Kyoritsu Indonesia - Earth Resistance & Resistivity Tester
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
Re
(Rg at
ρ measurement)
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
Rh, Rs
8% of Re+Rh+Rs
Earth resistivity
ρ
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
Ust (A.C only) (*3)
50V
0.1V
0 - 50.9Vrms
±2%rdg±2dgt (50/60Hz)
±3%rdg±2dgt (40 - 500Hz)
Frequency
Fst
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)
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)
Power source
DC12V : sizeAA manganese dry battery (R6) × 8
(Auto power off: approx. 5 minutes)
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
Optional
8212-RS232C (RS232C adaptor with "KEW Report(Software)")