Multimeter notes: Difference between revisions
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When a hobbyist wants to know whether their wallplug is working, | |||
or whether the Vcc line is at 5V, 3.3V, or 0V, | |||
or whether the battery output s 4.8V or 3.4V or or 6.3V), | |||
then I'm not bothered if it's a few percent off. | |||
At the same time, if 7.3V could mean 7.4V or the other way around, | |||
there are quickly some tasks that become more guesswork (and that's ~1.5%), | |||
And if you're working in industry and calibrate things, this is important. | |||
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Assume that cheap multimeters are not any better than 1% on DC voltage and current. | Assume that cheap multimeters are not any better than 1% on DC voltage and current. | ||
AC voltage and current is its own topic, because | AC voltage and current is its own topic, | ||
cheaper variants ''assume'' a sinusoidal waveform in their mains measurement, and | because cheaper variants ''assume'' a sinusoidal waveform in their mains measurement, and | ||
only more expensive ones actually sample that any better. | only more expensive ones actually sample that any better. | ||
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Expensive Brand multimeters tend to be better than 1% on most functions, | Expensive Brand multimeters tend to be better than 1% on most functions, sometimes much. | ||