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As can be seen on this slide, with the closure of the contacts there is a slight vertical motion, as well as a horizontal motion. This results in a scrubbing action on the contacts. This movement is occurring hundreds of times per second. Any non-uniformity on the contact surfaces, or particles, will present a different frequency pattern. If there are any slight cracks, or stress to the reed switch, the frequency patterns will also be altered.
PTM Published on: 2014-04-10
