ANSI N42.34-2006 pdf download American National Standard Performance Criteria for Hand-Held Instruments for the Detection and Identification of Radionuclides
3.15 detection limits: The extremes of detection or quantification for the radiation of interest.
NOTE—The lower detection limit is the minimum statistically quantifiable instrument response or reading. The upper detection limit is the maximum level at which the instrument meets the required accuracy.
3.16 detector: A device or component designed to produce a quantifiable response to ionizing radiation normally measured electronically.
3.17 effective center: For a given set of irradiation conditions, the point within a detector where the response is equivalent to that which would be produced if the entire detector was located at the point.
3.18 effective range of measurement: Range of measurements within which the requirements of this standard are met.
3.19 energy dependence: Variation in instrument response as a function of radiation energy for a constant radiation type and exposure rate referenced to air.
3.20 exposure rate: The measure of ionization produced in air by x-ray or gamma-ray radiation.
NOTE—The unit of exposure rate is the Roentgen per hour, abbreviated in this standard as R/h.
3.21 false alarm: Alarm NOT caused by a radioactive source under the specified background conditions.
3.22 functional check: A frequently used qualitative check to determine that an instrument is operational and capable of performing its intended function.
NOTE—Such checks may include, for example, battery check, zero setting, or source response check.
3.23 indicated value: (A) A scale or decade reading. (B) The displayed value of the readout. See also:reading.
3.24 indication: Displayed signal from the instrument to the user conveying information such as scale or decade, status, malfunction or other critical information.
3.25 influence quantity: Quantity that may have a bearing on the result of a measurement without being the subject of the measurement.
3.26 innocent alarm: An alarm resulting from an actual increase in radiation level, but for reasons that are not due to the detection of illicit radioactive materials.
NOTE—Also called a nuisance alarm.
3.27 instrument: A complete system consisting of one or more assemblies designed to quantify one or more characteristics of ionizing radiation or radioactive material.
3.28 instrument hour: That period of time that the instrument is powered on and operating.
NOTE— The number of operating instruments multiplied by the amount of time they are operating (e.g.,eight instruments operating for 3.75 h is equivalent to 30 instrument hours).
3.29 interdiction: Stopping the illicit or inadvertent movement of radioactive material that has been discovered as a result of radiation detection or measurement.
3.30 monitoring: Means provided to continuously indicate the state or condition of a system or assembly.
NOTE—May also be used for the real-time measurement of radioactivity or radiation levels.
ANSI N42.34-2006 pdf download
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