Technical data

Calibration Security Code

This feature allows you to enter a security code (electronic key) to

prevent accidental or unauthorized calibrations of the multimeter.

When you first receive your multimeter, it is secured. Before you can

adjust calibration constants you must unsecure the meter by entering

the correct security code. See example 1 in chapter 3, “Menu Tutorial,”

starting on page 53.

• The security code is set to “HP034401” when the multimeter 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 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 procedure on the following page for more information.

Chapter 4 Calibration Procedures

Calibration Security Code