AC voltmeter is pressure meter power switch (AC VOLTAGE) principle, use the meter of this kind. Is the same as the DC voltmeter. Is in use must be applied to measure across parallel to the load to measure the voltage. The different from DC voltmeter. Is in use the meter measure across the voltage or power supply need not consider the polarity. Because the voltage polarity switch will switch to switch all the time.AC voltmeter with all 5 area is 0 ~, ~, 2.5V 0 10V 0 ~, ~ 250V 50V 0 0 ~, and 1 000V.There are 4 scale is 0 ~, ~, 2.5 0 10 0 ~ 50 0 ~ 250 read, tick scale under the mirror.Hierarchy using AC voltmeter.1. On AC volt while measuring voltage across the parallel to the load.2. Set; use of meter in the District, ACV3. Adjustable switch; measurement set correctly. If no value is the measure of how much. To set up the highest position; measure (1 000V), first, then adjust the area down each district. Until the needle will point meter readings to simple and accurate.4. Before for water pressure, high power, should turn off the lights (OFF) circuit to measure first.5. Don't touch the tape or meter while measuring high voltage power When measuring the complete should close (OFF) switch power circuit. Office before discharge measuring measuring meter out circuit.
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