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Tektronix Keithley DMM7512 Applications Manual

7 1/2 digit multimeter
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Model DMM7510 7½ Digit Multimeter
Application Manual
DMM7510-904-01 Rev. D March 2021
*PDMM7510-904-01D*
DMM7510-904-01D

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  • Page 1 tek.com/keithley Model DMM7510 7½ Digit Multimeter Application Manual DMM7510-904-01 Rev. D March 2021 *PDMM7510-904-01D* DMM7510-904-01D...
  • Page 2 Model DMM7510 7½ Digit Multimeter Application Manual...
  • Page 3 © 2021, Keithley Instruments, LLC Cleveland, Ohio, U.S.A. All rights reserved. Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part, without the prior written approval of Keithley Instruments, LLC, is strictly prohibited. These are the original instructions in English. ®...
  • Page 4 Safety precautions The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
  • Page 5 For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired. Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

  • Page 6: Table Of Contents

    Table of contents Introduction ......................1-1 Welcome ..........................1-1 Introduction to this manual ....................1-1 Extended warranty ....................... 1-2 Contact information ......................1-2 Measuring dc voltage with high accuracy .............. 2-1 Introduction .......................... 2-1 Equipment required ......................2-1 Device connections ......................2-1 High-accuracy dc voltage measurements ................
  • Page 7 Table of contents Model DMM7510 7½ Digit Multimeter Application Manual Overview of the application ....................... 5-4 Using SCPI commands ......................5-5 Using TSP commands ......................5-6 Integrating with a Model 3706A-S using TSP-Link ..........6-1 Introduction .......................... 6-1 Equipment required ......................6-1 Device connections ......................

  • Page 8: Introduction

    Section 1 Introduction In this section: Welcome .................. 1-1 Introduction to this manual ............1-1 Extended warranty ..............1-2 Contact information ..............1-2 Welcome Thank you for choosing a Keithley Instruments product. The Keithley Instruments Model DMM7510 is a 7½ digit graphical sampling multimeter that expands standard DMM functions with high-speed digitizing and large graphical color touchscreen display.

  • Page 9: Extended Warranty

    If you have any questions after you review the information in this documentation, please contact your local Keithley Instruments office, sales partner, or distributor. You can also call the Tektronix corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For worldwide contact numbers, visit tek.com/contact-us.

  • Page 10: Measuring Dc Voltage With High Accuracy

    Section 2 Measuring dc voltage with high accuracy In this section: Introduction ................2-1 Equipment required ..............2-1 Device connections ..............2-1 High-accuracy dc voltage measurements ........ 2-3 Introduction This example application demonstrates how to use a DMM7510 to make a high-accuracy dc voltage measurement.
  • Page 11 Section 2: Measuring dc voltage with high accuracy Model DMM7510 7½ Digit Multimeter Application Manual Make sure power to the instrument is off and make the following connections: • Connect the test leads to the INPUT HI and LO terminals. •...

  • Page 12: High-Accuracy Dc Voltage Measurements

    Model DMM7510 7½ Digit Multimeter Application Manual Section 2: Measuring dc voltage with high accuracy To prevent electric shock, test connections must be configured such that the user cannot come in contact with test leads or any device under test (DUT) that is in contact with the conductors.

  • Page 13: Using The Front Panel

    Section 2: Measuring dc voltage with high accuracy Model DMM7510 7½ Digit Multimeter Application Manual Using the front panel Restart the instrument and select the function, integration rate, auto zero, and filter settings: 1. Press the POWER button on the front panel to turn on the instrument. 2.

  • Page 14: Using Scpi Commands

    Model DMM7510 7½ Digit Multimeter Application Manual Section 2: Measuring dc voltage with high accuracy Using SCPI commands This sequence of SCPI commands sets up and runs a single high-accuracy dc voltage measurement when a device under test is connected to the DMM7510 and controlled remotely. You may need to make changes so that this code will run in your programming environment.

  • Page 15: Test Results

    Section 2: Measuring dc voltage with high accuracy Model DMM7510 7½ Digit Multimeter Application Manual Send the following commands for this example application: -- Reset the instrument to the default settings. reset() -- Set the measure function to dc voltage. dmm.measure.func = dmm.FUNC_DC_VOLTAGE -- Set the measurement range to 10 V.

  • Page 16: Measuring 4-Wire Resistance With Offset Compensation

    Section 3 Measuring 4-wire resistance with offset compensation In this section: Introduction ................3-1 Equipment required ..............3-1 Device connections ..............3-2 Measuring 4-wire resistance with offset compensation .... 3-4 Introduction This application example demonstrates how to use the DMM7510 to accurately measure a resistance device.

  • Page 17: Device Connections

    Section 3: Measuring 4-wire resistance with offset compensation Model DMM7510 7½ Digit Multimeter Application Manual Device connections You can use either the front-panel or the rear-panel terminals for this application. The following figures show the physical connections for the front and rear panels. Note that you must use either the front terminals or the rear terminals.
  • Page 18 Model DMM7510 7½ Digit Multimeter Application Manual Section 3: Measuring 4-wire resistance with offset compensation Figure 3: Front-panel connections for 4-wire resistance measurements Figure 4: Rear-panel connections for 4-wire resistance measurements DMM7510-904-01 Rev. D March 2021...

  • Page 19: Measuring 4-Wire Resistance With Offset Compensation

    Section 3: Measuring 4-wire resistance with offset compensation Model DMM7510 7½ Digit Multimeter Application Manual Measuring 4-wire resistance with offset compensation This application demonstrates how to use the DMM7510 to measure the resistance of a device or component. You can make this measurement from the DMM7510 front panel or over the remote interface using SCPI code or TSP code.

  • Page 20: Using Scpi Commands

    Model DMM7510 7½ Digit Multimeter Application Manual Section 3: Measuring 4-wire resistance with offset compensation Using SCPI commands This sequence of SCPI commands measures the resistance of a device or component. The device under test is connected to the DMM7510 and controlled remotely. You may need to make changes so that this code will run in your programming environment.

  • Page 21: Test Results

    Section 3: Measuring 4-wire resistance with offset compensation Model DMM7510 7½ Digit Multimeter Application Manual Send the following commands for this example application: -- Reset the Model DMM7510 to the default settings. reset() -- Set the measure function to 4-wire resistance. dmm.measure.func = dmm.FUNC_4W_RESISTANCE -- Enable autorange.

  • Page 22: Sampling Temperature At A Set Time Interval

    Equipment required • One DMM7510 • 100 Ω RTD temperature probe (such as Tektronix TP750) • One computer set up for remote communication with the DMM7510 Device connections Use of a four-wire resistance temperature detector (RTD) reduces the effects of lead resistance on accuracy and provides high stability.
  • Page 23 Section 4: Sampling temperature at a set time interval Model DMM7510 7½ Digit Multimeter Application Manual Make the following connections: • Connect the red test leads to the SENSE HI and INPUT HI terminals. • Connect the black test leads to the SENSE LO and INPUT LO terminals. The physical connections for the front and rear panels are shown in the following figures.

  • Page 24: Sample Temperatures At A Specific Time Interval

    Model DMM7510 7½ Digit Multimeter Application Manual Section 4: Sampling temperature at a set time interval To prevent electric shock, test connections must be configured such that the user cannot come in contact with test leads or any device under test (DUT) that is in contact with the conductors.

  • Page 25: Using Scpi Commands

    Section 4: Sampling temperature at a set time interval Model DMM7510 7½ Digit Multimeter Application Manual Using SCPI commands This sequence of SCPI commands makes temperature readings every minute for 24 hours. You may need to make changes so that this code will run in your programming environment. In the table, the SCPI commands have a light gray background.

  • Page 26: Using Tsp

    Model DMM7510 7½ Digit Multimeter Application Manual Section 4: Sampling temperature at a set time interval Using TSP The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB). TSB is a software tool that is available from tek.com/keithley. You can install and use TSB to write code and develop scripts for TSP-enabled instruments.
  • Page 27 Section 4: Sampling temperature at a set time interval Model DMM7510 7½ Digit Multimeter Application Manual -- Set up timer 1. trigger.timer[1].reset() -- Timer delays each time the timer is triggered. trigger.timer[1].delay = MeasInterval -- Set the notify 1 event to trigger the start of timer. trigger.timer[1].start.stimulus = trigger.EVENT_NOTIFY1 -- Generate the timer event once when the timer delay elapses.

  • Page 28: Test Results

    Model DMM7510 7½ Digit Multimeter Application Manual Section 4: Sampling temperature at a set time interval Test results The following figures show a sample graph and final test measurement for this application. Figure 7: Model DMM7510 graph of temperature measurements Figure 8: Model DMM7510 final temperature measurement DMM7510-904-01 Rev.

  • Page 29: Grading And Binning Resistors

    Section 5 Grading and binning resistors In this section: Introduction ................5-1 Instrument connections ............5-2 Resistor grading and binning test ..........5-2 Introduction This application example demonstrates how to use the DMM7510 to perform benchtop binning operations. It uses the trigger model and digital I/O to control external component-handling devices. The DMM7510 can do simple pass-or-fail testing and grading and sorting.

  • Page 30: Instrument Connections

    Section 5: Grading and binning resistors Model DMM7510 7½ Digit Multimeter Application Manual Instrument connections In this example, the output signals that represent the grading results are sent from the DMM7510. The signals are sent to the component handler, which bins the devices. The figure below shows the rear-panel connections from the DMM7510 to the test fixture and the digital lines to the component handler.

  • Page 31: Trigger-Model Template: Gradebinning

    Model DMM7510 7½ Digit Multimeter Application Manual Section 5: Grading and binning resistors If a resistor passes the 20% limit test, the resistance value is checked against limit 2, which is the 10% limit value. If the resistor fails this limit inspection, the resistance is outside of the 10% tolerance band.

  • Page 32: Overview Of The Application

    Section 5: Grading and binning resistors Model DMM7510 7½ Digit Multimeter Application Manual limit2High Resistance = 100 Ω, Percentage = 10%, 100 + 10% = 110 Ω limit2Low Resistance = 100 Ω, Percentage = 10%, 100 − 10% = 90 Ω limit2Pattern Bin 2 fail pattern 1: Drive line 1 high (0001) limit3High...
  • Page 33 Model DMM7510 7½ Digit Multimeter Application Manual Section 5: Grading and binning resistors Using SCPI commands This sequence of SCPI commands grades resistors into bins based on the measured accuracy. You may need to make changes so that this code will run in your programming environment. Send the commands in the following tables to setup and run this example application.

  • Page 34: Using Tsp Commands

    Section 5: Grading and binning resistors Model DMM7510 7½ Digit Multimeter Application Manual Using TSP commands The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB). TSB is a software tool that is available from tek.com/keithley. You can install and use TSB to write code and develop scripts for TSP-enabled instruments.
  • Page 35 Model DMM7510 7½ Digit Multimeter Application Manual Section 5: Grading and binning resistors Send the following commands for this example application: -- Reset the instrument to default settings. reset() -- Create a user-defined reading buffer that can store up to 1 million readings. bufferVar = buffer.make(1000000) bufferVar.clear() -- Set the measure function to 4-wire resistance.

  • Page 36: Integrating With A Model 3706A-S Using Tsp-Link

    Section 6 Integrating with a Model 3706A-S using TSP-Link In this section: Introduction ................6-1 Equipment required ..............6-1 Device connections ..............6-2 Integrating with a Model 3706A-S test setup ......6-4 Introduction This application example demonstrates how to configure the DMM7510 and Model 3706A-S System ®...

  • Page 37: Device Connections

    Section 6: Integrating with a Model 3706A-S using TSP-Link Model DMM7510 7½ Digit Multimeter Application Manual Device connections The Model 3706A-S used in this test includes two multiplexer cards and screw terminal blocks: • Model 3721 Dual 1 × 20 Channel Multiplexer Card and Model 3721-ST Screw Terminal Block (slot 1) •...
  • Page 38 Model DMM7510 7½ Digit Multimeter Application Manual Section 6: Integrating with a Model 3706A-S using TSP-Link Figure 10: Connections for the Model 3706A-S integration application DMM7510-904-01 Rev. D March 2021...

  • Page 39: Integrating With A Model 3706A-S Test Setup

    Section 6: Integrating with a Model 3706A-S using TSP-Link Model DMM7510 7½ Digit Multimeter Application Manual To prevent electric shock, test connections must be configured such that the user cannot come in contact with test leads or any device under test (DUT) that is in contact with the conductors.

  • Page 40: Set Up Tsp Nodes On The Dmm7510 And Model 3706A-S

    Model DMM7510 7½ Digit Multimeter Application Manual Section 6: Integrating with a Model 3706A-S using TSP-Link Set up TSP nodes on the DMM7510 and Model 3706A-S Before executing the TSP code, you must set up the nodes on the instruments and configure the TSP-Link network.
  • Page 41 Section 6: Integrating with a Model 3706A-S using TSP-Link Model DMM7510 7½ Digit Multimeter Application Manual To use other programming environments, you may need to make changes to the example TSP code. By default, the DMM7510 uses the SCPI command set. You must select the TSP command set before sending TSP commands to the instrument.
  • Page 42 Model DMM7510 7½ Digit Multimeter Application Manual Section 6: Integrating with a Model 3706A-S using TSP-Link -- Index 4. node[2].dmm.measure.configlist.store("myScanConfigList") -- Handshaking between the DMM7510 and 3706A-S. -- Configure DMM7510 TSP-Link line 1 to input the trigger from 3706A-S. -- Input from 3706A-S. node[2].tsplink.line[1].mode = node[2].tsplink.MODE_TRIGGER_OPEN_DRAIN -- Configure DMM7510 TSP-Link line 2 to output trigger to 3706A-S.
  • Page 43 Section 6: Integrating with a Model 3706A-S using TSP-Link Model DMM7510 7½ Digit Multimeter Application Manual -- Define the number of times the scan will run. node[1].scan.scancount = 1 node[1].scan.bypass = node[1].scan.ON node[1].scan.mode = node[1].scan.MODE_FIXED_ABR --[[ Create a DMM7510 trigger model that will wait for an input trigger from 3760A-S indicating a channel is closed before making a measurement.
  • Page 44 Section 7 Capturing and analyzing waveforms In this section: Introduction ................7-1 Equipment required ..............7-1 Device connections ..............7-2 Testing a buck converter ............7-3 Introduction This example application demonstrates how to use the DMM7510 to capture voltage and current waveforms.

  • Page 45: Device Connections

    Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Device connections This application example consists of four tests with different connections. An overview of the connections is shown in the figure below. You can use either the front-panel or rear-panel connections for these tests. Make sure that the front-panel TERMINALS switch is set to the terminals you are using.

  • Page 46: Testing A Buck Converter

    Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms To prevent electric shock, test connections must be configured such that the user cannot come in contact with test leads or any device under test (DUT) that is in contact with the conductors.

  • Page 47: Ripple Noise On The Output Voltage

    Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Ripple noise on the output voltage This test measures the ripple voltage captured on the output terminal of the buck converter evaluation board. For this test, you will: •...
  • Page 48 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Run the test using the front panel To run the test using the front panel: 1. Press the POWER button on the front panel to turn on the instrument. 2.
  • Page 49 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Using SCPI commands You may need to make changes so that this code will run in your programming environment. Send the commands following in the following table to set up and run the test. Command Description *RST...

  • Page 50: Duty Cycle From Switch Node Voltage

    Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Send the following commands: -- Reset the instrument to default settings. reset() -- Create a local variable to store the number of samples. numofsamples = 100 -- Set the measure function to digitize voltage to capture the ripple waveform. dmm.digitize.func = dmm.FUNC_DIGITIZE_VOLTAGE -- Voltage range must be fixed when using digitize voltage.
  • Page 51 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual For this test, you will: • Connect the 3 Ω load resistor to the output terminals of the buck converter • Connect one test lead to the switch node voltage of the buck converter •...
  • Page 52 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Run the test using the front panel To run the duty-cycle test from the front panel: 1. Press the POWER button on the front panel to turn on the instrument. 2.
  • Page 53 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Figure 16: Duty cycle 2 • high = 8.029 μs • period = 19.16 μs • Duty cycle = 8.029 μs /19.16 μs = 40% Expected output = duty cycle × input = 40% × 12 V = 5 V The red dots at the top of the cycles indicate an overflow condition, which occurs because the 12 V measurement is over the 10 V measurement range.

  • Page 54: Inductor Current Linearity With Varying Load

    Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Using SCPI or TSP commands Use the command sequence for the ripple noise on the output voltage test to acquire the switching voltage waveform. Refer to Ripple noise on the output voltage (on page 7-4).
  • Page 55 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Figure 18: Inductor current linearity test connections Run the test using the front panel Running the inductor current linearity test from the front panel: 1. Press the POWER button on the front panel to turn on the instrument. 2.
  • Page 56 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Inductor current linearity results The front-panel graph shows results that are similar to the following. Figure 19: Inductor current linearity results at 3 Ω Figure 20: Inductor current linearity results at 4 Ω DMM7510-904-01 Rev.
  • Page 57 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Figure 21: Inductor current linearity results at 8 Ω Using SCPI commands You may need to make changes so that this code will run in your programming environment. Send the following commands: Command Description...
  • Page 58 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Using TSP commands The following TSP code is designed to be run from Keithley Instruments Test Script Builder (TSB). TSB is a software tool that is available from tek.com/keithley. You can install and use TSB to write code and develop scripts for TSP-enabled instruments.

  • Page 59: Power-Up Behavior

    Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Power-up behavior You can use the DMM7510 to capture the start-up behavior of the buck converter. The start-up inspection can ensure that the device turns on in a reasonable amount of time without any unexpected glitches or pulses.
  • Page 60 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Figure 22: Power-up behavior test connections Run the test using the front panel Set up the digitize function: 1. Press the POWER button on the front panel to turn on the instrument. 2.
  • Page 61 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual Set up triggering: 1. Press the MENU key. 2. Select Graph. 3. Select the Scale tab. 4. Set the X-Axis Method to Show All Readings. 5. Select the Trigger tab. 6.
  • Page 62 Model DMM7510 7½ Digit Multimeter Application Manual Section 7: Capturing and analyzing waveforms Using SCPI commands You may need to make changes so that this code will run in your programming environment. Send the following commands: Command Description *RST ▪ Reset the DMM7510.
  • Page 63 Section 7: Capturing and analyzing waveforms Model DMM7510 7½ Digit Multimeter Application Manual To enable TSP commands: 1. Press the MENU key. 2. Under System, select Settings. 3. Set the Command Set to TSP. 4. At the prompt to reboot, select Yes. Send the following commands: -- Reset the instrument to default settings.

  • Page 64: Next Steps

    Section 8 Next steps In this section: Additional information ............... 8-1 Additional information This manual has prepared you to start using your new DMM7510 7½ Digit Multimeter for your application. For detailed information on all features of the DMM7510, refer to the Keithley Instruments Model DMM7510 Reference Manual, part number DMM7510-901-01.
  • Page 65 Specifications are subject to change without notice. All Keithley trademarks and trade names are the property of Keithley Instruments. All other trademarks and trade names are the property of their respective companies. Keithley Instruments Corporate Headquarters • 28775 Aurora Road • Cleveland, Ohio 44139 • 1-800-833-9200 • tek.com/keithley 07/2020...

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