ASTM E2623-08e1

Standard Practice for Reporting Thermometer Calibrations

SIGNIFICANCE AND USE
This practice is adequate for use with all ASTM Test Methods which require the reporting of temperature measurements.
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 to the benefit of all concerned.
This practice is not meant to supersede requirements of other standards practice such as ISO/IEC 17025 or ANSI/NCSL Z540-1.
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, 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: 31-Oct-2008
• ICS: 17.200.20 - Temperature-measuring instruments
• Technical Committee: E20 - Temperature Measurement
• Drafting Committee: E20.07 - Fundamentals in Thermometry

Relations

• Replaces: ASTM E2623-08 - Standard Practice for Reporting Temperature Calibrations
• Effective Date: 01-Nov-2008
• Referred By: ASTM E2593-17(2023) - Standard Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers
• Effective Date: 01-Nov-2008
• Referred By: ASTM E2730-22 - Standard Guide for Calibration and Use of Thermocouple Reference Junction Probes in Evaluation of Electronic Reference Junction Compensation Circuits
• Effective Date: 01-Nov-2008

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: E2623 − 08
StandardPractice 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
´ NOTE—The title was corrected editorially in May 2009.
1. Scope 3.2 Definitions of Terms Specific to This Standard:
3.2.1 correction, n—numerical value added to the uncor-
1.1 This practice contains reporting requirements for ther-
rected result of a measurement to compensate for errors.
mometer calibrations included in ASTM Committee E20 Test
Methods. 3.2.1.1 Discussion—The correction is equal to the negative
of the estimated errors. Since the systematic error cannot be
1.2 This practice covers reports of calibration for radiation
known perfectly, the compensation cannot be complete.
thermometers, liquid-in-glass thermometers, resistance
thermometers, and new thermocouples. 3.2.2 error, n—the indication of a thermometer or tempera-
NOTE 1—This practice does not apply to used thermocouples.
ture measuring device minus a true value of the corresponding
input quantity.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3.2.2.1 Discussion—Since the true value cannot be
responsibility of the user of this standard to establish appro-
determined, in practice a conventional true value is used. This
priate safety and health practices and determine the applica-
concept applies mainly where the instrument is compared to a
bility of regulatory limitations prior to use.
reference standard.
3.2.3 gradient zone, n—the section of a thermocouple that is
2. Referenced Documents
exposed during a measurement to temperatures in the range
2
2.1 ASTM Standards:
from t + 0.1(t – t )to t + 0.9(t – t ), where t is
amb m amb amb m amb amb
E77 Test Method for Inspection and Verification of Ther-
ambienttemperatureand t isthetemperatureofthemeasuring
m
mometers
junction.
E344 Terminology Relating to Thermometry and Hydrom-
3.2.3.1 Discussion—This term is used in thermocouple cali-
etry
bration reports as part of the description of the thermal profile
2.2 Other Standards:
alongthelengthofthethermocouple.Althoughathermocouple
ANSI/NCSL Z540-1-1994 American National Standard for
emf is a function of the measuring and reference junction
Calibration—Calibration Laboratories and Measuring and
temperatures, the emf is actually generated along the length of
3
Test Equipment—General Requirements
thethermocouple,whereverthethermoelementspassthrougha
ISO/IEC 17025:2005 General Requirements for the Compe-
temperature gradient. The gradient zone definition is intended
3
tence of Testing and Calibration Laboratories
to describe, in an approximate way, the section of thermo-
couple that created most of the emf during the calibration.
3. Terminology
3.2.4 half-maximum heated length, n—the distance between
3.1 Definitions—Definitions given in Terminology E344,
the tip of the temperature sensor and the position along the
unless otherwise defined herein, apply to terms as used in this
length of the sensor leads or sheath where the temperature
practice.
equals the average of the calibration-point and ambient tem-
peratures.
1
ThispracticeisunderthejurisdictionofASTMCommitteeE20onTemperature
3.2.4.1 Discussion—This term is used in thermocouple cali-
Measurement and is the direct responsibility of Subcommittee E20.07 on Funda-
bration reports as part of the description of the thermal profile
mentals in Thermometry.
along the length of the thermocouple.
Current edition approved Nov. 1, 2008. Published January 2009. DOI: 10.1520/
E2623-08E01.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4. Summary of Practice
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4.1 This practice describes the required information neces-
the ASTM website.
3
sary for reporting results of temperature calibrations included
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. in ASTM Test Methods.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E2623 − 08
5. Significance and Use 6.1.9 Conditions (for example, environmental conditions)
under which the calibrations were made that have an influence
5.1 This practice is adequate for use with all ASTM Test
on the measurement results.
Methods which re
...

This document is not anASTM standard and is intended only to provide the user of anASTM 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 Designation:E2623–08
Standard Practice for
1
Reporting Thermometer Calibrations
This standard is issued under the fixed designation E 2623; 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
´ 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 E20 Test
Methods.
1.2 This practice covers reports of calibration for radiation thermometers, liquid-in-glass thermometers, resistance thermom-
eters, 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
E 344 Terminology Relating to Thermometry and Hydrometry
2.2 Other Standards:
ANSI/NCSL Z540-1-1994 American National Standard for Calibration—Calibration Laboratories and Measuring and Test
3
Equipment—General Requirements
3
ISO/IEC 17025:2005 General Requirements for the Competence of Testing and Calibration Laboratories
3. Terminology
3.1 Definitions—Definitions given in Terminology E 344, 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.
3.2.1.1 Discussion—The correction is equal to the negative of the estimated systematic error.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 a 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 where 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 junction.
amb m amb amb m amb amb m
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 generated along the length of the thermocouple, wherever the thermoelements pass through a temperature
gradient.Thegradientzonedefinitionisintendedtodescribe,inanapproximateway,thesectionofthermocouplethatcreatedmost
of the emf during the calibration.
1
This practice is under the jurisdiction ofASTM Committee E20 on Temperature Measurement and is the direct responsibility of Subcommittee E20.07 on Fundamentals
in Thermometry.
Current edition approved Nov. 1, 2008. Published January 2009.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
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E2623–08
3.2.4 half-maximum heated length, n—the distance between the tip of the temperature sensor and the position along the length
of the sensor leads or sheath where the temperature equals the average of the calibration-point and ambient temperatures.
3.2.4.1 Discussion—This term is used in thermocouple calibration reports as part of the description of the thermal profile along
the length of the thermocouple.
4. Summary of Practice
4.1 This practice describes the required information necessary for reporting results of temperature calibrations in
...