3 Features and Functions
124 Keysight 34420A User’s Guide
To Change the Security Code To change the security code, you must first
unsecure the meter, and then enter a new code. Make sure you have read the
security code rules on page 121 before attempting to secure the meter.
– Front-Panel operation: To change the security code, first make sure that the
meter is unsecured. Select the “parameter” level of the UNSECURED
command, enter the new security code, then press Menu Enter. Changing the
code from the front panel also changes the code as seen from the remote
interface.
– Remote interface operation:
CALibration:SECure:CODE <new code>
To change the security code, first unsecure the meter using the old security
code. Then, enter the new code. For example,
CAL:SEC:STAT OFF, KT034420 unsecure with old code
CAL:SEC:CODE KT010495 enter new code
Calibration Count
You can determine the number of times that your meter has been calibrated.
Since the value increments by one for each calibration point, a complete
calibration increases the value by several counts.
– The calibration count is stored in non-volatile memory, and does not change
when power has been off or after a remote interface reset. Your meter was
calibrated before it left the factory. When you receive your meter, read the
count to determine its initial value.
– The calibration count increments up to a maximum of 32,767 after which it
wraps-around to 0.
– Front-Panel operation: read the calibration count under the 3: CAL COUNT
command in the CALibrate menu.
– Remote operation: use the following command:
CALibration:COUNt?
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