AEMC 6471 - Limited Warranty; Warranty Repairs

82 Ground Resistance Tester Model 6471
installation)
R
S
: resistance of the stake connected to terminal S
R
SEL
: selective earth resistance (measurement of the current with a
clamp)
R
S-ES
(2)
: resistance between stakes S and ES (used for resistivity
measurement)
R
∆0
: measuring lead compensation resistance
S : S (Y) terminal (reference potential socket for calculating earth
resistance)
U-Act
(1)
: external voltage currently present on the instrument terminals
U
H-E
: voltage measured between terminals H and E
U
OUT
: voltage generated by the instrument between terminals H and
E (32V or 16V)
U
S-E
: voltage measured between terminals S and E
U
S-ES
: voltage measured between terminals S and ES
U
SR
: frequency chosen by the user
U
SrEL
: voltage of terminal S (compared with E) expressed as a
relative value (rEL); value without unit
V pot. : ground potential measurement
ρ
S
: ground resistivity measured according to the Schlumberger
method (expressed as Ω.m)
ρ
W
: ground resistivity measured according to the Wenner method
(expressed as Ω.m)
(1) The sufx Act becomes In (for "Input" in English) when this value is recorded by the instru-
ment and then read, to make a distinction between the current and recorded values. In both
cases, this value on the display is associated with its frequency.
(2) In this case, the resistances of the 4 stakes used for measurement are indicated by R
P-H
, R
P-S
,
R
P-ES
, R
P-E
.
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