Hi Ya'all; There has been made a request as to how to measure conductivity. To have a meaning full measurement a certain amount of instrumentation is required.
First the don'ts; 1.) Do not use a multimeter as the DC voltage from the ohms scale will cause continuously changing reading. Its trying to do an electroplating operation. Or if you are using your silver wires it will try to make a silver colloid. To use DC one must swish the probe rapidly to disrupt the plating operation. 2.) Don't use a casual spacing. The definition of conductivity requires a probe with a one cubic centimeter cavity. DO; 1.) Use a digital meter that has an AC current scale. 2.) Make a 10 volt AC power supply using two back to back 10 volt zeners and a 500 ohm series potentiometer. Use the wiper on the pot and the other end of the "b to b" zeners and adjust for 10 vac. 3.) Place the DMM in the current mode in series with one lead of your one cubic centimeter probe. (1 x 1 x 1 CM). 4.) The reading of the DMM will be as follows; assume a current reading of 0.32 then the conductivity is 32 uS. Any deviation for a one centimeter cube will alter the value of the conductivity. You can find this in chapter 27 of "Instrumental Methods of Ana;ysis" by Willard, Merritt, and Dean, Fourth edition. 1965. "Ole Bob"
