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Method
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Additional info
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Measurement range
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Uncertainty
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Earth resistance 2, 3, 4 -pole
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Open-terminal test voltage 20 or 40 VAC
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Short-circuit test current > 220 mA
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Test frequency
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55 Hz…329 Hz
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0.010 Ω … 19.99 kΩ
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±(3 % of reading + 3 digits)
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659 Hz … 2.63 kHz
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0.00 Ω … 1.999 kΩ
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±(5 % of reading + 3 digits)
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3.29 kHz … 15 kHz
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0.00 Ω … 199.9 Ω
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±(8 % of reading + 3 digits)
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Selective earth resistance with iron clamp
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Open-terminal test voltage 40 VAC
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Short-circuit test current > 220 mA
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Test frequency
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55 Hz … 329 Hz
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0.010 Ω … 19.99 kΩ
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±(8 % of reading + 3 digits)
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659 Hz … 1.50 kHz
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0.00 Ω … 1.999 kΩ
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Selective earth resistance of pylons with flex clamp
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Open-terminal test voltage 40 VAC
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Short-circuit test current > 220 mA
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Test frequency
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55 Hz…329 Hz
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0.010 Ω … 19.99 kΩ
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±(8 % of reading + 3 digits)
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659 Hz … 1.50 kHz
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0.00 Ω … 1.999 kΩ
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Passive mode
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0.00 Ω … 19.99 kΩ
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Earth resistance with two iron clamps
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Test frequency 82 Hz ... 329 Hz
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0.00 Ω … 9.99 Ω
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±(5% of reading + 2 digits)
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10.0 Ω … 49.9 Ω
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±(10 % of reading + 2 digits)
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50.0 Ω … 100 Ω
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±(20 % of reading)
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Specific earth resistance ro Wenner and Schlumberger method
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Open-terminal test voltage 20 or 40 V AC
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0.00 Ωm … 19.99 kΩm
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calculated value (consider uncertainty of 4 – pole measurement)
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Short-circuit test current >220 mA
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Test frequency 164 Hz
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Earth Potential
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Open-terminal test voltage 40 V AC
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0.0 mV … 49.99 V
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calculated value (consider uncertainty of 3 – pole measurement)
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Short-circuit test current >220 mA
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Test frequency 55 ÷ 329 Hz
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HF-Earth Resistance 3 pole
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Open-terminal test voltage 40 VAC
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0.00 Ω … 19.9 Ω
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±(3 % of reading + 2 digits)
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Short-circuit test current >40 mA
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20.0 Ω … 299 Ω
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Test frequency 25.000 Hz
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Impulse Earth Resistance
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Open-terminal test voltage ~120 V peak
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0.0 Ω … 199 Ω
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±(8 % of reading + 8 digits)
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Short-circuit test current ~6 A peak
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Impulse waveform 10 / 350 µs
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DC Resistance RLOW
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Test current 200 mA
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0.00 Ω … 1.99 kΩ
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±(2 % of reading + 2 digits)
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DC Resistance CONT
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Test current 7 mA
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0.00 Ω … 19.9 kΩ
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±(3 % of reading + 2 digits)
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AC Impedance
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Test frequency 55 Hz … 15 kHz
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0.00 Ω … 19.99 kΩ
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±(3 % of reading + 2 digits)
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Current RMS (Iron Clamp)
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Nominal frequency 45 Hz …1.5 kHz
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1.0 mA …7.99 A
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±(2 % of reading + 3 digits)
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Current RMS (Flex Clamp)
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Nominal frequency 45 Hz …1.5 kHz
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10 mA … 49.9 A
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±(8 % of reading + 3 digits)
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