FIELD: instrumentation.
SUBSTANCE: claimed process comprises the steps that follow. A measuring plate is placed nearby the earth but with the electrochemical separation of the said plate and the earth with the help of a barrier. Note here that the said measuring plate has the online capacitive coupling with the ground. The earth electric potential is measured with the help of this plate. The first signal is fed which represents the potential measured by this plate to the amplifier with at least one stage. The measured potential is compared to the reference voltage.
EFFECT: measurement without electrochemical processes.
57 cl, 1 tbl, 12 dwg
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