ASTM E452 - 02(2018) - Standard Test Method for Calibration of Refractory Metal Thermocouples Using a Radiation Thermometer

ASTM E452 - 02(2018)

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

Status : Current   Published : April 2018

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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).

1.2 The calibration method is applicable to the following thermocouple assemblies:

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.

1.2.5  Type 4—Thermocouple assemblies in which one thermoelement is in the shape of a closed-end protection tube and the other thermoelement is a solid wire or rod that is coaxially supported inside the closed-end tube. The space between the two thermoelements can be filled with an inert or reducing gas, or with ceramic insulating materials, or kept under vacuum.

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.




Standard NumberASTM E452 - 02(2018)
TitleStandard Test Method for Calibration of Refractory Metal Thermocouples Using a Radiation Thermometer
StatusCurrent
Publication Date01 April 2018
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors High-temperature calibration, optical pyrometer, radiation thermometer, refractory metal thermocouple, thermocouple, thermocouple calibration, vacuum furnace
ICS17.200.20
PublisherASTM
FormatA4
DeliveryYes
Pages14
File Size501 KB
Price£45.00


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