ASTM D6543-17
(Guide)Standard Guide to the Evaluation of Measurements Made by Online Coal Analyzers
Standard Guide to the Evaluation of Measurements Made by Online Coal Analyzers
SIGNIFICANCE AND USE
5.1 Online analyzers are used to provide quality data on lots of coal. The resulting quality data are used as a production tool or for some contractual application. This guide provides the means of evaluating the analyzer system and the data produced.
5.2 Become familiar with the document's terminology and layout. The section on test design and data collection will provide the means by which all the analysis data will be gathered. The test should be carefully designed to ensure the user’s requirements are met.
5.3 The procedures defined in this guide can be used to estimate the accuracy and precision of an online analyzer, (1) to conduct acceptance testing following installation and (2) to monitor the accuracy and precision (a) during routine use (quality control), (b) when significant changes are made to the analyzer, and (c) when a significant change in the coal being analyzed occurs (e.g., a different seam at a mine, or a new coal source at a power plant). These procedures can also be used for calibration purposes.
SCOPE
1.1 This guide provides techniques to be used for the evaluation of the measurement performance of online coal analyzers.
1.2 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.
1.3 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.
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Designation: D6543 − 17
Standard Guide to
the Evaluation of Measurements Made by Online Coal
1
Analyzers
This standard is issued under the fixed designation D6543; 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 3.2.1 analyzer system, n—a coal quality measurement sys-
tem which includes an online coal analyzer and which may
1.1 This guide provides techniques to be used for the
include one or more stages of a coal-sampling system.
evaluation of the measurement performance of online coal
analyzers.
3.2.2 calibration, n—mathematical modeling of analyzer
and comparative coal sampling and analysis data. Factors from
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the the model are used in the online analyzer control software.
responsibility of the user of this standard to establish appro-
3.2.3 full-stream analyzer, n—an analyzer system that inter-
priate safety and health practices and determine the applica-
rogates the coal on a process belt.
bility of regulatory limitations prior to use.
1.3 This international standard was developed in accor- 3.2.4 Latent Variable Model, n—a mathematical model that
dance with internationally recognized principles on standard- can estimate each system’s precision, when the analyzer is
ization established in the Decision on Principles for the
compared to two independent reference systems.
Development of International Standards, Guides and Recom-
3.2.5 online analyzer, n—an analytical tool consisting of an
mendations issued by the World Trade Organization Technical
instrumentandsystems,whichtogetherprovidemeasurements,
Barriers to Trade (TBT) Committee.
or estimates, or both, of coal quality parameters.
2. Referenced Documents
3.2.6 outlier, n—an extreme value that statistical tests indi-
2
cate to be far enough from other results in a population under
2.1 ASTM Standards:
consideration to cause suspicion that the value is not a member
D121 Terminology of Coal and Coke
D2013 Practice for Preparing Coal Samples for Analysis of the population.
D2234/D2234M Practice for Collection of a Gross Sample
3.2.7 reference material, n—material of stable composition
of Coal
that may be used to generate static analyzer measurements.
D6518 Practice for Bias Testing a Mechanical Coal Sam-
3
3.2.8 reference system, n—a measurement system used to
pling System (Withdrawn 2008)
D7430 Practice for Mechanical Sampling of Coal measure the characteristics of a lot of coal that are also
E178 Practice for Dealing With Outlying Observations measured by an online analyzer, and against which the online
analyzer measurements are compared.
3. Terminology
3.2.9 sample stream analyzer, n—an analyzer system that is
3.1 Definitions—For additional definitions of terms used in
fed a save or reject stream from a sampling system.
this standard, refer to Terminology D121.
3.2.10 standardization, n—calibration of an instrument to a
3.2 Definitions of Terms Specific to This Standard:
reference material using static stability measurements.
3.2.11 static stability, n—an estimate of the measurement
1
This guide is under the jurisdiction of ASTM Committee D05 on Coal and
precision of an instrument obtained on material that is not
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
moving. The estimate normally is expressed as the standard
Current edition approved June 1, 2017. Published June 2017. Originally
deviation and average of the measurements for a given period
approved in 2000. Last previous edition approved in 2015 as D6543-15. DOI:
10.1520/D6543-17.
of time.
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
3.2.12 synchronization error, n—an error that occurs from
Standards volume information, refer to the standard’s Document Summary page on
comparing measurements made by an online analyzer and a
the ASTM website.
3 reference system that are not measuring exactly the same lot
The last approved version of this historical standard is referenced on
www.astm.org. because of temporal and/or spatial offsets.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D6543 − 17
4. Summary of Guide addition to comparative tests, standardization or static tests, or
both, as recommended by the online analyzer manufacturer,
4.1 This guide describes how to measure performance of an
may be helpful.
online analyzer us
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6543 − 15 D6543 − 17
Standard Guide to
the Evaluation of Measurements Made by Online Coal
1
Analyzers
This standard is issued under the fixed designation D6543; 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
1.1 This guide provides techniques to be used for the evaluation of the measurement performance of online coal analyzers.
1.2 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.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D121 Terminology of Coal and Coke
D2013 Practice for Preparing Coal Samples for Analysis
D2234/D2234M Practice for Collection of a Gross Sample of Coal
3
D6518 Practice for Bias Testing a Mechanical Coal Sampling System (Withdrawn 2008)
D7430 Practice for Mechanical Sampling of Coal
E178 Practice for Dealing With Outlying Observations
3. Terminology
3.1 Definitions—For additional definitions of terms used in this standard, refer to Terminology D121.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 analyzer system, n—a coal quality measurement system which includes an online coal analyzer and which may include
one or more stages of a coal-sampling system.
3.2.2 calibration, n—mathematical modeling of analyzer and comparative coal sampling and analysis data. Factors from the
model are used in the online analyzer control software.
3.2.3 full-stream analyzer, n—an analyzer system that interrogates the coal on a process belt.
3.2.4 Latent Variable Model, n—a mathematical model that can estimate each system’s precision, when the analyzer is
compared to two independent reference systems.
3.2.5 online analyzer, n—an analytical tool consisting of an instrument and systems, which together provide measurements, or
estimates, or both, of coal quality parameters.
3.2.6 outlier, n—an extreme value that statistical tests indicate to be far enough from other results in a population under
consideration to cause suspicion that the value is not a member of the population.
3.2.7 reference material, n—material of stable composition that may be used to generate static analyzer measurements.
1
This guide is under the jurisdiction of ASTM Committee D05 on Coal and Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
Current edition approved Jan. 1, 2015June 1, 2017. Published January 2015June 2017. Originally approved in 2000. Last previous edition approved in 20142015 as
D6543-14b.-15. DOI: 10.1520/D6543-15.10.1520/D6543-17.
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.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6543 − 17
3.2.8 reference system, n—a measurement system used to measure the characteristics of a lot of coal that are also measured by
an online analyzer, and against which the online analyzer measurements are compared.
3.2.9 sample stream analyzer, n—an analyzer system that is fed a save or reject stream from a sampling system.
3.2.10 standardization, n—calibration of an instrument to a reference material using static stability measurements.
3.2.11 static stability, n—an estimate of the measurement precision of an instrument obtained on material that is not moving.
The estimate normally is expressed as the standard deviation and average of the measurements for a given period of time.
3.2.12 synchronization error, n—an error that occurs from comparing measurements made by an online analyzer and a reference
syst
...
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