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Related Manuals for Tektronix KEITHLEY SourceMeter 2400 Series
Summary of Contents for Tektronix KEITHLEY SourceMeter 2400 Series
- Page 1 www.tek.com/keithley Model 2461 1 kW Pulse Mode Interactive SourceMeter® Instrument Calibration and Adjustment Manual 2461-905-01 Rev. A / February 2016 *P2461-905-01A* 2461-905-01A A Greater M easure of Confidence A T ektr onix Company...
- Page 2 Model 2461 Calibration and Adjustment Manual © 2016, Keithley Instruments 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 is strictly prohibited. ®...
- Page 3 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 qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury.
- Page 4 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, as defined in the specifications and operating information, and as shown on the instrument or test fixture panels, or switching card.
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Page 5: 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 Factory service ........................1-2 Preparing for calibration verification and adjustment ........... 2-1 Calibration verification and adjustment test requirements ........... 2-1 Environmental conditions ...................... - Page 6 Table of Contents Model 2461 Calibration and Adjustment Manual Remote adjustment ......................4-4 Calibration adjustment commands summary ................4-7 Remote adjustment procedure ..................... 4-7 Step 1. Prepare the Model 2461 for adjustment ................ 4-7 Step 2. Voltage adjustment ....................... 4-8 Step 3.
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Page 7: Introduction
Section 1 Introduction In this section: Welcome .................. 1-1 Introduction to this manual ............1-1 Extended warranty ..............1-2 Contact information ..............1-2 Factory service ................. 1-2 Welcome Thank you for choosing a Keithley Instruments product. The Model 2461 1 kW Pulse Mode Interactive ®... -
Page 8: Extended Warranty
To return the instrument to Keithley Instruments for repair: • Call the Repair Department at 1-800-833-9200 or send an email to RMAREQUEST@tektronix.com for a Return Material Authorization (RMA) number. • Carefully pack the instrument in the original packing carton. •... -
Page 9: Preparing For Calibration Verification And Adjustment
Section 2 Preparing for calibration verification and adjustment In this section: Calibration verification and adjustment test requirements ..2-1 Calibration and adjustment connections ........2-3 Calibration verification and adjustment considerations .... 2-7 Calibration verification and adjustment test requirements The following topics describe what you must do to prepare the Model 2461 for calibration verification and adjustment. -
Page 10: Recommended Test Equipment
Section 2: Preparing for calibration verification and adjustment Model 2461 Calibration and Adjustment Manual Recommended test equipment The following table summarizes recommended calibration verification and adjustment equipment. Test equipment uncertainty adds to the uncertainty of each measurement. Generally, test equipment uncertainty should be at least four times smaller than the corresponding Model 2461 specifications. -
Page 11: Calibration And Adjustment Connections
Model 2461 Calibration and Adjustment Manual Section 2: Preparing for calibration verification and adjustment Calibration and adjustment connections Connections for Model 2461 calibration verification and adjustment are the same. The following topics describe the connections you should use for the different ranges and functions. Hazardous voltages may be present on all output and guard terminals. -
Page 12: Connections For The 200 Mv To 100 V Ranges
Section 2: Preparing for calibration verification and adjustment Model 2461 Calibration and Adjustment Manual Connections for the 200 mV to 100 V ranges For calibration verification or adjustment on the 200 mV to 100 V ranges, use either the front-panel or rear-panel connections shown in the following figures. -
Page 13: Connections For The 1 Μa To 1 A Ranges
Model 2461 Calibration and Adjustment Manual Section 2: Preparing for calibration verification and adjustment Connections for the 1 µA to 1 A ranges For calibration verification or adjustment on the 1 µA to 1 A ranges, use either the front-panel or rear-panel connections shown in the following figures. -
Page 14: Connections For Resistance Calibration Verification And Adjustment
Section 2: Preparing for calibration verification and adjustment Model 2461 Calibration and Adjustment Manual Figure 6: Rear-panel connections for the 4 A to 10 A ranges Connections for resistance calibration verification and adjustment For resistance calibration verification or adjustment, use either the front-panel or rear-panel connections shown in the following figures. -
Page 15: Remote Communications Connections
Model 2461 Calibration and Adjustment Manual Section 2: Preparing for calibration verification and adjustment Remote communications connections The procedures in this manual use SCPI commands sent to the Model 2461 from a remote interface. Select one of the remote interface connections shown below. The instrument automatically detects the connection. -
Page 16: Calibration
Section 3 Calibration In this section: Introduction ................3-1 Calibration verification limits ............. 3-2 Setting the measurement range ..........3-3 Taking the Model 2461 out of a limit overflow state ....3-3 Remote calibration verification procedure ........ 3-3 Introduction Use the procedures in this section to verify that Model 2461 accuracy is within the limits stated in the instrument’s one-year accuracy specifications. -
Page 17: Calibration Verification Limits
Section 3: Calibration Model 2461 Calibration and Adjustment Manual Calibration verification limits Before performing the calibration verification test procedures, you must calculate the calibration verification limits using the Model 2461 specifications. The most recent version of the specifications is on the Downloads, Manuals, and Documentation web page (http://www.tek.com/downloads). -
Page 18: Setting The Measurement Range
Model 2461 Calibration and Adjustment Manual Section 3: Calibration Setting the measurement range When simultaneously sourcing and measuring either voltage or current, the measure range is coupled to the source range, and you cannot independently control the measure range. As a result, you do not set the range when testing voltage or current measurement accuracy. -
Page 19: Step 2. Voltage Calibration Verification
Section 3: Calibration Model 2461 Calibration and Adjustment Manual Step 2. Voltage calibration verification Follow the steps below to verify that Model 2461 voltage source-measure-digitize accuracy is within specified limits. This test involves setting the output voltage to each full-range value and measuring the voltages with a precision digital multimeter (DMM). - Page 20 Model 2461 Calibration and Adjustment Manual Section 3: Calibration Complete the calibration verification steps listed in the following table for each voltage range. For each voltage range, perform the complete procedure at 95 percent of the range's positive full-scale value, then at 0 V, then at 95 percent of the range's negative full scale value, and then again at 0 V. For example, for the 200 mV range, complete the procedure four times using each of the following values, in this order: +190 mV, 0 V, −190 mV, 0 V.
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Page 21: Step 3. Current Calibration Verification
Section 3: Calibration Model 2461 Calibration and Adjustment Manual Step 3. Current calibration verification Keithley Instruments recommends two different connection configurations for current calibration verification: For the 1 µA to 1 A ranges, use the connection diagrams in Connections for the 1 µA to 1 A ranges (on page 2-5). - Page 22 Model 2461 Calibration and Adjustment Manual Section 3: Calibration 3. Complete the calibration steps listed in the following table for each current range. For each current range, perform the complete procedure at 95 percent of the range's positive full-scale value, then at 0 A, then at 95 percent of the range's negative full scale value, and then again at 0 A.
- Page 23 Section 3: Calibration Model 2461 Calibration and Adjustment Manual When verifying the 4 A to 10 A ranges using a shunt resistor, use the following formula to calculate the current: Current (I) = Voltage (V) / Resistance (R) Where: Resistance is either the value stated by the specifications for the shunt resistor, or for greater measurement accuracy, resistance is the measured resistance value of the shunt resistor.
- Page 24 Model 2461 Calibration and Adjustment Manual Section 3: Calibration Current calibration verification procedure for the 4 A to 10 A ranges Step Command or procedure Description Restore default settings. *RST :SOUR:FUNC CURR Select the source function. :FUNC "CURR" Select the measure function.* :SOUR:CURR:RANG <Range>...
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Page 25: Step 4. Resistance Measurement Calibration Verification
Section 3: Calibration Model 2461 Calibration and Adjustment Manual Step 4. Resistance measurement calibration verification Follow the steps below to verify that Model 2461 resistance measurement accuracy is within specified limits. In this procedure, you apply accurate resistances from a resistance calibrator and then verify that Model 2461 resistance measurements are within required limits. - Page 26 Model 2461 Calibration and Adjustment Manual Section 3: Calibration It may not be possible to set the resistance calibrator to the specified value. Use the closest possible setting and modify reading limits accordingly. 5. Verify that the Model 2461 resistance reading is within the limits in the following table. Ohms measurement accuracy limits Model 2461 range Calibrator resistance*...
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Page 27: Adjustment
Section 4 Adjustment In this section: Introduction ................4-1 Unlocking calibration for adjustment ........4-1 Changing the password ............4-2 Resetting the calibration password .......... 4-3 Querying calibration and adjustment dates and count ..... 4-3 Adjustment errors ..............4-3 Remote adjustment ..............4-4 Remote adjustment procedure .......... -
Page 28: Changing The Password
Section 4: Adjustment Model 2461 Calibration and Adjustment Manual With calibration unlocked, the sense function and the source function and range are the same. For example, when :SOURce:FUNCtion is set to VOLTage, the :SENSe:FUNCtion setting is "VOLTage:DC". When :SOURce:FUNCtion is set to CURRent, the :SENSe:FUNCtion setting is "CURR:DC". -
Page 29: Resetting The Calibration Password
Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Resetting the calibration password If you change the Model 2461 calibration password and forget it, you must return the Model 2461 to the local Keithley Worldwide Service Center to be reset. There is no user-serviceable procedure to restore the default calibration password on the Model 2461. -
Page 30: Remote Adjustment
Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Remote adjustment Use the following procedure to perform remote adjustment by sending SCPI commands over the IEEE-488, USB, or LAN connection. The remote commands and appropriate parameters are separately summarized for each step. You can use the following tables to document each calibration adjustment value as the calibration adjustment procedure is executed. - Page 31 Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Current calibration adjustment data table Source range Source current DMM current reading* 1 μA +1.0000 μA ____________________________ μA +0.0000 μA ____________________________ μA ____________________________ μA −1.0000 μA ____________________________ μA −0.0000 μA 10 μA +10.000 μA ____________________________ μA +00.000 μA...
- Page 32 Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Source range Source current DMM current reading* +4.0000 A ____________________________ A +000.00 A ____________________________ A −4.0000 A ____________________________ A −000.00 A ____________________________ A +5.0000 A ____________________________ A +000.00 A ____________________________ A −5.0000 A ____________________________ A −000.00 A...
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Page 33: Calibration Adjustment Commands Summary
Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Calibration adjustment commands summary The following table summarizes the Model 2461 calibration adjustment commands. For more detailed descriptions of the commands, see the Command reference (on page 5-1) section. SCPI command Description Unlock calibration:* Changes the password if :CALibration:PASSword... -
Page 34: Step 2. Voltage Adjustment
Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Step 2. Voltage adjustment 1. With the source output off, connect the Keithley Model 2461 to the digital multimeter (DMM) as shown in Connections for the 200 mV to 100 V ranges (on page 2-4). - Page 35 Model 2461 Calibration and Adjustment Manual Section 4: Adjustment 5. Complete the range adjustment steps listed in the following table for each range. Do the following for each range: Send the :SOURce:VOLTage:RANGe command to select the source and sense range to adjust.
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Page 36: Step 3. Current Adjustment
Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Voltage range calibration adjustment commands Step Command Description :SOUR:VOLT:RANG <Range> Select the source range. :SOUR:VOLT -<Range> Establish negative polarity. DMM reading 1.** Read the actual output value on the DMM. :CAL:ADJ:SOUR <DMM_Reading1> Adjust the source function negative full scale. - Page 37 Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Current adjustment for the 1 µA to 1 A ranges 1. With the source output off, connect the Model 2461 to the digital multimeter (DMM) using the connection configuration in Connections for the 1 µA to 1 A ranges (on page 2-5).
- Page 38 Section 4: Adjustment Model 2461 Calibration and Adjustment Manual 5. Adjust each current range using the procedure summarized in the following table. Do the following for each range: Send the :SOURce:CURRent:RANGe command to select the source and sense range to adjust.
- Page 39 Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Current range calibration adjustment commands Step Command/procedure* Description :SOUR:CURR:RANG <Range> Select the source range. :SOUR:CURR -<Range> Establish negative polarity. DMM reading 1.** Read the actual output value on the DMM. Adjust the source function negative full scale. CAL:ADJ:SOUR <DMM_Reading>...
- Page 40 Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Current adjustment for the 4 A to 10 A ranges When adjusting the 4 A to 10 A ranges using a shunt resistor, use the following formula to calculate the current: Current = Voltage / Resistance Be sure to include shunt resistance uncertainty in the measurement uncertainty calculation when using a current shunt.
- Page 41 Model 2461 Calibration and Adjustment Manual Section 4: Adjustment :CAL:ADJ:SOUR -4.025 :CAL:ADJ:SENS -4.025 Set the current source to 0 A output using the :SOURce:CURRent command: :SOURce:CURRent 0.0 • Measure the voltage across the shunt resistor, and then calculate the current. ...
- Page 42 Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Current range calibration adjustment commands Step Command/procedure* Description Select the source range. :SOUR:CURR:RANG <Range> :SOUR:CURR -<Range> Establish negative polarity. DMM reading 1.** Using the DMM, measure voltage across the shunt resistor. (calculated I) = V (DMM reading 1) / R Calculate the shunt resistor current.*** :CAL:ADJ:SOUR <calculated I>...
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Page 43: Step 4. Digitizer Adjustment
Model 2461 Calibration and Adjustment Manual Section 4: Adjustment Step 4. Digitizer adjustment All digitizer ranges are adjusted with a single command: CALibration:DIGitize:ADJust:SENSe This step is an internal adjustment requiring about 10 seconds to complete. The Model 2461 does not source any output and there is no need to connect external equipment during this step. -
Page 44: Single-Range Adjustment
Section 4: Adjustment Model 2461 Calibration and Adjustment Manual Single-range adjustment Normally, the complete adjustment procedure should be performed to ensure that the entire instrument is properly adjusted. In some instances, however, you may want to adjust only certain ranges. To adjust only some of the ranges, complete the entire unlock, adjust, save, and lock procedure for the range or ranges to be adjusted. -
Page 45: Command Reference
Section 5 Command reference In this section: Introduction ................5-1 Model 2461 calibration verification and adjustment commands 5-1 Introduction This section contains detailed information about the Model 2461 remote calibration verification and adjustment commands, error messages, and methods to detect the end of each adjustment step. Adjustment (on page 4-1) for detailed calibration adjustment procedures. -
Page 46: Calibration:adjust:date
Section 5: Command reference Model 2461 Calibration and Adjustment Manual :CALibration:ADJust:DATE This command stores the user-specified adjustment date. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory Not applicable Usage :CALibration:ADJust:DATE <year>, <month>, <day> :CALibration:ADJust:DATE? <year>... -
Page 47: Calibration:adjust:sense
Model 2461 Calibration and Adjustment Manual Section 5: Command reference :CALibration:ADJust:SENSe This command adjusts the sense function. Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory Not applicable Usage CALibration:ADJust:SENSe <range> CALibration:ADJust:SENSe <negZero> CALibration:ADJust:SENSe <negFullScale> CALibration:ADJust:SENSe <posZero> CALibration:ADJust:SENSe <posFullScale>... -
Page 48: Calibration:adjust:sense:data
Section 5: Command reference Model 2461 Calibration and Adjustment Manual Example CAL:ADJ:SENS +2.00003 Adjust the 2 V sense range. Also see :CALibration:ADJust:SENSe:DATA? (on page 5-4) :CALibration:SAVE (on page 5-10) :CALibration:UNLock (on page 5-11) :CALibration:ADJust:SENSe:DATA? This command queries the calibration constants for the active sense range. Type Affected by Where saved... -
Page 49: Calibration:adjust:source
Model 2461 Calibration and Adjustment Manual Section 5: Command reference :CALibration:ADJust:SOURce This command adjusts the source function. Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory Not applicable Usage CALibration:ADJust:SOURce <range> CALibration:ADJust:SOURce <negZero> CALibration:ADJust:SOURce <negFullScale> CALibration:ADJust:SOURce <posZero> CALibration:ADJust:SOURce <posFullScale>... -
Page 50: Calibration:adjust:source:data
Section 5: Command reference Model 2461 Calibration and Adjustment Manual :CALibration:ADJust:SOURCe:DATA? This command queries the calibration constants for the active source range. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage CALibration:ADJust:SOURce:DATA? Details This command requests the calibration constants for the active range of the source function. -
Page 51: Calibration:digitize:adjust:sense
Model 2461 Calibration and Adjustment Manual Section 5: Command reference :CALibration:DIGitize:ADJust:SENSe This command adjusts the Model 2461 digitizer function. Type Affected by Where saved Default value Query only Not applicable Not applicable Not applicable Usage :CALibration:DIGitize:ADJust:SENSe Details This command must be sent after all other :CALibration:ADJust commands for all ranges have been completed successfully. -
Page 52: Calibration:lock
Section 5: Command reference Model 2461 Calibration and Adjustment Manual :CALibration:LOCK This command locks calibration constants. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory Usage CALibration:LOCK CALibration:LOCK? Query returns 0 = Calibration unlocked 1 = Calibration locked Details Use this command to prevent comprehensive adjustment. -
Page 53: Calibration:password
Model 2461 Calibration and Adjustment Manual Section 5: Command reference :CALibration:PASSword This command changes the calibration password. Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory KI002400 Usage CALibration:PASSword "<password>" <password> The calibration password; can contain up to 8 characters; default is KI2400 Details Use this command to change the calibration password, which is used to lock the calibration constants. -
Page 54: Calibration:save
Section 5: Command reference Model 2461 Calibration and Adjustment Manual :CALibration:SAVE This command saves calibration constants to nonvolatile memory after completing the adjustment procedure. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory Not applicable Usage :CALibration:SAVE :CALibration:SAVE? -
Page 55: Calibration:unlock
Model 2461 Calibration and Adjustment Manual Section 5: Command reference :CALibration:UNLock This command unlocks the calibration constants. Type Affected by Where saved Default value Command only Not applicable Nonvolatile memory Not applicable Usage :CALibration:UNLock "<password>" <password> The calibration password; the default password is KI002400 Details Use this command to unlock the calibration constants so that comprehensive adjustment can be done. -
Page 56: Calibration:verify:date
Section 5: Command reference Model 2461 Calibration and Adjustment Manual :CALibration:VERify:DATE This command stores the user-specified calibration verification date. Type Affected by Where saved Default value Command and query Not applicable Nonvolatile memory Not applicable Usage :CALibration:VERify:DATE <year>, <month>, <day> :CALibration:VERify:DATE? <year>... -
Page 57: Routine Maintenance
Section 6 Routine maintenance In this section: Introduction ................6-1 Line fuse replacement .............. 6-1 Introduction The information in this section describes routine maintenance that can be done by the operator. Line fuse replacement A fuse located on the Model 2461 rear panel protects the power line input of the instrument. Disconnect the line cord at the rear panel and remove all test leads connected to the instrument before replacing the line fuse. - Page 58 Section 6: Routine maintenance Model 2461 Calibration and Adjustment Manual 5. Use the screwdriver to lift the tab from the fuse drawer. 6. Slide the fuse drawer out. The fuse drawer does not pull completely out of the power module. 7.
- Page 59 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 • www.tek.com/keithley A Gr eater M easur e of C onfi dence 12/15...