Amperometer and Voltameter Range: 0.01S~10S Accuracy:+/-0.03S (50Hz) Power Supply: Amperometer and Voltameter1.Model:4012.Measuring the contact time of any mechanism contact point, and the motion time of various relay,switch, connectors. Added some additional device, converting the tested signal to on-off signal, it can used to measure various time parameters and anti-electromagnetism interfere.3 ...