Standard Practice for Preparation and Use of an Ice-Point Bath as a Reference Temperature

SCOPE
1.1 This practice covers a method of preparing, maintaining, and using a temperature reference bath of a mixture of shaved ice and water, saturated with air at a pressure of 101 325 Pa (1 atm).
1.2 An industrial practice for relating values referenced to the ice point and to the water triple point on the ITS-90 is included.
1.3 Methods to promote uniformity of bath temperature by mechanical stirring or agitation are not described in detail.
1.4 Methods of approximating the ice point, as by thermostatically-controlled refrigeration, are not covered by this practice.
1.5 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 limitations prior to use.

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Historical
Publication Date
09-Oct-2002
Current Stage
Ref Project

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ASTM E563-02e1 - Standard Practice for Preparation and Use of an Ice-Point Bath as a Reference Temperature
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e1
Designation:E563–02
Standard Practice for
Preparation and Use of an Ice-Point Bath as a Reference
1
Temperature
This standard is issued under the fixed designation E563; 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 (e) indicates an editorial change since the last revision or reapproval.
1
e NOTE—Footnote 1 was editorially corrected in March 2005.
1. Scope 3.2 Temperature relationships given in Guide E1594, un-
less otherwise defined herein, apply to temperature values as
1.1 Thispracticecoversamethodofpreparing,maintaining,
used in this practice.
and using a temperature reference bath of a mixture of shaved
3.3 Definitions of Terms Specific to This Standard:
ice and water, saturated with air at a pressure of 101325 Pa (1
3.3.1 ice-point bath, n—physical system containing ice and
atm).
water assembled to realize the ice point as a reference
1.2 An industrial practice for relating values referenced to
temperature, or to establish a constant temperature near 0°C.
the ice point and to the water triple point on the ITS-90 is
included.
4. Summary of Practice
1.3 Methods to promote uniformity of bath temperature by
4.1 The ice-point bath described by this practice consists of
mechanical stirring or agitation are not described in detail.
an intimate mixture, without voids, of pure shaved ice or ice
1.4 Methods of approximating the ice point, as by
particles and distilled air-saturated water in a thermally insu-
thermostatically-controlled refrigeration, are not covered by
lating vessel open to the atmosphere.
this practice.
4.2 The ice bath realization of the ice point physically
1.5 This standard does not purport to address all of the
approximates, with small uncertainty, a natural fixed-point
safety concerns, if any, associated with its use. It is the
temperature.
responsibility of the user of this standard to establish appro-
4.2.1 An ice-point bath prepared using distilled-water ice
priate safety and health practices and determine the applica-
and air-saturated, chilled distilled water, typically has a tem-
bility of regulatory limitations prior to use.
perature of 0.000 6 0.002°C. Consequently, when the bath is
2. Referenced Documents used as a fixed-point temperature reference, the bath tempera-
2
ture is assumed to be 0°C, with an uncertainty that depends on
2.1 ASTM Standards:
the care with which the bath was established and maintained.
D1193 Standard Specification for Reagent Water
4.2.2 Theice-pointbathisopentotheatmosphere;theeffect
E344 Terminology Relating to Thermometry and Hydrom-
of barometric pressure on the ice point is−75 nK/Pa (−7.6
etry
mK/atm). The solubility of air in the water is directly propor-
E1594 Guide for Expression of Temperature
tional to the atmospheric pressure.
3. Terminology
4.3 The ice-bath temperature can also be measured with an
accurately calibrated thermometer or compared to a water
3.1 Definitions—Definitions given in Terminology E344,
triple point cell and the bath temperature is reported as the
unless otherwise defined herein, apply to terms as used in this
measured temperature with an uncertainty that is attributed to
practice.
the measurement, not to the ice point.
1
5. Significance and Use
ThispracticeisunderthejurisdictionofASTMCommitteeE20onTemperature
Measurement and is the direct responsibility of Subcommittee E20.07 on Funda-
5.1 This practice is adequate for use with other ASTM
mentals in Thermometry.
standards that specify the ice point as a reference. It is also
Current edition approved October 10, 2002. Published May 2003. Originally
approved in 1976. Discontinued February 1996 and reinstated in 1997 as
intended to be adequate for most other ice-point reference
E563–97.
purposes.
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.
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E563–02
5.2 The ice point is a common practical industrial reference particles shall be sufficiently small so that the bath approaches
point of thermometry. The ice point is relatively simple to the required state of ice and air-saturated water in intimate
realize and provides a readily available natural fixed-point contact.
reference temperature. 6.4 Cleanliness is essential as small amounts of dissolved
5.3 Use in Resistance Thermometry: salts, and other contaminants can cause the equilibrium tem-
5.3.1 The ice point was a defining fixe
...

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