Keithley 2520, Service Manual, Page: 37 / 137

Model 2520 Pulsed Laser Diode Test System Service Manual Calibration 2-7
Unlocking calibration
Before performing calibration, you must first unlock calibration by entering or sending the
calibration password as explained in the following paragraphs.
Unlocking calibration from the front panel
1. Press the MENU key, then choose CAL, and press ENTER. The instrument will
display the following:
CALIBRATION
UNLOCK EXECUTE VIEW-DATES
䊳
SAVE LOCK CHANGE-PASSWORD
2. Select UNLOCK, then press ENTER. The instrument will display the following:
PASSWORD:
Use ,
䊳
, , , ENTER or EXIT.
3. Use the EDIT and keys to select the letter or number, and use the EDIT and
䊳
arrow keys to choose the position. (Press for letters; for numbers.) Enter the
present password on the display. (Front panel default: 002520.)
4. Once the correct password is displayed, press the ENTER key. You can then
proceed with the calibration procedure.
Unlocking calibration by remote
To unlock calibration via remote, send the following command:
:CAL:PROT:CODE '<password>'
For example, the following command uses the default password:
:CAL:PROT:CODE 'KI002520'