Tool Connection and Processing
Basic electrical tools can be used to measure either volts, amps, ohms or. The difference in EC external device connection. The scale and the use of tools vary according to the wiring inside the device. Every tool needs only a very few electrons to enable pointer mechanism.
Voltmeter has high internal resistance. Ammeter is designed to bypass (shunt around) most of the EC outside the current tool. In ohmmeter allows only a few electrons in the chain.
Mechanisms for each type of meter vary widely. These tools must be delicate enough to read accurately. Therefore, they should not be discarded. They should not be used above their maximum reading, or carelessly handled or stored.
Voltmeter connected in parallel with the chain. A high value resistor in the tool coil circuit will most 0.000005, or 5 of the MCA, a leak in a moving coil by coil springs.
Be careful! 120 V, the voltmeter is used to measure 240V circuit spoil meter. (Double milliam-Perez will flow through the meter.)
Low resistance shunt is placed on the terminals of the ammeter. The device is placed in series with the circuit when the current is measured. Voltmeter connected in parallel with the circuit while a known voltage. (Source voltage is usually low battery voltage inside the meter.)
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Industrial