Remote Calibration - Keithley 2750 Service Manual

2-14 Calibration

Remote calibration

Follow the steps in this section to perform comprehensive procedures via remote. See
Appendix B for a detailed list and description of remote calibration commands.
When sending calibration commands, be sure that the Model 2750 completes each step
before sending the next command. You can do so either by observing the front panel CAL-
IBRATING message, or by detecting the completion of each step over the bus. (See
Appendix
The procedures for calibrating the Model 2750 via remote include:
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NOTE
Preparing the Model 2750 for calibration
1.
2.
3.
4.
5.
B, "Detecting calibration step
Preparing the Model 2750 for calibration
Front panel short and open calibration
DC volts calibration
Resistance calibration
DC current calibration
AC volts calibration
AC current calibration
Programming calibration dates
Saving calibration constants
Locking out calibration
As with front panel calibration, you can choose to perform comprehensive, DC-
only, or AC-only calibration. Be sure to include a space character between each
command and parameter.
Connect the Model 2750 to the IEEE-488 bus of the computer using a shielded
IEEE-488 cable, such as the Keithley Model 7007, or connect the unit to a com-
puter through the RS-232 port using a straight-through 9-pin to 9-pin cable (use a
9-25-pin adapter if necessary).
Turn on the Model 2750, and allow it to warm up for at least two hours before per-
forming calibration.
Make sure the primary address of the Model 2750 is the same as the address speci-
fied in the program that you will be using to send commands. (Use the GPIB key.)
Unlock the calibration function by sending this command:
:CAL:PROT:CODE 'KI002750'
(The above command shows the default code, KI002750. Substitute the correct
code if changed.)
Send the following command to initiate calibration:
:CAL:PROT:INIT
Model 2750 Multimeter/Switch System Service Manual
completion.")