Keithley 2520, Service Manual, Page: 53 / 137

Model 2520 Pulsed Laser Diode Test System Service Manual Calibration 2-23
Remote calibration procedure
Step 1: Prepare the Model 2520 for calibration
1. With the power off, connect the Model 2520 to the controller IEEE-488 interface
or RS-232 port using a shielded interface cable.
2. Turn on the Model 2520 and the test equipment, and allow them to warm up for a
minimum of one hour before performing calibration.
3. If you are using the IEEE-488 interface, make sure the primary address of the
Model 2520 is the same as the address specified in the program you will be using
to send commands. (Use the COMM key to access the IEEE-488 address.)
4. Send the following command to unlock calibration:
:CAL:PROT:CODE ‘KI002520’