Megger DET5/4D - Specification

Earth Resistance Ranges: 0,01 Ω to 19,99 Ω
0,1 Ω to 199,9 Ω
1 Ω to 1,999 kΩ
10 Ω to 19,99 kΩ
Accuracy (23°C ±2°C): ±7.5% ±3 digits (±10% at >0.5 ohms and ±0.05 ohm at <0.5 ohms for
KEMA K85B requirements.
Total service error: ±7.5% ±3 digits (±10% at >0.5 ohms and ±0.05 ohm at <0.5 ohms for
KEMA K85B requirements.
Compliance with Standards: BS 7430 (1992) BS7671 (1992) NFC 15 -100
VDE 0413 Part 7 (1982) IEC364
Test Frequency: 128 Hz ±0,5 Hz
Test Current: 20 Ω range 10 mA a.c. r.m.s.
200 Ω range 1 mA a.c. r.m.s.
2 kΩ and 20 kΩ ranges 100 µA a.c. r.m.s
Test current (= short circuit current) is constant throughout a range.
Interference: Interference voltages of 40 V pk to pk at 50 Hz, 60 Hz, 200 Hz or 16
2
⁄3 Hz
in the Potential circuit will have a max. effect of typically ±1% on the
reading obtained for the 20 Ω to 2 kΩ ranges. If the ‘
Noise’ indicator is not
showing, the maximum error due to ‘noise’ voltage on these ranges will
not exceed 2%. In the 20 kΩ range this is reduced to 32 V pk to pk.
Max. Current Loop Resistance: The loop resistance that will introduce an additional 1% error is:
20 Ω range 4 kΩ
200 Ω range 40 kΩ
2 kΩ and 20 kΩ ranges 400 kΩ
SPECIFICATION
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