Kyoritsu KEW 4106 Earth Resistance & Resistivity Tester
- 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.
- Warning for excessive noise and high Auxiliary Earth Spikes resistance.
- 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 | |||
| 2000Ω | 1Ω | 3 – 2099Ω | |||
| 20kΩ | 10Ω | 0.03k – 20.99kΩ | |||
| 200kΩ | 100Ω | 0.3k – 209.9kΩ | |||
|
Auxiliary earth resistance |
8% of Re+Rh+Rs | ||||
|
Earth resistivity |
2Ω | 0.1Ω·mm – 1Ω·m Autoranging |
0.2 – 395.6Ω·m | ρ=2×π×a×Rg (*2) | |
| 20Ω | 0.2 – 3956Ω·m | ||||
| 200Ω | 20 – 39.56kΩ·m | ||||
| 2000Ω | 0.2 – 395.6kΩ·m | ||||
| 20kΩ | 2.0 – 1999kΩ·m | ||||
| 200kΩ | |||||
|
Series interference voltage |
50V | 0.1V | 0 – 50.9Vrms | ±2%rdg±2dgt (50/60Hz) | |
| ±3%rdg±2dgt (40 – 500Hz) | |||||
|
Frequency |
Autoranging | 0.1Hz 1Hz |
40Hz – 500Hz | ±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) |
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Memory capacity |
800 data | ||||
|
Communication Interface |
Model 8212-USB Optical Adaptor | ||||
|
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 IV 150V Pollution degree 2 IEC 61010-031, IEC 61557-1, 5, IEC 61326-1 (EMC), IEC 60529 (IP54) |
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|
Power source |
DC12V : sizeAA manganese dry battery (R6) × 8 (Auto power off: approx. 5 minutes) |
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Dimensions |
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 adaptor with “KEW Report(Software)”), 9121 (Shoulder strap), 9125 (Carrying case), R6 × 8, Instruction manual, Calibration certificate |
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Optional |
8212-RS232C (RS232C adaptor with “KEW Report(Software)”) | ||||
