Manufacturing Calibration Commands - Keithley 2750 Service Manual

Model 2750 Multimeter/Switch System Service Manual

Manufacturing calibration commands

NOTE
Three calibration steps are only performed at the factory or when the unit has been
repaired:
:CALibration:PROTected:AC:STEP14
:CALibration:PROTected:AC:STEP15
:CALibration:PROTected:DC:STEP0
:AC:STEP<14|15>
(CALibration:PROTected:AC:STEP<14|15>)
Purpose
Format
Parameters
Description
Example
:DC:STEP0
(:CALibration:PROTected:DC:STEP0)
Purpose
Format
Parameters
Description
Example
To perform these steps, manufacturing calibration must be enabled by pressing
and holding the OPEN key while turning on the power. See
To program individual AC manufacturing calibration steps.
:cal:prot:ac:step14 <Cal_voltage>
:cal:prot:ac:step15 <Cal_frequency>
<Cal_voltage> = 1 [1V nominal]
<Cal_frequency = 1E3 [1kHz nominal]
The :AC:STEP14 and :AC:STEP:15 commands program the two
manufacturing AC calibration steps. The appropriate signal must be
connected to the instrument when programming each step, as summa-
rized by the parameters listed above.
:CAL:PROT:AC:STEP14 1
:CAL:PROT:AC:STEP15 1E3 Program AC step 15.
To perform rear scanner terminal short-circuit calibration.
:cal:prot:dc:step0
None
: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.
:CAL:PROT:DC:STEP0
Calibration Reference
Section
1V AC at 3Hz
1V AC at 1kHz
Rear scanner terminal short circuit
Program AC step 14.
Perform rear short-circuit
calibration.
B-15
2.