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B-2 Calibration Reference Model 2750 Multimeter/Switch System Service Manual

Introduction

This appendix contains detailed information about the various Model 2750 remote calibra-

tion commands. Section 2 of this manual covers detailed calibration procedures. For infor-

mation about additional commands to control other instrument functions, refer to the

Model 2750 User’s Manual.

Command summary

Table B-1 summarizes Model 2750 calibration commands.

Tab le B- 1

Remote calibration command summary

Command Description

:CALibration Calibration root command.

:PROTected All commands in this subsystem are protected by the

calibration lock (except queries and :CODE).

:CODE <up to 8 char. string> Calibration code or password (default: KI002750).

:COUNt? Request the number of times the unit has been

calibrated.

:INITiate Initiate calibration.

:LOCK Lock out calibration (opposite of enabling cal with

:CODE command).

:LOCK? Request comprehensive cal lock state. (0 = locked;

1 = unlocked.)

:SAVE Save cal constants to EEROM.

:DATE <year>, <month>, <day> Send cal date to 2750.

:DATE? Request cal date from 2750.

:NDUE <year>, <month>, <day> Send next due cal date to 2750.

:NDUE? Request next due cal date from 2750.

:DC DC cal steps.

:STEP0 Rear scanner terminals short step

:STEP1 Front terminal short circuit.

:STEP2 Open circuit.

:STEP3 <NRf> 10V DC step.

:STEP4 <NRf> –10V DC step.

:STEP5 <NRf> 100V DC step.

:STEP6 <NRf> 100 4-wire step.

:STEP7 <NRf> 10k 4-wire step.

:STEP8 <NRf> 100k 4-wire step.

:STEP9 <NRf> 1M 4-wire step.

Keithley 2750 Service Manual

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