Agilent Technologies E3631-90002, User Manual, Page: 59 / 166

Chapter 3 Front-Panel Operation
Calibration Overview
58
Calibration Overview
This section gives an overview of the calibration features of the power
supply. For more detailed discussion of the calibration procedures, see the
Service Guide
.
Calibration Security
This feature allows you to enter a security code to prevent accidental or
unauthorized calibrations of the power supply. When you first receive your
power supply, it is secured. Before you can calibrate the power supply, you
must unsecure it by entering the correct security code.
•
The security code is set to “HP003631” when the power supply is shipped
from the factory
. The security code is stored in non-volatile memory, and
does not change when power has been off or after a remote interface reset.
• To secure the power supply from the remote interface , the security code
may contain up to 12 alphanumeric characters as shown below. The first
character
must be a letter , but the remaining characters can be letters or
numbers. You do not have to use all 12 characters but the first character
must always be a
letter
.
A _ _ _ _ _ _ _ _ _ _ _ (12 characters)
• To secure the power supply from the remote interface so that it can be
unsecured from the front panel, use the eight-character format shown
below. The first two characters must be “H P” and the remaining
characters must be numbers. Only the last six characters are recognized
from the front panel, but all eight characters are required.
To unsecure
the power supply from the front panel, omit the “H P” and enter the
remaining numbers as shown on the following
H P _ _ _ _ _ _ ( 8 characters )
If you forget your security code, you can disable the security feature by
adding a jumper inside the power supply, and then entering a new code.
See the Service Guide for more information.