ASTM D8092-17
(Test Method)Standard Test Method for Field Determination of Kinematic Viscosity Using a Microchannel Viscometer
Standard Test Method for Field Determination of Kinematic Viscosity Using a Microchannel Viscometer
SIGNIFICANCE AND USE
5.1 The significance of this test method is that it provides a means for a reliable field determination of kinematic viscosity at 40 °C without requiring solvents or chemicals for cleaning. Field use implies that the fluid may be very opaque, such as an in-service engine oil. The device may be cleaned with a disposable lint-free oil-absorbent material such as a clean cotton shop rag, and requires only 60 µL of sample for operation. As such the device provides a unique service to a range of industries where it is difficult or undesirable to obtain chemicals of any sort in order to determine the kinematic viscosity of their fluid of interest. Examples of such industries include many marine-based systems where a laboratory does not exist on-board, mines where equipment is needed for on-the-spot determination of asset viscosity, and large industrial plants where a walk-around inspection of oil sumps greatly increases efficiency. By using this test method, one can serve these crucial use-cases where a direct, immediate measure of kinematic viscosity at 40 °C may otherwise be difficult to obtain.
SCOPE
1.1 This test method describes a means for measuring the kinematic viscosity of transparent and opaque liquids such as new and in-service lubricating oils using a miniature microchannel viscometer at 40 °C in the range of 12.9 mm2/s to 174 mm2/s
1.2 The precision has only been determined for those materials and viscosity ranges, as indicated in Section 17 on Precision and Bias.
1.3 This test method is specifically tailored to obtaining a rapid, direct, temperature- stabilized measure of the kinematic viscosity of new and in-service lubricants in the field in real- time without the use of solvents or chemical cleaning agents. The measurement takes place at 40 °C and kinematic viscosity is directly obtained. No temperature extrapolations or density corrections are necessary.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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. Some specific hazards statements are given in Section 9 on Hazards.
1.6 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
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D8092 − 17
Standard Test Method for
Field Determination of Kinematic Viscosity Using a
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Microchannel Viscometer
This standard is issued under the fixed designation D8092; 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. Referenced Documents
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1.1 This test method describes a means for measuring the
2.1 ASTM Standards:
kinematic viscosity of transparent and opaque liquids such as D445 Test Method for Kinematic Viscosity of Transparent
new and in-service lubricating oils using a miniature micro- and Opaque Liquids (and Calculation of Dynamic Viscos-
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channel viscometer at 40 °C in the range of 12.9 mm /s to ity)
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174 mm /s D2162 Practice for Basic Calibration of Master Viscometers
and Viscosity Oil Standards
1.2 The precision has only been determined for those
D4057 Practice for Manual Sampling of Petroleum and
materials and viscosity ranges, as indicated in Section 17 on
Petroleum Products
Precision and Bias.
D5854 Practice for Mixing and Handling of Liquid Samples
1.3 This test method is specifically tailored to obtaining a
of Petroleum and Petroleum Products
rapid, direct, temperature- stabilized measure of the kinematic
D6708 Practice for StatisticalAssessment and Improvement
viscosity of new and in-service lubricants in the field in real-
of Expected Agreement Between Two Test Methods that
time without the use of solvents or chemical cleaning agents.
Purport to Measure the Same Property of a Material
The measurement takes place at 40 °C and kinematic viscosity
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2.2 ISO Standard:
is directly obtained. No temperature extrapolations or density
ISO/IEC 17025 General Requirements for the Competence
corrections are necessary.
of Testing and Calibration Laboratories
1.4 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
3. Terminology
standard.
3.1 Definitions of Terms Specific to This Standard:
1.5 This standard does not purport to address all of the
3.1.1 Hele-Shaw cell, n—a liquid cell wherein Stokes flow
safety concerns, if any, associated with its use. It is the
is present between two parallel plates.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 3.1.1.1 Discussion—The unbounded microchannel capillary
bility of regulatory limitations prior to use. Some specific acts as a Hele-Shaw cell in this test method, which enables a
hazards statements are given in Section 9 on Hazards. simple relationship between kinematic viscosity and fluid
1.6 This international standard was developed in accor- velocity to be established.
dance with internationally recognized principles on standard- 3.1.2 loading funnel, n—the cavity in Fig. 1 that the liquid
ization established in the Decision on Principles for the is placed into upon sample introduction; the sample then
Development of International Standards, Guides and Recom- travels out of this funnel and enters the capillary.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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This test method is under the jurisdiction of ASTM Committee D02 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Standards volume information, refer to the standard’s Document Summary page on
Subcommittee D02.07.0A on Newtonian Viscosity. the ASTM website.
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Current edition approved May 1, 2017. Published May 2017. DOI: 10.1520/ Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
D8092-17. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D8092 − 17
FIG. 1 Miniature Capillary Viscometer Schematic
3.1.3 miniature capillary viscometer, n—a viscometer, as 4. Summary of Test Method
shown in Fig. 1, which utilizes an unbounded microchannel
4.1 A liquid sample is placed into the loading funnel (see
capillary in order to enable the direct measurement of kine-
Fig. 1) of the miniature capillary viscometer and kinematic
matic viscosity.
viscosity at 40 °C is determined by measuring the time in
3.1.4 unbounded microchannel capillary, n—a rectangular
seconds (∆t) it takes this liquid to travel between the beam
channel, approximately 100 µm by 2 mm, which comprises the
produced by LED (light-emitting diode) #1 and LED
...
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