Search found 3 matches

by andywileman
Tue Mar 18, 2014 4:39 pm
Forum: USB PC Oscilloscopes
Topic: Measuring Contact Resistance
Replies: 5
Views: 9178

Re: Measuring Contact Resistance

Hi Martin, I've had a reconfigure of the circuit, I found this article on the web. http://www.edn.com/electronics-news/4381540/Evaluate-Relays-for-Automated-Test-Stations I've attached the results below (2014318.0001), you can see the measurement across the contacts approx 900mV and the contact resi...
by andywileman
Mon Mar 17, 2014 10:02 pm
Forum: USB PC Oscilloscopes
Topic: Measuring Contact Resistance
Replies: 5
Views: 9178

Re: Measuring Contact Resistance

Hi Martin, This is the circuit I'm using, it's the standard test manufacturers use. http://www.pidtechinsights.com/2012/02/21/how-to-measure-the-contact-resistance-of-relays/ All I'm seeing at present is around 800mV across the contacts, where the contact resistance should be in the order of 50mV (m...
by andywileman
Thu Mar 13, 2014 9:10 pm
Forum: USB PC Oscilloscopes
Topic: Measuring Contact Resistance
Replies: 5
Views: 9178

Measuring Contact Resistance

Hi, I'm trying to measure contact resistance across the contacts of a relay switching 6V through 6 Ohm load at a 1Hz frequency for reliability testing. I'm trying just to get the contact resistance which should be around 50 mV at 1 amp, but at the moment I'm getting a square wave of around 800mV. Is...