ASTM E1061-01(2022)
(Specification)Standard Specification for Direct-Reading Liquid Crystal Forehead Thermometers
Standard Specification for Direct-Reading Liquid Crystal Forehead Thermometers
ABSTRACT
This specification covers the requirements and test methods for direct-reading liquid crystal forehead thermometers, in either the continuous or intermittent reading modes, designed to monitor trends or measure human forehead surface temperatures, or both. When examined by test methods recommended herein, each thermometer shall comply with thermal profile, temperature range, tolerance, sequencing, operating and storage environment, and labeling requirements.
SCOPE
1.1 This specification covers direct-reading liquid crystal forehead thermometers designed to monitor trends or measure human forehead surface temperatures, or both.
1.2 Thermometers covered by this specification are generally available in continuous or intermittent reading modes. Thermometers meeting the requirements specified herein shall be considered as complying with this specification.
1.3 The following precautionary caveat pertains only to the test method portion, Section 5, of this specification. 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
Relations
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: E1061 −01 (Reapproved 2022)
Standard Specification for
Direct-Reading Liquid Crystal Forehead Thermometers
This standard is issued under the fixed designation E1061; 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 SG1SB
CG 5 MG 5 5 T°520
1.1 This specification covers direct-reading liquid crystal
forehead thermometers designed to monitor trends or measure
See 3.2.5.2 for description of T°520.
human forehead surface temperatures, or both.
3.2.2 color play, n—the predictable sequence of colors
1.2 Thermometers covered by this specification are gener-
exhibitedbyaliquidcrystalformulationasitpassesthroughits
ally available in continuous or intermittent reading modes.
active temperature range. For example, as temperature
Thermometers meeting the requirements specified herein shall
increases,aformulationexhibitssuccessivetan,red,green,and
be considered as complying with this specification.
blue colors.
1.3 The following precautionary caveat pertains only to the
3.2.3 manufacturing lot, n—(1) in the case of continuous
test method portion, Section 5, of this specification. This
manufacturing processes, a lot is a specifically identified
standard does not purport to address all of the safety concerns,
amount produced in a unit of time or quantity in a manner that
if any, associated with its use. It is the responsibility of the user
assumes its having uniform characteristics and quality within
of this standard to establish appropriate safety, health, and
specified limits. (2) In the case of batch processes, a lot means
environmental practices and determine the applicability of
a batch or specifically identified portion of a batch assumed to
regulatory limitations prior to use.
have uniform characteristics and quality within specified lim-
1.4 This international standard was developed in accor-
its.
dance with internationally recognized principles on standard-
3.2.4 sequencing, n—a characteristic whereby the thermal
ization established in the Decision on Principles for the
profiles of the liquid crystal formulations of a given thermom-
Development of International Standards, Guides and Recom-
eter follow each other in an orderly predetermined manner.
mendations issued by the World Trade Organization Technical
3.2.5 specific color phenomena, n (using instrumental meth-
Barriers to Trade (TBT) Committee.
ods of evaluation):
2. Referenced Documents
3.2.5.1 blue—that temperature at which the intensity of 470
2.1 ASTM Standards:
nm light reflected by the liquid crystal is maximum, symbol-
E344 Terminology Relating to Thermometry and Hydrom-
ized as T°470.
etry
3.2.5.2 green—that temperature at which the intensity of
520 nm light reflected by the liquid crystal is maximum,
3. Terminology
symbolized as T°520.
3.1 Definitions—For definitions of terms used in this
3.2.5.3 red—that temperature at which the intensity of 650
specification, refer to Terminology E344.
nm light reflected by the liquid crystal is maximum, symbol-
3.2 Definitions of Terms Specific to This Standard: ized as T°650.
3.2.1 center green (CG) or mid green (MG), n—that tem-
3.2.6 start of blue (SB), n—that temperature at which the
perature which unifies the visual and instrumental evaluation
liquid crystal first begins to reflect blue light, which is defined
methods and is defined by the equation:
as light having a wavelength of 491 nm.
3.2.7 start of green (SG), n—that temperature at which the
This specification is under the jurisdiction of ASTM Committee F04 on
liquid crystal first begins to reflect green light, which is defined
Medical and Surgical Materials and Devices and is the direct responsibility of
as light having a wavelength of 575 nm.
Subcommittee F04.33 on Medical/Surgical Instruments.
Current edition approved Feb. 1, 2022. Published February 2022. Originally
3.2.8 start of red (SR), n—that temperature at which the
approved in 1985. Last previous edition approved in 2014 as E1061 – 01 (2014).
liquidcrystalfirstbeginstoreflectredlight,whichisdefinedas
DOI: 10.1520/E1061-01R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or light having a wavelength of 675 nm.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3.2.9 thermal profile, n—temperatures at which specific
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. color phenomena occur in a liquid crystal thermometer.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E1061 − 01 (2022)
3.2.10 visible start (VS), n—that temperature at which the labels, invoices, sales literature, and the like. The following
liquid crystal first begins to reflect visible light. statement is suggested when sufficient space is available: “This
thermometer conforms to all of the requirements established in
4. Requirements
this specification. Full responsibility for the conformance of
this product to the specification is assumed by (name and
4.1 General—Thermometers represented as complying with
address of producer or distributor).”The following abbreviated
this specification shall meet all of the requirements specified
statement is suggested when available space is insufficient for
herein.
the full statement: “Conforms to ASTM E1061 (name and
4.2 Temperature Range—The liquid crystal forehead ther-
address of producer or distributor).”
mometer shall, as a minimum, meet all requirements of this
specification over the temperat
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