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ASTM E2821-20

(Specification)

Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers

Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers

ABSTRACT
This specification establishes the requirements for compacted, mineral-insulated, metal-sheathed (MIMS) cables used to manufacture metal-sheathed, industrial resistance thermometers known as Resistance Temperature Detectors (RTDs). It covers the material requirements, significance and use, ordering information and basis for purchase, processing requirements, quality verification and test requirements, certification and reports, packaging, marking, and shipping.
SCOPE
1.1 This specification covers the requirements for compacted, mineral-insulated, metal-sheathed (MIMS) cables used to manufacture metal-sheathed, industrial resistance thermometers referred to in this document as Resistance Temperature Detectors or RTDs.  
1.2 The materials of construction include copper, nickel-clad copper, copper-45 % nickel (constantan), or nickel conductors, an austenitic stainless steel or nickel-chromium alloy sheath, and either magnesia (MgO) or alumina (Al2O3) insulation.  
1.3 The cable diameter is between 0.093 and 0.500 in. (2.33 and 12.70 mm) and contains between two and eight conductors, set in various design configurations and wire spacings.  
1.4 The values of temperature in this specification are based on the International Temperature Scale of 1990 (ITS-90).  
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.7 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-Apr-2020
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 E2821-20 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance ThermometersASTM E2821-20 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers
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REDLINE ASTM E2821-20 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance ThermometersREDLINE ASTM E2821-20 - Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial 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:E2821 −20
Standard Specification for
Compacted Mineral-Insulated, Metal-Sheathed Cable Used
1
in Industrial Resistance Thermometers
This standard is issued under the fixed designation E2821; 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 2. Referenced Documents
1.1 This specification covers the requirements for 2.1 Thelatestissuesofthefollowingdocumentsformapart
compacted, mineral-insulated, metal-sheathed (MIMS) cables
of this specification to the extent specified herein. In the event
used to manufacture metal-sheathed, industrial resistance ther- of a conflict between this specification and other specifications
mometers referred to in this document as Resistance Tempera- referenced herein, this specification shall take precedence.
ture Detectors or RTDs.
2.2 Due to the similarity between Compacted MIMS Ther-
1.2 The materials of construction include copper, nickel- mocouple Cable and Compacted MIMS Cable used in Indus-
clad copper, copper-45 % nickel (constantan), or nickel trial Resistance Thermometers, some Thermocouple ASTM
conductors, an austenitic stainless steel or nickel-chromium
Standards may apply.
alloy sheath, and either magnesia (MgO) or alumina (Al O )
2 3 2
2.3 ASTM Standards:
insulation.
A213/A213MSpecification for Seamless Ferritic and Aus-
1.3 Thecablediameterisbetween0.093and0.500in.(2.33
tenitic Alloy-Steel Boiler, Superheater, and Heat-
and 12.70 mm) and contains between two and eight
Exchanger Tubes
conductors, set in various design configurations and wire A249/A249MSpecification for Welded Austenitic Steel
spacings.
Boiler, Superheater, Heat-Exchanger, and Condenser
Tubes
1.4 Thevaluesoftemperatureinthisspecificationarebased
A632Specification for Seamless and Welded Austenitic
on the International Temperature Scale of 1990 (ITS-90).
Stainless Steel Tubing (Small-Diameter) for General Ser-
1.5 The values stated in inch-pound units are to be regarded
vice
as standard. The values given in parentheses are mathematical E112Test Methods for Determining Average Grain Size
conversions to SI units that are provided for information only E344Terminology Relating to Thermometry and Hydrom-
and are not considered standard.
etry
E780Test Method for Measuring the Insulation Resistance
1.6 This standard does not purport to address all of the
of Mineral-Insulated, Metal-SheathedThermocouples and
safety concerns, if any, associated with its use. It is the
Mineral-Insulated, Metal-Sheathed Cable at Room Tem-
responsibility of the user of this standard to establish appro-
perature
priate safety, health, and environmental practices and deter-
E839 Test Methods for Sheathed Thermocouples and
mine the applicability of regulatory limitations prior to use.
Sheathed Thermocouple Cable
1.7 This international standard was developed in accor-
E1137/E1137MSpecification for Industrial Platinum Resis-
dance with internationally recognized principles on standard-
tance Thermometers
ization established in the Decision on Principles for the
E1652Specification for Magnesium Oxide and Aluminum
Development of International Standards, Guides and Recom-
Oxide Powder and Crushable Insulators Used in the
mendations issued by the World Trade Organization Technical
Manufacture of Base Metal Thermocouples, Metal-
Barriers to Trade (TBT) Committee.
Sheathed Platinum Resistance Thermometers, and Noble
Metal Thermocouples
1
This specification is under the jurisdiction of ASTM Committee E20 on
Temperature Measurement and is the direct responsibility of Subcommittee E20.03
2
on Resistance Thermometers. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2020. Published June 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2013. Last previous edition approved in 2013 as E2821– 13. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E2821-20 the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2821−20
3
2.4 ANSI Standard: 5.1.8 Any deviations from this specification or the refer-
ANSI B46.1Surface Texture, Surface Roughness, Waviness enced documents.
and Lay 5.1.9 The Optional Clearance if applicable (see Fig. 1).
6. General Requirements
3. Terminology
6.1 MIMS RTD Cable—Cable shall be
...

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.
Designation: E2821 − 13 E2821 − 20
Standard Specification for
Compacted Mineral-Insulated, Metal-Sheathed Cable Used
1
in Industrial Resistance Thermometers
This standard is issued under the fixed designation E2821; 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 This specification covers the requirements for compacted, mineral-insulated, metal-sheathed (MIMS) cables used to
manufacture metal-sheathed, industrial resistance thermometers referred to in this document as Resistance Temperature Detectors
or RTDs.
1.2 The materials of construction include copper, nickel-clad copper, copper-45 % nickel (constantan), or nickel conductors, an
austenitic stainless steel or nickel-chromium alloy sheath, and either magnesia (MgO) or alumina (Al O ) insulation.
2 3
1.3 The cable diameter is between 0.093 and 0.500 in. (2.33 and 12.70 mm) and contains between two and eight conductors,
set in various design configurations and wire spacings.
1.4 The values of temperature in this specification are based on the International Temperature Scale of 1990 (ITS-90).
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.7 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.
2. Referenced Documents
2.1 The latest issues of the following documents form a part of this specification to the extent specified herein. In the event of
a conflict between this specification and other specifications referenced herein, this specification shall take precedence.
2.2 Due to the similarity between Compacted MIMS Thermocouple Cable and Compacted MIMS Cable, Cable used in
Industrial Resistance Thermometers, some Thermocouple ASTM Standards may apply.
2
2.3 ASTM Standards:
A213/A213M Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A249/A249M Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A269 Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A632 Specification for Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
B163E112 Specification for Seamless Nickel and Nickel Alloy Condenser and Heat-Exchanger TubesTest Methods for
Determining Average Grain Size
B167 Specification for Nickel-Chromium-Aluminum Alloys (UNS N06699), Nickel-Chromium-Iron Alloys (UNS N06600,
N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS
N06617), Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674), and
B516 Specification for Welded Nickel-Chromium-Aluminum Alloy (UNS N06699) and Nickel-Chromium-Iron Alloy (UNS
1
This specification is under the jurisdiction of ASTM Committee E20 on Temperature Measurement and is the direct responsibility of Subcommittee E20.03 on Resistance
Thermometers.
Current edition approved May 1, 2013May 1, 2020. Published July 2013June 2020. Originally approved in 2013. Last previous edition approved in 2013 as E2821 – 13.
DOI: 10.1520/E2821-1310.1520/E2821-20
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 the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2821 − 20
N06600, UNS N06601, UNS N06603, UNS N06025, UNS N06045, UNS N06690, and UNS N06693) Tubes
E344 Terminology Relating to
...

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Standard Test Method for Calibration of Refractory Metal Thermocouples Using a Radiation Thermometer

SIGNIFICANCE AND USE
5.1 This test method is intended to be used by wire producers and thermocouple manufacturers for certification of refractory metal thermocouples. It is intended to provide a consistent method for calibration of refractory metal thermocouples referenced to a calibrated radiation thermometer. Uncertainty in calibration and operation of the radiation thermometer, and proper construction and use of the test furnace are of primary importance.  
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1.1 This test method covers the calibration of refractory metal thermocouples using a radiation thermometer as the standard instrument. This test method is intended for use with types of thermocouples that cannot be exposed to an oxidizing atmosphere. These procedures are appropriate for thermocouple calibrations at temperatures above 800 °C (1472 °F).  
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1.2.1 Type 1—Bare-wire thermocouple assemblies in which vacuum or an inert or reducing gas is the only electrical insulating medium between the thermoelements.  
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.  
1.2.3 Type 2A—Assemblies in which loose fitting ceramic insulating pieces, such as single-bore or double-bore tubes, are placed over the thermoelements, permanently enclosed and sealed in a loose fitting metal or ceramic tube.  
1.2.4 Type 3—Swaged assemblies in which a refractory insulating powder is compressed around the thermoelements and encased in a thin-walled tube or sheath made of a high melting point metal or alloy.  
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SIGNIFICANCE AND USE
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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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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.
SIGNIFICANCE AND USE
4.1 This specification presents the requirements for impregnated and non-impregnated fiber-insulated thermocouple wire for normally accepted industrial use, but does not attempt to define such usage.  
4.2 A supplement contains the requirements for insulated thermocouple wire that will be exposed to high humidity. The purchase order or inquiry shall specify if the requirements in this supplement are required.
SCOPE
1.1 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.  
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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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ASTM
ASTM E2488-22(Guide)
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.  
1.9 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.  
1.10 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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ASTM
ASTM E2758-22(Guide)
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.  
1.2 The devices covered by this guide are referred to as IR thermometers.  
1.3 The IR thermometers covered in this guide are instruments that are intended to measure temperatures below 2700 °C and measure a narrow to wide band of thermal radiation in the infrared region.  
1.4 This guide covers best practice in using IR thermometers. It addresses concerns that will help the user make better measurements. It also provides graphical tables to help determine the accuracy of measurements.  
1.5 Details on the design and construction of IR thermometers are not covered in this guide.  
1.6 This guide addresses general information on emissivity and how to deal with emissivity when making measurements with an IR thermometer.  
1.7 This guide contains basic information on the classification of different types of IR thermometers.  
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.  
1.9 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.  
1.10 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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ASTM
ASTM E1502-22(Guide)
Standard Guide for Use of Fixed-Point Cells for Reference Temperatures

SIGNIFICANCE AND USE
5.1 A pure material has a well defined phase transition behavior, and the phase transition plateau, a characteristic of the material, can serve as a reproducible reference temperature for the calibration of thermometers. The melting or freezing points of some highly purified metals have been designated as defining fixed points on ITS-90. The fixed points of other materials have been determined carefully enough that they can serve as secondary reference points (see Tables 1 and 2). This guide presents information on the phase transition process as it relates to establishing a reference temperature. (A) Defining fixed point for ITS-90.(B) Realized as melting point.(C) Based on recommendation of International Bureau of Weights and Measures (BIPM) Working Group 2 of the Comité Consultatif de Thermométrie (CCT-WG2); published as: Bedford, R. E., Bonnier, G., Maas, H., and Pavese, F., "Recommended Values of Temperature on the International Temperature Scale of 1990 for a Selected Set of Secondary Reference Points", Metrologia, Vol 33, 1996, pp. 133. DOI: 10.1088/0026-1394/33/2/3.  (A) Values for cells of good design, construction, and material purity used with careful technique. Cells of lesser quality may not approach these values.(B) Realized as melting point.  
5.2 Fixed-point cells provide users with a means of realizing melting and freezing points. If the cells are appropriately designed and constructed, if they contain material of adequate purity, and if they are properly used, they can establish reference temperatures with uncertainties of a few millikelvins or less. This guide describes some of the design and use considerations.  
5.3 Fixed-point cells can be constructed and operated less stringently than required for millikelvin uncertainty, yet still provide reliable, durable, easy-to-use fixed points for a variety of industrial calibration and heat treatment purposes. For example, any freezing-point cell can be operated, often advantageously, as a melting-po...
SCOPE
1.1 This guide describes the essential features of fixed-point cells and auxiliary apparatus, and the techniques required to realize fixed points in the temperature range from 29 °C to 1085 °C.3  
1.2 Design and construction requirements of fixed-point cells are not addressed in this guide. Typical examples are given in Figs. 1 and 2.
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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