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An electrical meter with integral AC current clamp is known as a clamp meter, clamp-on ammeter, tong tester, or colloquially as an amp clamp. A clamp meter measures the vector sum of the currents flowing in all the conductors passing through the probe, which depends on the phase relationship of the currents. Only one conductor is normally ...
A DC ammeter is thus sensitive to which polarity it is connected in; most are marked with a positive terminal, but some have centre-zero mechanisms [a] and can display currents in either direction. A moving coil meter indicates the average (mean) of a varying current through it, [b] which is zero for AC. For this reason, moving-coil meters are ...
No automatic protection. A smaller version similar in size to small portable test meters. (Basic ranges to 1 A, DC only and 1000 V, both extendable with external multiplier and shunts [23]). 10,000 ohms/volt DC, 1000 ohms/volt AC. Clamp meter: Principally for higher currents (Ranges 300 A, 600 A, 1200 A, 150 V, 300 V & 600 V all AC only).
A clamp meter. Any meter will load the circuit under test to some extent. For example, a multimeter using a moving coil movement with full-scale deflection current of 50 microamps (μA), the highest sensitivity commonly available, must draw at least 50 μA from the circuit under test for the meter to reach the top end of its scale. This may ...
Transformer or current clamp meter, (suitable for AC current only). Fluxgate sensor , (suitable for AC or DC current). Hall effect sensor (suitable for AC, DC, or pulsating current), a type of current sensor which is based on the Hall Effect phenomenon discovered by Edwin Hall in 1879.
A multimeter with a built in clamp facility. Pushing the large button at the bottom opens the lower jaw of the clamp, allowing the clamp to be placed around a conductor (wire). Depending on sensor, some can measure both AC and DC current. RF probe; Signal tracer
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3579 S High St, Columbus, OH · Directions · (614) 409-0683