Procedure for Conducting Contact Resistance (Millivolt Drop) Tests on an Connectors
Abstract
Two problems dealing with AN electrical connectors were investigated in accordance with Project Directive TED No. NRL 31E83. These were: (1) determination of the most suitable method of measuring millivolt drop across the contacts, and (2) to establish whether the values of millivolt drop now stated in Specification AN-W-C-591b, reference (a) should be changed. The following methods of measuring millivolt drop were investigated: (a) by holding the contacts in parallel V's or on knife edges, (b) by the use of sharp pointed probes built in the form of dividers, and (c) by means of pigtail leads soldered to the contact terminals together with the main conductor cable. As a result of tests described herein and based on experience of previous qualifying tests, the conclusion has been reached that when measuring millivolt drop in qualifying laboratory tests where the contact necessarily assembled in the connector, pigtails should be used. However, if millivolt drop is to be measured at the place of manufacture where the contact is unassembled, then the most suitable method is the use of paralleled knife-edged V's.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 25, 1946
- Accession Number
- AD1199209
Entities
People
- J. C. Staples
- Lloyd J. Money
Organizations
- United States Naval Research Laboratory