User`s guide

Chapter 3 Calibration Procedures

Calibration Security Code

This feature allows you to enter a security code (electronic key) 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. A procedure to unsecure the power supply is

given on the following page.

• 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 ‘‘HP’’

and enter the remaining numbers as shown on the following pages.

HP _ _ _ _ _ _ (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 procedure on page 63.

*For Agilent E3633A Model **For Agilent E3634A Model