ASTM F2069-00

Standard Practice for Evaluation of Explosives Vapor Detectors (Withdrawn 2009)

SIGNIFICANCE AND USE
This practice establishes a method for characterizing explosives vapor detectors in the laboratory. The practice does not set performance requirements.
This practice is intended for use by the manufacturers of explosives vapor detection equipment and any organization that has the facilities and expertise to perform vapor calibrations. This practice relies upon the use of an explosives vapor generator unit to determine the applicable performance levels of the explosives vapor detectors.
This practice provides a method for evaluation of the following parameters:
3.3.1 Interferent free minimum alarm level,
3.3.2 Probability of detection,
3.3.3 False positive ratio,
3.3.4 False negative ratio,
3.3.5 Interference equivalent,
3.3.6 Temperature and humidity effects,
3.3.7 Sample time,
3.3.8 Response time,
3.3.9 Total analysis time,
3.3.10 Sample throughput, and  
3.3.11 Overload level.
Each user or evaluator may choose to evaluate a detector only for those parameters of interest to them.
SCOPE
1.1 This practice is for the laboratory evaluation and selection of explosives vapor detectors.
WITHDRAWN RATIONALE
This practice is for the laboratory evaluation and selection of explosives vapor detectors.
Formerly under the jurisdiction of Committee F12 on Security Systems and Equipment, this practice was withdrawn in January 2009 in accordance with section 10.5.3.1 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 09-Nov-2000
• Withdrawal Date: 27-Jan-2009
• ICS: 13.230 - Explosion protection
• ICS: 71.100.30 - Explosives. Pyrotechnics and fireworks
• Technical Committee: F12 - Security Systems and Equipment
• Drafting Committee: F12.60 - Controlled Access Security, Search, and Screening Equipment

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F2069–00
Standard Practice for
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Evaluation of Explosives Vapor Detectors
This standard is issued under the fixed designation F 2069; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.1.10 sample throughput—number of distinguished
samples that can be obtained and processed by the detector
1.1 This practice is for the laboratory evaluation and selec-
system in a given time period.
tion of explosives vapor detectors.
2.1.11 sample time—amount of time it takes to obtain a
2. Terminology
sufficient sample for introduction into the explosives detector.
2.1.12 span drift—variance with time of the detector re-
2.1 Definitions:
sponse to the upper calibration concentration level.
2.1.1 clear down time—time required for the detector to
2.1.13 temperature and humidity effects—effect of tempera-
produce no alarm at the IFMAL after an overload level.
ture and humidity on the stability and drift of the zero and span
2.1.2 false negative ratio—one minus the probability of
calibration of the detector.
detection.
2.1.14 total analysis time—total elapsed time from the
2.1.3 false positive ratio—ratio of the number of positive
sampling start until the system outputs a result. It is the sum of
alarms to the total number of challenges when no explosives
the sample time and response time.
vapor is present, where the number of challenges is large and
the instrument is set at the IFMAL.
3. Significance and Use
2.1.4 interferent—nonexplosive substance, other than the
3.1 This practice establishes a method for characterizing
explosive being detected, that can mask the explosives and
explosives vapor detectors in the laboratory. The practice does
produce a false negative decision or is identified as an
not set performance requirements.
explosive, producing a false positive decision.
3.2 This practice is intended for use by the manufacturers of
2.1.5 interferent equivalent response—positive or negative
explosives vapor detection equipment and any organization
response caused by a substance other than the explosive being
that has the facilities and expertise to perform vapor calibra-
measured, and expressed in explosives equivalent concentra-
tions. This practice relies upon the use of an explosives vapor
tion units.
generator unit to determine the applicable performance levels
2.1.6 interferent free minimum alarm level (IFMAL)—alarm
of the explosives vapor detectors.
level that provides a 95 % probability of detection at confi-
3.3 This practice provides a method for evaluation of the
dence level of 95 %, at that setpoint, and no greater than 5 %
following parameters:
false positives, at confidence level of 95 %, when challenged
3.3.1 Interferent free minimum alarm level,
with explosive free air at that setpoint.
3.3.2 Probability of detection,
2.1.7 overload level—that concentration that upon recycle
3.3.3 False positive ratio,
of the detector in the absence of that mass, produces a signal
3.3.4 False negative ratio,
above the minimum alarm level.
3.3.5 Interference equivalent,
2.1.8 probability of detection—ratio of the number of
3.3.6 Temperature and humidity effects,
alarms to the total number of challenges at a specified
3.3.7 Sample time,
explosivevaporconcentration,wherethenumberofchallenges
3.3.8 Response time,
is 60 or greater and the instrument is set at the IFMAL This
3.3.9 Total analysis time,
probability takes into account other system variables that affect
3.3.10 Sample throughput, and
performance, such as sample losses in inlets and preconcen-
3.3.11 Overload level.
trators.
3.4 Eachuserorevaluatormaychoosetoevaluateadetector
2.1.9 response time—the amount of time required for the
only for those parameters of interest to them.
detector to analyze the sample and produce a reading that is at
least 95 % of the full response for that sample.
4. Reference Vapor Generator
4.1 The reference calibrated explosives vapor generator
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This practice is under the jurisdiction of ASTM Committee F12 on Security
shall be one of the following vapor calibration units: (1) the
Systems and Equipment and is the direct responsibility of Subcommittee F12.60 on
pulsed vapor calibration unit constructed by the Idaho National
Controlled Access Security, Search, and Screening Equipment.
Current edition approved Nov. 10, 2000. Published January 2001. Engineering Laboratory, Idaho Falls, Idaho, described in detail
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F2069
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in Ref (1); (2) the continuou
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