Test contact resistance of dry circuit contacts

Details Test contact resistance of dry circuit contacts Test contact resistance of dry circuit contacts

G - Physics

01

R

324/21

G01R 31/02 (2006.01) G01R 27/14 (2006.01) G01R 27/20 (2006.01)

Patent

CA 1213324

TEST CONTACT RESISTANCE OF DRY CIRCUIT CONTACTS Abstract of the Disclosure In the testing of dry circuit contacts, a constant current source is applied to the contacts. The open circuit voltage of the source is set to a predetermined maximum value and then the short circuit current at the contacts measured. If the current value is below a predetermined maximum value, the voltage of the source is increased to bring the short-circuit current to the predetermined value. The voltage drop across the contacts is then measured and the contact resistance calculated. This arrangement makes adjustments to take into account variations in the test circuit, such as different lead lengths and other variables, without subjecting the contacts at any time to an open circuit voltage or short circuit current above maximum values. - i -

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