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MEXICOWANDERER's avatar
MEXICOWANDERER
Explorer
May 30, 2016

Use Local Voltage To Sense Remore Voltage (Meter)

http://www.buyincoins.com/item/26013.html#.V0yNGeSG9_k This link takes you to an accurate digital voltmeter. One of the problems with using a remote mounted meter, is that it reports what it see's,...
Harvey51's avatar
Harvey51
Explorer
May 31, 2016
I have never seen a voltmeter that needed a 12 volt power supply. Don't they all use internal 9 volt batteries now? My UNI-T multimeter says it has a 10 Megohm input impedance on all ranges so the current drawn could not be more than I = V/R = 12/10^7 = 1.2 micro amps. Voltage loss in a 1 ohm wire would be V=IR = 1.2 * 10^-6 = 1.2 micro volts. Looks to me like it would take a 100 ohm wire to change the hundredths of volts on the reading.

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