EARTH RESISTANCE & RESISTIVITY TESTER

KEW 4106

Earth Resistance & Resistivity Tester

  • Earth resistance measurement with six ranges covering measurements from 0.001 Ω to 200 kΩ
  • Earth resistivity (ρ) measurement is automatically calculated after having set the distance between Auxiliary Earth Spikes (Wenner method)
  • Automatic and Manual selection of the Test Current Frequency in four bands of 94/105/111/128Hz
    In Automatic mode KEW 4106 will select the most suitable Frequency
  • Advanced Filtering method (based on FFT Fast Fourier Transform) reduces noise interference for obtaining stable measurements
  • Up to 800 measurement results can be saved in the memory and recalled on the display
  • The stored results can be transferred to a PC by using USB adapter (MODEL 8212-USB) and the special software "KEW Report"
  • Robust design with IP54 protection

Specification

Function Range Resolution Measuring range Accuracy
Earth resistance
Re
(Rg at
ρ measurement)
0.001Ω 0.03 - 2.099Ω ±2%rdg±0.03Ω
20Ω 0.01Ω 0.03 - 20.99Ω ±2%rdg±5dgt (*1)
200Ω 0.1Ω 0.3 - 209.9Ω
2000Ω 3 - 2099Ω
20kΩ 10Ω 0.03 - 20.99kΩ
200kΩ 100Ω 0.3 - 209.9kΩ
Auxiliary earth resistance
Rh, Rs
8% of Re+Rh+Rs
Earth resistivity
ρ
0.1Ω·mm - 1Ω·m
Auto-ranging
0.2 - 395.6Ω·m ρ=2×π×a×Rg (*2)
20Ω 0.2 - 3956Ω·m
200Ω 20Ω - 39.56kΩ·m
2000Ω 0.2 - 395.6kΩ·m
20kΩ 2.0 - 1999kΩ·m
200kΩ
Series interference voltage
Ust (A.C only) (*3)
50V 0.1V 0 - 50.9Vrms ±2%rdg±2dgt (50/60Hz)
±3%rdg±2dgt (40 - 500Hz)
Frequency
Fst
Auto-ranging 0.1Hz
1Hz
40Hz - 499.9Hz ±1%rdg±2dgt
Measuring method Earth resistance: Fall-of-potential method
(currents and voltages measured via the Probes)
Measurement method of Earth Resistivity (ρ): Wenner 4-pole method
Series interference voltage (earth voltage)
RMS Rectifier (between the E-S Terminals)
Memory capacity 800 data
Communication Interface Model 8212-USB Optical Adapter
LCD Dot-matrix 192×64 monochrome
Over-range Indication "OL"
Overload Protection between E-S(P) and between E-H(C) terminals AC280V / 10 sec.
Applicable standards IEC 61010-1 CAT Ⅲ 300V / CAT Ⅳ150V Pollution degree 2
IEC 61010-031, IEC 61557-1, 5, IEC 61326-1 (EMC), IEC 60529 (IP54)
Power source DC12V : sizeAA manganese dry battery (R6) × 8
(Auto power off: Approx. 5 minutes)
Dimension 167(L) × 185(W) × 89(D) mm
Weight Approx. 900g (including batteries)
Accessories 7229A (Earth precision measurement),
7238A (Simplified measurement test leads),
8032 (Auxiliary earth spikes [2 spiks/set])×2 sets (4 spikes in total),
8200-04 (Cord reel [4 pcs])×1 set,
8212-USB (USB adapter),
8923(Fuse [0.5A/600V]) × 1 (included), 1 (spare),
9121 (Shoulder strap),
9125 (Carrying case),
R6 × 8, Instruction manual

Please download “KEW Report(software)” from here.

*1 Auxiliary earth resistance is 100Ω with Rk correction
*2 Depending on the measured Rg. Interval [a] between auxiliary earth spikes is 1.0 - 30.0m  
*3 This instrument is NOT designed to measure line voltages on commercial powers.

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