Troubleshooting Relays and

1-5 Multirange, one-scale voltmeter.

One reason that analog voltmeters have multiple ranges is that readings are more accurate on the upper half of the scale. Thus, if they only had a single 0- to 600-V range, lower voltages would be harder to read accurately.

Voltmeter Applications

Voltmeters are used for troubleshooting circuits, circuit tracing, and measuring low resistance. For example, a common cause of electrical problems is low voltage at the supply terminals of equipment; this usually occurs for one or more of the following reasons:

● Undersized conductors ● Overloaded circuits ● Transformer taps set too low

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