WEBVTT

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This time I install an ohmmeter in parallel on the ammeter

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Caliber 600 μA, we find 999 to 1000 Ohm as seen in progress!

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Caliber 6 mA: 100 ohm (in passing we know the intensity of measurement :-))

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Caliber 600 mA is found 1.6 ohm instead of 1 because of R, the resistance of the wires and fuse (negligible before the resistance of other gauges)

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Thus, measuring 10 Ohm and less requires positioning the ammeter before the voltmeter to avoid adding the 1.6 ohm parasite (see upstream / downstream montages: subscriber part)

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The caliber 20 amps opposes 0.01 ohm, not measurable here