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Earth/Ground Tester
Specifications
45
Selective Measurement of the Earthing Resistance (R
E
)
Measuring method: Current and voltage measurement with probe as per
EN61557-5 and current measurement in the individual
branch with additional current transformer.
Open circuit voltage: 20 / 48 V ac
Short circuit current: 250 mA ac
Measuring frequency: 94, 105, 111, 128 Hz selected manually or
automatically (AFC), 55 Hz (R
*
)
Noise rejection: 120 dB (16 2/3, 50, 60, 400 Hz)
Maximum overload: maximum Urms = 250 V
Measuring
Range
Display
Range
Resolution Accuracy
[1]
Operating Error
[1]
0.020 Ω...30 kΩ
0.001...2.999 Ω 0.001 Ω
±(7 % of rdg +2 digit) ±(10% of rdg +5 digit)
3.00...29.99 Ω 0.01 Ω
30.0...299.9 Ω 0.1 Ω
0.300...2.999 kΩ 1 Ω
3.00...29.99 kΩ 10 Ω
[1] With recommended current clamps / transformers.
Additional error because of probe and
auxiliary earth typical electrode
resistance:
digits
R
RR
ETOTAL
SH
5%1025.1
)2000(
6
+××
Ω+
−
Measuring error of RH and RS:
typical of 10% of
HSETOTAL
RRR ++
Measuring time:
typical 8 seconds with a fixed frequency
30 seconds maximum with AFC and complete
cycle of all measuring frequencies
Minimal current in single branch to be
measured:
0.5 mA with transformer (1000:1)
0.1 mA with transformer (200:1)
Maximum interference current through
transformer:
3 A with a transformer (1000:1)
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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