page 170: System-Related Operations

    “0”). You can name a location from the front panel or over the remote interface but you can only recall a named state from the front panel. From the remote interface, you can only recall a stored state using a number (0 through Keysight 34970A/34972A User’s Guide...
  • Page 171 From the remote interface, you can only recall a stored state using a number (0 through 5). MEM:STATE:NAME 1,TEST_RACK_1 To configure the instrument to automatically issue a Factory Reset (*RST command) when power is restored, send the following command. MEMory:STATe:RECall:AUTO OFF Keysight 34970A/34972A User’s Guide...

  • Page 172: Error Conditions

    The instrument beeps once each time an error is generated. – If more than 10 errors (34970A) or 20 errors (34972A) have occurred, the last error stored in the queue (the most recent error) is replaced with “Error queue overflow”.

  • Page 173: Self-Test

    – If the complete self-test is successful, PASS is displayed on the front panel. If the self-test fails, FAIL is displayed and the ERROR annunciator turns on. See the 34970A/34972A Service Guide for instructions on returning the instrument to Keysight for service.

  • Page 174: Display Control

    The following command displays a message on the front panel and turns on the display if disabled. DISP:TEXT ’SCANNING ...’ To clear the message displayed on the front panel (without changing the display state), send the following command. DISPLAY:TEXT:CLEAR Keysight 34970A/34972A User’s Guide...

  • Page 175: Real-Time System Clock

    DMM, the instrument issues a Factory Reset (*RST command). – A Factory Reset (*RST command) or Instrument Preset (SYSTem: PRESet command) does not affect the internal DMM configuration. – Front-Panel Operation: DMM ENABLED , DMM DISABLED – Remote Interface Operation: INSTrument:DMM {OFF|ON} Keysight 34970A/34972A User’s Guide...

  • Page 176: Firmware Revision Query

    Keysight Technologies,34970A,0,X.X-Y.Y-Z.Z Keysight Technologies,34972A,0,I.II-O.OO-FP-FPGA See the Keysight 34970A/34972A Programmer’s Reference Help for details. Use the following command to read the firmware revision number of the module in the specified slot (be sure to dimension a string variable with at least 30 characters).

  • Page 177: Relay Cycle Count

    To read the “hidden” backplane and bank relays, turn the knob clockwise beyond the highest numbered channel in the current slot. RELAY CYCLES Keysight 34970A/34972A User’s Guide...
  • Page 178 DMM (all three relays) or the specified module channels, send the following commands. DIAG:DMM:CYCLES? DIAG:RELAY:CYCLES? (@305,399) To clear the count on either the specified internal DMM relay or the specified module channels (the instrument must be unsecured), send the following commands. DIAG:DMM:CYCLES:CLEAR 2 DIAG:RELAY:CYCLES:CLEAR (@305,399) Keysight 34970A/34972A User’s Guide...

  • Page 179: Single-Channel Monitoring

    The monitored channel can be part of the scan list but you can also use a channel on the multifunction module (which does not have to be part of the scan list and you do not have to use the Monitor function). Keysight 34970A/34972A User’s Guide...

  • Page 180: Scpi Language Version Query

    – The following command returns the SCPI version. SYSTem:VERSion? Returns a string in the form “YYYY.V”, where “YYYY” represents the year of the version, and “V” represents a version number for that year (for example, 1994.0). Keysight 34970A/34972A User’s Guide...

  • Page 181: Mass Memory (Usb) Subsystem - 34972A

    There are two annunciators related to the USB drive: MEM (on) - Indicates that a USB drive is connected to the 34972A. MEM (flashing) - Indicates the the USB drive is either streaming data to USB (logging), copying from reading memory to USB (exporting), or importing a configuration from Keysight BenchLink Data Logger.
  • Page 182 4 Management of files on the USB drive via File Transfer Protocol (FTP). You would typically use FTP to download and delete files from the USB drive attached to the 34972A. A typical FTP session is shown below. – Remote Interface Operation: The FTP status is OFF by default. To enable FTP, send the following command.

  • Page 183: Scpi Commands

    – MMEMory:EXPort? – MMEMory:IMPort:CONFiguration? "<configuration_file>" – MMEMory:IMPort:CATalog? For more information on the SCPI commands available to program the instrument over the remote interface, see the MMEMory commands in the Keysight 34970A/ 34972A Programmer’s Reference Help. Folder and file structure Folder description...
  • Page 184 Note that some spreadsheet or data analysis software may import the data more easily if you change the extension from csv to txt. If your software does not import the file correctly, try changing the extension on the data file. Keysight 34970A/34972A User’s Guide...

  • Page 185: Contents Of Data Files

    34908A 40-channel, 1-wire armature multiplexer The format for all USB data files is similar to what Keysight BenchLink Data Logger produces by default. The default field separator is a comma, but you can use the following command to specify a different separator.
  • Page 186 Thus, the first scan in the second data file would be number 65,536, the first scan in the third data file would be number 131,071, and so on. Keysight 34970A/34972A User’s Guide...

  • Page 187: Usb Drive Front Panel - 34972A

    181. For more information on the SCPI commands available to configure the USB drive over the remote interface, see the MMEMory Subsystem in hte Keysight 34970A/34972A Programmer’s Reference Help. Setting up automatic logging You can set up the USB drive for automatic logging of readings.

  • Page 188: Importing An Instrument Configuration

    Features and Functions Importing an instrument configuration You can import an instrument configuration stored in an Keysight BenchLink Data Logger configuration (BLCFG) file in the root directory of your USB drive. – Front-Panel Operation: IMPORT CONFIG Keysight 34970A/34972A User’s Guide...

  • Page 189: Remote Interface Configuration - 34970A

    For more information on configuring the instrument from the front panel, see “To Configure the Remote Interface” starting on page 68. For more information on the SCPI commands available to program the instrument over the remote interface, see the Keysight 34970A/34972A Programmer’s Reference Help. GPIB address Each device on the GPIB (IEEE-488) interface must have a unique address.

  • Page 190: Remote Interface Selection

    – The baud rate selection is stored in non-volatile memory, and does not change when power has been off, after a Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command). – Front-Panel Operation: 19200 BAUD Keysight 34970A/34972A User’s Guide...

  • Page 191: Parity Selection (Rs-232)

    – The parity selection is stored in non-volatile memory, and does not change when power has been off, after a Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command). – Front-Panel Operation: EVEN, 7 BITS Keysight 34970A/34972A User’s Guide...

  • Page 192: Flow Control Selection (Rs-232)

    When the line goes false, the instrument stops sending information (typically within six characters). The instrument sets the RTS line false when the input buffer is almost full (approximately 100 characters) and releases the line when space is available again. Keysight 34970A/34972A User’s Guide...
  • Page 193 – The flow control selection is stored in non-volatile memory, and does not change when power has been off, after a Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command). – Front-Panel Operation: FLOW RTS/CTS Keysight 34970A/34972A User’s Guide...

  • Page 194: Remote Interface Configuration - 34972A

    “To Configure the Remote Interface” starting on page 68. For more information on the SCPI commands available to program the instrument over the remote interface, see the Keysight 34970A/34972A Programmer’s Reference Help. All of these menu items are accessed under the top-level menu:...

  • Page 195: Enabling And Disabling Dhcp

    – Front-Panel Operation: DHCP ENABLED/DISABLED Setting the IP address You can set the IP address for your 34972A. This menu option assigns the static IP address for the instrument. You must disable DHCP in order to set this on the front panel.

  • Page 196: Setting The Subnet Mask

    If DHCP is available and enabled, DHCP will auto-assign the DNS address. This auto-assigned DNS address takes precedence over the static DNS address assigned with this menu option. You must disable DHCP in order to set this on the front panel. – Front-Panel Operation: DNS SERVER Keysight 34970A/34972A User’s Guide...

  • Page 197: Viewing The Mac Address

    Features and Functions Viewing the MAC address You can view the MAC address of your 34972A. This address is of the form ##:##:##:##:##:##, where each # is a hexadecimal digit (0-9 or A-F). The LAN relies on every device attached to the network having a unique MAC address. The MAC address for each instrument is set at the factory and cannot be changed.

  • Page 198: Calibration Overview

    If you forget your security code, you can disable the security feature by adding a jumper inside the instrument. See the 34970A/34972A Service Guide for more information. – The security code is set to either “KT034970” or “KT034972”, depending on the product number, when the instrument is shipped from the factory.
  • Page 199 If you enter the wrong secure code, NO MATCH is displayed and a new choice, NOTE EXIT, is shown. – Remote Interface Operation: To unsecure the instrument, send the following command with the correct security code. CAL:SECURE:STATE OFF,KT034970 Keysight 34970A/34972A User’s Guide...
  • Page 200 – Remote Interface Operation: To change the security code, first unsecure the instrument using the old security code. Then, enter the new code as shown below. Unsecure with old code CAL:SECURE:STATE OFF, KT034970 Enter new code CAL:SECURE:CODE ZZ007943 Keysight 34970A/34972A User’s Guide...

  • Page 201: Calibration Message

    Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command). – Front-Panel Operation: CAL MESSAGE – Remote Interface Operation: To store the calibration message, send the following command. CAL:STRING ’CAL: 06-01-98’ Keysight 34970A/34972A User’s Guide...

  • Page 202: Calibration Count

    – The calibration count is also incremented with calibrations of the DAC channels on the multifunction module. – Front-Panel Operation: CAL COUNT – Remote Interface Operation: CALibration:COUNt? Keysight 34970A/34972A User’s Guide...

  • Page 203: Factory Reset State

    Factory Reset State Alarm Queue Not Cleared Alarm State HI and LO Alarm Limits Alarm Output Alarm 1 Alarm Output Configuration Latched Mode Alarm Output State Output Lines are Cleared Alarm Output Slope Fail = Low Keysight 34970A/34972A User’s Guide...
  • Page 204 Channels s11 and s21 Selected 34905A, 34906A Both DIO Ports = Input, 34907A Totalizer Count = 0, Both DACs = 0 VDC System-Related Operations Factory Reset State Display State Error Queue Errors Not Cleared Stored States No Change Keysight 34970A/34972A User’s Guide...

  • Page 205: Instrument Preset State

    Alarm Limits Instrument Preset State Alarm Queue No Change Alarm State No Change HI and LO Alarm Limits No Change Alarm Output Configuration No Change Alarm Output State Output Lines are Cleared Alarm Output Slope No Change Keysight 34970A/34972A User’s Guide...
  • Page 206 Channels s11 and s21 Selected 34905A, 34906A Both DIO Ports = Input, Totalizer Count = 0, Both 34907A DACs = 0 VDC System-Related Operations Instrument Preset State Display State No Change Error Queue Errors Not Cleared Stored States No Change Keysight 34970A/34972A User’s Guide...

  • Page 207: Multiplexer Module Default Settings

    10 MΩ (fixed for all DCV ranges) AC Low Frequency Filter 20 Hz (medium) Channel Delay Automatic Delay Resistance Measurements Defaul t Setting Range Autorange Resolution 5½ digits Integration Time 1 PLC Offset Compensation Channel Delay Automatic Delay Keysight 34970A/34972A User’s Guide...
  • Page 208 AC Low Frequency Filter 20 Hz (medium) Channel Delay Automatic Delay Current Measurements Defaul t Setting Range Autorange Resolution 5½ digits Integration Time 1 PLC AC Low Frequency Filter 20 Hz (medium) Channel Delay Automatic Delay Keysight 34970A/34972A User’s Guide...

  • Page 209: Module Overview

    “34902A 16-Channel Multiplexer” on page 213 “34903A 20-Channel Actuator” on page 216 “34904A 4x8 Matrix Switch” on page 219 “34905A/6A Dual 4-Channel RF Multiplexers” on page 222 “” on page 223 “34908A 40-Channel Single-Ended Multiplexer” on page 227 Keysight 34970A/34972A User’s Guide...

  • Page 210: 34901A 20-Channel Multiplexer

    Do not mount, move, or remove any thermocouples when the device under test is connected to a supply source. Keysight 34970A/34972A User’s Guide...
  • Page 211 If any channels are configured to be part of the scan list, you cannot close multiple channels; closing one channel will open the previously closed channel. Connections to AC line are not recommended unless you provide external transient suppression. Keysight 34970A/34972A User’s Guide...
  • Page 212 Maximum Switching Power: 50 W WARNING: To prevent electrical shock, use only wire that is rated for the highest voltage applied to any channel. Before removing a module cover, turn off all power to external devices connected to the module. Keysight 34970A/34972A User’s Guide...

  • Page 213: 34902A 16-Channel Multiplexer

    – Current measurements on this module will require external shunt resistors. – Connections to AC line are not recommended unless you provide external transient suppression. Keysight 34970A/34972A User’s Guide...
  • Page 214 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...
  • Page 215 Maximum Switching Power: 2 W WARNING: To prevent electrical shock, use only wire that is rated for the highest voltage applied to any channel. Before removing a module cover, turn off all power to external devices connected to the module. Keysight 34970A/34972A User’s Guide...

  • Page 216: 34903A 20-Channel Actuator

    NOTE – The channel CLOSE and OPEN commands control the state of the Normally Open (NO) to COM connection on each channel. For example, CLOSE 201 connects the Normally Open contact to COM on channel 01. Keysight 34970A/34972A User’s Guide...
  • Page 217 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...
  • Page 218 Maximum Switching Power: 50 W WARNING: To prevent electrical shock, use only wire that is rated for the highest voltage applied to any channel. Before removing a module cover, turn off all power to external devices connected to the module. Keysight 34970A/34972A User’s Guide...

  • Page 219: 34904A 4X8 Matrix Switch

    2 as shown below. Col 1 Col 2 Col 8 Row 1 Row 2 Row 3 Row 4 Channel 32 (Row 3, Column 2) You can close multiple channels at the same time on this module. NOTE Keysight 34970A/34972A User’s Guide...
  • Page 220 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...
  • Page 221 Maximum Switching Power: 50 W WARNING: To prevent electrical shock, use only wire that is rated for the highest voltage applied to any channel. Before removing a module cover, turn off all power to external devices connected to the module. Keysight 34970A/34972A User’s Guide...

  • Page 222: 34905A/6A Dual 4-Channel Rf Multiplexers

    COM. – This module responds only to the CLOSE command (OPEN does not apply). To OPEN a channel, send the CLOSE command to another channel in the same bank. Keysight 34970A/34972A User’s Guide...
  • Page 223 Maximum Switching Power: 20 W Ten color-coded cables are included with the module. To order additional cables, use the following cable kit part numbers (10 cables are included): 34905-60001 (50Ω cables) 34906-60001 (75Ω cables) SMB-to-BNC Cable Keysight 34970A/34972A User’s Guide...
  • Page 224 ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...

  • Page 225: 34907A Multifunction Module

    ±12 volts with 16 bits of resolution. Each DAC channel is capable of 10 mA maximum current. You must limit the DAC output DAC 2 Channel 05 current to 40 mA total for all three slots (six DAC channels). Keysight 34970A/34972A User’s Guide...
  • Page 226 Vin(H) Max: <42V with external open-drain pull-up Totalizer: Maximum Count: 67,108,863 (226 - 1) Totalize Input: 100 kHz (max) Signal Level: 1 Vp-p (min), 42 Vpk (max) DAC Output: ±12V, non-isolated lout: 10 mA max per DAC; 40 mA max per mainframe Keysight 34970A/34972A User’s Guide...

  • Page 227: 34908A 40-Channel Single-Ended Multiplexer

    LO configuration), be sure to provide electrical isolation between thermocouples to avoid current loops and subsequent measurement errors. – Connections to AC line are not recommended unless you provide external transient Keysight 34970A/34972A User’s Guide...
  • Page 228 Do not mount, move, or remove any thermocouples when the device under test is connected to a supply source. Keysight 34970A/34972A User’s Guide...
  • Page 229 Features and Functions ENVIRONMENTAL HEALTH AND SAFETY WARNING When any channel is connected to a hazardous vol tage source, the instrument and the device under test should be supervised, following local EHS practices to restrict access. Keysight 34970A/34972A User’s Guide...
  • Page 230 Features and Functions WIRING LOG Slot Number: 100 200 300 Name Function Comments H COM L COM Keysight 34970A/34972A User’s Guide...
  • Page 231 Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Error Messages Error Messages Execution Errors Instrument Errors Self-Test Errors Calibration Errors Plug-In Module Errors...

  • Page 232: Error Messages

    The instrument beeps once each time an error is generated. – If more than 10 errors (34970A) or 20 errors (34972A) have occurred, the last error stored in the queue (the most recent error) is replaced with “Error queue overflow”.

  • Page 233: Execution Errors

    Fewer parameters were received than expected for this command. You have omitted one or more parameters that are required for this command. Example: ROUT:CHAN:DELAY -112 Program mnemonic too long A command header was received which contained more than the maximum 12 characters allowed. Example: CONFIGURATION:VOLT:DC Keysight 34970A/34972A User’s Guide...
  • Page 234 A header suffix is the number that can be appended to the end of some command headers. This error is generated if the header suffix contains more than 12 characters. -138 Suffix not allowed A parameter suffix was specified when one was not allowed. Keysight 34970A/34972A User’s Guide...
  • Page 235 Send an ABORt command or bus Device Clear to stop a scan in progress. -214 Trigger deadlock A trigger deadlock occurs when the trigger source is “BUS” and a READ? command is received. Keysight 34970A/34972A User’s Guide...
  • Page 236 The error queue is full because more than 10 errors (34970A) or 20 errors (34972A) have occurred. No additional errors are stored until you remove errors from the queue. The error queue is cleared by the *CLS (clear status) command or when power is cycled.
  • Page 237 Query UNTERMINATED after indefinite response The *IDN? command must be the last query command within a command string. The *IDN? command returns an indefinite length string which cannot be combined with any other query command. Example: *IDN?;*STB? Keysight 34970A/34972A User’s Guide...

  • Page 238: Instrument Errors

    (normally recalled when power is turned on) has become unusable. This error is most likely caused by a dead battery (memory is battery-backed). Refer to the 34970A/34972A Service Guide to replace the internal battery. Memory lost: stored read ings This error is reported at power-on to indicate that readings stored in memory from a previous scan have been lost.
  • Page 239 An invalid RTD or thermistor type has been specified. The following RTDs are supported: α = 0.00385 (“85”) and α = 0.00391 (“91”). The following thermistors are supported: 2.2 kΩ (“2252”), 5 kΩ (“5000”), and 10 kΩ (“10000”). Example: CONF:TEMP RTD,1,(@101) Keysight 34970A/34972A User’s Guide...
  • Page 240 Mod ule not able to perform requested operation A command was received which is not valid for the specified module. This error is most commonly generated when you send a command intended for the multifunction module to a switching module. Keysight 34970A/34972A User’s Guide...
  • Page 241 22 on the module in slot 200, and channels 21-22 on the module in slot 300. Mass storage error: failed to create file The file was not created on the USB drive. Mass storage error: failed to open file The file was not opened on the USB drive. Keysight 34970A/34972A User’s Guide...
  • Page 242 The file does not exist on the USB drive. Path not found The directory does not exist on the USB drive. File not opened for writing The instrument failed to open the file for writing on the USB drive. Keysight 34970A/34972A User’s Guide...
  • Page 243 Instrument is only able to capture 2^32 (~4.3 billion) sweeps worth of data on an external USB drive Memory lost: non-volatile settings; USB drive Data in non-volatile memory was lost or corrupted. USB logging enable, row limit and column separator will be set to defaults. Keysight 34970A/34972A User’s Guide...
  • Page 244 Configuration data will not be saved to the USB drive. One or more blcfg file names invalid; files inaccessible Keysight BenchLink Data Logger BLCFG configuration files on the USB drive are limited to 40 character filenames (including the .blcfg extension), and all characters must be ANSI.
  • Page 245 The instrument cannot store an overload reading (9.90000000E+37) as the offset for Mx+B scaling using a null measurement. Not able to execute command in local mode The instrument has received a READ? or MEASure? command while in the local mode. Keysight 34970A/34972A User’s Guide...

  • Page 246: Self-Test Errors

    Error Messages Self-Test Errors The following errors indicate failures that may occur during a self-test. Refer to the 34970A/34972A Service Guide for more information. Sel f-test: front panel not respond ing Sel f-test: RAM read/write Sel f-test: A/D sync stuck...
  • Page 247 Error Messages Sel f-test: not able to calibrate precharge Sel f-test: not able to sense line frequency Sel f-test: I/O processor not respond ing Sel f-test: I/O processor sel f-test Keysight 34970A/34972A User’s Guide...

  • Page 248: Calibration Errors

    Calibration Errors The following errors indicate failures that may occur during a calibration. Refer to the 34970A/34972A Service Guide for more information. Cal: security d isabled by jumper The calibration security feature has been disabled with a jumper inside the instrument.
  • Page 249 The following error messages indicate possible hard ware failures within the NOTE instrument. If any of the following errors occur, contact your nearest Keysight Service Center for repair. Cal: full scale correction out of range Cal: DCV offset out of range...
  • Page 250 Cal data lost: FRES corrections Cal data lost: AC corrections Config data lost: HP-IB address (34970A only) Calibration failed (34972A only) Config data lost: RS-232 (34970A only) Cal checksum failed internal data (34972A only) DMM relay count data lost Keysight 34970A/34972A User’s Guide...

  • Page 251: Plug-In Module Errors

    Plug-In Module Errors The following error messages indicate possible hard ware failures within the NOTE instrument. If any of the following errors occur, contact your nearest Keysight Service Center for repair. Mod ule hard ware: unexpected data received Mod ule hard ware: missing stop bit...
  • Page 252 Error Messages THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 34970A/34972A User’s Guide...
  • Page 253 Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Application Programs Application Programs Example Programs for Excel 7.0 Example Programs for C and C++...

  • Page 254: Application Programs

    These programs were written for the 34970A, but other than the connectivity, the principles and code should generally apply to the 34972A as well. For programs specific to the 34972A, see the product page at www.keysight.com/find/34972A...

  • Page 255: Example Programs For Excel 7.0

    Example Programs for Excel 7.0 This section contains two example programs written using Excel macros (Visual Basic® for Applications) to control the 34970A/34972A. Using Excel, you can send SCPI commands to configure the instrument and then record measurement data on the Excel spreadsheet.

  • Page 256: Excel 7.0 Example: Takereadings Macro

    ’ Start the readings and wait for instrument to put ’ one reading in memory SendSCPI "DATA:POINTS?" ’ Get the number of readings stored points = Val(getScpi()) Loop Until points >= 1 ’ Remove one reading at a time from memory Continued on next page Keysight 34970A/34972A User’s Guide...
  • Page 257 ’ Wait for instrument to put another reading in memory SendSCPI "DATA:POINTS?" ’ Get the number of readings stored points = Val(getScpi()) Loop Until points >= 1 Or I >= numberMeasurements Next I ClosePort ’ Close communications on GPIB End Sub Keysight 34970A/34972A User’s Guide...

  • Page 258: Excel 7.0 Example: Port Configuration Macro

    ’ c:\windows\system directory on your PC. This routine uses the VTL Library to send ’ commands to the instrument. A description of these and additional VTL commands can be ’ found in the Keysight VISA User’s Guide. ’""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Public Sub SendSCPI(SCPICmd As String) ’...
  • Page 259 ’ This subroutine is used to create delays. The input is in seconds and ’ fractional seconds are allowed. ’"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Sub delay(delay_time As Single) Dim Finish As Single Finish = Timer + delay_time Loop Until Finish <= Timer End Sub Keysight 34970A/34972A User’s Guide...

  • Page 260: Excel 7.0 Example: Scanchannels Macro

    ’ Configure channel 101 for temperature SendSCPI "CONF:TEMP TC,K,(@102)" ’ Configure channel 102 for temperature SendSCPI "CONF:TEMP THER,5000,(@103)" ’ Configure channel 103 for temperature SendSCPI "CONF:VOLT:DC (@110,111,112)" ’ Configure three channels for DC volts ’""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Continued on next page Keysight 34970A/34972A User’s Guide...
  • Page 261 SendSCPI "DATA:POINTS?" ’ Get the number of readings stored points = Val(GetSCPI()) Loop Until points >= 1 Or Channel >= numberChannels Next Channel Next columnIndex ClosePort ’ Close communications on GPIB End Sub Continued on next page Keysight 34970A/34972A User’s Guide...
  • Page 262 ’ Call this routine to check for instrument errors. The GPIB address variable ’ ’VISAaddr’ must be set. Dim DataString As String OpenPort SendSCPI "SYSTEM:ERROR?" ’ Read one error from the error queue Delay (0.1) DataString = GetSCPI() MsgBox DataString ClosePort End Sub Keysight 34970A/34972A User’s Guide...

  • Page 263: Example Programs For C And C

    Example Programs for C and C++ The following C programming examples show you how to send and receive formatted I/O. For more information on non-formatted I/O, refer to the Keysight VISA User’s Guide. The examples in this section show you how to use the SCPI commands for the instrument with the VISA functionality and does not include error trapping.

  • Page 264: C/C++ Example: Dac_Out.c

    /* Set power-on condition */ voltage = 5; /* Set variable to voltage setting */ viPrintf (dac, "SOURCE:VOLTAGE %f,(@205)\n",voltage); /* Set output voltage */ /* Close communication session */ viClose (dac); viClose (defaultRM); Continued on next page Keysight 34970A/34972A User’s Guide...

  • Page 265: C/C++ Example: Stat_Reg.c

    Set the alarm and set SRQ if the voltage is greater than 5 volts.*/ viPrintf (DataAcqu, "CONF:VOLT:DC 10,(@103)\n"); viPrintf (DataAcqu, "TRIG:SOURCE TIMER\n"); viPrintf (DataAcqu, "TRIG:TIMER 1\n"); viPrintf (DataAcqu, "TRIG:COUNT 10\n"); viPrintf (DataAcqu, "CALC:LIMIT:UPPER 5,(@103)\n"); viPrintf (DataAcqu, "CALC:LIMIT:UPPER:STATE ON,(@103)\n"); viPrintf (DataAcqu, "OUTPUT:ALARM1:SOURCE (@103)\n"); viPrintf (DataAcqu, "INIT;*OPC\n"); Keysight 34970A/34972A User’s Guide...
  • Page 266 = %s\n",reply_string); if ((statusByte==96)|(statusByte==98)){ srqFlag = -1; /* Set flag to indicate end of operation */ viPrintf (DataAcqu,"*ESR?\n"); /* Check and clear ESR bit */ viScanf(DataAcqu,"%s",&reply_string); printf("Standard Event Register; bit %s\n",reply_string); return VI_SUCCESS; Keysight 34970A/34972A User’s Guide...

  • Page 267: Tutorial

    This chapter describes methods that you can use to reduce errors that can affect your measurements. You will also find information to help you better understand how the 34970A/34972A makes measurements and what you can do to get the best results.

  • Page 268: System Cabling And Connections

    The following table lists typical cable resistance for copper wire of several gauge sizes (the temperature coefficient for copper wire is 0.35% per °C). Keysight 34970A/34972A User’s Guide...
  • Page 269 30 mΩ 50 mΩ [a] Recommended wire size for the screw terminals on 34970A/34972A plug-in modules. – Cable Capacitance – Varies with the insulation type, cable length, and cable shielding. Cables should be kept as short as possible to minimize cable capacitance.

  • Page 270: Grounding Techniques

    1/20 of a wavelength. In all cases, return-path resistance and inductance should be minimized. Circuit A Circuit B Circuit C Circuit A Circuit B Circuit C Single-Point Ground Circuit A Circuit B Circuit C Parallel Grounds Separate Grounds Keysight 34970A/34972A User’s Guide...

  • Page 271: Shielding Techniques

    All unused lines should be grounded (or tied to LO) and placed between sensitive signal paths. When making your wiring connections to the screw terminals on the module, be sure to wire like functions on adjacent channels. Keysight 34970A/34972A User’s Guide...

  • Page 272: Sources Of System Cabling Errors

    You should take the necessary precautions to minimize thermocouple voltages and temperature variations in low-level voltage measurements. The best connections are formed using copper-to-copper crimped connections. The table below shows common thermoelectric voltages for connections between dissimilar metals. Keysight 34970A/34972A User’s Guide...
  • Page 273 As shown below, any voltage difference between the two ground reference points (V ) causes a current to flow through the LO measurement ground lead. This causes an error voltage (V ) which is added to the measured voltage. Keysight 34970A/34972A User’s Guide...
  • Page 274 R ground – If V is an AC voltage, keep R small compared to Z, and set the DMM’s ground integration time to 1 PLC or greater (see page 133 for a discussion of integration time). Keysight 34970A/34972A User’s Guide...
  • Page 275 It is possible that high-level charged voltages may be discharged onto a low-level channel. It is recommended that you either use two different modules or separate the high-level signals from the low-level signals with an unused channel connected to ground. Keysight 34970A/34972A User’s Guide...

  • Page 276: Measurement Fundamentals

    Tutorial Measurement Fundamentals This section explains how the 34970A/34972A makes measurements and discusses the most common sources of error related to these measurements. The Internal DMM The internal DMM provides a universal input front-end for measuring a variety of transducer types without the need for additional external signal conditioning. The internal DMM includes signal conditioning, amplification (or attenuation), and a high resolution (up to 22 bits) analog-to-digital converter.
  • Page 277 The following graph shows the attenuation of AC signals measured in the DC voltage function for various A/D integration time settings. Note that signal frequencies at multiples of 1/T exhibit high attenuation. 0 dB -10 dB -20 dB -30 dB -40 dB Signal Frequency x T Keysight 34970A/34972A User’s Guide...

  • Page 278: Temperature Measurements

    6 μV/°C to 60 μV/°C ≈ 400Ω /°C Probe Accuracy 0.5°C to 5°C 0.1°C to 1°C 0.01°C to 0.1°C Cost (U.S. Dollars) $1 / foot $10 to $100 each $20 to $100 each Durability Rugged Fragile Fragile Keysight 34970A/34972A User’s Guide...
  • Page 279 An RTD has the highest stability of the temperature transducers. The output from an RTD is also very linear. This makes an RTD a good choice for high-accuracy, long-term measurements. The 34970A/34972A supports RTDs with α = 0.00385 (DIN / IEC 751) using ITS-90 software conversions and α = 0.00391 using IPTS-68 software conversions.
  • Page 280 T-type thermocouple can be calculated. One way to do this is to connect two T-type thermocouples together to create only copper-to-copper connections at the internal DMM’s input terminals, and to hold the second thermocouple at a known temperature. Keysight 34970A/34972A User’s Guide...
  • Page 281 DMM’s copper (Cu) input terminals. Since these two junctions will generate opposing voltages, their effect will be to cancel each other. However, if the input terminals are not at the same temperature, an error will be created in the measurement. Keysight 34970A/34972A User’s Guide...
  • Page 282 Removing the reference thermocouple makes the connections much easier. Internal DMM Measurement Thermocouple Ice Bath (External Reference Junction) This circuit is the best solution for accurate thermocouple connections. Keysight 34970A/34972A User’s Guide...
  • Page 283 Thermocouples are available in a variety of types. The type is specified by a single letter. The table on the following page shows the most commonly used thermocouple types and some key characteristics of each. The thermocouple conversion routines used by the 34970A/34972A are NOTE compatible with the International Temperature Scale of 1990 (ITS-90).
  • Page 284 -200°C - 400°C ±0.5°C - 1°C Brown Low temperature Japanese White applications. French Yellow Blue Nickel-Chromium Constantan U.S. Purple British Brown Blue Highest output voltage. -200°C - ±1°C - 1.7°C 1000°C Black Highest resolution. Japanese White French Yellow Blue Keysight 34970A/34972A User’s Guide...
  • Page 285 White Blue ±0.6°C - -50°C - 1760°C Beware of contamination. 1.5°C White Do not insert in Japanese White metal tubes. French Yellow Green Constantan = Copper-Nickel; Nicrosil = Nickel-Chromium-Silicon; Nisil = Nickel-Silicone-Magnesium; N/A = Not Available Keysight 34970A/34972A User’s Guide...

  • Page 286: Sources Of Error In Thermocouple Measurements

    Open thermocouple junctions can be detected by checking the resistance of the thermocouple. A resistance measurement of more than 5 kΩ. typically indicates a defective thermocouple. The 34970A/34972A contains a built-in, automatic thermocouple check feature. If you enable this feature, the instrument measures the channel resistance after each thermocouple measurement to ensure a proper connection.
  • Page 287 Power Line WITH SHIELD Common mode noise can dramatically affect the internal DMM. A typical thermocouple output is a few millivolts and a few millivolts of common mode noise can overload the input to the internal DMM. Keysight 34970A/34972A User’s Guide...

  • Page 288: Dc Voltage Measurements

    100:1 before being applied to the input amplifier. The input amplifier gain is set to one of three values (x1, x10, or x100) to yield a signal in the range of ±12 VDC for the analog-to-digital converter. Keysight 34970A/34972A User’s Guide...

  • Page 289: Sources Of Error In Dc Voltage Measurements

    (50 Hz or 60 Hz), the noise can be greatly reduced by setting the internal DMM’s integration time to 1 PLC or greater (see page 133 for a discussion of integration time). Keysight 34970A/34972A User’s Guide...
  • Page 290 Tutorial test »C 250 pF >10 GW Where: = Common mode float voltage = LO lead resistance = Isolation resistance = Isolation capacitance = Parallel impedance of R × Error (V ----------------- - R s Z Keysight 34970A/34972A User’s Guide...
  • Page 291 Connection B The measurement noise caused by injected current can be significantly reduced by setting the integration time of the internal DMM to 1 PLC or greater (see page 133 for a discussion of integration time). Keysight 34970A/34972A User’s Guide...
  • Page 292 The effect of the input bias current is a loading error at the internal DMM’s input terminals. The leakage current will approximately double for every 10 °C temperature rise, thus making the problem much more apparent at higher temperatures. Keysight 34970A/34972A User’s Guide...
  • Page 293 Tutorial Where: = DMM bias current = DUT source resistance = Input resistance (10 MΩ or > 10 GΩ) = DMM input capacitance Error (V) = I Keysight 34970A/34972A User’s Guide...

  • Page 294: Ac Voltage Measurements

    An AC voltage front end similar to the one discussed above is also used to measure AC current. Shunt resistors convert the AC current into an AC voltage which can then be measured. Current shunts are switched to provide selectable AC current ranges. Keysight 34970A/34972A User’s Guide...
  • Page 295 You can determine this value by combining results from DC and AC measurements as shown below. You should perform the DC measurement using at least 10 power line cycles of integration (6½ digit mode) for best AC rejection. Keysight 34970A/34972A User’s Guide...
  • Page 296 20 Hz (Medium) AUTO 1 second 3 Hz (Slow) AUTO 7 seconds 200 Hz (Fast) 0.02 seconds 20 Hz (Medium) 0.2 seconds 3 Hz (Slow) 1.5 seconds DC blocking settling time (1 time constant) = 0.2 seconds. Keysight 34970A/34972A User’s Guide...

  • Page 297: Sources Of Error In Ac Voltage Measurements

    – Error ------------------------ - bandwidth 4π × Where: C.F. = Signal crest factor (see the table on page 295) F = Fundamental input signal frequency BW = DMM’s -3 dB bandwidth (1 MHz for the 34970A/34972A) Keysight 34970A/34972A User’s Guide...
  • Page 298 = ±(0.05% + 0.04%) = ±0.09% sine Error = 0.15% crest factor 20000 × – Error ---------------------------------------------------------- - * 100 = 1.4% bandwidth × 3.14159 × 1000000 Total Error = 0.09% + 0.15% + 1.4% = 1.6% Keysight 34970A/34972A User’s Guide...
  • Page 299 Error (%) = 100 x ----------------------------------------------------------------- - – 2π C in × × × F = Input frequency = Source resistance = Input capacitance (150 pF) + Cable capacitance Use low-capacitance cable when measuring high-frequency AC signals (see page 269). Keysight 34970A/34972A User’s Guide...
  • Page 300 Note that the measurement accuracy will be significantly different for the two cases. For highest accuracy, you should use manual ranging to select the lowest range possible for the measurement. Keysight 34970A/34972A User’s Guide...
  • Page 301 When manual ranging to a new range in an overload condition, the internal offset measurement may be degraded for the selected range. Typically, an additional 0.01% of range error may be introduced. This additional error will remain until the next periodic removal (typically 15 minutes). Keysight 34970A/34972A User’s Guide...

  • Page 302: Current Measurements

    DMM maintains DC continuity in the test circuit. Performing AC current measurements demands additional care. The burden voltage (loading) varies with frequency and input inductance, often causing unexpected behavior in the test circuit (see the discussion on the following page). Keysight 34970A/34972A User’s Guide...

  • Page 303: Sources Of Error In Dc Current Measurements

    DMM’s series inductance and the measurement connections. The burden voltage increases as the input frequency increases. Some circuits may oscillate when performing current measurements due to the internal DMM’s series inductance and the measurement connections. Keysight 34970A/34972A User’s Guide...

  • Page 304: Resistance Measurements

    The recommended connections for 4-wire ohms measurements are shown in the diagram on the following page. A constant current source, forcing current I through unknown resistance R, develops a voltage measured by a DC voltage front end. The unknown resistance is then calculated using Ohm’s Law. Keysight 34970A/34972A User’s Guide...
  • Page 305 10Ω and for high-accuracy requirements such as RTD temperature transducers. HI-Source HI-Sense test meter - - - - - - - - - - - - meter test LO-Sense LO-Source Keysight 34970A/34972A User’s Guide...
  • Page 306 Offset compensation can be used for 2-wire or 4-wire ohms measurements (but not for RTD or thermistor measurements). The 34970A/34972A disables offset compensation when the measurement function is changed or after a Factory Reset (*RST command). An Instrument Preset (SYSTem:PRESet command) or Card Reset (SYSTem:CPON command) does not change the setting.

  • Page 307: Sources Of Error In Resistance Measurements

    You may need to increase the channel delay time before a measurement in these situations (for more information on channel delay, see page 119). Keysight 34970A/34972A User’s Guide...

  • Page 308: Strain Gage Measurements

    (ε). Strain may be either tensile (+) or compressive (-). Practical strain values are usually quite small (typically less than 0.005 inch/inch for most metals) and are often expressed in micro-strains (με). There are three common types of strain measurements as shown below. Keysight 34970A/34972A User’s Guide...
  • Page 309 The Gage Factor (GF) indicates the sensitivity of a strain gage and is a measure of the fractional resistance change per strain: GF = (ΔR / R) / ε. Devices with a higher gage factor will exhibit a greater resistance change per strain applied. Keysight 34970A/34972A User’s Guide...
  • Page 310 Instruments with high-resolution resistance measuring capabilities, like the 34970A/34972A internal DMM, can directly measure small resistance changes with high precision and linearity. You should also use the 4-wire resistance method when measuring strain gages to eliminate system cabling errors.
  • Page 311 1.0 mΩ (0.5 με) Using the Mx+B scaling function with the equations shown below will allow you to display results directly in strain on the 34970A/34972A front-panel display. You can use a custom measurement label to display readings in “με” (micro-strain) directly.

  • Page 312: Frequency And Period Measurements

    0.1-second gate gives five digits, and so forth. 1st Edge Last Edge Input Gate Count Sources of Error in Frequency and Period Measurements The internal DMM’s AC voltage measurement section performs input signal conditioning. All frequency counters are susceptible to errors when measuring Keysight 34970A/34972A User’s Guide...
  • Page 313 3 mv Input Random Noise (RMS) If the external noise pickup becomes large enough to exceed the hysteresis of the measuring circuitry, the frequency function may actually become unusable. External shielding and low-pass filtering may help. Keysight 34970A/34972A User’s Guide...

  • Page 314: Low-Level Signal Multiplexing And Switching

    2. The instrument first closes the channel 1 relay, makes the voltage measurement, and then opens the relay before moving on to channel 2 (called break-before-make switching). Other low-level switching modules available with the 34970A/34972A include the following: – 34903A 20-Channel Actuator –...

  • Page 315: One-Wire (Single-Ended) Multiplexers

    283). To DMM Channel 1 Channel 2 Channel 3 Channel 4 Only one channel can be closed at a time; closing one channel will open the NOTE previously closed channel. Keysight 34970A/34972A User’s Guide...

  • Page 316: Two-Wire Multiplexers

    To DMM Channel 1 Channel 2 Channel 3 Channel 4 If any channels are configured to be part of the scan list, you cannot close NOTE multiple channels; closing one channel will open the previously closed channel. Keysight 34970A/34972A User’s Guide...

  • Page 317: Four-Wire Multiplexers

    When making a 4-wire measurement, the test current flows through the source connections from the HI terminal through the resistor being measured. To eliminate the test lead resistance, a separate set of sense connections are used as shown below. Keysight 34970A/34972A User’s Guide...

  • Page 318: Signal Routing And Multiplexing

    Note that a multiplexer is not directional. For example, you can use a multiplexer with a source (such as a DAC) to connect a single source to multiple test points as shown below. Multiplexer COM H Channel 1 COM L Channel 2 Channel 3 Channel 4 Keysight 34970A/34972A User’s Guide...

  • Page 319: Sources Of Error In Multiplexing And Switching

    The 34901A and 34902A multiplexers have an additional relay, called a bank switch or tree switch, which helps reduce channel-to- channel noise (C ). The multiplexer channels are divided into two banks. The bank switch isolates one Keysight 34970A/34972A User’s Guide...
  • Page 320 Module Bank 1 Bank 2 34901A Channels 1 through 10 Channels 11 through 20 34902Α Channels 1 through 8 Channels 9 through 16 34908A Channels 1 through 20 Channels 21 through 40 Keysight 34970A/34972A User’s Guide...

  • Page 321: Actuators And General-Purpose Switching

    (not connected to COM). Note that when the actuator channels are open, as shown above, the normally-closed contacts (not shown above) are connected to COM. Values from 10Ω to 50Ω are selected by closing the appropriate channel(s) on the module. Keysight 34970A/34972A User’s Guide...

  • Page 322: Snubber Circuits

    34903A, the maximum allowable relay current (I ) is 1A DC or AC rms. Thus, the minimum value for R is V/I , where V is the peak value of the supply voltage. - - - - - - - - Keysight 34970A/34972A User’s Guide...

  • Page 323: Using Varistors

    Once the circuit reaches the voltage rating of the varistor, the varistor’s resistance declines rapidly. A varistor can supplement an RC network and is especially useful when the required capacitance (C ) is too large. Keysight 34970A/34972A User’s Guide...

  • Page 324: Using Attenuators

    ±1%, 0.5 watt resistor can be installed in the R2 location. The resultant voltage drop (transducer current through the resistor) can be measured by the internal DMM. Thus, the 50Ω resistor converts the 4 to 20 mA current to a 0.2 to 1 volt signal. Keysight 34970A/34972A User’s Guide...

  • Page 325: Matrix Switching

    Any one of the signal sources can be connected to any one of the test inputs. Be aware that with a matrix, it is possible to connect more than one source at the same time. It is important to make sure that dangerous or unwanted conditions are not created by these connections. Keysight 34970A/34972A User’s Guide...

  • Page 326: Combining Matrices

    8-column matrix. An 8x8 matrix is shown below. Matrix Mod ule 1 Row 1 Row 4 Col 1 Col 8 8 Rows 8 Columns Col 1 Col 8 Row 1 Row 4 Matrix Mod ule 2 Keysight 34970A/34972A User’s Guide...

  • Page 327: Rf Signal Multiplexing

    These modules respond only to the CLOSE command (OPEN does not apply). To open a channel, send the CLOSE command to another channel in the same bank. Keysight 34970A/34972A User’s Guide...

  • Page 328: Sources Of Error In Rf Switching

    RF frequencies. Note that the 34905A and 34906A do not automatically terminate open channels. Insertion Loss (75Ω) Insertion Loss (50Ω) Direct to Module Using provided adapter cables VSWR (75Ω) VSWR (50Ω) Keysight 34970A/34972A User’s Guide...

  • Page 329: Multifunction Module

    +5V and is read as a “1”. An input shorted to ground is read as a “0”. An example of a contact closure detection channel is shown below. +5 V 10 kΩ I/O Line (1 of 8) +TTL Digital Read Reference (+2.1 V) Limit Switch Keysight 34970A/34972A User’s Guide...

  • Page 330: Digital Output

    – For non-TTL logic you must provide an external pull-up. A description of the pull-up calculation is given on the following page. – If used with an external power supply and pull-up, the external supply must be greater than +5 VDC and less than +42 VDC. Keysight 34970A/34972A User’s Guide...

  • Page 331: Using An External Pull-Up

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - = 12 x = 8.47 VDC --------------------------------------- high 24 kΩ 10 kΩ external external Keysight 34970A/34972A User’s Guide...

  • Page 332: Driving External Switches

    Driving External Switches You can use two digital output channels to control an external switch. For example, you can drive the Keysight 876X series of microwave switches using an external power supply and two digital output channels. The state of the 2-to-1 multiplexer is changed by setting the appropriate output bit low (0).

  • Page 333: Totalizer

    (factory setting) to detect changes through TTL threshold levels. 2.5 V Threshold (TTL) 0 V Threshold (AC) – The maximum count is 67,108,863 (2 -1). The count rolls over to “0” after reaching the maximum allowed value. Keysight 34970A/34972A User’s Guide...

  • Page 334: Totalizer Errors

    268. – Contact bounce on external switches can create false counts. All mechanical switches bounce when they open and close. Use an external capacitor to filter the contact bounce. Keysight 34970A/34972A User’s Guide...

  • Page 335: Voltage (Dac) Output

    You must limit the output current to 40 mA total for all three slots (six DAC NOTE channels). – To maintain the rated output accuracy, the load (R in the diagram shown above) must be greater than 1 kΩ. Keysight 34970A/34972A User’s Guide...

  • Page 336: Dac Errors

    The step size is 1 mV. – Integral Error refers to the difference between the programmed voltage and the actual output voltage from the DAC. This error is included in the output specifications shown in Chapter Differential Error Integral Error programmed Keysight 34970A/34972A User’s Guide...

  • Page 337: Relay Life And Preventive Maintenance

    Tutorial Relay Life and Preventive Maintenance The 34970A/34972A Relay Maintenance System automatically counts the cycles on each relay in the instrument and stores the total count in non-volatile memory on each switch module. Use this feature to track relay failures and predict system maintenance requirements.

  • Page 338: Relay Life

    For most applications, a relay with contact resistance greater than 1Ω should be replaced. The graph below shows the typical contact resistance characteristics of the relays used on the 34970A/34972A switching modules. Typical Relay Lifetime Full Load Typical Signals No Load 1Ω...

  • Page 339: Switching Frequency

    In both cases described above, you can use the 34970A/34972A Relay NOTE Maintenance System to track and even predict relay failures.
  • Page 340 Tutorial THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 34970A/34972A User’s Guide...

  • Page 341: Specifications

    Keysight 34970A/34972A Data Acquisition / Switch Unit User’s Guide Specifications For the characteristics and specifications of the 34970A/34972A Data Acquisition / Switch Unit, refer to the technical overview at http://literature.cdn.keysight.com/litweb/pdf/5965-5290EN.pdf...
  • Page 342 Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 34970A/34972A User’s Guide...
  • Page 343 4W annunciator, ALARM annunciator, 34905A module (50W) 50W RF switching Alarm key, channel numbering, 75W RF switching, alarm limits description, annunciators, module overview, clearing alarm outputs, simplified schematic, configuring, 34906A module (75W) ABORT command, default settings, Keysight 34970A/34972A User’s Guide...
  • Page 344 Alarms connector, binary format, digital read, capacitance, cable, alpha (a) for RTDs capacitive coupling, default, bits, vs. integration time, Card Reset key, values, block diagram carrying handle analog-to-digital conversion 34970A, adjusting, explanation, internal DMM, removing, integrating technique, Keysight 34970A/34972A User’s Guide...
  • Page 345 Default Gateway color codes, crosspoint switching, delay (channel delay), thermocouples, current measurements DHCP command syntax (SCPI) ac low frequency filter, dielectric withstand conventions, voltage, version query, ac settling time, differential error, (DAC), common LO multiplexers, burden voltage, Keysight 34970A/34972A User’s Guide...
  • Page 346 DTR/DSR flow mode front panel external reference (T/C), (RS-232), annunciators, external scanning Dynamic Host Configuration defining scan list, connections, Protocol layout, with digital channels, menu overview, external trigger front-panel display connector, Keysight 34970A/34972A User’s Guide...
  • Page 347 None (no flow mode), integration time junction temperature, RTS/CTS mode, definition, selecting, selecting, XON/XOFF mode, vs. channel delays, hardware output lines kelvins, setting units, vs. number of bits, (alarms), vs. number of digits, hardware, rack mounting, vs. resolution, Keysight 34970A/34972A User’s Guide...
  • Page 348 (RS-232), noise caused ground module description MAC Address loops, 34901A, magnetic field errors, noise rejection, normal 34902A, mainframe mode, 34903A, Keysight 34970A/34972A User’s Guide...
  • Page 349 34902A, radio frequency reading relay count, 34903A, interference, 34904A, random noise, remote interface, 34905A, range remote interface, GPIB (IEEE-488) 34906A, autorange, address selection, 34907A, overload, 34908A, selecting, cable, plug-in module information ranges by function interface selection, Keysight 34970A/34972A User’s Guide...
  • Page 350 Scan key, connector location, with Monitor function, scan list flow mode, with Mx+B scaling, adding channels to, parity, with totalizer channels, building from front selecting interface, SCPI language panel, RTD measurements, syntax conventions, Keysight 34970A/34972A User’s Guide...
  • Page 351 Check 34903A, strain relief, feature, 34904A, stress (strain gage), thermocouples 34905A, Subnet Mask calculation error, 34906A, sweep (scan), defined, color codes, 34907A, switch contact resistance, conversion accuracy, 34908A, switch life, diffusion error, single-channel Monitor, switch types Keysight 34970A/34972A User’s Guide...
  • Page 352 Visual Basic, example, maximum count, VM Complete signal, reset mode while voltage (DAC) output scanning, card reset, reset mode, current limitations, scanning, differential error, Totalize Threshold integral error, jumper, resetting, track mode, alarm output Keysight 34970A/34972A User’s Guide...
  • Page 353 This information is subject to change without notice. Always refer to the English version at the Keysight website for the latest revision. © Keysight Technologies 2009-2019 Edition 6, November 2019 Printed in Malaysia *34972-90001* 34972-90001 www.keysight.com Distributed by: Sie haben Fragen oder wünschen eine Beratung? Angebotsanfrage unter 07121 / 51 50 50 oder über info@datatec.de...

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