[RE-wrenches] Testing Pump Sensors

Drake drake.chamberlin at redwoodalliance.org
Wed Jul 6 06:38:17 PDT 2016


I did a test this morning. In a bowl of tap water 
(chlorinated) the reading was about 0.7 Ohms at a 
6" separation of the probes. That is a lot more 
conductive that the readings I got, and will 
quantify on the next visit. Pure water is 
considered dielectric,but also shows some 
conductivity. 
http://physics.stackexchange.com/questions/41115/why-is-water-not-used-as-a-dielectric-in-the-condenser


At 12:28 PM 7/5/2016, you wrote:

>Test resistance only on disconnected wiring, 
>measure resistant to ground either side of the 
>switching point. . The controller will likely be 
>a open collector that will measure current to 
>ground. Do nor use megger, you are not testing insulation.
>On Jul 5, 2016 10:37 AM, "Drake" 
><<mailto:drake.chamberlin at redwoodalliance.org>drake.chamberlin at redwoodalliance.org> 
>wrote:
>Is there a way to test the conductivity sensors 
>for the low water shutoff and restart on a 
>submersible well pump, from the surface? 
>Â  Could the wires be resistivity tested?
>
>What should the resistance readings be between 
>the wires? Would a megohm meter be the right 
>tool to use? Could the pump be harmed by the 
>high voltage spike in the water around it produced by the meter?
>
>Thanks,
>
>Drake
>
>Drake Chamberlin
>Athens Electric LLC
>OH License 44810
>CO License 3773
>NABCEP Certified Solar PV
><tel:740-448-7328>740-448-7328
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>
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