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ASTM D2983-04a

Historical Revision

Standard Test Method for Low-Temperature Viscosity of Automatic Transmission Fluids, Hydraulic Fluids, and Lubricants using a Rotational Viscometer

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1.1 This test method covers the use of the Brookfield viscometer and a low-temperature bath for the determination of the low-shear-rate viscosity of lubricants. The test may operate in the viscosity range of 500 to 1 000 000 mPas (cP). The bath-controlled temperature is selected within the range of +5 to -40°C.

1.2 The test method uses the SI unit, milliPascal-second (mPas), as the unit of viscosity. (1 cP = 1 mPas).

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 and health practices and determine the applicability of regulatory limitations prior to use.


The low-temperature, low-shear-rate viscosity of gear oils, automatic transmission fluids, torque and tractor fluids, and industrial and automotive hydraulic oils, Annex A4, are of considerable importance to the proper operation of many mechanical devices. Measurement of the viscometric properties of these oils and fluids are often used to specify their acceptability. This test method is used in a number of specifications.

This test method describes how to measure apparent viscosity directly without the errors associated with either interpolation or extrapolation of experimental data.

Note 1—Viscosity values obtained by either interpolation or extrapolation are subject to errors caused by gelation or non-Newtonian response to rotor speed, or both. Only in the case of known Newtonian oils is interpolation acceptable for the purpose of calibrating the rotor and glass cell. If such viscosity versus temperature plots are required, they can be made by the procedure outlined in Annex A1.


Note—Adapted from drawings of Brookfield Engineering Laboratories.

FIG. 1 Diagram of No. 4 LV Cylindrical Spindle

SDO ASTM: ASTM International
Document Number D2983
Publication Date May 1, 2004
Language en - English
Page Count 11
Revision Level 04a
Supercedes
Committee D02.07
Publish Date Document Id Type View
Nov. 1, 2023 D2983-23 Revision
July 1, 2022 D2983-22 Revision
Nov. 1, 2021 D2983-21 Revision
Nov. 1, 2020 D2983-20 Revision
June 15, 2019 D2983-19E01 Revision
June 15, 2019 D2983-19 Revision
May 1, 2017 D2983-17 Revision
Dec. 15, 2016 D2983-16 Revision
Oct. 15, 2015 D2983-15 Revision
Aug. 1, 2009 D2983-09 Revision
May 1, 2004 D2983-04A Revision
Feb. 1, 2004 D2983-04 Revision
Aug. 10, 2003 D2983-03 Revision
Nov. 10, 2002 D2983-02B Revision
Aug. 10, 2002 D2983-02A Revision
May 10, 2002 D2983-02 Revision
Aug. 10, 2001 D2983-01 Revision
Aug. 10, 2001 D2983-87R93 Reaffirmation