Keithley 6482 - Viewing Calibration Dates and Calibration Count; Calibration Adjustment Errors; Front-Panel Error Reporting; Remote Error Reporting

6482-901-01 Rev. A / August 2012 Return to Section Topics 17-17
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual Section 17: Calibration
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 the MENU key, select CAL, and then press the ENTER key. The
instrument will display the following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES 
2. Select VIEW-DATES and then press the ENTER key. The Model 6482 will display the next and
last calibration dates and the calibration count, as shown in the following example:
NEXT CAL: 07/31/2013
Last cal: 07/31/2012 Count: 0001
Calibration adjustment errors
The Model 6482 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 A). The instrument will then prompt you to repeat the calibration
step that caused the error.
Remote error reporting
You can detect errors from a remote interface 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 6482 will respond with the error
number and a text message describing the error. See Appendix A for details.
Aborting calibration steps
To abort a calibration step from the front-panel, press the EXIT key. To abort a calibration step over
a remote interface, send the :ABORt command.
Front-panel calibration
The front-panel calibration procedure described below calibrates all functions. Note that each
function and range is separately calibrated, and the procedure must be performed in the order
shown.
Step 1. Prepare the Model 6482 for calibration adjustment
1. Turn on the Model 6482 and the calibration equipment, and allow them to warm up for at least
one hour before performing calibration.
2. Press the MENU key, select CAL, and then press the ENTER key. Select UNLOCK, and then
press the ENTER key. The instrument will display the following:
PASSWORD:
Use , , , , ENTER or EXIT.