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ASTM E2593-17(2023)

(Guide)

Standard Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers

Standard Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers

SIGNIFICANCE AND USE
5.1 This guide is intended to be used for verifying the resistance-temperature relationship of industrial platinum resistance thermometers that are intended to satisfy the requirements of Specification E1137/E1137M. It is intended to provide a consistent method for calibration and uncertainty evaluation while still allowing the user some flexibility in the choice of apparatus and instrumentation. It is understood that the limits of uncertainty obtained depend in large part upon the apparatus and instrumentation used. Therefore, since this guide is not prescriptive in approach, it provides detailed instruction in uncertainty evaluation to accommodate the variety of apparatus and instrumentation that may be employed.  
5.2 This guide is intended primarily to satisfy applications requiring compliance to Specification E1137/E1137M. However, the techniques described may be appropriate for applications where more accurate calibrations are needed.  
5.3 Many applications require tolerances to be verified using a minimum test uncertainty ratio (TUR). This standard provides guidelines for evaluating uncertainties used to support TUR calculations.
SCOPE
1.1 This guide describes the techniques and apparatus required for the accuracy verification of industrial platinum resistance thermometers constructed in accordance with Specification E1137/E1137M and the evaluation of calibration uncertainties. The procedures described apply over the range of -200 °C to 650 °C.  
1.2 This guide does not intend to describe procedures necessary for the calibration of platinum resistance thermometers used as calibration standards or Standard Platinum Resistance Thermometers. Consequently, calibration of these types of instruments is outside the scope of this guide.  
1.3 Industrial platinum resistance thermometers are available in many styles and configurations. This guide does not purport to determine the suitability of any particular design, style, or configuration for calibration over a desired temperature range.  
1.4 The evaluation of uncertainties is based upon current international practices as described in JCGM 100:2008 “Evaluation of measurement data—Guide to the expression of uncertainty in measurement” and ANSI/NCSL Z540.2-1997 “U.S. Guide to the Expression of Uncertainty in Measurement.”  
1.5 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.  
1.6 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

Status
Published
Publication Date
30-Jun-2023
ICS
17.200.20 - Temperature-measuring instruments
Technical Committee
E20 - Temperature Measurement
Drafting Committee
E20.03 - Resistance Thermometers
Current Stage
Ref Project

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ASTM E2593-17(2023) - Standard Guide for Accuracy Verification of Industrial Platinum Resistance ThermometersASTM E2593-17(2023) - Standard Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers
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ASTM E2593-17(2023) - Standard Guide for Accuracy Verification of Industrial Platinum Resistance Thermometers
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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: E2593 − 17 (Reapproved 2023)
Standard Guide for
Accuracy Verification of Industrial Platinum Resistance
1
Thermometers
This standard is issued under the fixed designation E2593; 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 2. Referenced Documents
2
1.1 This guide describes the techniques and apparatus re- 2.1 ASTM Standards:
quired for the accuracy verification of industrial platinum E344 Terminology Relating to Thermometry and Hydrom-
resistance thermometers constructed in accordance with Speci- etry
fication E1137/E1137M and the evaluation of calibration E563 Practice for Preparation and Use of an Ice-Point Bath
uncertainties. The procedures described apply over the range of as a Reference Temperature
-200 °C to 650 °C. E644 Test Methods for Testing Industrial Resistance Ther-
mometers
1.2 This guide does not intend to describe procedures
E1137/E1137M Specification for Industrial Platinum Resis-
necessary for the calibration of platinum resistance thermom-
tance Thermometers
eters used as calibration standards or Standard Platinum
E1502 Guide for Use of Fixed-Point Cells for Reference
Resistance Thermometers. Consequently, calibration of these
Temperatures
types of instruments is outside the scope of this guide.
E1750 Guide for Use of Water Triple Point Cells
1.3 Industrial platinum resistance thermometers are avail- E2623 Practice for Reporting Thermometer Calibrations
able in many styles and configurations. This guide does not E2488 Guide for the Preparation and Evaluation of Liquid
purport to determine the suitability of any particular design, Baths Used for Temperature Calibration by Comparison
3
style, or configuration for calibration over a desired tempera-
2.2 ANSI Publications:
ture range.
ANSI/NCSL Z540.2-1997 U.S. Guide to the Expression of
Uncertainty in Measurement
1.4 The evaluation of uncertainties is based upon current
ANSI/NCSL Z540.3-2006 Requirements for the Calibra-
international practices as described in JCGM 100:2008 “Evalu-
tions of Measuring and Test Equipment
ation of measurement data—Guide to the expression of uncer-
4
tainty in measurement” and ANSI/NCSL Z540.2-1997 “U.S.
2.3 Other Publication:
Guide to the Expression of Uncertainty in Measurement.”
JCGM 100:2008 Evaluation of measurement data—Guide to
the expression of uncertainty in measurement
1.5 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-
priate safety, health, and environmental practices and deter-
3.1 Definitions—The definitions given in Terminology E344
mine the applicability of regulatory limitations prior to use.
shall be considered as applying to the terms used in this guide.
1.6 This international standard was developed in accor-
3.2 Definitions of Terms Specific to This Standard:
dance with internationally recognized principles on standard-
3.2.1 annealing, v—a heat treating process intended to
ization established in the Decision on Principles for the
stabilize resistance thermometers prior to calibration and use.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
1
This guide is under the jurisdiction of ASTM Committee E20 on Temperature the ASTM website.
3
Measurement and is the direct responsibility of Subcommittee E20.03 on Resistance Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
Thermometers. 4th Floor, New York, NY 10036, http://www.ansi.org.
4
Current edition approved July 1, 2023. Published July 2023. Originally approved JCGM 100:2008, Evaluation of measurement data—Guide to the expression of
in 2007. Last previous edition approved in 2017 as E2593 – 17. DOI: 10.1520/ uncertainty in measurement. Available from the BIPM, Sevres, France, http://
E2593-17R23. www.bipm.org/en/publications/guides/gum.html.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2593 − 17 (2023)
3.2.2 check standard, n—a thermometer sim
...

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SIGNIFICANCE AND USE
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1.2 The calibration method is applicable to the following thermocouple assemblies:  
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1.2.2 Type 2—Assemblies in which loose fitting ceramic insulating pieces, such as single-bore or double-bore tubes, are placed over the thermoelements.  
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This specification covers the requirements for bare solid conductors made of tungsten and rhenium alloy thermoelements supplied in matched pairs. These thermoelements shall be suitable for use in either bead-insulated, bare-wire thermocouples, or in compacted metal-sheathed, ceramic insulated thermocouple material or assemblies. Unless otherwise noted, all information in this specification applies to both thermocouple combinations of tungsten-3 % rhenium versus tungsten-25 % rhenium (W3Re/W25Re) and tungsten-5 % rhenium versus tungsten-26 % rhenium (W5Re/W26Re; Type C). Thermoelements should meet specified physical, mechanical, thermoelectric, and compositional requirements.
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ASTM E585/E585M-23(Specification)
Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed, Base Metal Thermocouple Cable

ABSTRACT
This specification establishes the required material, processing and testing requirements, and also the optional supplementary testing and quality assurance and verification choices for compacted, mineral-insulated, metal-sheathed, base metal thermocouple cables with at least two thermoelements. The material of construction includes standard base metal thermoelements, austenitic stainless steel or other corrosion resistant sheath material, and either magnesia (MgO) or alumina (Al2O3) insulation. The required tests to which the thermocouple cables shall undergo for quality verification are dimensions, insulation resistance at room temperature, calibration, electrical continuity, insulation density, sheath integrity, and EMF versus temperature values.
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ABSTRACT
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FIG. 1 Grounded Measuring Junction, Style G  
FIG. 2 Ungrounded Measuring Junction, Style U  
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1.3.2 Style U2 (ungrounded)—The measuring junction is electrically isolated from its conductive sheath and from reference ground.  
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ASTM E1350-18(2023)(Guide)
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SIGNIFICANCE AND USE
5.1 These test procedures confirm and document that the thermocouple assembly was not damaged prior to or during the installation process and that the extension wires are properly connected.  
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SCOPE
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1.3.1.1 Thermoelements,
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1.3.2 Insulation Resistance:  
1.3.2.1 Insulation, thermocouple assembly,
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1.3.3 Seebeck Voltage:  
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Standard Specification for Duplex, Base Metal Thermocouple Wire With Glass Fiber or Silica Fiber Insulation

ABSTRACT
This specification sets forth the requirements for duplex, types E, J, K, N and T thermocouple wire, insulated with E-glass, S-glass, amorphous silica fiber or polycrystalline fiber. This specification presents the requirements for impregnated and non-impregnated fiber insulated thermocouple wire for normally accepted industrial use. The material shall be classified as follows: Class A-Duplex; Class B-Duplex; Class C-Duplex; Class D-Duplex; Class E-Duplex; and Class F-Duplex. Thermoelements shall be solid thermocouple grade materials with a smooth, bright finish and shall be fully annealed prior to insulating. Individual thermoelements shall be covered with a braid, or double wrap (one wrap in each direction) of glass fibers, a braid of glass fibers, or braid of fibers.
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Standard Guide for the Preparation and Evaluation of Liquid Baths Used for Temperature Calibration by Comparison

SIGNIFICANCE AND USE
5.1 The design of a controlled temperature bath will determine what thermometers can be calibrated and to what extent an isothermal condition is achieved. The lack of thermal stability and uniformity of the bath are sources of error that contribute to the overall calibration uncertainty.  
5.2 This guide describes a procedure for determining the effective working space for a controlled temperature fluid bath.  
5.3 This guide describes a procedure for determining the thermal stability within a controlled temperature fluid bath. Overall thermal stability is composed of the bath performance as specified by the manufacturer of the bath equipment and as a component of calibration uncertainty.  
5.4 This guide describes a procedure for determining the temperature uniformity of the working space of the controlled temperature fluid bath.
SCOPE
1.1 This guide is intended for use with controlled temperature comparison baths that contain test fluids and operate within the temperature range of –100 °C to 550 °C.  
1.2 This guide describes the essential features of controlled temperature fluid baths used for the purpose of thermometer calibration by the comparison method.  
1.3 This guide does not address the details on the design and construction of controlled-temperature fluid baths.  
1.4 This guide describes a method to define the working space of a bath and evaluate the temperature variations within this space. Ideally, the working space will be as close as possible to isothermal.  
1.5 This guide does not address fixed point baths, ice point baths, or vapor baths.  
1.6 This guide does not address fluidized powder baths.  
1.7 This guide does not address baths that are programmed to change temperature.  
1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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Standard Guide for Selection and Use of Infrared Thermometers

SIGNIFICANCE AND USE
4.1 This guide provides guidelines and basic test methods for the use of infrared thermometers. The purpose of this guide is to provide a basis for users of IR thermometers to make more accurate measurements, to understand the error in measurements, and reduce the error in measurements.
SCOPE
1.1 This guide covers electronic instruments intended for measurement of temperature by detecting intensity of thermal radiation exchanged between the subject of measurement and the sensor.  
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1.8 The values of quantities stated in SI units are to be regarded as the standard. The values of quantities in parentheses are not in SI and are optional.  
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Standard Guide for Use of Fixed-Point Cells for Reference Temperatures

SIGNIFICANCE AND USE
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SCOPE
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FIG. 1 Examples of Fixed-Point Cells  
FIG. 2 Example of Fixed-Point Furnace  
Note 1: This example shows an insulated furnace body and two alternative types of furnace cores. The core on the left is a three-zone shielded type. The core on the right employs a heat pipe to reduce temperature gradients.  
1.3 This guide is intended to describe good practice and establish uniform procedures for the realization of fixed points.  
1.4 This guide emphasizes principles. The emphasis on principles is intended to aid the user in evaluating cells, in improving technique for using cells, and in establishing procedures for specific applications.  
1.5 For the purposes of this guide, the use of fixed-point cells for the accurate calibration of thermometers is restricted to immersion-type thermometers that, when inserted into the reentrant well of the cell, (1) indicate the temperature only of the isothermal region of the well, and (2) do not significantly alter the temperature of the isothermal region of the well by heat transfer.  
1.6 This guide does not address all of the details of thermometer calibration.  
1.7 This guide is intended to complement special operating instructions supplied by manufacturers of fixed-point apparatus.  
1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.9 The following hazard caveat pertains only to the test method portion, Section 7, of this guide. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of th...

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ASTM
ASTM E1594-22(Guide)
Standard Guide for Expression of Temperature

ABSTRACT
This guide presents the uniform methods for expressing temperature, temperature values, and temperature differences. Also covered here are the practical scales, numerical formats, and unit symbol formats used in representing temperature.
SCOPE
1.1 This guide covers uniform methods for expressing temperature, temperature values, and temperature differences.  
1.2 This guide is intended as a supplement to IEEE/ASTM SI-10.  
1.3 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.

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