Agilent Technologies 34420A User Manual page 111

Chapter 3 Features and Functions
Calibration
To Secure Against Calibration You can secure the meter against
calibration either from the front panel or remote interface. The meter is
secured when shipped from the factory, and the security code is set to
"HP034420".
Be sure to read the security code rules on page 107 before attempting to
secure the meter.
Front-panel operation:
1: UNSECURED
If the meter is unsecured, you will see the above command when you
go into the CAL MENU. To secure the meter, select the "parameter"
level of the UNSECURED command, enter the security code, then
press Menu Enter.
000000 CODE
When you go to the "commands" level in the CAL MENU again, you
will notice that the meter is secured. Notice also that the
2: CALIBRATE command is now hidden and you cannot perform a
calibration.
1: UNSECURED
Remote interface operation:
CALibration:SECure:STATe {OFF|ON},< code >
To secure the meter, send the above command with the same code as
used to unsecure. For example,
CAL:SEC:STAT ON, HP034420
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