Thread: Multimeter Ohms
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Dave Martindale Dave Martindale is offline
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Default Multimeter Ohms

Peetie Dot Wheatstraw at Gmail Dot Com writes:

Measuring a 470 ohm resistor on my $4 digital multi-meter with the
following scales shows:

...
2000 shows 487


Thats accurate to within 5% -and- properly scaled.


They are *both* properly scaled. His meter calls that range "2000
ohms", and displays the result properly as ohms. Your meter calls that
range "2 kohms", and displays the result properly as kohms.

The only "problem" is you failing to apply the scale factor implied by
the knob setting to the displayed result.

But even if the knob was marked incorrectly (e.g. the scale is labelled
2000 but the display decimal is placed so the largest reading is 1.999),
you really ought to be able to figure out how to scale the result
yourself. You know what the largest reading is; everything else is
proportional. You don't even need the decimal point; it's just a
convenience.

Dave