... Practical! 3.With continuity test! HD90A is 3 1/2 digital clamp meter with steady performance,safety and reliability, full function. The ... positions have overloading protection function, not easy to damage. AC current is measured through the clamp jaw with four positions of ... input through the test lead,and can test AC Voltage,DC Voltage,Resistance,Diode and continuity. General characteristics:1.Max ...