Quote:
Originally Posted by Lucien Nunes
Ah, now I understand your '2-3V' readings etc. A multimeter is only accurate to a certain percentage of the maximum value it can display on a particular range, plus or minus a few counts. If you were trying to measure the heater voltage using the 750V AC range on the clamp meter, even if it saw exactly 4V it might legitimately display anything from maybe 2V to 6V which is not precise enough here. That range would be fine for measuring 230V as an indication between 228 and 232 volts would be plenty accurate for most purposes. You must always choose a range that corresponds to the voltage you want to measure, to achieve proper accuracy. In this case the 'electrician's' type of meter didn't have the range you needed.
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Yes, I was pushing it accuracy wise with my old meter - but why did it record an erroneous VAC reading from anode to chassis? This was around 300V so well within range...