Darter Technologies

What you know about DMMs and clamp meters can make a big difference to your bottom line How well you equip yourself to do your work plays a big role in your success. When it comes to electrical test equipment, are you sure you have the right tools for the job?

Digital Multimeter Vs Clamp Meters

We often think of a digital multimeter (DMM) as a direct contact instrument and a clamp meter as an inductive instrument. This leads to the erroneous conclusion that the only real difference is the input method.
However, a clamp meter is not a DMM with a set of inductive jaws replacing the test leads. They are two distinctly different instruments, each with its own advantages.
A DMM is essentially a voltage measuring tool with some current abilities, while a clamp meter is essentially a current-measuring tool with some voltage abilities. The DMM allows you to do electronic work because of its high resolution—it measures in milliunits (for example, millivolts, milliamps and milliohms).
It also allows you to do electrical measurements, except for current. (You can do electrical current measurements with a DMM if you use a current clamp accessory.)
The clamp meter measures to the nearest tenth of a unit, rather than in the milli-units you find in a DMM. In electronic work this is rarely sufficient resolution, but in electrical work it’s perfect. Measuring situations In the past, using test leads rather than a clamp usually made it easier to measure voltage on the load side of a breaker—and it’s obvious you need leads to measure voltage at a wall receptacle. Many clamp meters had test lead jacks,

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