Detecting Calibration Step Completion; Using The *Opc Command - Keithley 2182 Service Manual

Detecting calibration step completion

When sending remote calibration commands, you must wait until the instrument completes
the current operation before sending another command. You can use either *OPC? or *OPC to
help determine when each calibration step is completed.

Using the *OPC command

The *OPC (operation complete) command can be used to detect the completion of a
calibration step. The following command sequence shows how to use *OPC with a calibration
step:
After sending *OPC, use the serial poll (SPE, SPD) sequence to monitor the RQS bit of the
serial poll (status) byte of the Model 2182. When the calibration step is completed, a service
request will be generated and set the RQS bit, indicating that the next calibration step can now
be performed.
NOTE
*CLS
*ESE 1
*SRE 32
:CAL:PROT:STEP1;*OPC
After a service request is generated, it must be cleared by reading the event status
register by sending the following command:
*ESR?
Calibration Reference
' Clears all event registers and error queue.
' Enables OPC bit in standard event register.
' Enables ESB bit in status byte register.
' Perform calibration step and send *OPC.
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