This document is an equipment standard developed by the Office of Law Enforcement Standards of the Nat. Institute of Standards & Technology (NIST). It is produced as part of the Law Enforcement & Corrections Standards & Testing Program of the Nat. Institute of Justice (NIJ). Because this NIJ standard is designed as a procurement aid, it is necessarily highly technical. Chapters: commonly used symbols & abbreviations; introduction: purpose of the Standard, & definitions; requirements for acceptance; performance testing procedures; field testing procedures; test objects description; report sheets; references; & five figures.