ASTM D6543-20e1

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 (for example, 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, health, and environmental 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.

General Information

• Status: Published
• Publication Date: 31-Jan-2020
• ICS: 73.040 - Coals
• Technical Committee: D05 - Coal and Coke
• Drafting Committee: D05.23 - Sampling

Standards Content (Sample)

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 − 20
Standard Guide to
the Evaluation of Measurements Made by Online Coal
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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.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
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ε NOTE—An editorial correction was made to 7.3.3.5 in November 2022.
1. Scope 3.2 Definitions of Terms Specific to This Standard:
3.2.1 analyzer system, n—a coal quality measurement sys-
1.1 This guide provides techniques to be used for the
tem which includes an online coal analyzer and which may
evaluation of the measurement performance of online coal
include one or more stages of a coal-sampling system.
analyzers.
3.2.2 calibration, n—mathematical modeling of analyzer
1.2 This standard does not purport to address all of the
and comparative coal sampling and analysis data.
safety concerns, if any, associated with its use. It is the
3.2.2.1 Discussion—Factors from the model are used in the
responsibility of the user of this standard to establish appro-
online analyzer control software.
priate safety, health, and environmental practices and deter-
3.2.3 full-stream analyzer, n—an analyzer system that inter-
mine the applicability of regulatory limitations prior to use.
rogates the coal on a process belt.
1.3 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.2.4 Grubbs estimator, n—an estimate of the measurement
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ization established in the Decision on Principles for the
precision of an online analyzer (1-3).
Development of International Standards, Guides and Recom-
3.2.5 Latent Variable Model, n—a mathematical model that
mendations issued by the World Trade Organization Technical
can estimate each system’s precision, when the analyzer is
Barriers to Trade (TBT) Committee.
compared to two independent reference systems.
3.2.6 online analyzer, n—an analytical tool consisting of an
2. Referenced Documents
2 instrumentandsystems,whichtogetherprovidemeasurements,
2.1 ASTM Standards:
or estimates, or both, of coal quality parameters.
D121Terminology of Coal and Coke
3.2.7 outlier, n—an extreme value that statistical tests indi-
D2013Practice for Preparing Coal Samples for Analysis
cate to be far enough from other results in a population under
D2234/D2234MPractice for Collection of a Gross Sample
considerationtocausesuspicionthatthevalueisnotamember
of Coal
of the population.
D6518Practice for Bias Testing a Mechanical Coal Sam-
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pling System (Withdrawn 2008)
3.2.8 reference material, n—material of stable composition
D7430Practice for Mechanical Sampling of Coal
that may be used to generate static analyzer measurements.
E178Practice for Dealing With Outlying Observations
3.2.9 reference system, n—a measurement system used to
measure the characteristics of a lot of coal that are also
3. Terminology
measured by an online analyzer, and against which the online
3.1 Definitions—For additional definitions of terms used in
analyzer measurements are compared.
this standard, refer to Terminology D121.
3.2.10 sample stream analyzer, n—an analyzer system that
is fed a save or reject stream from a sampling system.
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This guide is under the jurisdiction of ASTM Committee D05 on Coal and
3.2.11 standardization, n—calibration of an instrument to a
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
reference material using static stability measurements.
Current edition approved Feb. 1, 2020. Published February 2020. Originally
approved in 2000. Last previous edition approved in 2017 as D6543–17a. DOI:
3.2.12 static stability, n—an estimate of the measurement
10.1520/D6543-20E01.
precision of an instrument obtained on material that is not
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
moving.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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The last approved version of this historical standard is referenced on Theboldfacenumbersinparenthesesrefertothelistofreferencesattheendof
www.astm.org. this standard.
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D6543 − 20
3.2.12.1 Discussion—The estimate normally is expressed as all the performance measures that are gathered on a routine
the standard devi
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