Scope and purpose This standard establishes specific calibration and calibration-related requirements for portable radiation protection instruments used for detection and measurement of levels of ionizing radiation fields or levels of radioactive surface contamination. For purposes of this standard@ portable radiation protection instruments are those battery-powered instruments that are carried to a specific facility or location for use. Count rate meters and scalers@ when used with an appropriate detection probe for quantifying activity@ can be considered portable radiation protection instruments and should be treated as a single unit for the purposes of this standard. NOTE??These instruments are normally hand-held during operation and may include alarming capability.1 Portable radiation protection instruments provide direct readout of@ or readout proportional to@ dose or dose equivalent@ dose rate or dose equivalent rate@ or activity per unit area (i.e.@ active probe area). For the portable radiation protection instrumentation addressed in this standard@ the dose and dose equivalent rate range of operation is taken as background to 10 Gy/h (1000 rad/h) and background to 10 Sv/h (1000 rem/h). The activity-per-unit-area range for surface contamination monitors is taken as 0.01Bq/cm2 ?C ?? (60 dpm/100 cm2) or 0.05 Bq/cm2-??(300 dpm/100 cm2) to 200 Bq/cm2 (1.2 ?? 106 dpm/100 cm2). 1 Notes to text@ tables@ and figures are for information only and do not contain requirements needed to implement the standard. This standard defines the calibration and calibration-related requirements for portable rate and integrating devices for beta@ photon@ and neutron radiations@ and monitors for surface contamination (alpha@ beta@ and photon). Specific requirements for calibration of low-range i.e.@ near background to < 10 ??v/h (1 mrem/h)@ portable survey instruments will be provided for those instruments used to measure background level dose and dose equivalent rates. Portable radiation protection instruments intended for use in underwater survey and monitoring are included in this standard. Personnel dosimeters@ including electronic pocket dosimeters and hybrid pocket dosimeters/dose equivalent rate meters@ covered in ANSI N42.20 are outside the scope of this standard. Specific requirements for personal radiation detectors (PRDs)@ spectroscopic PRDs (SPRDs)@ and alarming electronic personal emergency radiation detectors (PERDs) are detailed in ANSI N42.32 [B9]@ ANSI N42.48 [B14]@ and ANSI N42.49A [B15]@ respectively. Radon monitoring instruments are not within the scope of this standard. Specific requirements for all air monitoring instruments are detailed in ANSI N323C. Specific requirements for installed instruments that measure dose or dose equivalent@ or dose rate or dose equivalent rate@ and AC-powered instruments used only to detect the presence of radioactive material and/or radioactive contamination are detailed in ANSI N323D@ ANSI N42.35 [B12]@ and ANSI N42.38 [B13]. Special-purpose instrumentation@ such as radionuclide identification instruments and emergency postaccident radiological monitors@ will fall under the scope of one or more related ANSI standards. For example@ ANSI N42.17A [B7] sets forth requirements for instrument performance. ANSI N42.33 [B10] and ANSI N42.34 [B11]@ provide requirements for Homeland Security portable instruments.