AEMC 6471 - AC Earth;Ground Resistance Measurements

Ground Resistance Tester Model 6471 17
External Voltage Measurements
MeasuringMethod:Digital by sampling at 4028Hz, low pass lter, FFT.
The frequency of the strongest spectral component is displayed.
MeasuringRate: Display updates approx. 3 times per s.
SignalConversion:TRMS or sum of all harmonics 10 to 450Hz during selective
earth measurements with a clamp.
Measured Range 0.00 to 9.99V 10 to 65V
Resolution 0.01V 0.1V
Intrinsic error ± (2% + 1ct)
Operating error ± (5% + 1ct)
Input impedance Z
H-E
, Z
S-E
(Z
S-ES
) 1.2MΩ
Operating frequency DC and 15 to 440Hz
3.2.3 Current Measurements
External Current Measurements
MeasuringMethod:Digital by sampling at 4028Hz, low pass lter, FFT.
MeasuringRate: Display updates approx. 3 times per s.
SignalConversion:Sum of all harmonics 10 to 450Hz
With Current Probe SR182
Measurement Range
0.00 to
9.99mA
10.0 to
99.9mA
100 to
999mA
1.00 to
9.99A
10 to
40A
Resolution 0.01mA 0.1mA 1mA 0.01A 0.1A
Frequency range 16 to 49Hz 50 to 99Hz 100 to 400Hz
Operating error from
0.5 to 100mA
± (10% + 2cts) ± (5% + 2cts) ± (3% + 2cts)
Operating error from
0.1 to 40.0A
> 20% ± (10% + 2cts) ± (5% + 2cts)
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