Keithley 2701, Service Manual

Page: 155 / 168

B-16 Calibration Reference Model 2701 Service Manual
Manufacturing calibration commands
Three calibration steps are only performed at the factory or when the unit has been repaired:
:CALibration:PROTected:AC:STEP14
1V AC at 3Hz
:CALibration:PROTected:AC:STEP15
1V AC at 1kHz
:CALibration:PROTected:DC:STEP0
Rear scanner terminal short circuit
:AC:STEP<14|15>
(CALibration:PROTected:AC:STEP<14|15>)
Purpose
To program individual AC manufacturing calibration steps.
Format
:cal:prot:ac:step14 <Cal_voltage>
:cal:prot:ac:step15 <Cal_frequency>
Parameter
<Cal_voltage> = 1 [1V nominal]
<Cal_frequency = 1E3 [1kHz nominal]
Description
The
:AC:STEP14
and
:AC:STEP15
commands program the two
manufacturing AC calibration steps. The appropriate signal must be
connected to the instrument when programming each step, as summarized
by the parameters listed above.
Example
:CAL:PROT:AC:STEP14 1
Program AC step 14.
:CAL:PROT:AC:STEP15 1E3
Program AC step 15.
:DC:STEP0
(:CALibration:PROTected:DC:STEP0)
Purpose
To perform rear scanner terminal short-circuit calibration.
Format
:cal:prot:dc:step0
Parameter
None
Description
:STEP0
performs the rear scanner terminal short-circuit calibration step in
the manufacturing calibration procedure. Install an extender card with low-
thermal shorts on the output terminals installed in Slot 1 and select the rear
scanner inputs before sending this command.
Example
:CAL:PROT:DC:STEP0
Perform rear short-circuit calibration.