Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin

SCOPE
1.1 This test method covers the determination of the insulation value of clothing ensembles. It describes the measurement of the resistance to dry heat transfer from a heated manikin to a relatively calm, cool environment.
1.1.1 This is a static test that provides a baseline clothing measurement on a standing manikin.
1.1.2 The effects of body position and movement are not addressed in this test method.
1.2 The insulation values obtained apply only to the particular ensembles evaluated and for the specified environmental conditions of each test, particularly with respect to air movement.
1.3 The values stated in either clo or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other.
1.4 The evaporative resistance of a clothing ensemble can be measured in accordance with Test Method F 2370.
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 consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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30-Nov-2004
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ASTM F1291-04 - Standard Test Method for Measuring the Thermal Insulation of Clothing Using a Heated Manikin
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Designation:F1291–04
Standard Test Method for
Measuring the Thermal Insulation of Clothing Using a
1
Heated Manikin
This standard is issued under the fixed designation F 1291; 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.
INTRODUCTION
Thetypeofclothingwornbypeopledirectlyaffectstheheatexchangebetweenthehumanbodyand
the environment. The heat transfer is both sensible (conduction, convection, and radiation) and latent
(evaporation). The insulation provided by a clothing ensemble is dependent upon the designs and
materials used in the component garments, the amount of body surface area covered by clothing,
distribution of the fabric layers over the body, looseness or tightness of fit, and the increased surface
area for heat loss. Insulation measurements made on fabrics alone do not take these factors into
account. Measurements of the resistance to dry heat loss provided by clothing can be used to
determine the thermal comfort or stress of people in cold to comfortable environments. However, the
moisture permeability of clothing is more important in environmental conditions where heat balance
can only be achieved by the evaporation of sweat.
1. Scope establish appropriate safety and health practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 This test method covers the determination of the insu-
lation value of clothing ensembles. It describes the measure-
2. Referenced Documents
ment of the resistance to dry heat transfer from a heated
2
2.1 ASTM Standards:
manikin to a relatively calm, cool environment.
D 1518 Test Method for Thermal Transmittance of Textile
1.1.1 This is a static test that provides a baseline clothing
Material
measurement on a standing manikin.
F 1494 Terminology Relating to Protective Clothing
1.1.2 The effects of body position and movement are not
F 2370 Test Method for Measuring the Evaporative Resis-
addressed in this test method.
tance of Clothing Using a Sweating Manikin
1.2 The insulation values obtained apply only to the par-
3
2.2 ASHRAE Standards:
ticular ensembles evaluated and for the specified environmen-
ASHRAE 55-1981 Thermal Environmental Conditions for
tal conditions of each test, particularly with respect to air
Human Occupancy
movement.
Handbook of Fundamentals, Chapter 8 on Physiological
1.3 The values stated in either clo or SI units are to be
Principles, Comfort and Health
regardedseparatelyasstandard.Withinthetext,theSIunitsare
4
2.3 ISO Standards:
shown in brackets. The values stated in each system are not
ISO 7730 1994 Moderate Thermal Environments—
exact equivalents; therefore, each system shall be used inde-
Determination of the PMV and PPD Indices and Specifi-
pendently of the other.
cation of the Conditions for Thermal Comfort
1.4 The evaporative resistance of a clothing ensemble can
ISO 9920 1995 Ergonomics of the Thermal Environment—
be measured in accordance with Test Method F 2370.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
responsibility of the user of this standard to consult and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1 3
This test method is under the jurisdiction of ASTM Committee F23 on Available from American Society of Heating, Refrigerating, and Air-
Protective Clothing and is the direct responsibility of Subcommittee F23.60 on Conditioning Engineers, Inc. (ASHRAE), 1791 Tullie Circle, NE, Atlanta, GA
Human Factors. 30329.
4
Current edition approved December 1, 2004. Published December 2004. Origi- Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
nally approved in 1990. Last previous edition approved in 1999 as F 1291 - 99. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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F1291–04
Estimation of the Thermal Insulation and Evaporation evaluate which departures from the instructions given in this
Resistance of a Clothing Ensemble test method are significant. Standardization of the method
reduces, but does not eliminate, the need for such technical
3. Terminology
knowledge. Report any departures with the results.
4.3 Report the insulation values in SI units or clo units as
3.1 Definitions:
standard procedure. Conversion factors to other units are given
3.1.1
...

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