7400 Series High Withstand Voltage Tester has Exclusive Smart GFI Circuit (Pat.#169000), line and load regulation maintains the output voltage within 1% of setting,
The main application field they are used in Motor and Generator,Spark plugs, Capacitors, Connectors, Aviation components, Transformers, Medicals, Wire and Cables ,Coils and Chokes, Switches and Relays.