ASTM-E220 2007

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E220-07 Standard Test Method for Calibration of Thermocouples By Comparison Techniques

Published By	Publication Date	Number of Pages
ASTM	2007	15

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Categories: 17.200.20 - Temperature-measuring instruments, ASTM

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Description

ASTM E220-07

Historical Standard: Standard Test Method for Calibration of Thermocouples By Comparison Techniques

ASTM E220

Scope

1.1 This test method describes the principles, apparatus, and procedure for calibrating thermocouples by comparison with a reference thermometer. Calibrations are covered over temperature ranges appropriate to the individual types of thermocouples within an overall range from approximately 195 to 1700 °C (320 to 3100 F).

1.2 In general, this test method is applicable to unused thermocouples. This test method does not apply to used thermocouples due to their potential material inhomogeneity-the effects of which cannot be identified or quantified by standard calibration techniques. Thermocouples with large-diameter thermoelements and sheathed thermocouples may require special care to control thermal conduction losses.

1.3 In this test method, all values of temperature are based on the International Temperature Scale of 1990. See Guide E 1594.

This standard may involve hazardous materials, operations and equipment. 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 and health practices and determine the applicability of regulatory requirements prior to use.

Keywords

calibration; comparison techniques; thermocouple; thermoelement

ICS Code

ICS Number Code 17.200.20 (Temperature-measuring instruments)

DOI: 10.1520/E0220-07

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Interferences Apparatus
5	Reference Thermometers
6	TABLE 1 TABLE 2
7	Sampling General Procedures
8	Preparation of Thermocouples for Test FIG. 1 FIG. 2
10	Calibration Procedures Calculations
11	Report Uncertainty TABLE 3
12	Keywords TABLE 4
13	X1. APPARATUS X1.1 Wire-Wound Electric Tube Furnaces X1.2 Ceramic Element Electric Tube Furnaces X2. REFERENCE THERMOMETERS X2.1 Standard Platinum Resistance Thermometers TABLE 5
14	X2.2 Industrial Platinum Resistance Thermometers X2.3 Measurement Instruments for Resistance Thermometers X2.4 Liquid-in-Glass Thermometers X2.5 Thermistors X3. TEST FOR STRAY THERMALLY GENERATED EMFS IN COPPER CONNECTING WIRES X3.1 X4. TEST FOR THERMOCOUPLE INHOMOGENEITY X4.1
15	REFERENCES

Additional information

Standard Title	E220-07 Standard Test Method for Calibration of Thermocouples By Comparison Techniques
Published Code	ASTM
Publication Date	2007
Pages Count	15
ICS Codes	17.200.20 - Temperature-measuring instruments