They consist of a dial and display and are either auto- or manual-ranging. Also measures AC & DC voltage, resistance.Also measures voltage, resistance, continuity, capacitance, frequency.You can get past this if you have one that allows for a plug-in accessory, such as many of the Flukes do. They also only usually test to 10A – or up to 20A in short bursts – before fuses start to blow. This is both time-consuming and potentially dangerous. Multimeters that can test current do so ‘in series’ within the circuit, such that you need to break it to allow current to flow directly through the meter. What They Look Like Clamp MeterĪrchitecturally, clamp meters are just that non-contact test tools that clamp around a cable to determine amperage inductively. But with many electrical tasks, the former will be fine. With an amp clamp, you might get down to the hundredths of a unit, or tenths, as opposed to thousandths and millionths. If you’re into electronics, having a DMM is a no-brainer, since the higher resolution/accuracy in a good one allows you to see minute changes at the milliohms, millivolts and even micro-amps level. However, an amp clamp multimeter somewhat thwarts this generalization in that they may also come with pretty good accuracy specs on voltage and resistance. The main clamp meter vs multimeter difference is that they can measure high current, while multimeters have higher accuracy and better resolution.
Nowadays, some clamps also include the measuring abilities of basic multimeters, and, likewise, some test meters allow for the attachment of an amp clamp (such as the Fluke iflex). A clamp meter is primarily built for measuring current (or amperage), while a multimeter typically measures voltage, resistance, continuity, and sometimes low current.
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