Keithley SourceMeter 3A 2420 Service Manual page 117

:NDUE
(:CALibration:PROTected:NDUE)
Purpose
Format
Parameters
Query
Response
Description
Note
Example
:SENSE
(:CALibration:PROTected:SENSe)
Purpose
Format
Parameters
Description
Note
Example
To send the next calibration due date to the instrument.
:cal:prot:ndue <year>, <month>, <day>
<year> = 1997 to 2096
<month> = 1 to 12
<day> = 1 to 31
:cal:prot:ndue?
<year>, <month>, <day>
The :NDUE command allows you to store the date when calibration is next
due in instrument memory. You can read back the next due date by using the
:NDUE? query, or by using the front panel CAL menu.
The next due date parameters must be delimited by commas.
:CAL:PROT:NDUE 1998,11,20
To calibrate the sense function.
:cal:prot:sens <nrf>
See Table B-2 for recommended parameter ranges for optimum calibration.
The :CAL:PROT:SENS command calibrates the Model 2420 sense function.
To use this command, you must (1) program the source to the correct value,
(2) select the range being calibrated, and (3) send the :CAL:PROT:SENS
command for each parameter listed in Table B-2.
When the Model 2420 receives this command, it will attempt to place the pa-
rameter into one of the three parameter ranges summarized in Table B-2, de-
pending on the active :SENS:FUNC and range. If the parameter does not fit
into any of the three allowed ranges, an error number -222, "Parameter data
out of range" will be generated. Once the unit has successfully selected the
appropriate parameter range, it will then check to see if autorange for the ac-
tive :SENS:FUNC is enabled. If so, an error number -221, "Settings con-
flict" will be generated. If no error occurs, the active sense function/range
point will be calibrated using the corresponding parameter.
Note that parameters for a given sense function and range may be sent in any
order; however, once one :CAL:PROT:SENS command executes, the other
two must also be executed, or an error number -200, "Execution error" will
occur when the :CAL:PROT:SAVE command is processed at the end of the
calibration procedure.
:CAL:PROT:SENS 2
Command Reference
Send due date (11/20/98).
Calibrate 2V sense range.
B-5