Chapter 3 Front-Panel Operation
Calibration Overview
56
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 “HP003633”* or “HP003634”** 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 pages.
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.
*For HP E3633A Model **For HP E3634A Model
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