Soil Resistivity Measurement Ρ - AEMC 6470-b User Manual

3-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: For a test voltage U
4-Pole earth resistance measurement R
Measurement
Range
Resolution
Intrinsic error
Values for R
(R + R ) / R
H S
< 3000
(R + R ) / R
H S
< 5000
Note: With a test voltage U
3.2.5 Soil Resistivity Measurement
Measuring Method: Voltage/Current measurement (EN 61557 part 5)
Open Circuit Voltage: 16 or 32Vrms square wave
Test Frequency: Selectable from 41 to 128Hz (see table in § 6.2)
Short Circuit Current: > 200mA
Noise Suppression: > 80 dB for frequencies 20% or more above or below the
test frequency
Max. Overload: 250Vrms
18
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0.09 to
9.99Ω
0.01Ω
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 for R
OUT
0.011 to
9999Ω
0.001Ω
Operating conditions: R
, R and R
H S E
≥ 0Ω, Rs ≤ 3kΩ
R
H
E
> 3kΩ, Rs ≤ 30kΩ
R
H
R > 30kΩ, Rs < 100kΩ
E
H
of 16V, halve the value of R
OUT
GlobalTestSupply
www.
E
10.0 to 100 to
99.9Ω 999Ω
0.1Ω 1Ω
± (2% + 1ct)
< 3 x R , U = 32V
H OUT
Frequency (Hz)
41 to 513
41 to 513
41 to 128
E
10.00 to 100.0 to
99.99Ω 999.9Ω
0.01Ω 0.1Ω
± (2% + 1ct)
< 3 x R , U = 32V
E H OUT
Frequency (Hz)
41 to 513
41 to 513
41 to 128
ρ
AC
Ground Resistance Tester Model 6470-B
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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E
E