by chemelec » Sun Aug 05, 2007 5:55 pm
[quote="my77gmc"]aside from that has anyone stuck a meter on their water cell and measured capacitance?
i have...do it urself and post ur results here, just for curiosities sake.
/quote]
OK, Here are some Very Carefully tested results on two cells.
(Plate Sizes on each are about 2.5 by 5.5 inches.)
Water Temp = 20 Degree
Water = Store bought Distilled water.
Test Instruments:
1) B&K 878, Universal LCR Meter
2) Sencore LC102, Capacitor/Inductor Analyzer.
Both Instruments are Calibrated and I have checked there accuracy with a "Factory bought, Standard Test Set of 3 capacitors".
** Cell 1: an 8 plate "series cell". With No water = 19.5 pF.
Leakage test at 100 VDC, using instrument 2 above = 0.28 uA.
Instrument 1: Capacitance with water and on 120 hz = Varies between 2.2 to 2.9 uF.
Instrument 1: Capacitance with water and on 1 khz = Varies between 39nF to 125 nF.
Instrument 2: Capacitance with water= average of 7.4 uf, varies somewhat also.
** Cell 2: a 12 plate "parallel cell". With No water = 245 pF.
Leakage test at 100 VDC, using instrument 2 above = 0.30 uA.
Instrument 1: Capacitance with water and on 120 hz = Varies between 147 to 155 uF.
Instrument 1: Capacitance with water and on 1 khz = Varies between 6.5 uF to 9 uF.
Instrument 2: Capacitance with water = Holds fairly stable at 0.844 FARADS.
Using Instrument 2 and Attempting to test thesecell with water in them:
a) Capacitor Leakage
b) Dielectric Absorption
c) Capacitor ESR.
Absolutely FAILED on All three tests.
So if it is a Capacitor, it doesn't act like any capacitor I know of.
And Strangely Enough, using "Instrument 1" to test Inductance an the Series Cell: it measure 20 mh on the 1 KHz test.
and it measure a Huge .879 Henries on the 120 Hz test.
So does this measurement make it an INDUCTOR of that value?
I THINK NOT!
Considerably Lower resuts on the Parallel cell. But enough is enough.
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