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Model 2500 Service Manual Calibration 2-7

Resetting the calibration password

If you lose the calibration password, you can unlock calibration by shorting together the

CAL pads which are located on the display board. Doing so will also reset the password to

the factory default (002500, front panel; KI002500, remote).

See Section 5 for details on disassembling the unit to access the CAL pads. Refer to the

display board component layout drawing at the end of Section 6 for the location of the

CAL pads.

Viewing calibration dates and calibration count

When calibration is locked, only the UNLOCK and VIEW-DATES selections will be

accessible in the calibration menu. To view calibration dates and calibration count at any

time:

1. From normal display, press MENU, select CAL, and then press ENTER. The unit

will display the following:

CALIBRATION

UNLOCK EXECUTE VIEW-DATES 

2. Select VIEW-DATES and then press ENTER. The Model 2500 will display the

next and last calibration dates and the calibration count as in the following

example:

NEXT CAL: 04/15/2001

Last cal: 04/15/2000 Count: 0001

Keithley 2500 Service Manual

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