ASTM C1238-97(2021)

Standard Guide for Installation of Walk-Through Metal Detectors

SIGNIFICANCE AND USE
4.1 This guide is intended for use by the designers, evaluators, and users of walk-through metal detectors to be installed to screen persons entering or leaving a controlled access area. This guide is not meant to constrain design liberty but is to be used as a guide in the selection of location and installation of walk-through metal detectors.
SCOPE
1.1 Some facilities require that personnel entering designated areas be screened for concealed weapons and other metallic materials. Also, personnel exiting designated areas are often screened for metallic shielding material and other types of metallic contraband. Walk-through metal detectors are widely used to implement these requirements. This guide describes various elements to be considered when planning to install walk-through metal detectors.  
1.2 This guide is not intended to set performance levels, nor is it intended to limit or constrain operational technologies.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Dec-2020
• ICS: 13.310 - Protection against crime
• ICS: 13.320 - Alarm and warning systems
• Technical Committee: F12 - Security Systems and Equipment
• Drafting Committee: F12.60 - Controlled Access Security, Search, and Screening Equipment

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C1238 − 97 (Reapproved 2021)
Standard Guide for
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Installation of Walk-Through Metal Detectors
This standard is issued under the fixed designation C1238; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.3 National Fire Protection Associations (NPA) Docu-
4
ment:
1.1 Some facilities require that personnel entering desig-
NFPA-101-1988 Life Safety Code Handbook, Chapter 28,
nated areas be screened for concealed weapons and other
Industrial Occupancy
metallic materials.Also, personnel exiting designated areas are
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2.4 ANSI Standard:
often screened for metallic shielding material and other types
ANSI Z41.1-PT-1983 Class 50 and 75—For Non-ferrous
of metallic contraband. Walk-through metal detectors are
and Ferrous Safety Footwear
widely used to implement these requirements. This guide
2.5 National Institute of Law Enforcement and Criminal
describes various elements to be considered when planning to
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Justice (NILECJ) Standard:
install walk-through metal detectors.
NILECJ 0601.00 Standard for Design, Performance, and
1.2 This guide is not intended to set performance levels, nor
Allowable Magnetic Field Strength
is it intended to limit or constrain operational technologies.
3. Terminology
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.1 Definitions of Terms Specific to This Standard:
responsibility of the user of this standard to establish appro-
3.1.1 continuous-wave-type metal detector—a system gen-
priate safety, health, and environmental practices and deter-
erally employing one or more pairs of closely coupled coils;
mine the applicability of regulatory limitations prior to use.
one coil is electrically energized to establish an electromag-
1.4 This international standard was developed in accor-
netic field; the other detects disturbances in that field; in
dance with internationally recognized principles on standard-
operation, the coils are configured so that the person or object
ization established in the Decision on Principles for the
being screened passes through the field; when metal passes
Development of International Standards, Guides and Recom-
through the field, the field is modified by the magnetic and
mendations issued by the World Trade Organization Technical
electrical properties of the metal; any change in the field is
Barriers to Trade (TBT) Committee.
sensedbymeasuringoneormoreofmanypossibleparameters,
including mutual inductance, power loss, phase shift, fre-
2. Referenced Documents
quency shift, permeability, etc.
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2.1 NRC Document:
3.1.2 nuisance alarm—an alarm not caused by a weapon or
NUREG-1329 Entry/Exit Control At Fuel Fabrication Fa-
shielding material but by other causes such as outside interfer-
cilities Using or Possessing Formula Quantities of Strate-
ence or other operationally or environmentally induced stimu-
gic Special Nuclear Material
lus; in practice, these alarms are a nuisance because they are
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2.2 U.S. Government Documents:
not obvious and must be investigated and the cause eliminated.
DOE 5632.2A Physical Protection of Special Nuclear Mate-
3.1.3 pulse-wave-type metal detectors—a system in which
rials and Vital Equipment, February 9, 1988
briefcurrentpulsesaregeneratedintransmittercoilswhenthey
DOE 5633.3 Control and Accountabilityof Nuclear
are switched on; the electromagnetic field generated by these
Materials, February 3, 1988
pulses induces eddy currents in metallic objects in the field; the
eddy currents decay when the transmitter coils are shut off; the
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This guide is under the jurisdiction of ASTM Committee F12 on Security
decay of the eddy currents produces secondary voltages in the
Systems and Equipment and is the direct responsibility of Subcommittee F12.60 on
receiver coils, which are switched ononly whenthe transmitter
Controlled Access Security, Search, and Screening Equipment.
coilsareswitchedoff;thevoltagesinducedinthereceivercoils
Current edition approved Jan. 1, 2021. Published February 2021. Originally
approved in 1993. Last previous edition approved in 2012 as C1238 – 97 (2012). areprocessedandcomparedagainstabiasorbackgroundlevel.
DOI: 10.1520/C1238-97R21.
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Available from U. S. Nuclear Regulatory Commission (NRC), 11555 Rockville
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Pk., Rockville, MD 20852, http://www.nrc.gov. Available from National Fire Protection Association (NFPA), 1 Batterymarch
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Available from U.S. Government Printing Office, S
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