Anyang Ouhan Trade Co.,ltd,http://www.ohtradestar.com/.which is located in the center of China, Henan Province, is specializing in export many kinds of power meters, energy meters, analog panel meters, such as led multi-function digital meter, lcd multi-function programmable electric energy meter, three phase ampere meter and voltage meter, single phase digital meter and shunt resistor etc.
The voltmeter, used to measure the voltage in the circuit, the voltmeter also has three terminals, one negative terminal and two positive terminals. The student's voltmeter generally has 3V and 15V terminals. When measuring the range according to the voltage, the range is “15V”. Each large grid on the dial indicates 5V, and each small grid indicates 0.5V (ie, the minimum score). The degree value is 0.5V); when the range is "3V", each large cell on the dial represents LV, and each small cell represents 0.lV (ie, the minimum division value is 0.lV).
The voltmeter should be used in parallel in the circuit, and which electrical appliance is connected in parallel, which voltage is measured at the voltage across the electrical device; unlike the ammeter, the voltmeter can be directly connected to the two poles of the power supply without any electrical appliances. Is the power supply voltage.