User`s guide

Description
This command unsecures or secures the instrument for calibration. To
unsecure the instrument, you must provide a security code to prevent
accidental or unauthorized calibrations of the instrument. Before you can
calibrate the instrument, you must unsecure it by entering the correct
security code.
For a more detailed discussion of the calibration procedures, see
the Agilent 34410A/11A/L4411A Service Guide. Please refer to the
Service Guide before attempting to calibrate the instrument.
Improper use of the CALibration commands can adversely affect the
accuracy and reliability of the instrument.