Terms And Abreviations - Chauvin Arnoux C.A 6470 Manual De Instrucciones

7 TERMS AND ABREVIATIONS

mΩ Ω Ω Ω
: Low resistance / continuity measurement
3 poles : Earth measurement with 2 auxiliary rods
ρ ρ ρ ρ : Ground resistivity per Schlumberger method – expressed in Ω.m
s
ρ ρ ρ ρ : Ground resistivity per Wenner method – expressed in Ω.m
W
d, A : Distances to be programmed to calculate resistivity and according to
method
H : H terminal
S : S terminal
ES : ES terminal
E : H terminal
EARTH : Earth measurement
EARTH COUPLING : Earth coupling measurement
Usr : Frequency selected by user
U Voltage generated by device across terminals H and E (16V or 32V)
OUT
U : Voltage measured or generated across H and E terminals
H-E
U : Voltage measured across S and E terminals
S-E
U : Voltage measured across S and ES terminals
S-ES
U « NOISE » and : Spurious voltage measured across H and E terminals and its frequency
H-E
f
U « NOISE » and : Spurious voltage measured across S and E terminals and its frequency
S-E
f
R+ : Resistance measured with positive polarity current
R- : Resistance measured with negative polarity current
R : Mean resistance of R+ and R-
f : Measurement frequency
mesure
R∆ ∆ ∆ ∆ 0
: Cord compensation resistance
I : Measurement current across H and E terminals
H-E
R : Resistance of rod E
E
R : Resistance of rod H
H
R : Resistance of rod S
S
R Resistance of rod ES
SES
R : Resistance across rods S and ES (used for resistivity calculation)
S-ES
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