This standard establishes specific requirements for installed instruments that measure dose@ dose equivalent@ dose rate@ or dose equivalent rate and for installed instruments used to detect and/or measure the presence of radioactive contamination. This standard does not address criticality detection systems.For this standard@ installed radiation protection instruments are instruments that operate using line power primarily. They are also not hand-carried during use@ and they are typically operated at a fixed location. Instrument types include@ but are not limited to@ area@ equipment@ sample@ personnel@ and waste monitors.Special purpose instrumentation@ such as emergency post-accident radiological monitors@ fall under the scope of other related ANSI standards. This standard is intended to supplement rather than replace them.Low-range (i.e.@ near background to < 10 ?Sv/h) instruments@ air monitors@ and air samplers are addressed by ANSI N323B and ANSI N323C@ respectively.Throughout this standard@ three verbs have been used to show the degree of rigor intended for each specific criterion. The word shall is used to denote a requirement@ the word should to denote a recommendation@ and the word may to denote a permissible practice.