•

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

0.03~20.99kΩ

200kΩ

100Ω

3~209.9kΩ

Auxiliary earth resistance
Rh, Rs

8% of Re+Rh+Rs

Earth resistivity
ρ

2Ω

0.1Ω•m~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.

Withstand voltage

between the electrical circuit and enclosure AC3540V(50/60Hz) / 5 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 (R6P) × 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),
R6P×8, Instruction manual, Calibration certificate

Optional

8212-RS232C (RS232C adaptor with "KEW Report(Software)")