Can clamp meters measure DC current using the clamp(as round a car battery lead)? If so, how do they work? Surely they need a varying current, as in AC?
- posted
15 years ago
Clamp metesr and DC current
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- posted
15 years ago
On Thu, 19 Mar 2009 06:51:39 +1100, "MoiInAust" put finger to keyboard and composed:
Compact 0-80A Automotive Ammeter:
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- Franc Zabkar
-- Please remove one \'i\' from my address when replying by email.
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- posted
15 years ago
Ones that are designed for DC can, yes.
They use "hall effect" sensors that work with DC.
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Dave.
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- posted
15 years ago
IIRC, before the advent of solid state electronics, they consisted of a pivoted permanent magnet which aligned itself with the magnetic field around the cable. This was spring loaded and was linked to the pointer. A cable groove was included in the rear of the meter, which was placed in contact with the cable insulation to take a reading.
-- Regards, Chas. (To email me, replace "xxx" with letters tango papa golf.)
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- posted
15 years ago
They use a 'Hall effect' sensor built into the clamp. Can do AC and DC. Bought one of these last year ... (beware of line break)
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ewItem Really weird to be able to clip on and see the direction of charging current into a battery, or how much current some circuitry is taking.
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- posted
15 years ago
Good looking product meter fluctuates to much and is unstable. Uses Hall Effect sensor
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