Test No. 104 - "Electrolytic Capacitor EL-7"
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Output Variations at 30oC
June 6 - 13, 1977
Stewart Ct. Laboratory
Sunnyvale, CA 94086
Copyrighted © by The Townsend Brown family. All rights reserved.
PURPOSE:
To observe fluctuations in self-potential output of electrolytic
capacitor EL-7 at constant temperature 30
oC. Capacitor loaded
with 50 K.
PROCEDURE:
The capacitor (by its construction) is hermetically sealed (against humidity
and barometric pressure changes) and the can (grounded) is almost completely
immersed in 50% ethylene glycol solution at 30
oC +/-
.1
oC in constant-temperature bath (also grounded).
Potential reduced to the range (0-10 mV) of Houston recorder No.
2 by loading with 50 K. Circuit is as follows:
RESULTS:
As shown on chart (Fig. 1), there appears to be no definite
diurnal periodicity in the self-potential of EL-7 during this period of
time.
Considering that the capacitor is shunted by a 50 K load, the
potential developed is surprising.
The polarity reversed from positive to negative in this
capacitor early in June and remained negative throughout this test.
Graphic -
Figure 1
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