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ASTM C1189-02

Historical Revision

Standard Guide to Procedures for Calibrating Automatic Pedestrian SNM Monitors

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1.1 This guide covers calibrating the energy response of the radiation detectors and setting the discriminator and alarm thresholds used in automatic pedestrian special nuclear material (SNM) monitors.

1.2 Automatic pedestrian SNM Monitors and their application are described in Guide C 1112, which suggests that the monitors be calibrated and tested when installed and that, thereafter, the calibration should be checked and the monitor tested with SNM at three-month intervals.

1.3 Dependable operation of SNM monitors rests, in part, on an effective program to test, calibrate, and maintain them. The procedures and methods described in this guide may help both to achieve dependable operation and obtain timely warning of misoperation.

1.4 This guide can be used in conjunction with other ASTM standards. illustrates the relationship between calibration and other procedures described in standard guides, and it also shows how the guides relate to an SNM monitor user. The guides below the user in the figure deal with routine procedures for operational monitors. Note that Guide C 993 is an in-plant performance evaluation that is used to verify acceptable detection of SNM after a monitor is calibrated. The guides shown above the user in give information on applying SNM monitors (C 1112) and on evaluating SNM monitors (C 1169) to provide comparative information on monitor performance.


SNM monitors are an effective means to search pedestrians for concealed SNM. Maintaining monitor effectiveness rests on appropriate calibration and adjustment being part of a continuing maintenance program.

The significance of this guide for monitor users who must detect SNM is to describe calibration and adjustment procedures for the purpose.

The significance of this guide for monitor manufacturers is to describe calibration procedures, particularly for detecting forms of SNM that may not be readily available to them.

SDO ASTM: ASTM International
Document Number C1189
Publication Date Jan. 10, 2002
Language en - English
Page Count 9
Revision Level 02
Supercedes
Committee C26.12
Publish Date Document Id Type View
June 1, 2011 C1189-11 Revision
Jan. 10, 2002 C1189-02 Revision
Sept. 10, 1995 C1189-95 Revision
Nov. 1, 2018 C1189-11R18 Reaffirmation
Jan. 10, 2002 C1189-95R01 Reaffirmation