Keithley 2000, Calibration Manual

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Calibration code
Comprehensive calibration code
Before performing comprehensive (user) calibration, you must first unlock calibration by en-
tering the appropriate calibration code.
Front panel calibration code
For front panel calibration, follow these steps:
1. Access the calibration menu by pressing SHIFT then CAL, and note that the instrument
displays the following:
CAL: DATES
2. Use the up or down range keys to scroll through the available calibration parameters until
the unit displays RUN, then press ENTER.
3. The Model 2000 then prompts you to enter a code. (The factory default code is 002000.)
Use the left and right arrow keys to move among the digits; use the up range key to in-
crement numbers, and press the down range key to specify alphabetic letters. Confirm
the code by pressing ENTER.
4. The Model 2000 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.
Programming the calibration code
If you are performing calibration over the IEEE-488 bus or the RS-232 link, send this com-
mand to unlock the calibration lock:
:CAL:PROT:CODE <up to 8-character string>
The default code command is:
:CAL:PROT:CODE 'KI002000'
Manufacturing calibration lock
To unlock manufacturing calibration, press and hold the front panel OPEN key while turning
on the power. See Manufacturing calibration at the end of this section for procedures.
Calibration 2-5