Calibration Count - HP 34401A User Manual

Chapter 3 Features and Functions
Calibration Overview
Calibration To Change the Security Code To change the security code, you must
first unsecure the multimeter, and then enter a new code. Make sure
Security
you have read the security code rules on page 95 before attempting to
(continued)
secure the multimeter.
Front-Panel Operation: To change the security code, first make sure
that the multimeter is unsecured. Select the "parameter" level of the
UNSECURED
Menu Enter. Changing the code from the front panel also changes the
code as seen from the remote interface.
Remote Interface Operation:
To change the security code, first unsecure the multimeter using the
old security code. Then, enter the new code. For example,

Calibration Count

You can determine the number of times that your multimeter has been
calibrated. Your multimeter was calibrated before it left the factory.
When you receive your multimeter, read the count to determine its
initial value.
The calibration count is stored in non-volatile memory, and does not
change when power has been off or after a remote interface reset.
The calibration count increments up to a maximum of 32,767 after
which it wraps-around to 0. Since the value increments by one for
each calibration point, a complete calibration increases the value by
several counts.
Front-Panel Operation:
Remote Interface Operation:
98
command, enter the new security code, then press
CALibration:SECure:CODE <
CAL:SEC:STAT OFF, HP034401
CAL:SEC:CODE ZZ010443
3: CAL COUNT (CAL MENU)
CALibration:COUNt?
new code >
unsecure with old code
enter new code