SURGE TEST(ST)
A capacitor is loaded at a pre-set voltage (between 100and500V). Said capacitor is unloaded onto each bar .The tester ,with high sampling frequency ,analyses the damped oscillation which is obtained and digitally calculates the RMS value from the oscillation (ST) of each bar .
The tester calculates the RMS value of difference in oscillation of two bars set against diametrically, too(DVE)