ASTM E1860-07
(Test Method)Standard Test Method for Elapsed Time Calibration Thermal Analyzers
Standard Test Method for Elapsed Time Calibration Thermal Analyzers
SIGNIFICANCE AND USE
Most thermal analysis experiments are carried out under temperature ramp conditions where temperature is the independent parameter. Some experiments, however, are carried out under isothermal temperature conditions where the elapsed time to an event is measured as the independent parameter. Isothermal Kinetics (Test Methods E 2070), Thermal Stability (Test Method E 487), Oxidative Induction Time (OIT) (Test Methods D 3895, D 4565, D 5483, E 1858, and Specification D 3350 and Loss-on-Drying (Test Method E 1868) are common examples of these kinds of experiments.
Modern scientific instruments, including thermal analyzers, usually measure elapsed time with excellent precision and accuracy. In such cases, it may only be necessary to confirm the performance of the instrument by comparison to a suitable reference. Only rarely will it may be required to correct the calibration of an instrument’elapsed time signal through the use of a calibration factor.
It is necessary to obtain elapsed time signal conformity only to 0.1 times the repeatability relative standard deviation (standard deviation divided by the mean value) expressed as a percent for the test method in which the thermal analyzer is to be used. For those test methods listed in Section 2 this conformity is 0.1 %.
SCOPE
1.1 This test method describes the calibration or performance confirmation of the elapsed-time signal from thermal analyzers.
1.2 SI units are the standard.
1.3 There is no ISO standard equivalent to this method.
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation: E1860 − 07
StandardTest Method for
1
Elapsed Time Calibration of Thermal Analyzers
This standard is issued under the fixed designation E1860; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope E1858 Test Method for Determining Oxidation Induction
Time of Hydrocarbons by Differential Scanning Calorim-
1.1 This test method describes the calibration or perfor-
etry
mance confirmation of the elapsed-time signal from thermal
E1868 Test Method for Loss-On-Drying by Thermogravim-
analyzers.
etry
1.2 The values stated in SI units are to be regarded as
E2161 Terminology Relating to Performance Validation in
standard. No other units of measurement are included in this
Thermal Analysis
standard.
3. Terminology
1.3 There is no ISO standard equivalent to this method.
3.1 Definitions:
1.4 This standard does not purport to address all of the
3.1.1 The technical terms used in this test method are
safety concerns, if any, associated with its use. It is the
defined in Terminologies E473, E1142, and E2161, including
responsibility of the user of this standard to establish appro-
calibration, conformance, relative standard deviation, and ther-
priate safety and health practices and determine the applica-
mal analysis.
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
2.1 ASTM Standards:
is compared to a clock (or timer) whose performance is known
D3350 Specification for Polyethylene Plastics Pipe and Fit-
and traceable to a national metrology institute. The thermal
tings Materials
analyzer may be said to be in conformance, if the performance
D3895 Test Method for Oxidative-Induction Time of Poly-
of the thermal analyzer is within established limits.
olefins by Differential Scanning Calorimetry
Alternatively, the elapsed time signal may be calibrated using
D4565 Test Methods for Physical and Environmental Per-
a two point calibration method.
formance Properties of Insulations and Jackets for Tele-
5. Significance and Use
communications Wire and Cable
D5483 Test Method for Oxidation Induction Time of Lubri-
5.1 Most thermal analysis experiments are carried out under
catingGreasesbyPressureDifferentialScanningCalorim-
temperature ramp conditions where temperature is the inde-
etry
pendent parameter. Some experiments, however, are carried
E473 Terminology Relating to Thermal Analysis and Rhe-
out under isothermal temperature conditions where the elapsed
ology
time to an event is measured as the independent parameter.
E487 Test Method for Constant-Temperature Stability of
Isothermal Kinetics (Test Methods E2070), Thermal Stability
Chemical Materials
(Test Method E487), Oxidative Induction Time (OIT) (Test
E691 Practice for Conducting an Interlaboratory Study to
Methods D3895, D4565, D5483, E1858, and Specification
Determine the Precision of a Test Method
D3350 and Loss-on-Drying (Test Method E1868) are common
E1142 Terminology Relating to Thermophysical Properties
examples of these kinds of experiments.
5.2 Modern scientific instruments, including thermal
analyzers, usually measure elapsed time with excellent preci-
1
ThistestmethodisunderthejurisdictionofASTMCommitteeE37onThermal
sion and accuracy. In such cases, it may only be necessary to
Measurements and is the direct responsibility of Subcommittee E37.10 on
Fundamental, Statistical and Mechanical Properties.
confirm the performance of the instrument by comparison to a
Current edition approved March 1, 2007. Published April 2007. Originally
suitable reference. Only rarely will it may be required to
approved in 1997. Last previous edition approved in 2002 as E1860 – 02. DOI:
correct the calibration of an instrument’s elapsed time signal
10.1520/E1860-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or through the use of a calibration factor.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.3 It is necessary to obtain elapsed time signal conformity
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. only to 0.1 times the repeatability relative standard deviation
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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E1860 − 07
(standard deviation divided by the mean value) expressed as a t 5 t S (1)
o
percent for the test method in which the thermal analyzer is to
where:
be used. For those test methods listed in Section 2 this
t = true ex
...
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