An ingenious method of measuring the subject resistance in a
situation like this involves the use of both an ammeter and a
voltmeter. We know from Ohm's Law that resistance is equal to
voltage divided by current (R = E/I). Thus, we should be able to
determine the resistance of the subject component if we measure
the current going through it and the voltage dropped across it:
Current is the same at all points in the circuit, because it is a series
loop. Because we're only measuring voltage dropped across the
subject resistance (and not the wires' resistances), though, the
calculated resistance is indicative of the subject
component's resistance (R
subject
) alone.
III. FEATURES
Low resistance range: 0~40Ω
Display: Large LCD with bar graph display
Maximum output current : 200mA (400mΩ)
Sampling Rate: 2 times per second.
relative measurement
Over Range Indicator: OL of highest digit is displayed.
Low Battery Indication: The is displayed when the
battery Voltage drop below the operating voltage.
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