Keithley 2701, Service Manual

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2-4 Calibration Model 2701 Service Manual
Calibration code
Before performing comprehensive calibration, you must first unlock calibration by entering
the appropriate calibration code.
Front panel calibration code
For front panel calibration, follow these steps:
1. Access the calibration menu by pressing SHIFT then TEST, then use the up or down
range key to display TEST: CALIB. Press ENTER and note that the instrument displays
the following:
CAL: DATES
2. Use the up or down range key to scroll through the available calibration items until the
unit displays RUN, then press ENTER.
3. The Model 2701 then prompts you to enter a code:
CODE? 000000
(The factory default code is 002701.) Use the left and right arrow keys to move among
the digits; use the up range key to increment numbers and press the down range key to
specify alphabetic letters. Confirm the code by pressing ENTER.
4. The Model 2701 allows you to define a new calibration code. Use the up and down
range keys to toggle between yes and no. Choose N if you do not want to change the
code. Choose Y if you want to change the code. The unit then prompts you to enter a
new code. Enter the code and press ENTER.
Remote calibration code
If you are performing calibration over the Ethernet port or the RS-232 port, send this com-
mand to unlock calibration:
:CAL:PROT:CODE '<8-character string>'.
The default code command is:
:CAL:PROT:CODE 'KI002701'.
To change the code via remote, simply send the :CAL:PROT:CODE command twice; first
with the present code and then with the new code.