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ASTM E556/E556M-11(2020)

Historical Reaffirmation

Standard Test Method for Calibrating a Wheel Force or Torque Transducer Using a Calibration Platform (User Level)

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1.1 This test method covers the calibration of the force (or torque) transducer and associated instrumentation of a mounted test wheel by using a calibration platform.

1.2 This test method is a static calibration, simulating the traction force between a tire and the pavement.

1.3 In the case of a force-measuring system, the instrumentation readout is directly proportional to the calibration force input.

1.4 In the case of a torque-measuring system, the instrumentation readout is a measure of the calibration force input and the effective tire radius.

1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

1.6 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.

1.7 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.


5.1 Wheel force or torque transducers are used under dynamic test conditions, and the measurements are subject to many error sources. The static calibration recommended by the present standard cannot eliminate all error sources. Its significance is in providing an accurate calibration of the transducer and the associated electronics, readout, and recording equipment.

5.2 Calibration result may be used to either make mechanical or electronic adjustments until the readout agrees with the calibration input. Alternatively, calibration curves or tables may be prepared to be used as corrections to measured results.

SDO ASTM: ASTM International
Document Number E556
Publication Date June 1, 2020
Language en - English
Page Count 4
Revision Level 11(2020)
Supercedes
Committee E17.21
Publish Date Document Id Type View
Jan. 1, 2011 E0556_E0556M-11 Revision
Nov. 1, 2024 E0556_E0556M-11R24 Reaffirmation
June 1, 2020 E0556_E0556M-11R20 Reaffirmation
Sept. 1, 2015 E0556_E0556M-11R15 Reaffirmation