18
Ground Resistance Tester Model 6471
With Current Probe MN82
Measurement Range
0.00 to
9.99mA
10.0 to
99.9mA
100 to
999mA
1.00 to
9.99A
10 to
40A
(1)
Resolution
0.01mA
0.1mA
1mA
0.01A
0.1A
Frequency range
16 to 49Hz
(1)
50 to 99Hz
(1)
100 to 400Hz
Operating error from
0.5 to 100mA
± (15% + 2cts)
± (7% + 2cts)
± (5% + 2cts)
Operating error from
0.1 to 40.0A
> 20%
± (15% + 2cts)
± (7% + 2cts)
(1): The Model 6471 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
DC
(if resistance < 22
Ω
the output voltage is reduced
to 10V
DC
)
Max output current:
> 200mA
DC
for resistances < 20
Ω
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 5
Ω
Alarm setting:
“>” or “<” from 1 to 999
Ω
(max 3 digits)
2-Pole m
Ω
measurement
Measurement
Range
0.12 to
9.99
Ω
10.0 to
99.9
Ω
100 to
999
Ω
1.00 to
9.99k
Ω
10.0 to
99.9k
Ω
Resolution
0.01
Ω
0.1
Ω
1
Ω
10
Ω
100
Ω
Intrinsic error
± (2% + 2cts)
Operating error
± (5% + 3cts)
www.
ShopAEMC
.com
Shop for AEMC products online at:
1.888.610.7664
