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Exactly we doing the same way as you mentioned. 1. Connect 12.5V power supply, resistor and ammeter in series. 2. Adjust the resistor (1.785K) to achieve a current of 7 mA 3. Without adjusting any further, break the circuit and insert the set of contacts under test 4. Measure the current in...

I get your point. But our Test voltage is 12.5V constant and contacts are gold/gold or carbon/carbon.

I get you point. But our Test voltage is 12.5V constant and contacts are gold/gold or carbon/carbon.

Is there is any procedure available for wetting current measurement? The way we do is set max current(7mA), And add contact to circuit and measure. But wetting current is the minimum current needing to flow through a newly-closed mechanical switch or relay in order to break through any film...

How can I measure wetting current cross the switch contact? We set up a test circuit with 7 mA, and then integrate the switch contact with series and measure the current. Our spec is 1-7 mA. With this method we always get 6.95-6.99 mA and believe is high and the method we are doing not right...