ASTM D7843-16
(Test Method)Standard Test Method for Measurement of Lubricant Generated Insoluble Color Bodies in In-Service Turbine Oils using Membrane Patch Colorimetry
Standard Test Method for Measurement of Lubricant Generated Insoluble Color Bodies in In-Service Turbine Oils using Membrane Patch Colorimetry
SIGNIFICANCE AND USE
5.1 This test can be a guide to end-users on the formation of lubricant-generated, insoluble deposits.
5.2 The results from this test are intended to be used as a condition monitoring trending tool as part of a comprehensive program, as outlined in standards such as Practice D4378.
SCOPE
1.1 This test method extracts insoluble contaminants from a sample of in-service turbine oil onto a patch and the color of the membrane patch is analyzed by a spectrophotometer. The results are reported as a ΔE value, within the CIE LAB scale.
1.2 This test method is not appropriate for turbine oils with dyes.
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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D7843 − 16
Standard Test Method for
Measurement of Lubricant Generated Insoluble Color
Bodies in In-Service Turbine Oils using Membrane Patch
1
Colorimetry
This standard is issued under the fixed designation D7843; 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* Determine the Precision of a Test Method
1.1 This test method extracts insoluble contaminants from a
3. Terminology
sample of in-service turbine oil onto a patch and the color of
the membrane patch is analyzed by a spectrophotometer. The
3.1 Definitions:
results are reported as a∆E value, within the CIE LAB scale.
3.1.1 CIELAB color scales, n—CIE 1976 L*, a*, b*
opponent-color scales, in which a* is positive in the red
1.2 This test method is not appropriate for turbine oils with
direction and negative in the green direction; b* is positive in
dyes.
the yellow direction and negative in the blue direction; and L*
1.3 The values stated in SI units are to be regarded as
is positive in the lightness direction and negative in the
standard. No other units of measurement are included in this
darkness direction. E308
standard.
3.1.2 colorimetry, n—the science of color measurement.
1.4 This standard does not purport to address all of the
E284
safety concerns, if any, associated with its use. It is the
3.1.3 in-service oil, n—lubricating oil that is present in a
responsibility of the user of this standard to establish appro-
machine that has been at operating temperature for at least one
priate safety and health practices and determine the applica-
hour(forexample,anengine,gearbox,transformer,orturbine).
bility of regulatory limitations prior to use.
3.1.4 membrane color, n—a visual rating of particulate on a
2. Referenced Documents
filter membrane against ASTM Color Standards.
2
2.1 ASTM Standards:
3.1.5 membrane filter, n—a porous article of closely con-
D4057 Practice for Manual Sampling of Petroleum and
trolled pore size through which a liquid is passed to separate
Petroleum Products
matter in suspension.
D4177 Practice for Automatic Sampling of Petroleum and
3.2 Definitions of Terms Specific to This Standard:
Petroleum Products
3.2.1 varnish, n—a thin, hard, lustrous, oil-insoluble
D4378 Practice for In-Service Monitoring of Mineral Tur-
deposit, composed primarily of organic residue, and most
bine Oils for Steam, Gas, and Combined Cycle Turbines
readily definable by color intensity. It is not easily removed by
E177 Practice for Use of the Terms Precision and Bias in
wiping with a clean, dry, soft, lint-free wiping material and is
ASTM Test Methods
resistant to saturated solvents. Its color may vary, but it usually
E284 Terminology of Appearance
appears in gray, brown, or amber hues.
E308 PracticeforComputingtheColorsofObjectsbyUsing
the CIE System
E691 Practice for Conducting an Interlaboratory Study to 4. Summary of Test Method
4.1 Insoluble deposits are extracted from an in-service
turbine oil sample using a 47 mm, 0.45 µm membrane nitro-
1
This test method is under the jurisdiction of ASTM Committee D02 on
cellulose patch. The color of the patch is then analyzed using
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.C0.01 on Turbine Oil Monitoring, Problems and Systems. a spectrophotometer and the results are reported as a∆E value
Current edition approved June 1, 2016. Published August 2016. Originally
in the CIE LAB scale.
approved in 2012. Last previous edition approved in 2012 as D7843 – 12. DOI:
10.1520/D7843-16.
2 5. Significance and Use
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
5.1 This test can be a guide to end-users on the formation of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. lubricant-generated, insoluble deposits.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7843 − 16
clear sample bottles are acceptable for use provided that the sample bottle,
5.2 The results from this test are intended to be used as a
upon drawing of the sample and throughout the heating/incubation
condition monitoring trending tool as part of a comprehensive
process, is immediately placed and stored into packaging or a storage unit
program, as outlined in standards such as Practice D4378.
that blocks light. Cylindrical cardboard packaging con
...
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: D7843 − 12 D7843 − 16
Standard Test Method for
Measurement of Lubricant Generated Insoluble Color
Bodies in In-Service Turbine Oils using Membrane Patch
1
Colorimetry
This standard is issued under the fixed designation D7843; 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 Scope*
1.1 This test method extracts insoluble contaminants from a sample of in-service turbine oil onto a patch and the color of the
membrane patch is analyzed by a spectrophotometer. The results are reported as a ΔE value, within the CIE LAB scale.
1.2 This test method is not appropriate for turbine oils with dyes.
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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D4057 Practice for Manual Sampling of Petroleum and Petroleum Products
D4177 Practice for Automatic Sampling of Petroleum and Petroleum Products
D4378 Practice for In-Service Monitoring of Mineral Turbine Oils for Steam, Gas, and Combined Cycle Turbines
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E284 Terminology of Appearance
E308 Practice for Computing the Colors of Objects by Using the CIE System
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3. Terminology
3.1 Definitions:
3.1.1 CIELAB color scales, n—CIE 1976 L*, a*, b* opponent-color scales, in which a* is positive in the red direction and
negative in the green direction; b* is positive in the yellow direction and negative in the blue direction; and L* is positive in the
lightness direction and negative in the darkness direction. E308
3.1.2 colorimetry, n—the science of color measurement. E284
3.1.3 in-service oil, n—lubricating oil that is present in a machine that has been at operating temperature for at least one hour
(for example, an engine, gearbox, transformer, or turbine).
3.1.4 membrane color, n—a visual rating of particulate on a filter membrane against ASTM Color Standards.
3.1.5 membrane filter, n—a porous article of closely controlled pore size through which a liquid is passed to separate matter in
suspension.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 varnish, n—a thin, hard, lustrous, oil-insoluble deposit, composed primarily of organic residue, and most readily definable
by color intensity. It is not easily removed by wiping with a clean, dry, soft, lint-free wiping material and is resistant to saturated
solvents. Its color may vary, but it usually appears in gray, brown, or amber hues.
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.C0.01 on Turbine Oil Monitoring, Problems and Systems.
Current edition approved Dec. 1, 2012June 1, 2016. Published January 2013August 2016. Originally approved in 2012. Last previous edition approved in 2012 as
D7843 – 12. DOI: 10.1520/D7843-12.10.1520/D7843-16.
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.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7843 − 16
4. Summary of Test Method
4.1 Insoluble deposits are extracted from an in-service turbine oil sample using a 47 mm, 0.45-micron 47 mm, 0.45 μm
membrane nitro-cellulose patch. The color of the patch is then analyzed using a spectrophotometer and the results are reported as
a ΔE value in the CIE LAB scale.
5. Significance and Use
5.1 This test can be a guide to end-users on the formation of lubricant-generated, insoluble deposits.
5.2 The results from this test are intended to be used as a condition monitoring trend
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.