conductivity with a multimeter

Thread Starter

Tim Ostrom

Joined Oct 26, 2008
2
Thanks for all those who responded to my question, from yesterday.

Does anybody have a schematic for this.
I have batteries and ac/dc converters but no low power ac power supplies. What would be a good value for the ac power supply and the resistor???

Thanks again,
tim ostrom
 

beenthere

Joined Apr 20, 2004
15,819
12 volts from a transformer is adequate, and the resistor may need to be adjusted for cell conductivity. That is vague, I realize, but you want a drop across the cell large enough to get an accurate reading with the voltmeter. You don't want to have 11.9 volts across the fixed resistor and only .1 across the cell, for instance.

So you might have several 1% resistors on hand - 1M, 100K, 10K, 1K should cover it.
 
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