Changing The Security Code - Agilent Technologies 3458A Calibration Manual

Changing the
Security Code
8 Chapter 1 3458A Calibration Introduction
is shipped from the factory with its security code set to 3458. Specifying 0
for the new_code in the SECURE command disables the security feature
making it no longer necessary to enter the security code to perform a
calibration or autocal.
The security code is changed with the SECURE command which has the
following syntax:
SECURE old_code, new_code [,acal_secure]
The procedure for changing the security code is as follows:
1. Access the SECURE command. (Press the blue SHIFT key, then the
S menu key. If using the full command menu use the
display the SECURE command).
2. Enter the old security code, the delimiter (,) and the new security code.
If you want to control the auto calibration of the multimeter, enter
another delimiter (,) and the acal_secure parameter ON. The
instrument is shipped from the factory with the security code set to
3458 and the acal_secure parameter set to ON (security code required
to do an acal).
3. Press the Enter key. The instrument will now respond to the new
security code.
In the event the security code is unknown, the security feature can be disabled
to permit a new code to be entered. Perform the following procedure to
disable the current unknown security code and enter a known code:
a. Turn the instrument off and remove the line cord and all external
inputs to the 3458A.
b. Remove the top cover.
1. Remove both rear handle brackets with a #2 Pozidrive.
2. Remove the rear bezel by loosening the four #15 TORX
screws.
3. With the back of the instrument facing you, remove the #10
TORX screw securing the top cover to the right side.
4. Remove the top cover.
c. Change the position of jumper JM600 on the 03458-66505
assembly, or option 001 03458-66515 assembly from the left
position to the right position (front of instrument facing you).
d. Reconnect the power and turn the instrument on.
e. Access the SECURE command (Press the blue SHIFT key then the
S MENU key. Use the
¯
scroll key if in the full command menu to
¯
scroll key to