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3-Pole earth resistance measurement R
Measurement
Range
Resolution
Intrinsic error
Operating conditions: R
Values for R
R
(R
+ R
) / R
H
S
E
< 3000
R
H
(R
+ R
) / R
R
H
S
E
< 5000
H
Note: For a test voltage U
4-Pole earth resistance measurement R
Measurement
Range
Resolution
Intrinsic error
Operating conditions: R
Values for R
(R
+ R
) / R
H
S
E
< 3000
(R
+ R
) / R
H
S
E
< 5000
Note: With a test voltage U
Selective 4-Pole earth resistance measurement with SR182 or MN82 clamp
Same characteristics as 4-Pole earth measurements with the following particular
conditions:
Minimum current:
Maximum R
/R
SEL
E
20
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0.09 to
10.0 to
9.99Ω
99.9Ω
0.01Ω
0.1Ω
< 3 x R
E
, R
and R
H
S
E
≥ 0Ω, Rs ≤ 3kΩ
H
> 3kΩ, Rs ≤ 30kΩ
> 30kΩ, Rs < 100kΩ
of 16V, halve the value for R
OUT
0.01 to
10.00 to
9,999Ω
99.99Ω
0.001Ω
0.01Ω
< 3 x R
E
, R
and R
H
S
E
≥ 0Ω, Rs ≤ 3kΩ
R
H
> 3kΩ, Rs ≤ 30kΩ
R
H
R
> 30kΩ, Rs < 100kΩ
H
of 16V, halve the value of R
OUT
SR182, I
>0.5mA
ES
MN82, I
>2mA
ES
ratio: SR182, (R
SEL
MN82, (R
SEL
with R
+ R
H
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www.
E
100 to
999Ω
1Ω
± (2% + 1ct)
, U
= 32V
H
OUT
Frequency (Hz)
41 to 513
41 to 513
41 to 128
E
100.0 to
999.9Ω
0.1Ω
± (2% + 1ct)
, U
= 32V
H
OUT
Frequency (Hz)
41 to 513
41 to 513
41 to 128
/R
) <500
E
/R
) <120
E
<20Ω
E
Ground Resistance Tester Model 6471
1.00 to
10.0 to
9.99kΩ
99.9kΩ
10Ω
100Ω
Operating error for R
± (3% + 2cts)
± (10% + 2cts)
± (10% + 3cts)
.
H
1.000 to
10.00 to
9.999kΩ
99.99kΩ
1Ω
10Ω
Operating error for R
± (3% + 2cts)
± (10% + 2cts)
± (10% + 3cts)
.
H
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1.888.610.7664
E
E
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