ASTM E1860-02
(Test Method)Standard Test Method for Elapsed Time Calibration Thermal Analyzers
Standard Test Method for Elapsed Time Calibration Thermal Analyzers
SCOPE
1.1 This test method covers the calibration or performance confirmation of the elapsed-time signal from thermal analyzers.
1.2 Electronic instrumentation or automated data analysis and reduction systems or treatments equivalent to this test method may be used.
1.3 SI units are the standard.
1.4 There is no ISO standard equivalent to this method.
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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Standards Content (Sample)
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Designation: E 1860 – 02
Standard Test Method for
1
Elapsed Time Calibration of Thermal Analyzers
This standard is issued under the fixed designation E 1860; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 1858 Test Method for Determining Oxidative Induction
Time of Hydrocarbons by Differential Scanning Calorim-
1.1 This test method covers the calibration or performance
5
etry
confirmation of the elapsed-time signal from thermal analyz-
E 1868 Test Method for Loss-on-Drying byThermogravim-
ers.
5
etry
1.2 Electronic instrumentation or automated data analysis
and reduction systems or treatments equivalent to this test
3. Terminology
method may be used.
3.1 Definitions:
1.3 SI units are the standard.
3.1.1 The technical terms used in this test method are
1.4 There is no ISO standard equivalent to this method.
defined in Terminologies E 473 and E 1142.
1.5 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 relative standard deviation, n—the ratio of the stan-
responsibility of the user of this standard to establish appro-
dard deviation of a series of measurements to their mean value,
priate safety and health practices and determine the applica-
usually expressed as percent.
bility of regulatory limitations prior to use.
4. Summary of Test Method
2. Referenced Documents
4.1 The elapsed time signal generated by a thermal analyzer
2.1 ASTM Standards:
is compared to a clock (or timer) whose performance is known
D 3350 Specification for Polyethylene Plastics Pipe and
2
and traceable to a National Reference Laboratory. The thermal
Fittings Materials
analyzer may be said to be in conformance, if the performance
D 3895 Test Method for Oxidative-Induction Time of Poly-
2
of the thermal analyzer is within established limits. Alterna-
olefins by Differential Scanning Calorimetry
tively, the elapsed time signal may be calibrated using a two
D 4565 Test Methods for Physical and Environmental Per-
point calibration method.
formance Properties of Insulations and Jackets for Tele-
3
communications Wire and Cable
5. Significance and Use
D 5483 Test Method for Oxidation Induction Time of Lu-
5.1 Most thermal analysis experiments are carried out under
bricating Greases by Pressure Differential Scanning Calo-
4 temperature ramp conditions where temperature is the inde-
rimetry
pendent parameter. Some experiments, however, are carried
5
E 473 Terminology Relating to Thermal Analysis
out under isothermal temperature conditions where the elapsed
E 487 Test Method for Constant-Temperature Stability of
time to an event is measured as the independent parameter.
5
Chemical Materials
Isothermal Kinetics (Test Methods E 2070), Thermal Stability
E 691 Practice for Conducting an Interlaboratory Study to
(Test Method E 487), Oxidative Induction Time (OIT) (Test
5
Determine the Precision of a Test Method
Methods D 3895, D 4565, D 5483, E 1858, and Specification
E 1142 Terminology Relating to Thermophysical Proper-
5 D 3350 and Loss-on-Drying (Test Method E 1868) are com-
ties
mon examples of these kinds of experiments.
5.2 Modern scientific instruments, including thermal ana-
1
This test method is under the jurisdiction ofASTM Committee E37 onThermal lyzers, usually measure elapsed time with excellent precision
Measurements and is the direct responsibility of Subcommittee E37.01 on Test
and accuracy. In such cases, it may only be necessary to
Methods.
confirm the performance of the instrument by comparison to a
Current edition approved March 10, 2002. Published June 2002. Originally
suitable reference. Only rarely will it may be required to
published as E1860–97. Last previous edition E1860–97a.
2
Annual Book of ASTM Standards, Vol 08.02.
correct the calibration of an instrument’s elapsed time signal
3
Annual Book of ASTM Standards, Vol 10.02.
through the use of a calibration factor.
4
Annual Book of ASTM Standards, Vol 05.03.
5
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E 1860
t 5 t S (1)
5.3 It is necessary to obtain elapsed time signal conformity
o
only to 0.1 times the repeatability relative standard deviation
where:
(standard deviation divided by the mean value) expressed as a
t = true experimental elapsed time (s),
percent for the test method in which the thermal analyzer is to
t = thermal analyzer observed elapsed time (s), and
o
be us
...
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