Multimeters

A common piece of test equipment is the multimeter in electronics lab, in which different types of meters are combined into a single unit. The volt-ohm-milliammeter  is used very often. As its name implies, it is the combniation of voltage, resistance and current measuring capabilities.

You should not have much difficulty envisioning how a single milliammeter can be used for measuring the current, voltage, and resistance. The preceding discussions for the measurements of these quantities have all the included methods in which the current meter can be used to measure intended quantity.

Multimeters have certain limits in values which they can measure. The maximum voltage is of nearly 1000 V; larger voltages need special leads and strong insulated wires and other safety precautions. The maximum current

which a common VOM can measure is around 1 A. The maximum resistance is on the order of many megohms or tens of megohms. The lower limit of resistance indication is an ohm.