Agilent Technologies 34401A manual Calibration Overview, Calibration Security, Characters

Chapter 3 Features and Functions

Calibration Overview

Calibration Overview

This section gives a brief introduction to the calibration features of the multimeter. For a more detailed discussion of the calibration procedures, see chapter 4 in the Service Guide.

Calibration Security

This feature allows you to enter a security code to prevent accidental or unauthorized calibrations of the multimeter. When you first receive

your multimeter, it is secured. Before you can calibrate the multimeter, 3 you must unsecure it by entering the correct security code.

•The security code is set to “HP034401” when the multimeter is shipped from the factory. The security code is stored in non-volatilememory, and does not change when power has been off or after a remote interface reset.

•To secure the multimeter 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 multimeter 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 “HP” 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 multimeter from the front panel, omit the “HP” 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 multimeter, and then entering a new code. See the Service Guide for more information.

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