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Model 2461 Calibration and Adjustment Manual

Section 5: Command reference

2461-905-01 Rev. A / February 2016

5-11

: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>"

The calibration password; the default password is

KI002400

Details

Use this command to unlock the calibration constants so that comprehensive adjustment can be
done.

Send the

CALibration:LOCK?

query to determine if the calibration constants are locked.

Calibration constants are locked if

is returned; calibration constants are unlocked if

is returned.

The password parameter must be enclosed in quotation marks.

Example

:CAL:UNL "KI002400"

Unlock the calibration constants.

Also see

:CALibration:LOCK

(on page 5-8)

:CALibration:PASSword

(on page 5-9)

Содержание Keithley SourceMeter 2461

Страница 1: ...ithley 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 Tektronix Company A Greater Measure...

Страница 2: ...arks of Keithley Instruments All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments Other brand names are trademarks or registered trademarks of their r...

Страница 3: ...be connected to mains These instruments will be marked as category II or higher Unless explicitly allowed in the specifications operating manual and instrument labels do not connect any instrument to...

Страница 4: ...y disposed of according to federal state and local laws The WARNING heading in the user documentation explains dangers that might result in personal injury or death Always read the associated informat...

Страница 5: ...stment considerations 2 7 Calibration 3 1 Introduction 3 1 Calibration verification limits 3 2 Example source limits calculation 3 2 Example measure or digitize limits calculation 3 2 Setting the meas...

Страница 6: ...n constants 4 17 Step 7 Lock out adjustment 4 17 Single range adjustment 4 18 Command reference 5 1 Introduction 5 1 Model 2461 calibration verification and adjustment commands 5 1 CALibration ADJust...

Страница 7: ...2461 is a good solution for testing a wide variety of materials and devices in applications such as power semiconductors solar energy high brightness LEDs power conversion electrochemistry batteries...

Страница 8: ...you review the information in this documentation please contact your local Keithley Instruments office sales partner or distributor You can also call the corporate headquarters of Keithley Instruments...

Страница 9: ...idity of less than 70 percent unless otherwise noted Warm up period Allow the Model 2461 to warm up for at least one hour before conducting the calibration verification or adjustment procedures If the...

Страница 10: ...which varies for each function and range test point Description Ranges Digital multimeter DC voltage Keithley Instruments Model 2002 Digital Multimeter 200 mV 2 V 7 V 10 V 20 V 100 V Digital multimete...

Страница 11: ...g the equipment into standby does not guarantee that the outputs are powered off if a hardware or software fault occurs The maximum common mode voltage voltage between LO and chassis ground is 250 Vpe...

Страница 12: ...connections shown in the following figures The default voltage source protection value is 40 V Before testing the 100 V range be sure to assert the interlock Without the interlock asserted and the gre...

Страница 13: ...se either the front panel or rear panel connections shown in the following figures Figure 3 Front panel connections for the 1 A to 1 A ranges Figure 4 Rear panel connections for the 1 A to 1 A ranges...

Страница 14: ...ure 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 pa...

Страница 15: ...cation or adjustment procedures Make sure that the test equipment is properly warmed up and connected to the Model 2461 input and output jacks Ensure that either the front panel or rear panel terminal...

Страница 16: ...t meets factory specifications Determine if adjustment is required Verify that adjustment was done properly The information in this section is intended for qualified service personnel only Do not atte...

Страница 17: ...ding the result of step 3 to the setting value Example source limits calculation As an example of how source limits are calculated assume you are testing the 20 V DC range using a 95 percent of scale...

Страница 18: ...ts should not be made when the Model 2461 is in a limit overflow state For purposes of the calibration verification tests the Model 2461 can be taken out of an overflow state by raising the limit valu...

Страница 19: ...er aperture to AUTO and reading a single sample at a 1000 readings s sample rate This returns the average of 1000 1 S samples automatically in a single reading See the Model 2461 Reference Manual for...

Страница 20: ...e voltage function 12 DIG VOLT APER AUTO Set the aperture to match the sample rate 13 DIG VOLT SRAT 1000 Set to 1000 readings s 1 mS aperture 14 DIG COUNT 1 Digitize one sample when triggered 15 READ...

Страница 21: ...the average of 1000 1 S samples automatically in a single reading See the Model 2461 Reference Manual for more information about aperture sample rate and different methods of acquiring digitizer measu...

Страница 22: ...readings s 1 mS aperture 14 DIG COUNT 1 Digitize one sample when triggered 15 READ DIG Return the digitized reading of the source output 16 OUTP STAT OFF Turn off the source output 17 Calculate the s...

Страница 23: ...r cord from the rear of the Model 2461 before handling cables Putting the equipment into standby does not guarantee that the outputs are powered off if a hardware or software fault occurs 2 Turn on th...

Страница 24: ...14 DIG CURR SRAT 1000 Set 1000 readings s 1 mS aperture 15 DIG COUNT 1 Digitize one sample when triggered 16 READ DIG Return the digitized reading of the source output 17 OUTP STAT OFF Turn off the s...

Страница 25: ...a hardware or software fault occurs 2 Turn on the Model 2461 source output If the Model 2461 is not already warmed up allow it to warm up for at least one hour before continuing to the next step 3 On...

Страница 26: ...ing 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 resis...

Страница 27: ...to adjust the instrument The information in this section is intended for qualified service personnel only Do not attempt these procedures unless you are qualified to do so Some of these procedures ma...

Страница 28: ...Tage RANGe source_v_range Current NPLC sense 1 0 SENSe CURRent NPLC 1 0 Current measure range Same as source I range value SENSe CURRent RANGe source_i_range Count 10 SENSe AVERage COUNt 10 Filter con...

Страница 29: ...so view the calibration verification and adjustment dates and adjustment count on the front panel by pressing the MENU key and selecting System Information Adjustment errors The Model 2461 checks for...

Страница 30: ...____________________________ mV 2 V 2 0000 V ____________________________ V 0 0000 V ____________________________ V 2 0000 V ____________________________ V 0 0000 V ____________________________ V 7 V...

Страница 31: ...0 00 A ____________________________ A 1 mA 1 0000 mA ____________________________ mA 0 0000 mA ____________________________ mA 1 0000 mA ____________________________ mA 0 0000 mA _____________________...

Страница 32: ...A 5 A 5 0000 A ____________________________ A 000 00 A ____________________________ A 5 0000 A ____________________________ A 000 00 A ____________________________ A 7 A 7 0000 A ____________________...

Страница 33: ...CK Set or query whether or not the Model 2461 calibration constants are locked or unlocked CALibration UNLock password Unlock the Model 2461 calibration constants CALibration SAVE Save the updated cal...

Страница 34: ...el 2461 is not already warmed up allow it to warm up for at least one hour before continuing to the next step 3 On the DMM select the DC volts function 4 Initialize voltage adjustment by sending the c...

Страница 35: ...998 CAL ADJ SENS 1 998 Set the voltage source to 0 V output using the SOURce VOLTage command SOUR VOLT 0 0 Record the DMM reading in the Voltage calibration adjustment data table in Remote adjustment...

Страница 36: ...DMM 16 CAL ADJ SOUR DMM_Reading3 Adjust the sense function positive full scale 17 SYST ERR Check Model 2461 for errors 18 CAL ADJ SENS DMM_Reading3 Adjust the source function positive full scale 19 SY...

Страница 37: ...s not guarantee that the outputs are powered off if a hardware or software fault occurs 2 Turn on the Model 2461 source output If the Model 2461 is not already warmed up allow it to warm up for at lea...

Страница 38: ...025e 3 Set the current source to 0 A output using the SOURce CURRent 0 0 command Record the DMM reading in the Current calibration adjustment data table in Remote adjustment on page 4 4 Send the sourc...

Страница 39: ...e source function negative zero 11 SYSTem ERRor Check Model 2461 for errors 12 CAL ADJ SENS DMM_Reading Adjust the sense function negative zero 13 SYSTem ERRor Check Model 2461 for errors 14 SOUR CURR...

Страница 40: ...defaults SOUR FUNC CURR Select the source current mode FUNC CURR Select the measure function CAL UNL KI002400 Unlock the calibration constants ROUT TERM FRONT or REAR Select the front or rear panel te...

Страница 41: ...value using the SOURce CURRent command For example for the 4 A range SOUR CURR 4 Measure the voltage across the shunt resistor and then calculate the current Record the calculated current reading in...

Страница 42: ...e sense function negative zero 15 SYSTem ERRor Check Model 2461 for errors 16 SOUR CURR Range Establish positive polarity 17 DMM reading 3 Using the DMM measure voltage across the shunt resistor 18 ca...

Страница 43: ...must be separated by commas The allowable range for the year is from 1995 to 2094 the month is from 1 to 12 and the day is from 1 to 31 The calibration date is the same as a calibration without adjust...

Страница 44: ...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 No...

Страница 45: ...verification and adjustment commands are used to save calibration constants lock out calibration and program date parameters CALibration ADJust COUNt This command queries the number of times the Mode...

Страница 46: ...ails Use this command to store the adjustment date in the instrument nonvolatile memory Calibration constants must be unlocked with the CALibration UNLock command before sending this command You must...

Страница 47: ...command before sending this command To use this command 1 Set the source output value 2 Select the range to adjust 3 Send the CALibration ADJust SENSe command with each of the parameters in the usage...

Страница 48: ...ble Not applicable Not applicable Usage CALibration ADJust SENSe DATA Details This command requests the calibration constants for the active range of the sense function Constants returned are the posi...

Страница 49: ...CALibration UNLock command before sending this command If the specified parameters do not fit within the allowed ranges for the parameter error 222 Parameter data out of range is generated Once the M...

Страница 50: ...This command requests the calibration constants for the active range of the source function Constants returned are the positive full scale value the positive zero value the negative full scale value a...

Страница 51: ...have been completed successfully The Model 2461 does not source any output and there is no need to connect external equipment during this adjustment step This command initiates an internal operation...

Страница 52: ...vent comprehensive adjustment Send the CALibration LOCK query to determine if the calibration constants are locked Calibration constants are locked if 1 is returned calibration constants are unlocked...

Страница 53: ...n 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 To change the password you must first send th...

Страница 54: ...are retained indefinitely once saved The CALibration SAVE command is usually sent after all other adjustment steps have been completed but before sending the CALibration LOCK command Adjustment is onl...

Страница 55: ...ibration password the default password is KI002400 Details Use this command to unlock the calibration constants so that comprehensive adjustment can be done Send the CALibration LOCK query to determin...

Страница 56: ...ore the calibration verification date in the instrument nonvolatile memory Calibration constants must be unlocked with the CALibration UNLock command before sending this command You must send the CALi...

Страница 57: ...do so could expose the operator to hazardous voltages that could result in personal injury or death Use only the correct fuse type Failure to do so could result in injury death or instrument damage Us...

Страница 58: ...the fuse drawer 6 Slide the fuse drawer out The fuse drawer does not pull completely out of the power module 7 Snap the fuse out of the drawer 8 Replace the fuse 9 Push the fuse drawer back into the m...

Страница 59: ...operty 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 44...

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