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Old 06-01-2009, 09:43 PM   #15 (permalink)
wstar
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Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3594
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Apparently my DMM must be too slow to see the cranking amps through the clamp. It does work for DC, I could see the amps moving around in a reasonable range as I turned headlights on/off, etc. But I tried to measure engine start 3 times, and the highest it ever briefly flicked to was 18A, which is way too low. The meter simply lacks the responsiveness.
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