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- High test current up to 80mA yielding resolution of 0.001Ω on 2Ω range.
- Advanced Filtering method (based on FFT Fast Fourier Transform) reduces noise interference for obtaining stable measurements.
- Automatic and Manual selection of the Test Current Frequency in four bands (94/105/111/128Hz). In Automatic mode, KEW 4106 will select the most suitable Frequency.
- Several sub-results can be shown on the display: Resistance of the Auxiliary Earth Spikes, Frequency of Test Current, Voltage and Frequency of Interference (noise), Residual Resistance Rk, etc.
- Large Graphic Display with backlight for readings in poorly illuminated areas.
- 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 using the “KEW Report” software and a USB adaptor (Model 8212-USB) which are included.
- Robust design with IP54 protection.
Function |
Range |
Resolution |
Measuring range |
Accuracy |
Earth resistance |
2Ω |
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 |
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2000Ω |
1Ω |
3 - 2099Ω |
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20kΩ |
10Ω |
0.03k - 20.99kΩ |
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200kΩ |
100Ω |
0.3k - 209.9kΩ |
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Auxiliary earth resistance |
|
|
|
8% of Re+Rh+Rs |
Earth resistivity |
2Ω |
0.1Ω•m - 1Ω•m |
0.2 - 395.6Ω•m |
ρ=2×π×a×Rg (*2) |
20Ω |
0.2 - 3956Ω•m |
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200Ω |
20 - 39.56kΩ•m |
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2000Ω |
0.2 - 395.6kΩ•m |
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20kΩ |
2.0 - 1999kΩ•m |
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200kΩ |
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Series interference voltage |
50V |
0.1V |
0 - 50.9Vrms |
|±2%rdg±2dgt (50/60Hz) |
|±3%rdg±2dgt (40 - 500Hz) |
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Frequency |
Autoranging |
0.1Hz |
40Hz - 500Hz |
|±1%rdg±2dgt |
Measuring method |
Earth resistance: Fall-of-potential method (currents and voltages measured via the Probes) |
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Memory capacity |
800 data |
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Communication Interface |
Model 8212-USB Optical Adaptor |
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LCD |
Dot-matrix 192×64 monochrome |
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Over-range Indication |
"OL" |
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Overload Protection |
between E-S(P) and between E-H(C) terminals AC280V / 10 sec. |
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Withstand voltage |
between the electrical circuit and enclosure AC3540V(50/60Hz) / 5 sec. |
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Applicable standards |
IEC 61010-1 CAT III 300V, CAT IV 150V Pollution degree 2 |
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Power source |
DC12V : sizeAA manganese dry battery (R6) × 8 |
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Dimensions |
167(L) × 185(W) × 89(D) mm |
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Weight |
approx. 900g (including batteries) |
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Accessories |
7229A (Earth precision measurement), |
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Optional |
8212-RS232C (RS232C adaptor with "KEW Report(Software)") |