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ASTM B667-97(2014)

Historical Reaffirmation

Standard Practice for Construction and Use of a Probe for Measuring Electrical Contact Resistance

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1.1 This practice describes equipment and techniques for measuring electrical contact resistance with a probe and the presentation of results.

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 become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.


4.1 Electrical contact resistance is an important characteristic of the contact in certain components, such as connectors, switches, slip rings, and relays. Ordinarily, contact resistance is required to be low and stable for proper functioning of many devices or apparatus in which the component is used. It is more convenient to determine contact resistance with a probe than to incorporate the contact material into an actual component for the purpose of measurement. However, if the probe contact material is different from that employed in the component, the results obtained may not be applicable to the device.

4.2 Information on contact resistance is useful in materials development, in failure analysis studies, in the manufacturing and quality control of contact devices, and in research.

4.3 Contact resistance is not a unique single-valued property of a material. It is affected by the mechanical conditions of the contact, the geometry and roughness of contacting surfaces, surface cleanliness, and contact history, as well as by the material properties of hardness and conductivity of both contacting members. An objective of this practice is to define and control many of the known variables in such a way that valid comparisons of the contact properties of materials can be made.

4.4 In some techniques for measuring contact resistance it is not possible to eliminate bulk resistance, that is, the resistance of the metal pieces comprising the contact and the resistance of the wires and connections used to introduce the test current into the samples. In these cases, the measurement is actually of an overall resistance, which is often confused with contact resistance.

SDO ASTM: ASTM International
Document Number B667
Publication Date Oct. 1, 2014
Language en - English
Page Count 5
Revision Level 97(2014)
Supercedes
Committee B02.11
Publish Date Document Id Type View
Dec. 10, 1997 B0667-97 Revision
Nov. 1, 2024 B0667-97R24 Reaffirmation
Nov. 1, 2019 B0667-97R19 Reaffirmation
Oct. 1, 2014 B0667-97R14 Reaffirmation
April 15, 2009 B0667-97R09 Reaffirmation
Nov. 1, 2003 B0667-97R03E01 Reaffirmation