tek.com/keithley Model 2470 High Voltage SourceMeter® Instrument User’s Manual 2470-900-01 Rev.
Model 2470 High Voltage SourceMeter Instrument User's Manual
© 2019, 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. TSP®, TSP-Link®, and TSP-Net® are trademarks of Keithley Instruments, LLC. All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments, LLC.
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.
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.
Table of contents Introduction ................................................................................................................ 1-1 Welcome .............................................................................................................................. 1-1 Introduction to this manual ................................................................................................... 1-2 Extended warranty ...........................................................................
Table of contents Model 2470 High Voltage SourceMeter Instrument User's Manual Making basic front-panel measurements ................................................................ 4-1 Introduction .......................................................................................................................... 4-1 Equipment required for this application................................................................................ 4-2 Device connections .........................................
Model 2470 High Voltage SourceMeter Instrument User's Manual Where can I find updated drivers? ....................................................................................... 7-1 How do I upgrade the firmware? .......................................................................................... 7-2 Why can't the 2470 read my USB flash drive? .................................................................... 7-2 How do I change the command set? ................................................
Section 1 Introduction In this section: Welcome .................................................................................. 1-1 Introduction to this manual ....................................................... 1-2 Extended warranty ................................................................... 1-2 Contact information .................................................................. 1-2 Organization of manual sections .............................................. 1-2 Applications ............
Section 1: Introduction Model 2470 High Voltage SourceMeter Instrument User's Manual Introduction to this manual This manual provides detailed applications to help you achieve success with your Keithley Instruments 2470. In addition, this manual provides information about the basics of the front panel to familiarize you with the instrument.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 1: Introduction The PDF version of this manual contains bookmarks for each section. The manual sections are also listed in the Table of Contents at the beginning of this manual. For more information about bookmarks, see Adobe® Acrobat® or Reader® help. Applications This manual provides application examples that show you how to perform tests from the front panel and over a remote interface.
Section 2 Front-panel overview In this section: Power the instrument on or off ................................................. 2-1 Front-panel overview ................................................................ 2-3 Turn the 2470 output on or off .................................................. 2-5 Touchscreen display ................................................................ 2-6 Store measurements on a USB flash drive ............................
Section 2: Front-panel overview Model 2470 High Voltage SourceMeter Instrument User's Manual To connect the power cord: 1. Make sure that the front-panel POWER switch is in the off (O) position. 2. Connect the female end of the supplied power cord to the AC receptacle on the rear panel. 3. Connect the male end of the power cord to a grounded AC outlet. Figure 1: Model 2470 AC receptacle on rear panel To turn a 2470 on or off: 1.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 2: Front-panel overview Front-panel overview The front panel of the 2470 is shown below. Descriptions of the controls on the front panel follow the figure. Figure 2: Model 2470 front panel Control POWER switch HOME key MENU key QUICKSET key HELP key USB port Touchscreen Navigation control ENTER key 2470-900-01 Rev. A / May 2019 Graphic Description Turns the instrument on or off.
Section 2: Front-panel overview Control EXIT key FUNCTION key TRIGGER key OUTPUT ON/OFF switch REMOTE LED indicator LAN LED indicator 1588 LED indicator INTERLOCK LED indicator SENSE terminals Graphic Description Returns to the previous screen or closes a dialog box. For example, press the EXIT key when the main menu is displayed to return to the home screen. When you are viewing a subscreen (for example, the Event Log screen), press the EXIT key to return to the main menu screen.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 2: Front-panel overview Turn the 2470 output on or off You can turn the 2470 output on from the front panel or by sending remote commands. Turning the 2470 output off does not place the instrument in a safe state (an interlock is provided for this function). Hazardous voltages may be present on all output and guard terminals.
Section 2: Front-panel overview Model 2470 High Voltage SourceMeter Instrument User's Manual Touchscreen display The touchscreen display gives you quick front-panel access to source and measure settings, system configuration, instrument and test status, reading buffer information, and other instrument functionality. The display has multiple swipe screens that you can access by swiping the front panel.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 2: Front-panel overview Interactive swipe screens The 2470 touchscreen display has multiple screens that you can access by swiping left or right on the lower half of the display. The options available in the swipe screens are described in the following topics. Swipe screen heading bar The heading bar of the swipe screen contains the following options.
Section 2: Front-panel overview Model 2470 High Voltage SourceMeter Instrument User's Manual SOURCE swipe screen The SOURCE swipe screen shows the present value of the source and the set values for source, source range, and source limit. You can change the set values from the front panel by selecting the buttons on this screen. Figure 5: SOURCE swipe screen Source function indicators on the right side of the screen signify settings that affect the displayed source value.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 2: Front-panel overview STATISTICS swipe screen The STATISTICS swipe screen contains information about the readings in the active reading buffer. When the reading buffer is configured to fill continuously and overwrite old data with new data, the buffer statistics include the data that was overwritten.
Section 2: Front-panel overview Model 2470 High Voltage SourceMeter Instrument User's Manual Menu overview To access the main menu, press the MENU key on the 2470 front panel. The figure below shows the organization of the main menu. Figure 10: 2470 main menu The main menu includes submenus that are labeled in green across the top of the display. Selecting an option in a submenu opens an interactive screen.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 2: Front-panel overview Save screen captures to a USB flash drive You can save a screen capture of the front-panel display to a graphic file. The instrument saves the graphic file to the USB flash drive in the PNG file format. To save a screen capture: 1. Insert a USB flash drive in the USB port on the front panel of the instrument. 2. Navigate to the screen you want to capture. 3. Press the HOME and ENTER keys.
Section 3 Using a remote interface In this section: Remote communications interfaces ......................................... 3-1 Supported remote interfaces .................................................... 3-1 GPIB communications .............................................................. 3-2 LAN communications ............................................................... 3-4 USB communications ............................................................... 3-7 Using the web interface ...........
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual GPIB communications The 2470 GPIB interface is IEEE Std 488.1 compliant and supports IEEE Std 488.2 common commands and status model topology. You can have up to 15 devices connected to a GPIB interface, including the controller. The maximum cable length is the lesser of either: • The number of devices multiplied by 2 m (6.5 ft) • 20 m (65.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface To allow many parallel connections to one instrument, stack the connectors. Each connector has two screws on it to ensure that connections remain secure. The figure below shows a typical connection diagram for a test system with multiple instruments. To avoid possible mechanical damage, stack no more than three connectors on any one instrument.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual Set the GPIB address The default GPIB address is 18. You can set the address from 1 to 30 if it is unique in the system. This address cannot conflict with an address that is assigned to another instrument or to the GPIB controller. GPIB controllers are usually set to 0 or 21. To be safe, do not configure any instrument to have an address of 21. The instrument saves the address in nonvolatile memory.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface Contact your network administrator to confirm your specific network requirements before setting up a LAN connection. If you have problems setting up the LAN, refer to LAN troubleshooting suggestions (on page 3-13). Set up LAN communications on the instrument This section describes how to set up manual or automatic LAN communications on the instrument.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual Set up manual LAN configuration If necessary, you can set the IP address on the instrument manually. You can also enable or disable the DNS settings and assign a host name to the DNS server. Contact your corporate information technology (IT) department to secure a valid IP address for the instrument when placing the instrument on a corporate network.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface Verify the LAN connection on the 2470 Make sure that your 2470 is connected to the network by confirming that your instrument was assigned an IP address. To verify the LAN connection: 1. Press the MENU key. 2. Under System, select Communication. 3. Select the LAN tab. The green LAN LED on the upper right of the front panel is on when your instrument is connected to the network.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual Connect a computer to the 2470 using USB To communicate from a computer to the instrument you need a USB cable with a USB Type B connector end and a USB type A connector end. You need a separate USB cable for each instrument you plan to connect to the computer at the same time using the USB interface. To connect an instrument to a computer using USB: 1. Connect the Type A end of the cable to the computer. 2.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface To use the Keithley Configuration Panel to determine the VISA resource string: 1. Click Start > Keithley Instruments > Keithley Configuration Panel. The Select Operation dialog box is displayed. Figure 13: Select Operation dialog box 2. Select Add. 3. Select Next. The Select Communication Bus dialog box is displayed. Figure 14: Select Communication Bus dialog box 2470-900-01 Rev.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual 4. Select USB. 5. Click Next. The Select Instrument Driver dialog box is displayed. Figure 15: Select Instrument Driver dialog box 6. Select Auto-detect Instrument Driver - Model. 7. Click Next. The Configure USB Instrument dialog box is displayed with the detected instrument VISA resource string visible. 8. Click Next. The Name Virtual Instrument dialog box is displayed.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface 9. In the Virtual Instrument Name box, enter a name that you want to use to refer to the instrument. 10. Select Finish. 11. Select Cancel to close the Wizard. 12. Save the configuration. From the Keithley Configuration Panel, select File > Save. Verify the instrument through the Keithley Communicator: 1. Click Start > Keithley Instruments > Keithley Communicator. 2.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual Using the web interface The 2470 web interface allows you to make settings and control your instrument through a web page. The web page includes: • Instrument status. • The instrument model, serial number, firmware revision, and the last LXI message. • An ID button to help you locate the instrument. • A virtual front panel and command interface that you can use to control the instrument.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface LAN troubleshooting suggestions If you are unable to connect to the web interface of the instrument, check the following items: • The network cable is in the LAN port on the rear panel of the instrument, not one of the TSP-Link® ports. • The network cable is in the correct port on the computer. The LAN port of a laptop may be disabled when the laptop is in a docking station.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual Web interface Home page Figure 18: Model 2470 web interface Home page The Home page of the instrument provides information about the instrument. It includes: • The instrument model number, manufacturer, serial number, and firmware revision number. • The TCP Raw Socket number and Telnet Port number. • The last LXI message. The history link opens the LXI Home page.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 3: Using a remote interface Review events in the event log The event log records all LXI events that the instrument generates and receives. The log includes the following information: • The EventID column, which shows the identifier of the event that generated the event message. • The System Timestamp column, which displays the seconds and nanoseconds when the event occurred.
Section 3: Using a remote interface Model 2470 High Voltage SourceMeter Instrument User's Manual To verify which command set is selected from a remote interface: Send the command: *LANG? To change to the SCPI command set from a remote interface: Send the command: *LANG SCPI Reboot the instrument. To change to the TSP command set from a remote interface: Send the command: *LANG TSP Reboot the instrument. 3-16 2470-900-01 Rev.
Section 4 Making basic front-panel measurements In this section: Introduction .............................................................................. 4-1 Equipment required for this application .................................... 4-2 Device connections .................................................................. 4-2 Make front-panel measurements..............................................
Section 4: Making basic front-panel measurements Model 2470 High Voltage SourceMeter Instrument User's Manual Equipment required for this application Equipment required for this application: • 2470 High Voltage SourceMeter Instrument • Two insulated banana cables; you can use the set that is provided with the 2470, the Keithley Instruments Model 8608 High-Performance Clip Lead Set • One 10 kΩ resistor to test Device connections Turn the power to the instrument off before attaching connections to th
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 4: Making basic front-panel measurements Make front-panel measurements For this application, you will: • Select the source and measure functions • Select the source range • Set the source value • Set the source limit • Select the measurement range • Turn on the source output • Observe the readings on the display • Turn off the source output How to make front-panel measurements To make a measurement from the front panel:
Section 5 Leakage current and insulation resistance In this section: Introduction .............................................................................. 5-1 Equipment required .................................................................. 5-2 Set up remote communications ................................................ 5-2 Device connections .................................................................. 5-2 Measuring leakage current .......................................................
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual Equipment required • One 2470 High Voltage SourceMeter Instrument • Two TRX-1100V-X 3-Slot High-Voltage Low-Noise Triaxial Cables (available from Keithley Instruments) • One high-voltage capacitor for the leakage current application • One coaxial cable or other device for the insulation resistance application • One ethernet, GPIB, or USB cable for the SCPI and TSP remote command examp
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance Figure 21: Capacitor leakage and insulation resistance test connection schematics The following figures show the rear-terminal connections to the device under test (DUT) for these applications. If capacitor leakage measurements are noisy, you may need to use the high capacitance mode or add a low leakage forward-biased diode in series with the capacitor.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual Measuring leakage current The following application demonstrates how to use the 2470 to measure the leakage current of a high-voltage 10 µF capacitor by sourcing a voltage and measuring the resulting current using the front panel or over the remote interface. The remote interface examples show SCPI commands and TSP commands.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance Set up the leakage current application using the front panel To set up the application from the front panel: 1. Use the test leads to make the connection from the capacitor to the rear panel of the 2470, as described in Device connections (on page 5-2). 2. Reset the 2470. a. Press the MENU key. b. Under System, select Info/Manage. c. Select System Reset, and then select OK. 3.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual View the measurements on the front-panel graph To view the leakage current measurements on the front-panel graph: 1. Press the MENU key. 2. Under Views, select Graph. 3. Select the Scale tab. 4. Under Y-Axis, next to Scale Format, select Log. 5. Under X-Axis, next to Method, select All. 6. Select the Graph tab to view the graph.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance Set up the leakage current application using SCPI commands The following SCPI code performs a capacitor leakage measurement by sourcing 300 V and measuring the resulting leakage current. The DurationLoop trigger model template applies the voltage for 30 seconds and makes measurements at 200 ms intervals. After the duration time, the capacitor is discharged at 0 V and the output is turned off.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's 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. The following TSP code performs a capacitor leakage measurement by sourcing 300 V and measuring the resulting leakage current.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance The graph in the following figure shows the results of this application. Notice the exponential current response of the capacitor as it charges up to 300 V over time. Figure 25: Leakage current test results Measuring insulation resistance The following application demonstrates how to use the 2470 to measure insulator resistance.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual Set up the insulation resistance application using the front panel To set up the application from the front panel: 1. Connect the device under test (DUT) to the rear panel of the 2470, as described in Device connections (on page 5-2). 2. Reset the 2470. a. Press the MENU key. b. Under System, select Info/Manage. c. Select System Reset, and then select OK. 3.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance Viewing the measurements on the front-panel graph To view the insulation resistance measurements on the front-panel graph: 1. Press the MENU key. 2. Under Views, select Graph. The following figure shows the front-panel graph for this application. Figure 26: Insulation resistance graph 2470-900-01 Rev.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual Set up the application using SCPI commands The following SCPI commands make insulation resistance measurements by sourcing 700 V and measuring the resistance. The Simple Loop trigger model template is used to make 10 measurements at 100 ms intervals. Send the following commands for this example application: Command *RST :ROUT:TERM REAR :SOUR:FUNC VOLT :SOUR:VOLT 700 :SOUR:VOLT:ILIM 0.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 5: Leakage current and insulation resistance Set up the application 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.
Section 5: Leakage current and insulation resistance Model 2470 High Voltage SourceMeter Instrument User's Manual Send the following commands for this example application: --Reset the instrument reset() --Set up the source function. smu.source.func = smu.FUNC_DC_VOLTAGE smu.source.ilimit.level = 1e-3 smu.source.level = 700 --Set up the measure function smu.measure.func = smu.FUNC_DC_CURRENT smu.measure.unit = smu.UNIT_OHM smu.terminals = smu.TERMINALS_REAR smu.measure.autorange = smu.ON smu.measure.
Section 6 Measure I-V characteristics of FETs In this section: Introduction .............................................................................. 6-1 Equipment required .................................................................. 6-2 Set up remote communications ................................................ 6-2 Set up external hardware triggers ............................................ 6-3 Device connections ..................................................................
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual The SCPI and TSP examples differ in this application. The TSP version uses Keithley Instruments TSP-Link®, which is a high-speed trigger synchronization and communication bus that test system builders can use to connect multiple instruments in a master and subordinate configuration.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs Set up external hardware triggers To enable synchronization between the two 2470 instruments for stepping and sweeping voltages, connect the external triggers of each instrument to the other. The cabling you use depends on which 2470 programming command set you choose to control the test.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual If you are using USB cables to connect the computer and 2470 instruments, each instrument must be connected to the computer with a separate USB cable. If you are using ethernet connections to connect the computer and 2470 instruments, the instruments and computer must be connected using an ethernet switch or hub.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs To set the 2470 TSP-Link nodes from the front panel: 1. Press the MENU key. 2. Under System, select Communication. The SYSTEM COMMUNICATION window opens. 3. On the TSP-Link tab, set Node to the node number of this instrument and select OK. 4. Select Initialize. 5. Press the HOME key to return to the Home screen. Repeat these steps for each 2470 instrument in your TSP-Link network.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual Figure 31: Drain leakage current measurement device connections The following figure shows the connections from the rear-panel terminals of the 2470. Figure 32: Drain leakage current measurement rear-panel terminal connections 6-6 2470-900-01 Rev.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs Subthreshold current or drain family of curves measurement device connections Both a subthreshold current and a drain family of curves measurement use the same instrument connections. Both 2470s are configured to source voltage and measure current. In this circuit: • Connect the Force HI terminal of 2470 #1 to the gate of the FET.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual The following figure shows the connections from the rear-panel terminals of both 2470s to the FET. Figure 34: Two 2470s set up to test a three-terminal FET Remote control of FET testing using SCPI commands The two example sequences of SCPI commands for this application generate a drain family of curves on a FET using two 2470 instruments.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs Send the following commands for this example application: SMU 1, SMU 2, or pseudocode Commands SMU 1 *RST :SENS:FUNC "CURR" :SENS:CURR:RANG:AUTO ON :ROUT:TERM REAR :SOUR:FUNC VOLT :SOUR:VOLT:RANG 20 :SOUR:CONF:LIST:CRE "stepVals" :DIG:LINE1:MODE TRIG, OUT :DIG:LINE2:MODE TRIG, IN :TRIG:DIG1:OUT:STIM NOT1 :TRIG:DIG2:IN:CLE :TRIG:DIG2:IN:EDGE RIS Pseudocode for i = 2 to 5 do: SMU 1 :SOUR:VOLT i :
Section 6: Measure I-V characteristics of FETs SMU 2 Model 2470 High Voltage SourceMeter Instrument User's Manual *RST :SENS:FUNC "CURR" :SENS:CURR:RANG:AUTO ON :ROUT:TERM REAR :SOUR:FUNC VOLT :SOUR:VOLT:RANG 20 :SOUR:VOLT:ILIM 1 :SOUR:CONF:LIST:CRE "sweepVals" :DIG:LINE2:MODE TRIG, OUT :DIG:LINE1:MODE TRIG, IN :TRIG:DIG2:OUT:STIM NOT2 :TRIG:DIG1:IN:CLE :TRIG:DIG1:IN:EDGE RIS Pseudocode for i = 0, 5, 0.
Model 2470 High Voltage SourceMeter Instrument User's Manual SMU 2 Section 6: Measure I-V characteristics of FETs :INIT *WAI Pseudocode vds = [] ids = [] for i = 2, 5 do: Pseudocode vds[i-1] = TRAC:DATA? 1 51*(i-1), "defbuffer1", for SMU2 ids[i-1] = TRAC:DATA? 1 51*(i-1), "defbuffer1", + 51*(i-2), SOUR + 51*(i-2), READ Pseudocode end for Initiate the trigger model. Wait for the model to complete. Create an empty array to hold measured voltage values.
Section 6: Measure I-V characteristics of FETs SMU 2 SMU 1 Model 2470 High Voltage SourceMeter Instrument User's Manual *RST :SENS:FUNC "CURR" :SENS:CURR:RANG:AUTO ON :ROUT:TERM REAR :SOUR:FUNC VOLT :SOUR:VOLT:RANG 20 :SOUR:VOLT:ILIM 1 :SOUR:SWE:VOLT:LIN 0, 5, 51, 0.01 :OUTP ON Pseudocode vds = [] ids = [] for i = 2, 5 do: :SOUR:VOLT i Pseudocode delay(0.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs Remote control of FET testing 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.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual Send the following commands for this example application: -- Reset the instrument, which also clears the buffer. reset() -- Set up the source function. smu.source.func = smu.FUNC_DC_VOLTAGE smu.source.ilimit.level = 10e-3 smu.source.level = 600 -- Set up measure function. smu.measure.func = smu.FUNC_DC_CURRENT smu.measure.terminals = smu.TERMINALS_REAR smu.measure.autorange = smu.ON smu.measure.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs Set up a subthreshold current measurement using TSP commands The following TSP code uses the trigger model to find the subthreshold swing, S, of a FET using two 2470s communicating with each other using TSP-Link. The SMU at Node 1 is connected to the gate and steps voltage from 0 V to 5 V. The SMU at Node 2 is connected to the drain and applies a bias voltage while measuring current.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual -- Set up TSP-Link triggering. gate.tsplink.line[1].reset() gate.tsplink.line[1].mode = gate.tsplink.MODE_SYNCHRONOUS_MASTER gate.trigger.tsplinkout[1].stimulus = gate.trigger.EVENT_NOTIFY1 -- Populate the stepVals source config list with source levels gateVstart volts to gateVstop volts. for i = gateVstart, gateVstop, gateStepSize do gate.smu.source.level = i gate.smu.source.configlist.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs -- Perform basic exponential fit local diffHighV, diffLowV = 9.9e37, 9.9e37 local fitHighIndex = 0 local fitLowIndex = 0 local gateV = 0 local gateHighV = 0 local gateLowV = 0 -- Find actual gate voltage (and indexes) closest to fitHighV and fitLowV for i = 1, gate.defbuffer1.n do gateV = gate.defbuffer1.sourcevalues[i] if math.abs(gateV - fitHighV) < diffHighV then diffHighV = math.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual Set up the drain family of curves measurement using TSP commands The following TSP code uses the trigger model to generate a drain family of curves on a FET using two 2470s communicating with each other using TSP-Link. The SMU at Node 1 is connected to the gate and steps voltage from 2 V to 5 V in four steps.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 6: Measure I-V characteristics of FETs -- Populate the stepVals source config list, with source levels 2 V to 5 V. for i = gateVstart, gateVstop, gateStepSize do gate.smu.source.level = i gate.smu.source.configlist.store("stepVals") end local stepPoints = (gateVstop - gateVstart) * (1 / gateStepSize) + 1 -- Set up the trigger model. gate.trigger.model.setblock(1, trigger.BLOCK_CONFIG_RECALL, "stepVals") gate.trigger.model.
Section 6: Measure I-V characteristics of FETs Model 2470 High Voltage SourceMeter Instrument User's Manual -- Start the trigger model for both SMUs and wait until it is complete drain.trigger.model.initiate() gate.trigger.model.initiate() print("Test Running...") waitcomplete() -- Print the formatted readings. if defbuffer1.n == 0 then print("\nNo readings in buffer\n") else print(string.format("drainV,\tdrainI(1),\t\tdrainV,\tdrainI(2),\t\tdrainV,\tdrai nI(3),\t\tdrainV,\tdrainI(4)")) for k = 1, sweepPo
Section 7 Troubleshooting FAQs In this section: About this section ..................................................................... 7-1 Where can I find updated drivers? ............................................ 7-1 How do I upgrade the firmware? .............................................. 7-2 Why can't the 2470 read my USB flash drive? ......................... 7-2 How do I change the command set? ........................................ 7-3 Why am I getting a 5074 event code? .................
Section 7: Troubleshooting FAQs Model 2470 High Voltage SourceMeter Instrument User's Manual How do I upgrade the firmware? Do not turn off power or remove the USB flash drive until the upgrade process is complete. The firmware file must be in the root subdirectory of the flash drive and must be the only firmware file in that location. You can upgrade or downgrade the firmware from the front panel or from the virtual front panel.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 7: Troubleshooting FAQs How do I change the command set? You can change the command set that you use with the 2470. The remote command sets that are available include: • SCPI: An instrument-specific language built on the SCPI standard. • TSP: A scripting programming language that contains instrument-specific control commands that can be executed from a stand-alone instrument.
Section 7: Troubleshooting FAQs Model 2470 High Voltage SourceMeter Instrument User's Manual Why am I getting a 5074 event code? The instrument provides an interlock circuit on the rear panel. You must enable this circuit in order for the instrument to set source voltages greater than ±42 V DC. If you try to assign a high-voltage output and turn the source on when the interlock is not asserted, you see event code 5074, "Output voltage limited by interlock.
Model 2470 High Voltage SourceMeter Instrument User's Manual Section 7: Troubleshooting FAQs Using SCPI commands: Configure the instrument to the settings that you want to save. To save the setup, send the command: *SAV Where is an integer from 0 to 4. In the front-panel script menus, the setups saved with the *SAV command have the name Setup0x, where x is the value you set for . Using TSP commands: Configure the instrument to the settings that you want to save.
Section 7: Troubleshooting FAQs Model 2470 High Voltage SourceMeter Instrument User's Manual What are the Quick Setup options? The QUICKSET key opens a screen that provides access to function selection, performance adjustments, and quick setups. The Function button on the Quickset menu allows you to select a source or measure function. The options are the same as those available when you use the front-panel FUNCTION key. The Performance slider allows you to adjust speed and resolution.
Section 8 Next steps In this section: Additional 2470 information ...................................................... 8-1 Additional 2470 information This manual has prepared you to start using your new 2470 High Voltage SourceMeter Instrument for your application. For more detailed information, refer to the Keithley Instruments 2470 Reference Manual. Also see tek.com/keithley for support and additional information about the instrument.
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 • 440-248-0400 • Fax: 440-248-6168 • 1-800-935-5595 • tek.
