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ASTM-E1750:2023 Edition

ASTM-E1750:2023 Edition

$34.13

E1750-23 Standard Guide for Use of Water Triple Point Cells

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ASTM 2023
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ASTM E1750-23

Active Standard: Standard Guide for Use of Water Triple Point Cells

ASTM E1750

Scope

1.1 This guide covers the nature of two commercial water triple-point cells (types A and B, see Fig. 1) and provides a method for preparing the cell to realize the water triple-point and calibrate thermometers. The qualifications concerning preparation and the types of glass used for a cell are discussed. Tests for assuring the integrity of a qualified cell and of cells yet to be qualified are given. Precautions for handling the cell to avoid breakage are also described.

FIG. 1 Configurations of two commonly used triple point of water cells, Type A and Type B, with ice mantle prepared for measurement at the ice/water equilibrium temperature. The cells are used immersed in an ice bath or water bath controlled close to 0.01 °C (see 5.5)

1.2 The effect of hydrostatic pressure on the temperature of a water triple-point cell is discussed.

1.3 Procedures for adjusting the observed SPRT resistance readings for the effects of self-heating and hydrostatic pressure are described in Appendix X1 and Appendix X2.

1.4 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.

1.5 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.

Keywords

calibration; defining fixed point; fixed point; hydrostatic head pressure; International Temperature Scale of 1990 (ITS-90); intrinsic property; Kelvin Thermodynamic Temperature Scale (KTTS); qualification; self-heating; standard platinum resistance thermometer (SPRT); triple point; triple point of water; water triple point cell ;

ICS Code

ICS Number Code 17.200.20 (Temperature-measuring instruments)

DOI: 10.1520/E1750-23

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