ASTM E2623-14

Standard Practice for Reporting Thermometer Calibrations

SIGNIFICANCE AND USE
5.1 This practice is adequate for use with all ASTM Test Methods which require the reporting of temperature measurements.  
5.2 The Report of Calibration, however named, is the physical output of the calibration laboratory. It shall be prepared so that both the results of the measurement(s) and the non-technical information necessary to support those results are conveyed in a manner that ensures accurate communication and justification of the results.  
5.3 This practice is not meant to supersede requirements of other standards practice such as ISO/IEC 17025 or ANSI/NCSL Z540.3.
SCOPE
1.1 This practice contains reporting requirements for thermometer calibrations included in ASTM Committee E20 Test Methods.  
1.2 This practice covers reports of calibration for radiation thermometers, liquid-in-glass thermometers, resistance thermometers, digital thermometers, and new thermocouples.
Note 1: This practice does not apply to used thermocouples.  
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 14-Dec-2014
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: E20 - Temperature Measurement
• Drafting Committee: E20.07 - Fundamentals in Thermometry

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: E2623 − 14
Standard Practice for
1
Reporting Thermometer Calibrations
This standard is issued under the fixed designation E2623; 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 Guide to the Expression of Uncertainty in Measurement
(GUM:1995)
1.1 This practice contains reporting requirements for ther-
NIST Technical Note 1297 Guidelines for Evaluating and
mometer calibrations included in ASTM Committee E20 Test
Expressing the Uncertainty of NIST Measurement
Methods.
Results, 1994 Edition
1.2 This practice covers reports of calibration for radiation
UKAS M3003 The Expression of Uncertainty and Confi-
thermometers, liquid-in-glass thermometers, resistance
dence in Measurement, Edition 2
thermometers, digital thermometers, and new thermocouples.
ANSI/NCSL Z540.2-1997 (R2002) U.S. Guide to the Ex-
NOTE 1—This practice does not apply to used thermocouples.
pression of Uncertainty in Measurement
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions—Definitions given in Terminology E344,
priate safety and health practices and determine the applica-
unless otherwise defined herein, apply to terms as used in this
bility of regulatory limitations prior to use.
practice.
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
3.2.1 correction, n—numerical value added to the uncor-
2
2.1 ASTM Standards:
rected result of a measurement to compensate for errors.
E77 Test Method for Inspection and Verification of Ther-
3.2.1.1 Discussion—The correction is equal to the negative
mometers
of the estimated errors. Since the systematic error cannot be
E344 Terminology Relating to Thermometry and Hydrom-
known perfectly, the compensation cannot be complete.
etry
3.2.2 error, n—the indication of a thermometer or tempera-
E1137 SpecificationforIndustrialPlatinumResistanceTher-
ture measuring device minus the true value of the correspond-
mometers
ing input quantity.
2.2 Other Standards or Guides:
3.2.2.1 Discussion—Since the true value cannot be
ANSI/NCSL Z540.3-2006 American National Standard for
determined, in practice a conventional true value is used. This
Calibration—Calibration Laboratories and Measuring and
concept applies mainly when the instrument is compared to a
3
Test Equipment—General Requirements
reference standard.
ISO/IEC 17025:2005 General Requirements for the Compe-
3 3.2.3 gradient zone, n—thesectionofathermocouplethatis
tence of Testing and Calibration Laboratories
exposed during a measurement to temperatures in the range
JCGM100:2008 Evaluation of Measurement Data—Guide
from t + 0.1(t – t )to t + 0.9(t – t ), where t is
amb m amb amb m amb amb
to the Expression of Uncertainty in Measurement
ambienttemperatureand t isthetemperatureofthemeasuring
m
ISO/IEC Guide 98-3 Uncertainty of Measurement—Part 3:
junction (all in °C).
3.2.3.1 Discussion—This term is used in thermocouple cali-
bration reports as part of the description of the thermal profile
1
ThispracticeisunderthejurisdictionofASTMCommitteeE20onTemperature
along the length of the thermocouple. Although thermocouple
Measurement and is the direct responsibility of Subcommittee E20.07 on Funda-
emf is a function of the measuring and reference junction
mentals in Thermometry.
Current edition approved Dec. 15, 2014. Published January 2015. Originally temperatures, the emf is actually generated along the length of
ε1
approved in 2008. Last previous edition approved in 2008 as E2623 – 08 . DOI:
thethermocouple,whereverthethermoelementspassthrougha
10.1520/E2623-14.
temperature gradient. The gradient zone definition is intended
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
to describe, in an approximate way, the section of thermo-
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
couple that created most of the emf during the calibration.
the ASTM website.
3
3.2.4 half-maximum heated length, n—the distance between
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. the tip of the temperature sensor and the position along the
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2623 − 14
length of the sensor leads or sheath where the temperature
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: E2623 − 08 E2623 − 14
Standard Practice for
1
Reporting Thermometer Calibrations
This standard is issued under the fixed designation E2623; 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
ε NOTE—The title was corrected editorially in May 2009.
1. Scope
1.1 This practice contains reporting requirements for thermometer calibrations included in ASTM Committee E20E20 Test
Methods.
1.2 This practice covers reports of calibration for radiation thermometers, liquid-in-glass thermometers, resistance
thermometers, digital thermometers, and new thermocouples.
NOTE 1—This practice does not apply to used thermocouples.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E77 Test Method for Inspection and Verification of Thermometers
E344 Terminology Relating to Thermometry and Hydrometry
E1137 Specification for Industrial Platinum Resistance Thermometers
2.2 Other Standards:Standards or Guides:
ANSI/NCSL Z540-1-1994Z540.3-2006 American National Standard for Calibration—Calibration Laboratories and Measuring
3
and Test Equipment—General Requirements
3
ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories
JCGM100:2008 Evaluation of Measurement Data—Guide to the Expression of Uncertainty in Measurement
ISO/IEC Guide 98-3 Uncertainty of Measurement—Part 3: Guide to the Expression of Uncertainty in Measurement
(GUM:1995)
NIST Technical Note 1297 Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, 1994
Edition
UKAS M3003 The Expression of Uncertainty and Confidence in Measurement, Edition 2
ANSI/NCSL Z540.2-1997 (R2002) U.S. Guide to the Expression of Uncertainty in Measurement
3. Terminology
3.1 Definitions—Definitions given in Terminology E344, unless otherwise defined herein, apply to terms as used in this practice.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 correction, n—numerical value added to the uncorrected result of a measurement to compensate for errors.
1
This practice is under the jurisdiction of ASTM Committee E20 on Temperature Measurement and is the direct responsibility of Subcommittee E20.07 on Fundamentals
in Thermometry.
Current edition approved Nov. 1, 2008Dec. 15, 2014. Published January 2009January 2015. Originally approved in 2008. Last previous edition approved in 2008 as
ε1
E2623 – 08 . DOI: 10.1520/E2623-08E01.10.1520/E2623-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
3.2.1.1 Discussion—
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2623 − 14
The correction is equal to the negative of the estimated errors. Since the systematic error cannot be known perfectly, the
compensation cannot be complete.
3.2.2 error, n—the indication of a thermometer or temperature measuring device minus athe true value of the corresponding
input quantity.
3.2.2.1 Discussion—
Since the true value cannot be determined, in practice a conventional true value is used. This concept applies mainly wherewhen
the instrument is compared to a reference standard.
3.2.3 gradient zone, n—the section of a thermocouple that is exposed during a measurement to temperatures in the range from
t + 0.1(t – t ) to t + 0.9(t – t ), where t is ambient temperature and t is the temperature of the measuring
amb m amb amb m amb amb m
junction.junction (all in °C).
3.2.3.1 Discussion—
This term is used in thermocouple calibration reports as part of the description of the thermal profile along the length of the
thermocouple. Although a thermocouple emf is a function of the measuring and reference junction temperatures, the emf is actually
...