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Amp meters how do they work?

Updated: 8/11/2023
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14y ago

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A current probe, or current clamp, is a device having jaws which allows clamping around an electrical conductor, measuring the current without touching the conducting material. This measurements comes from a second current generated by the magnetic field created from the first electrical current.

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9y ago
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9y ago

Amp probe meters are also called current clamps and are used to measure electrical currents. To use, zero the meter by pressing the button and then set to either a 0-10 or 0-20 amp scale, clip the meter onto the wire or cable, and plug into an outlet to record the measurement.

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11y ago

An eddy-current probe works by passing an alternating current through a coil of wire and measuring the coil's impedance. This impedance changes when the probe is brought near an electrically conductive material and the impedance change is proportional to the physical gap between the coil and the conductive target. The sensing electronics in turn convert this impedance change to a voltage, providing an electrical output directly proportional to physical gap.

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14y ago

An digital amp meter really measures the voltage (E) across a known resistance (R) and reads out in amps (I). Ohms Law: I=E/R

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