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ASTM E 780 : 2017 : REDLINE

Current
Current

The latest, up-to-date edition.

Standard Test Method for Measuring the Insulation Resistance of Mineral-Insulated, Metal-Sheathed Thermocouples and Mineral-Insulated, Metal-Sheathed Cable at Room Temperature
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PDF

Language(s)

English

Published date

06-19-2017

CONTAINED IN VOL. 14.03, 2017 Gives the procedures for measuring the room temperature electrical insulation resistance between the thermoelements and between the thermoelements and the sheath, of a mineral-insulated, metal-sheathed (MIMS) thermocouple or mineral-insulated, metal-sheathed (MIMS) thermocouple cable or between the conductors and between the conductors and the sheath, of mineral-insulated, metalsheathed (MIMS) cable used for industrial resistance thermometers.

1.1This test method provides the procedures for measuring the room temperature electrical insulation resistance between the thermoelements and between the thermoelements and the sheath, of a mineral-insulated, metal-sheathed (MIMS) thermocouple or mineral-insulated, metal-sheathed (MIMS) thermocouple cable or between the conductors and between the conductors and the sheath, of mineral-insulated, metal-sheathed (MIMS) cable used for industrial resistance thermometers. It may be used to measure the insulation resistance of bulk lengths of mineral-insulated, metal-sheathed MIMS cable previously sealed against moisture intrusion or to test a thermocouple having an ungrounded measuring junction. This method cannot be used to test a thermocouple having a grounded measuring junction unless the measuring junction is removed prior to testing, after which the thermocouple may be dealt with in the same manner as a mineral-insulated, metal-sheathed (MIMS) cable.

1.2This test method applies primarily to thermocouple cables and cable used for industrial resistance thermometers conforming to Specifications E585/E585M, E2181/E2181M, and E2821 and to thermocouples conforming to Specifications E608/E608M and E2181/E2181M, but may also be applied to thermocouples or MIMS cables that are suitable for use in air, whose sheath or thermoelements or conductors are comprised of refractory metals, that are tested in a dry and chemically inert environment, and that may employ compacted ceramic insulating materials other than magnesia (MgO) or alumina (Al2O3). Users of this test method should note that specifications dealing with compacted ceramic insulating materials other than magnesia or alumina, which are described in Specification E1652, are not currently available. As a result, acceptance criteria must be agreed upon between the customer and supplier at the time of purchase, or alternatively, judgment and experience must be applied in establishing test voltage levels and acceptable insulation resistance values for these types of thermocouples and MIMS cables.

1.3This test method may be used for thermocouples or MIMS cables having an outside diameter of 0.5 mm (0.020 in.) or larger.

1.4Users of this test method should be aware that the room temperature insulation resistance of a mineral-insulated, metal-sheathed thermocouple or MIMS cable will change during shipment, storage, or use if they are not properly sealed.

1.5The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.6This 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.

Committee
E 20
DocumentType
Redline
Pages
5
PublisherName
American Society for Testing and Materials
Status
Current

ASTM E 585/E585M : 2012-06 SPECIFICATION FOR COMPACTED MINERAL-INSULATED, METAL-SHEATHED, BASE METAL THERMOCOUPLE CABLE
ISA 67.06.01 : 2002 PERFORMANCE MONITORING FOR NUCLEAR SAFETY-RELATED INSTRUMENT CHANNELS IN NUCLEAR POWER PLANTS
ASTM E 235/E235M : 2012 : R2018 Standard Specification for Type K and Type N Mineral-Insulated, Metal-Sheathed Thermocouples for Nuclear or for Other High-Reliability Applications
ASTM E 839 : 2011 Standard Test Methods for Sheathed Thermocouples and Sheathed Thermocouple Cable
ASTM E 608/E608M : 2013 : REDLINE SPECIFICATION FOR MINERAL-INSULATED, METAL-SHEATHED BASE METAL THERMOCOUPLES
ASTM E 2846 : 2014-10 GUIDE FOR THERMOCOUPLE VERIFICATION
ASTM E 235/E235M : 2012 Standard Specification for Type K and Type N Mineral-Insulated, Metal-Sheathed Thermocouples for Nuclear or for Other High-Reliability Applications
ASTM E 1350 : 2013-08 GUIDE FOR TESTING SHEATHED THERMOCOUPLES, THERMOCOUPLES ASSEMBLIES, AND CONNECTING WIRES PRIOR TO, AND AFTER INSTALLATION OR SERVICE
ASTM E 608/E608M : 2013 : R2019 Standard Specification for Mineral-Insulated, Metal-Sheathed Base Metal Thermocouples
ASTM E 2821 : 2013 Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers
ASTM E 839 : 2011 : R2016 : EDT 1 Standard Test Methods for Sheathed Thermocouples and Sheathed Thermocouple Cable
ASTM E 344 : 2016-12 TERMINOLOGY RELATING TO THERMOMETRY AND HYDROMETRY

ASTM E 585/E585M : 2012-06 SPECIFICATION FOR COMPACTED MINERAL-INSULATED, METAL-SHEATHED, BASE METAL THERMOCOUPLE CABLE
ASTM E 1652 : 2015 : REDLINE Standard Specification for Magnesium Oxide and Aluminum Oxide Powder and Crushable Insulators Used in the Manufacture of Base Metal Thermocouples, Metal-Sheathed Platinum Resistance Thermometers, and Noble Metal Thermocouples
ASTM E 608/E608M : 2013 : REDLINE SPECIFICATION FOR MINERAL-INSULATED, METAL-SHEATHED BASE METAL THERMOCOUPLES
ASTM E 2821 : 2013 Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed Cable Used in Industrial Resistance Thermometers
ASTM E 344 : 2016-12 TERMINOLOGY RELATING TO THERMOMETRY AND HYDROMETRY
ASTM E 2181/E2181M : 2011 Standard Specification for Compacted Mineral-Insulated, Metal-Sheathed, Noble Metal Thermocouples and Thermocouple Cable

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