NCJ Number
81352
Date Published
1981
Length
276 pages
Annotation
This book explains how various types of alarm systems work and provides detailed guidelines for servicing alarm systems and for identifying and solving problems associated with equipment, loops, and wiring.
Abstract
The basic electrical theory necessary to understand most alarm circuits is presented, the various types of test equipment available are described, and various problems that arise in alarm systems are outlined, with explanations provided of the kinds of protective loops found in the systems and the effect each type of trouble has in the various kinds of loops. Seven basic steps are presented to guide the reader through troubleshooting any kind of system, including unfamiliar equipment. Guidelines are provided for servicing simple alarm hardware such as controls, silent alarms, local bells, and batteries. The author next explains the more sophisticated intrusion detection systems, including ultrasonics, microwave, passive infrared, and the sound detection system. A concluding section describes good working practices in the alarm business, with emphasis on the needs for safe working habits and for effective customer relations. Photographs and extensive diagrams accompany the text. A detailed glossary and an index are also provided.