ASTM D8164-21
(Guide)Standard Guide for Digital Contact Thermometers for Petroleum Products, Liquid Fuels, and Lubricant Testing
Standard Guide for Digital Contact Thermometers for Petroleum Products, Liquid Fuels, and Lubricant Testing
SIGNIFICANCE AND USE
5.1 The information in the examples of this guide are intended to be a starting point for determining the appropriate DCT criteria for a test method that measures a temperature-dependent property of a product within the scope of Committee D02. The criteria examples noted in this guide are based on the liquid-in-glass (LiG) thermometer design components, which are the bulb length, immersion depth, precision of measurement, thermometer position, and so forth. The parameters such as sensor length, immersion depth, and sheath diameter are especially critical when measuring the temperature of small static samples. This is due in part to the difference in thermal conductivity of a LiG vs. a DCT, however other aspects of the devices can contribute to unequal results. For example a DCT that is suitable for use in a stirred constant temperature bath will likely result in measurement errors when used to measure the temperature of a small static sample. This difference can be a degree or more when the sample temperature differs from room temperature by 40 °C or more using a 7 mm probe. This error is due to the difference in thermal conductivity and specific heat value of a DCT and LiG thermometer, however other aspects of the two different devices can contribute unequal results. One way to counter this is by reducing DCT sheath diameter, insulating the sheath above the immersion level, and using a probe that has a small immersion depth as determined by Practice D7962. For more guidance on selecting an appropriate DCT, see Guide E2877.
5.2 When replacing a LiG thermometer with a DCT noted in this guide and the test method does not list any DCT criteria, it is incumbent on the user to verify the suitability of the DCT they have selected. This can be done by comparing measurements made with the selected DCT to those of a LiG thermometer and following the test procedure. Comparative measurements are especially important when measuring the temperature of a small static sample wh...
SCOPE
1.1 The intent of this guide is to suggest an initial configuration and provide guidance when establishing the appropriate criteria needed for a DCT to correctly measure the temperature in a laboratory test method for products within the scope of this committee. This guide includes examples of the approximate digital contact thermometer (DCT) criteria that was found suitable for measuring temperature in the test methods utilized by Committee D02.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
1.4 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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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.
Designation: D8164 − 21
Standard Guide for
Digital Contact Thermometers for Petroleum Products,
1
Liquid Fuels, and Lubricant Testing
This standard is issued under the fixed designation D8164; 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* D2500 Test Method for Cloud Point of Petroleum Products
and Liquid Fuels
1.1 The intent of this guide is to suggest an initial configu-
D2532 Test Method for Viscosity and Viscosity Change
ration and provide guidance when establishing the appropriate
After Standing at Low Temperature of Aircraft Turbine
criteria needed for a DCTto correctly measure the temperature
Lubricants
inalaboratorytestmethodforproductswithinthescopeofthis
D2983 Test Method for Low-Temperature Viscosity of Au-
committee. This guide includes examples of the approximate
tomaticTransmission Fluids, Hydraulic Fluids, and Lubri-
digital contact thermometer (DCT) criteria that was found
cants using a Rotational Viscometer
suitable for measuring temperature in the test methods utilized
D3829 Test Method for Predicting the Borderline Pumping
by Committee D02.
Temperature of Engine Oil
1.2 The values stated in SI units are to be regarded as
D4539 Test Method for Filterability of Diesel Fuels by
standard. No other units of measurement are included in this
Low-Temperature Flow Test (LTFT)
standard.
D4684 Test Method for Determination of Yield Stress and
1.3 This standard does not purport to address all of the
Apparent Viscosity of Engine Oils at Low Temperature
safety concerns, if any, associated with its use. It is the
D5481 Test Method for Measuring Apparent Viscosity at
responsibility of the user of this standard to establish appro-
High-Temperature and High-Shear Rate by Multicell Cap-
priate safety, health, and environmental practices and deter-
illary Viscometer
mine the applicability of regulatory limitations prior to use.
D5853 Test Method for Pour Point of Crude Oils
1.4 This international standard was developed in accor-
D6371 Test Method for Cold Filter Plugging Point of Diesel
dance with internationally recognized principles on standard-
and Heating Fuels
ization established in the Decision on Principles for the
D6821 Test Method for LowTemperatureViscosity of Drive
Development of International Standards, Guides and Recom-
Line Lubricants in a Constant Shear Stress Viscometer
mendations issued by the World Trade Organization Technical
D6896 Test Method for Determination of Yield Stress and
Barriers to Trade (TBT) Committee.
Apparent Viscosity of Used Engine Oils at Low Tempera-
ture
2. Referenced Documents
D7279 Test Method for Kinematic Viscosity of Transparent
2
2.1 ASTM Standards:
and Opaque Liquids by Automated Houillon Viscometer
D97 Test Method for Pour Point of Petroleum Products
D7962 Practice for Determination of Minimum Immersion
D445 Test Method for Kinematic Viscosity of Transparent
Depth and Assessment of Temperature Sensor Measure-
and Opaque Liquids (and Calculation of Dynamic Viscos-
ment Drift
ity)
D8210 Test Method for Automatic Determination of Low-
D2162 Practice for Basic Calibration of Master Viscometers
Temperature Viscosity of Automatic Transmission Fluids,
and Viscosity Oil Standards
Hydraulic Fluids, and Lubricants Using a Rotational
D2386 Test Method for Freezing Point of Aviation Fuels
Viscometer
D8278 Specification for Digital Contact Thermometers for
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum
Test Methods Measuring Flow Properties of Fuels and
Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcom-
Lubricants
mittee D02.07 on Flow Properties.
E1 Specification for ASTM Liquid-in-Glass Thermometers
Current edition approved April 1, 2021. Published April 2021. Last previous
edition approved in 2019 as D8164 – 19. DOI: 10.1520/D8164-21.
E177 Practice for Use of the Terms Precision and Bias in
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ASTM Test Methods
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
E563 Practice for Preparation and Use of an Ice-Point Bath
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. as a Reference Temperature
*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
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...
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: D8164 − 19 D8164 − 21
Standard Guide for
Digital Contact Thermometers for Petroleum Products,
1
Liquid Fuels, and Lubricant Testing
This standard is issued under the fixed designation D8164; 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*
1.1 This guide provides examples of criteria needed to define a digital contact thermometer (DCT) suitable for measuring
temperature in the test methods utilized by Committee D02. The DCT criteria are based on the design and sensing characteristics
of the liquid-in-glass thermometers that have been used successfully in Committee D02 test methods. The DCT criteria listed in
a test method take precedence over those listed in this guide.The intent of this guide is to suggest an initial configuration and
provide guidance when establishing the appropriate criteria needed for a DCT to correctly measure the temperature in a laboratory
test method for products within the scope of this committee. This guide includes examples of the approximate digital contact
thermometer (DCT) criteria that was found suitable for measuring temperature in the test methods utilized by Committee D02.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D97 Test Method for Pour Point of Petroleum Products
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D2162 Practice for Basic Calibration of Master Viscometers and Viscosity Oil Standards
D2386 Test Method for Freezing Point of Aviation Fuels
D2500 Test Method for Cloud Point of Petroleum Products and Liquid Fuels
D2532 Test Method for Viscosity and Viscosity Change After Standing at Low Temperature of Aircraft Turbine Lubricants
D2983 Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using
a Rotational Viscometer
D3829 Test Method for Predicting the Borderline Pumping Temperature of Engine Oil
D4539 Test Method for Filterability of Diesel Fuels by Low-Temperature Flow Test (LTFT)
D4684 Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature
1
This guide is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.91 on Coordinating Subcommittee on Thermometry.
Current edition approved July 1, 2019April 1, 2021. Published August 2019April 2021. Last previous edition approved in 20182019 as D8164 – 18a.D8164 – 19. DOI:
10.1520/D8164-19.10.1520/D8164-21.
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
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D8164 − 21
D5481 Test Method for Measuring Apparent Viscosity at High-Temperature and High-Shear Rate by Multicell Capillary
Viscometer
D5853 Test Method for Pour Point of Crude Oils
D6371 Test Method for Cold Filter Plugging Point of Diesel and Heating Fuels
D6821 Test Method for Low Temperature Viscosity of Drive Line Lubricants in a Constant Shear Stress Viscometer
D6896 Test Method for Determination of Yield Stress and Apparent Viscosity of Used Engine Oils at Low Temperature
D7279 Test Method for Kinematic Viscosity of Transparen
...
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