Fluke 1630 - Page 13

Earth Ground Clamp
Using the Clamp
7
R 1
R g
R g
Equivalent circuit diagram:
Ground resistance measurements principle:
R 2 .....R n
.....R n
1630
EA
RTH GROUND CLAMP
300
V
C
A
T
m
A
A
OFF
HOLD
FUNC REC
16
30
E
A
R
TH
G
R
OUND
CLA
M
P
30
0
V
C
A
T
m
A
A
OFF
H
OLD
F
U
N
CRE
C
R g
1630
EA
RTH GR
OUND CLAMP
300
V
C
A
T
mA
A
OFF
HOLD
F
UN
C
REC
R 1 R 2 R 3
eht03f.eps
Figure 3. Ground Resistance Measurement Principles