... Tester 1,Small volume, light weight, easily to operate. 2,Unlike DC test, 0.1HZ Digital ... Very-low-Frequency High Voltage TesterThe new generation of AC withstand tester, replacing harmonic withstand tester, ... during the testing.Features of function1. Adopting digital convention technology and microcomputers controlling system make ... 3925+4512A 0.1HZ Digital Very-low-Frequency High Voltage Tester