Instrumentation for Measuring Dry-Circuit Contact Resistance

• DOI: 10.1109/tphp.1975.1135055
• Publication Date: 2004-04-30T20:46:25Z
• Authors: L. Jedynak; C. Kopper
• Keywords: Instrumentation; SIGNAL (programming language); Contact resistance; Electrical contacts

An automated contact resistance measurement and recording system was designed constructed for evaluating the dry-circuit performance of electrical contacts. To assure conditions voltage across contacts limited to less than 30 millivolts regardless resistance. The signal used measure a dc biased 400 Hertz sinusoid. basic repetitive sequence operation consisted mechanically cycling switch, then measuring as falling within one an adjustable set five contiguous ranges.