Keysight 33210A, Service Manual

Page: 73 / 131

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Chapter 4 Calibration Procedures
Calibration Security
4
4
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 41 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.
Note
If you forget your security code, you can disable the security feature by
applying a temporary short inside the instrument as described below.
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 41.
See “Electrostatic Discharge (ESD) Precautions” on page 106 before
beginning this procedure.
Note
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
.
1 Disconnect the power cord and all input connections.
2 Disassemble the instrument using the “General Disassembly Procedure”
on page 113.