ASTM E644-11
(Test Method)Standard Test Methods for Testing Industrial Resistance Thermometers
Standard Test Methods for Testing Industrial Resistance Thermometers
SIGNIFICANCE AND USE
These test methods provide uniform methods for testing industrial resistance thermometers so that a given tester may expect to obtain the same value of a test result from making successive measurements on the same test article within the limits of repeatability given in Appendix X4. Independent testers may also expect to obtain the same result from the testing of the same article within the limits of reproducibility given in Appendix X4.
These tests may be used to qualify platinum resistance thermometers for use in specific applications to meet a particular specification such as Specification E1137/E1137M, or to evaluate relative merits of equivalent test articles supplied by one or more manufacturers, or to determine the limits of the application of a particular design of thermometer.
The expected repeatability and reproducibility of selected test methods are included in Appendix X4.
Some non-destructive tests described in these test methods may be applied to thermometers that can be subsequently sold or used; other destructive tests may preclude the sale or use of the test article because of damage that the test may produce.SCOPE
1.1 These test methods cover the principles, apparatus, and procedures for calibration and testing of industrial resistance thermometers.
1.2 These test methods cover the tests for insulation resistance, calibration, immersion error, pressure effects, thermal response time, vibration effect, mechanical shock, self-heating effect, stability, thermoelectric effect, humidity, thermal hysteresis, thermal shock, and end seal integrity.
1.3 These test methods are not necessarily intended for, recommended to be performed on, or appropriate for every type of thermometer. The expected repeatability and reproducibility of the results are tabulated in Appendix X4.
1.4 These test methods, when specified in a procurement document, shall govern the method of testing the resistance thermometer.
1.5 Thermometer performance specifications, acceptance limits, and sampling methods are not covered in these test methods; they should be specified separately in the procurement document.
1.6 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. Specific precautionary statements are given in 5, 6, 8, 16, and 17.
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Designation: E644 − 11
Standard Test Methods for
1
Testing Industrial Resistance Thermometers
This standard is issued under the fixed designation E644; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E230Specification and Temperature-Electromotive Force
(EMF) Tables for Standardized Thermocouples
1.1 These test methods cover the principles, apparatus, and
E344Terminology Relating to Thermometry and Hydrom-
procedures for calibration and testing of industrial resistance
etry
thermometers.
E563Practice for Preparation and Use of an Ice-Point Bath
1.2 These test methods cover the tests for insulation
as a Reference Temperature
resistance, calibration, immersion error, pressure effects, ther-
E1137/E1137MSpecification for Industrial Platinum Resis-
mal response time, vibration effect, mechanical shock, self-
tance Thermometers
heating effect, stability, thermoelectric effect, humidity, ther-
E1502Guide for Use of Fixed-Point Cells for Reference
mal hysteresis, thermal shock, and end seal integrity.
Temperatures
1.3 These test methods are not necessarily intended for, E1750Guide for Use of Water Triple Point Cells
E1751Guide for Temperature Electromotive Force (EMF)
recommended to be performed on, or appropriate for every
type of thermometer.The expected repeatability and reproduc- Tables for Non-Letter Designated Thermocouple Combi-
3
nations (Withdrawn 2009)
ibility of the results are tabulated in Appendix X4.
E2251Specification for Liquid-in-Glass ASTM Thermom-
1.4 These test methods, when specified in a procurement
eters with Low-Hazard Precision Liquids
document, shall govern the method of testing the resistance
4
2.2 Military Standard:
thermometer.
MIL-STD-202Test Methods for Electronic and Electrical
1.5 Thermometer performance specifications, acceptance
Component Parts
limits, and sampling methods are not covered in these test
methods; they should be specified separately in the procure-
3. Terminology
ment document.
3.1 Definitions of Terms Specific to This Standard:
1.6 This standard does not purport to address all of the
3.1.1 ThedefinitionsgiveninTerminologyE344shallapply
safety concerns, if any, associated with its use. It is the
to these test methods.
responsibility of the user of this standard to establish appro-
3.1.2 bath gradient error, n—the error caused by tempera-
priate safety and health practices and determine the applica-
ture differences in the working space of the bath. (The bath or
bility of regulatory limitations prior to use. Specific precau-
temperatureequalizingblocksshouldbeexploredtodetermine
tionary statements are given in 5, 6, 8, 16, and 17.
the work areas in which the temperature gradients are insig-
nificant.)
2. Referenced Documents
3.1.3 connecting wire error, n—the error caused by uncom-
2
2.1 ASTM Standards:
pensated connecting wire resistance. (Although the connecting
E1Specification for ASTM Liquid-in-Glass Thermometers
wire is part of the measurement circuit, most of it is not at the
E77Test Method for Inspection and Verification of Ther-
temperature that is being determined. Thermometers are avail-
mometers
able in two-, three-, and four-wire configurations. There is no
satisfactory way to compensate for the wire resistance in the
measurement with a two-wire thermometer although the wire
1
These test methods are under the jurisdiction of ASTM Committee E20 on
resistance can be compensated for in three and four-wire
TemperatureMeasurementandarethedirectresponsibilityofSubcommitteeE20.03
on Resistance Thermometers. thermometers.)
Current edition approved May 1, 2011. Published June 2011. Originally
approved in 1978. Last previous edition approved in 2008 as E644–09. DOI:
10.1520/E0644-11.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The last approved version of this historical standard is referenced on
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.astm.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from Superintendent of Documents, U.S. Government Printing
the ASTM website. Office, Washington, DC 20234.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
E644 − 11
3.1.4 immersion error, n—an error caused by the heat sourceisgrounded.Thistestassumesthatthethermometerhas
conduction or radiation, or both, between the resistance ther- a metallic or other electrically conductive sheath or housing.
mometerelementandtheenvironmentexternaltothe
...
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.
Designation:E644–09 Designation: E644 – 11
Standard Test Methods for
1
Testing Industrial Resistance Thermometers
This standard is issued under the fixed designation E644; 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
1.1 These test methods cover the principles, apparatus, and procedures for calibration and testing of industrial resistance
thermometers.
1.2 These test methods cover the tests for insulation resistance, calibration, immersion error, pressure effects, thermal response
time, vibration effect, mechanical shock, self-heating effect, stability, thermoelectric effect, humidity, thermal hysteresis, thermal
shock, and end seal integrity.
1.3 These test methods are not necessarily intended for, recommended to be performed on, or appropriate for every type of
thermometer. The expected repeatability and reproducibility of the results are tabulated in Appendix X4.
1.4 These test methods, when specified in a procurement document, shall govern the method of testing the resistance
thermometer.
1.5 Thermometer performance specifications, acceptance limits, and sampling methods are not covered in these test methods;
they should be specified separately in the procurement document.
1.6 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. Specific precautionary statements are given in 5, 6, 8, 16, and 17.
2. Referenced Documents
2
2.1 ASTM Standards:
E1 Specification for ASTM Liquid-in-Glass Thermometers
E77 Test Method for Inspection and Verification of Thermometers
E230 Specification and Temperature-Electromotive Force (EMF) Tables for Standardized Thermocouples
E344 Terminology Relating to Thermometry and Hydrometry
E563 Practice for Preparation and Use of an Ice-Point Bath as a Reference Temperature
E1137/E1137M Specification for Industrial Platinum Resistance Thermometers
E1502 Guide for Use of Fixed-Point Cells for Reference Temperatures
E1750 Guide for Use of Water Triple Point Cells
E1751 Guide for Temperature Electromotive Force (EMF) Tables for Non-Letter Designated Thermocouple Combinations
E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
3
2.2 Military Standard:
MIL-STD-202 Test Methods for Electronic and Electrical Component Parts
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 The definitions given in Terminology E344 shall apply to these test methods.
3.1.2 bath gradient error, n—the error caused by temperature differences in the working space of the bath. (The bath or
temperatureequalizingblocksshouldbeexploredtodeterminetheworkareasinwhichthetemperaturegradientsareinsignificant.)
3.1.3 calibration, n—the determination of the indications of a thermometer with respect to temperatures established by a
standard resulting in scale corrections to be applied when maximum accuracy is required.
3.1.4connecting wire error, n—the error caused by uncompensated connecting wire resistance. (Although the connecting wire
1
These test methods are under the jurisdiction of ASTM Committee E20 on Temperature Measurement and are the direct responsibility of Subcommittee E20.03 on
Resistance Thermometers.
Current edition approved Nov.May 1, 2009.2011. Published January 2010.June 2011. Originally approved in 1978. Last previous edition approved in 2008 as E644 – 089.
DOI: 10.1520/E0644-09.10.1520/E0644-11.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM 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.
3
Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20234.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
E644 – 11
ispartofthemeasurementcircuit,mostofitisnotatthetemperaturethatisbeingdetermined.Thermometersareavailableintwo-,
three-, and four-wire configurations. There is no satisfactory way to compensate for the wire resistance in the m
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