Power Meter Operation

Contacting Hewlett-Packard

Whenever you contact Hewlett-Packard about your power meter have a complete serial number available. This will ensure that you obtain the most complete and accurate service information. The serial number can be obtained by:

•interrogating the power meter over the HP-IB using the *IDN? command.

•from the front panel by selecting

Version .

•from the serial number label.

System

, More , Service ,

Inputs

The serial number label is attached to the rear of each Hewlett-Packard instrument. This label has two instrument identification entries. The first provides the instruments serial number and the second provides the identification number for each option built into the instrument.

The serial number is divided into two parts: the prefix (two letters and the first four numbers), and the suffix (the last four numbers).

•The prefix letters indicate the country of manufacture. This code is based on the ISO international country code standard, and is used to designate the specific country of manufacture for the individual product. The same product number could be manufactured in two different countries. In this case the individual product serial numbers would reflect different country of manufacture codes. The prefix also consists of four numbers. This is a code identifying the date of the last major design change.

•The suffix indicates an alpha numeric code which is used to ensure unique identification of each product throughout Hewlett-Packard.

SERIAL NUMBER

SER UK12345678

OPT

HP EPM-442A User’s Guide

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