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→13.3.5 Testing Technology
===13.3.5 Testing Technology===
The test set-ups for relay tests consist of a load part, which allows the selection of specific electrical loads, and a control / monitoring part, which typically includes the measuring devices with data collection and mostly also a computer for data analysis ''<xr id="fig:Principle and sequence of testing with electronic load simulation"/> (Fig. 13.8)''. Variations for testing of different relay types concern mostly the load circuits, the sample size of test specimens, and the frequency of testing.
*Signal Relays (Low Current Relays)
The DC load conditions are specified in the relevant standards (for ex. Telecom Specifications).
<figure id="fig:Principle and sequence of testing with electronic load simulation">Fig[[File:Principle and sequence of testing with electronic load simulation. 13.8:jpg|right|thumb|Principle andsequence of testingwith electronic loadsimulation]]simulation</figure>
*Switching of “dry circuits” with monitoring of the contact resistance, in some cases at elevated temperatures
