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ASTM E2776-18

(Guide)

Standard Guide for Correlation of Results of Solid Particle Size Measurement Instruments

Standard Guide for Correlation of Results of Solid Particle Size Measurement Instruments

SIGNIFICANCE AND USE
4.1 It is useful to be able to obtain particle size measurement results of a user specified product from multiple instruments and to be able to correlate the results of the measurements. This capability can be advantageous in expanding the use of different technologies to make a measurement or simply to correlate results between instruments of the same technology. An example might be comparing in-process particle size measurements to final inspection particle size measurements.  
4.2 The viability of this guide will need to be tested on a case-by-case basis as various products may present measurement challenges for some instruments and not all results from all instruments may be able to be correlated to all other results from all other instruments. In addition, positive results should be confirmed and improved with continued data comparisons over time using process measurements from the instruments selected.
SCOPE
1.1 This guide describes one methodology to correlate solid particle analysis results between solid particle analysis instruments for user specified products of user specified particle sizes and distributions in order to expand the capability of particle measurement throughout the manufacturing process and provide better control and efficiency. The guide is not limited to instrument type or product type.  
1.2 Warning—All instruments may not correlate to all other instruments for various user specified products and size ranges. Instruments may measure different particle features, and they may also measure the same particle features differently and thus correlating the results of any two may be possible for some products but not possible for others. It is also the case that certain materials can be altered by the instruments measuring them which would eliminate them from consideration under this guide if the instrument’s results are determined based on measurements made after the instrument has altered the user specified product.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 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
Historical
Publication Date
31-Mar-2018
ICS
19.120 - Particle size analysis. Sieving
Technical Committee
E29 - Particle and Spray Characterization
Drafting Committee
E29.02 - Non-Sieving Methods
Current Stage
Ref Project

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ASTM E2776-18 - Standard Guide for Correlation of Results of Solid Particle Size Measurement InstrumentsASTM E2776-18 - Standard Guide for Correlation of Results of Solid Particle Size Measurement Instruments
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ASTM E2776-18 - Standard Guide for Correlation of Results of Solid Particle Size Measurement Instruments
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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: E2776 − 18
Standard Guide for
Correlation of Results of Solid Particle Size Measurement
1
Instruments
This standard is issued under the fixed designation E2776; 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 2. Terminology
1.1 This guide describes one methodology to correlate solid 2.1 Definitions of Terms Specific to This Standard:
particle analysis results between solid particle analysis instru-
2.1.1 bin, n—a user specified division of the overall particle
mentsforuserspecifiedproductsofuserspecifiedparticlesizes
size range of a user specified product.
and distributions in order to expand the capability of particle
2.1.2 correlation, n—mathematical equation(s) relating one
measurement throughout the manufacturing process and pro-
set of numerical values to another.
vide better control and efficiency. The guide is not limited to
instrument type or product type.
2.1.3 particle analysis instrument, n—any instrument of any
type that can produce a particle size distribution measurement
1.2 Warning—All instruments may not correlate to all
of a product. There is no restriction on technology or method-
other instruments for various user specified products and size
ology used by the instrument to measure particles nor is there
ranges. Instruments may measure different particle features,
any restriction of particle characteristics used to report results
and they may also measure the same particle features differ-
of the measurement.
ently and thus correlating the results of any two may be
possible for some products but not possible for others. It is also
2.1.4 user specified product, n—indicates a product manu-
the case that certain materials can be altered by the instruments
factured by the user to a specified size distribution, usually
measuring them which would eliminate them from consider-
indicated by common sieve screen sizes.
ation under this guide if the instrument’s results are determined
based on measurements made after the instrument has altered
3. Summary of Guide
the user specified product.
3.1 This guide describes a method which can be used to
1.3 The values stated in SI units are to be regarded as
correlate results between instruments which measure particle
standard. No other units of measurement are included in this
size, and distribution, of materials by the same or different
standard.
parameters and principles.
1.4 This standard does not purport to address all of the
3.2 The primary interest is the correlation of particle size
safety concerns, if any, associated with its use. It is the
measurements of user specified products.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
3.3 This guide can be used for any two particle measuring
mine the applicability of regulatory limitations prior to use.
instruments which output a user specified distribution and have
1.5 This international standard was developed in accor-
the capacity to shift bin boundaries within the software.
dance with internationally recognized principles on standard-
Therefore, a set of sieves cannot correlate to another
ization established in the Decision on Principles for the
instrument, but another instrument may correlate to the set of
Development of International Standards, Guides and Recom-
sieves. Ideally the bin boundaries for the correlating instrument
mendations issued by the World Trade Organization Technical
would match the bin boundaries of the primary instrument, or
Barriers to Trade (TBT) Committee.
if correlating to sieves, match the range of each corresponding
sieve, but if they do not, the method described in this document
could be used to adjust the individual bin boundaries used by
the correlating instrument to make the volume percent detected
for each bin closely match the percent retained by each
corresponding bin of the primary instrument or set of sieves.
1
This guide is under the jurisdiction of ASTM Committee E29 on Particle and
Spray Characterization and is the direct responsibility of Subcommittee E29.02 on
3.4 The guide is valid for any two instruments as long as it
Non-Sieving Methods.
can be demonstrated that the correlation results are useful to
Current edition approved April 1, 2018. Published May 2018. DOI: 10.1520/
E2776-18. the user.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2776 − 18
4. Significance and Use 5.6 Calculate the variation and average repeatability of the
corre
...

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