4 Calibration Procedures
78 Keysight 33210A Service Guide
Calibration Security
This feature allows you to enter a security code to prevent accidental
or unauthorized adjustments of the instrument. When you first receive your
instrument, it is secured. Before you can adjust the instrument,
you must unsecure it by entering the correct security code.
See “To Unsecure and Secure for Calibration” on page 44 for a procedure to enter
the security code from the front panel. Use the CAL:SEC:STAT ON command to
enter the security code using the remote interface.
– The security code is set to AT33210A when the instrument is shipped from the
factory. The security code is stored in non-volatile memory, and does not
change when power has been off, after a Factory Reset (*RST command), or
after an Instrument Preset (SYSTem:PRESet command).
– The security code may contain up to 12 alphanumeric characters.
The first character must be a letter, but the remaining characters
can be letters, numbers, or an underscore ( _ ). You do not have to
use all 12 characters but the first character must always be a letter.
To Unsecure the Instrument Without the Security Code
To unsecure the instrument without the correct security code, follow the steps
below. See “To Unsecure and Secure for Calibration” on page 44. See
“Electrostatic Discharge (ESD) Precautions” on page 116 before beginning this
procedure.
1 Disconnect the power cord and all input connections.
If you forget your security code, you can disable the security feature by applying
a temporary short inside the instrument as described below.
If you do not have a record of the security code, there are two codes you may
wish to try before you use the procedure below. First try AT33210A (the factory
default code). If that code does not work, you may wish to try the single letter A
as the security code. If someone has re-secured calibration without entering a
new code, the default code is the letter A.
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