Dc Resistance Measurements - AEMC 6472 User Manual

Digital ground resistance and soil resistivity tester
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With Current Probe MN82
Measurement Range
Resolution
Frequency range
Operating error from
0.5 to 100mA
Operating error from
0.1 to 40.0A
(1): The Model 6472 cannot detect whether a current clamp SR182 or MN82 is connected. In the case
of the MN82 clamp, with currents > 10A and frequencies < 100Hz the instrument will not display any
warning messages. It is the operator's responsibility to observe the limits of use when using the MN82
clamp.
3.2.4

DC Resistance Measurements

Measuring Method: Voltage/Current measurement (Standard EN 61557 part 4)
Nominal Output Voltage: 16V
reduced to 10V
DC
Max Output Current: > 200mA
Max Overload (permanent): 50Vrms (protection up to 250V is guaranteed)
Max Inductive Load: 2 H
Max Interfering Voltage: 60Vpeak > 10Hz
Time for Auto Range Selecting: approx 5 s
Measuring Time: 8 s with automatic polarity inversion
Measuring Rate: 3 per s in manual mode
Lead Compensation: Possible from 0 to 5Ω
Alarm Setting: ">" or "<" from 1 to 999Ω (max 3 digits)
2-Pole mΩ measurement
Measurement
Range
Resolution
Intrinsic error
Operating error
Ground Resistance Tester Model 6472
0.00 to
9.99mA
0.01mA
16 to 49Hz
(1)
± (15% + 2cts)
> 20%
(if resistance < 22Ω the output voltage is
DC
)
DC
0.12 to
10.0 to
9.99Ω
99.9Ω
0.01Ω
0.1Ω
10.0 to
100 to
99.9mA
999mA
0.1mA
1mA
50 to 99Hz
± (7% + 2cts)
± (15% + 2cts)
for resistances < 20Ω
100 to
999Ω
± (2% + 2cts)
± (5% + 3cts)
1.00 to
9.99A
0.01A
100 to 400Hz
(1)
± (5% + 2cts)
± (7% + 2cts)
1.00 to
9.99kΩ
99.9kΩ
10Ω
10 to
40A
(1)
0.1A
10.0 to
100Ω
17

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