A multimeter is an instrument designed to measure electric current, voltage, and resistance, over several ranges of value. A multimeter is also a combination of a multirange DC voltmeter, multirange AC voltmeter, multirange ammeter, and multirange ohmmeter. Although its common uses are to measure current, voltage, and resistance, it can also measure capacitance, conductance, decibels, duty cycle, frequency, inductance, and temperature. Common multimeters have an analogue meter and digital multimeter. Pointer type multi-purpose table is a header for core components of multi-function measurement instruments, measured values by headers pointer instructions read. Digital multimeters measurements by LCD screen directly in digital form display, read the convenient, some still contain voice prompt functions. Multimeters are public a header, set the voltmeter, ammeter and the ohmic table in one of the instrument. Multimeter dc current format is multi-range dc voltmeter. Headers to parallel closed-circuit type dividing resistor can enlarge its voltage range.
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