The most common measuring and testing instruments are voltage testers, voltmeter, ammeter, ohmmeters, continuity testers, megohmmeters, wattmeters, and watt-hour meters.

• 最常用的测量和检验仪器有电压测试仪，电压表，电流表，欧姆表，短路测试仪，兆欧表，功率表和电度表。