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5. Use the up and down RANGE keys to toggle between Y (yes) and N (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 code

To unlock calibration via remote, send the following command:

:CAL:PROT:CODE '<code>'

For example, the following command uses the default code:

:CAL:PROT:CODE 'KI002182'

NOTE To change the calibration code, first sent the present code, then send the new code. If

you change the first two characters of the password to something other than "KI", you

will not be able to unlock calibration from the front panel.

Resetting the calibration code

If you lose the calibration code, 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 (KI002182).

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.

Calibration errors

The Model 2182 checks for errors after each calibration step, minimizing the possibility that

improper calibration may occur due to operator error.

Front panel error reporting

If an error is detected during comprehensive calibration, the instrument will display an

appropriate error message (see Appendix B). The unit will then prompt you to repeat the

calibration step that caused the error. If a calibration step fails, error +500 (calibration data

invalid) will occur. The calibration step must be repeated.

Remote error reporting

You can detect errors while in remote by testing the state of EAV (Error Available) bit (bit 2)

in the status byte. (Use the *STB? query to request the status byte.) Query the instrument for the

type of error by using the :SYST:ERR? query. The Model 2182 will respond with the error

number and a text message describing the nature of the error. See Appendix B for details.

Calibration 2-5

Keithley 2182 Service Manual

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