HP 181A manual How to Use This Guide, Repair Strategy, Instrument Identification

Preface

This guide provides assembly-level service information for the HP 53131A and HP 53132A Universal Counters, and the HP 53181A Frequency Counter.

How to Use This Guide

Repair Strategy

This service guide is designed to isolate failures to the assembly level only.

The HP 53131A/132A/181A Counter can be returned to Hewlett-Packard (HP) for all service work, including troubleshooting, and verifying specifications. Contact your nearest HP Sales and Service Office for more details.

Note: there is an Express Repair/Performance Calibration Service for USA customers if downtime is critical. You can receive your repaired Counter via overnight shipment. Just call 800-403-0801 and ask for Express Repair/Performance Calibration Service. When your Counter is repaired, it will be returned via overnight shipment at no extra charge.

If you decide to service the Counter yourself, use the troubleshooting procedures in Chapter 2 (Service) and the disassembly and reassembly procedures in Chapter 3 (Replacing Assemblies). Then use the calibration instructions in Chapter 2 to calibrate the Counter for peak-performance operation, and finally perform the complete performance tests in Chapter 1 to verify the Counter’s specifications.

Instrument Identification

Instrument identification is made from the serial number on the rear panel of the Counter. HP uses a two-part serial number with the first part (prefix) identifying a series of instruments and the second part (suffix) identifying a particular instrument within a series. An HP-assigned alpha character between the prefix and suffix identifies the country in which the instrument was manufactured.

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