Features and Functions
3
Keysight 34980A Mainframe User’s Guide
201
To Change the Security Code
To change the security code, you must first unsecure the instrument, and then
enter a new code.
You can change the security code from the remote interface
only
. Make sure you have read the security code rules described on
before attempting to change the security code.
Remote Interface Operation:
To change the security code, unsecure the
instrument using the old security code. Then enter the new code as shown below.
Calibration Count
You can query the instrument to determine how many calibrations have been
performed on the entire mainframe, the digital modules, or the internal DMM
(
remote interface operation only
). Note that your instrument was calibrated before
it left the factory. When you receive your instrument, be sure to read the various
counts to determine the initial values.
– The calibration count is stored in non-volatile memory in the mainframe, and
does not change when power has been off, after a Factory Reset (
*RST
command), or after an Instrument Preset (
SYSTem:PRESet
command).
– The calibration counts increments up to a maximum of 4,294,967,295 after
which they roll over to “0”. Since the value increments by one for each
calibration point, a complete calibration may increase the value by many
counts.
– The calibration count is also incremented with calibrations of DAC channels on
the 34951A Isolated DAC Module and 34952A Multifunction Module.
Remote Interface Operation:
CALibration:COUNt?
CAL:SECURE:STATE OFF,AT34980
CAL:SECURE:CODE SN123456789
Unsecure with old code
Enter new code
