ASTM E644-98

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 644 – 98
Standard Test Methods for
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Testing Industrial Resistance Thermometers
This standard is issued under the fixed designation E 644; 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.
1. Scope E 563 Practice for Preparation and Use of Freezing Point
3
Reference Baths
1.1 These test methods describe the principles, apparatus,
E 1137 Specification Industrial Platinum Resistance Ther-
and procedures for calibration and testing of industrial resis-
2
mometers
tance thermometers.
E 1502 Guide for Use of Freezing–Point Cells for Refer-
1.2 These test methods cover the tests for insulation resis-
2
ence Temperatures
tance, calibration, immersion error, pressure effects, thermal
2
E 1750 Guide for Use of Water Triple Point Cells
response time, vibration effect, mechanical shock, self-heating
E 1751 Guide to Temperature Electromotive Force (EMF)
effect, stability, thermoelectric effect, humidity, and thermal
Tables for Non-Letter Designated Thermocouple Combi-
hysteresis.
2
nations
1.3 These test methods are not necessarily intended for,
2.2 Military Standard:
recommended to be performed on, or appropriate for every
MIL-STD-202 Test Methods for Electronic and Electrical
type of thermometer. The expected repeatability and reproduc-
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Component Parts
ibility of the results are tabulated in Appendix X4.
1.4 These test methods, when specified in a procurement
3. Terminology
document, shall govern the method of testing the resistance
3.1 Definitions:
thermometer.
3.1.1 The definitions given in Terminology E 344 shall
1.5 Thermometer performance specifications, acceptance
apply to these test methods.
limits, and sampling methods are not covered in these test
methods; they should be specified separately in the procure-
4. Significance and Use
ment document.
4.1 These test methods provide uniform methods for testing
1.6 This standard does not purport to address all of the
industrial resistance thermometers so that a given tester may
safety concerns, if any, associated with its use. It is the
expect to obtain the same value of a test result from making
responsibility of the user of this standard to establish appro-
successive measurements on the same test article within the
priate safety and health practices and determine the applica-
limits of repeatability given in Appendix X4. Independent
bility of regulatory limitations prior to use. Specific precau-
testers may also expect to obtain the same result from the
tionary statements are given in 6.3.2, 6.3.5, and 8.1.
testing of the same article within the limits of reproducibility
given in Appendix X4.
2. Referenced Documents
4.2 These tests may be used to qualify platinum resistance
2.1 ASTM Standards:
thermometers for use in specific applications to meet a particu-
E 77 Test Method for the Inspection and Verification of
2 lar specification such as Specification E 1137, or to evaluate
Thermometers
relative merits of equivalent test articles supplied by one or
E 230 Temperature-Electromotive Force (EMF) Tables for
2 more manufacturers, or to determine the limits of the applica-
Standardized Thermocouples
tion of a particular design of thermometer.
E 344 Terminology Relating to Thermometry and Hydrom-
2 4.3 The expected repeatability and reproducibility of se-
etry
lected test methods are included in Appendix X4.
4.4 Some non-destructive tests described in these test meth-
ods may be applied to thermometers that can be subsequently
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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.
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Current edition approved June 10, 1998. Published February 1999. Originally Discontinued; see 1996 Annual Book of ASTM Standards, Vol 14.03.
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published as E 644-78. Last previous edition E 644-91. Available from Superintendent of Documents, U.S. Government Printing
2
Annual Book of ASTM Standards, Vol 14.03. Office, Washington, DC 20234.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 644
sold or used; other destructive tests may preclude the sale or mometer is subjected to the conditions of any concurrent test
use of the test article because of damage that the test may (calibration, pressure, vibration), (2) during the test, and (3)
produce. immediately after the thermometer has
...