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ASTM D6543-00(2012)

(Guide)

Standard Guide to the Evaluation of Measurements Made by On-Line Coal Analyzers

Standard Guide to the Evaluation of Measurements Made by On-Line Coal Analyzers

SIGNIFICANCE AND USE
5.1 On-line 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 means of evaluating the system and data produced.  
5.2 The user should 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 design should be carefully considered so as to assure meeting the user's requirements.  
5.3 The procedures defined in this guide can be used to test the accuracy and precision of an on-line analyzer, for acceptance after its installation, to check precision and accuracy during routine use (quality control), when changes are made to the system, when the nature of the coal being tested changes, and to determine mathematical factors to be used for calibration of the on-line analyzer.
SCOPE
1.1 This guide provides techniques to be used for the evaluation of the measurement performance of on-line 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.

General Information

Status
Historical
Publication Date
31-Aug-2012
ICS
73.040 - Coals
Technical Committee
D05 - Coal and Coke
Drafting Committee
D05.23 - Sampling
Current Stage
Ref Project

Relations

Replaces
ASTM D6543-00(2006) - Standard Guide to the Evaluation of Measurements Made by On-Line Coal Analyzers
Effective Date
01-Sep-2012
Replaced By
ASTM D6543-00(2012)e1 - Standard Guide to the Evaluation of Measurements Made by Online Coal Analyzers
Effective Date
01-Sep-2012

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ASTM D6543-00(2012) - Standard Guide to the Evaluation of Measurements Made by On-Line Coal AnalyzersASTM D6543-00(2012) - Standard Guide to the Evaluation of Measurements Made by On-Line Coal Analyzers
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ASTM D6543-00(2012) - Standard Guide to the Evaluation of Measurements Made by On-Line Coal Analyzers
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D6543 − 00(Reapproved 2012)
Standard Guide to
the Evaluation of Measurements Made by On-Line 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 3.1.2 calibration, n—mathematical modeling of analyzer
and comparative coal sampling and analysis data. Factors from
1.1 This guide provides techniques to be used for the
the model are used in the on-line analyzer control software.
evaluation of the measurement performance of on-line coal
3.1.3 Grubbs estimator, n—an estimate of the measurement
analyzers.
4
precision of an on-line analyzer (1-3).
1.2 This standard does not purport to address all of the
3.1.4 on-line analyzer, n—an analytical tool consisting of an
safety concerns, if any, associated with its use. It is the
instrumentandsystems,whichtogetherprovidemeasurements,
responsibility of the user of this standard to establish appro-
or estimates, or both, of coal quality parameters.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.1.5 outlier, n—an extreme value that statistical tests indi-
cate to be far enough from other results in a population under
2. Referenced Documents consideration to cause suspicion that the value is not a member
of the population.
2
2.1 ASTM Standards:
3.1.6 reference material, n—material of stable composition
D121 Terminology of Coal and Coke
that may be used to generate static analyzer measurements.
D2013 Practice for Preparing Coal Samples for Analysis
D2234/D2234M Practice for Collection of a Gross Sample
3.1.7 reference system, n—a measurement system used to
of Coal
measure the characteristics of a lot of coal that are also
D4702 Practice for Quality Management of Mechanical
measuredbyanon-line-analyzer,andagainstwhichtheon-line
3
Coal Sampling Systems (Withdrawn 2008)
analyzer measurements are compared.
D6518 Practice for Bias Testing a Mechanical Coal Sam-
3.1.8 standardization, n—calibration of an instrument to a
3
pling System (Withdrawn 2008)
reference material using static stability measurements.
E177 Practice for Use of the Terms Precision and Bias in
3.1.9 static stability, n—an estimate of the measurement
ASTM Test Methods
precision of an instrument obtained on material that is not
E178 Practice for Dealing With Outlying Observations
moving. The estimate normally is expressed as the standard
E456 Terminology Relating to Quality and Statistics
deviation and average of the measurements for a given period
of time.
3. Terminology
3.1.10 synchronization error, n—an error that occurs from
3.1 Definitions:
comparing measurements made by an on-line analyzer and a
3.1.1 analyzer system, n—a coal quality measurement sys-
reference system that are not measuring exactly the same lot
tem which includes an on-line coal analyzer and which may
because of temporal and/or spatial offsets.
include one or more stages of a coal-sampling system.
4. Summary of Guide
4.1 This guide outlines the evaluation of the measurement
1
This guide is under the jurisdiction of ASTM Committee D05 on Coal and
performance of an on-line analyzer using comparative mea-
Coke and is the direct responsibility of Subcommittee D05.23 on Sampling.
surements. The comparative test uses a paired comparison of
Current edition approved Sept. 1, 2012. Published November 2012. Originally
analysis from a reference method using ASTM sampling,
approved in 2000. Last previous edition approved in 2006 as D6543–00(2006).
DOI: 10.1520/D6543-00R12.
sample preparation, and analysis methods for a lot of coal with
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
the analysis from the on-line analyzer for the same lot of coal.
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 4
The last approved version of this historical standard is referenced on The boldface numbers in parentheses refer to the list of references at the end of
www.astm.org. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D6543 − 00 (2012)
The data resulting from the comparative test may be evaluated 6.1.4.5 Coal flow rates; and
using graphical and statistical techniques outlined below. 6.1.4.6 Power disturbances.
4.2 Various techniques are recommended by on-line ana-
6.2 Static Stability Measurements for Baseline
lyzer
...

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1.2.3 Group A allows smaller weight laboratory samples to be retained than Group B. These lower weights may be used for particular coals if they have been shown, by using the procedures of A1.2, to give a sample preparation and analysis variance which is no more than 20 % of the total analysis variance.  
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4.1 Briquets of granular bituminous coals and anthracite prepared in accordance with the laboratory procedures of this practice will have flat, scratch-free surfaces suitable for examination with a microscope using reflected light illumination. The polished surfaces of briquettes prepared by this practice will contain particles representative of the original gross sample.  
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1.2 Units—The values stated in either SI units or non-SI units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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3.1 This test method concerns the compaction of crushed coal to determine either its compacted or uncompacted bulk density, for purposes such as charging coke ovens.
SCOPE
1.1 This test method covers two procedures for determining the bulk density of crushed coal less than 37.5 mm [1.5 in.] in size, such as is charged into coke ovens, as follows:  
1.1.1 Procedure A—The cone procedure for determining an uncompacted bulk density.
1.1.1.1 Standard Method—Procedure employs the use of a 115 mm [4.5 in.] chute opening and a measuring box having dimensions of 305 mm x 305 mm x 305 mm [12.0 in. x 12.0 in. x 12.0 in.].
1.1.1.2 Alternate Method—Procedure employs the use of a 203 mm [8.0 in.] chute opening and a measuring box having dimensions of 203 mm x 203 mm x 305 mm [8.0 in. x 8.0 in. x 12.0 in.] for coals with a total moisture greater than 7 %.  
1.1.2 Procedure B—The dropped-coal procedure for determining a compacted bulk density, comparable to actual bulk densities attained in coke ovens.  
1.2 This test method is not applicable to the testing of powdered coal as used in boiler plants, nor to the determination of the bulk density of coal in storage piles.  
1.3 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.  
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