Preface

Instruments Covered by this Guide

This guide applies directly to HP 53131A, HP 53132A, and HP 53181A Counters that have the same serial number prefix(es) shown on the title page. If the serial number prefix of your Counter differs from that listed on the title page of this guide, then there may be differences between this guide and your instrument.

Instruments having a higher serial prefix are covered when required by one or more manual-change sheets included with this guide. If a required change sheet is missing, contact your nearest HP Sales Office listed at the back of this guide. Instruments having a serial prefix lower than that listed on the title page are covered in Chapter 6, “Backdating.”

Assembly-Level Service Guide Organization

This assembly-level service guide consists of a table of contents, preface, eight chapters and an index. The page running headers identify the chapters and sections of this manual. The chapter contents are summarized as follows:

Chapter 1, “Performance Tests,” provides procedures that verify the Counter operates properly and meets the HP 53131A/132A or HP 53181A specifications given in Chapter 7, “HP 53131A/132A Specifications,” or Chapter 8, “HP 53181A Specifications,” in this guide.

Chapter 2, “Service,” is divided into seven main sections that provide instructions for returning the Counter to HP for service, calibrating the Counter, and troubleshooting the assemblies in the Counter.

Chapter 3, “Replacing Assemblies,” provides procedures for replacing defective assemblies and/or modules in the Counter.

Chapter 4, “Retrofitting Options,” provides field-installation procedures that help you install options into the Counter.

Chapter 5, “Replaceable Parts,” lists the replaceable parts contained in the Counter, and explains how to order replacement parts for your Counter.

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Assembly-Level Service Guide