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Specification

• High test current up to 80mA yielding resolution of 0.001© on 2© 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.

Earth resistance
Re
(Rg at
� measurement) (Function) 2© 20© 200© 2000© 20k© 200k© (Range) 0.001© 0.01© 0.1© 1© 10© 100© (Resolution) 0.03~2.099© 0.03~20.99© 0.3~209.9© 3~2099© 0.03~20.99k© 3~209.9k© (Measuring range) ±2%rdg±0.03©
±2%rdg±5dgt (*1) (Accuracy)
Auxiliary earth resistance
Rh, Rs : 8% of Re+Rh+Rs (Accuracy)
Earth resistivity
� : 2© 20© 200© 2000© 20k© 200k© (Range) 0.1©•m~1©•m
Autoranging (Resolution) 0.2~395.6©•m 0.2~3956©•m 20~39.56k©•m 0.2~395.6k©•m 2.0~1999k©•m (Measuring range) �=2×À×a×Rg (*2) (Accuracy)
Series interference voltage
Ust (A.C only) (*3) : 50V (Range) 0.1V (Resolution) 0~50.9Vrms (Measuring range) ±2%rdg±2dgt (50/60Hz)
±3%rdg±2dgt (40~500Hz) (Accuracy)
Frequency
Fst : Autoranging (Range) 0.1Hz 1Hz (Resolution) 40Hz~500Hz (Measuring range) ±1%rdg±2dgt (Accuracy)
Measuring method : Earth resistance: Fall-of-potential method (currents and voltages measured via the Probes)
Measurement method of Earth Resistivity (�): 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 : 7229 (Precision measurement test leads),
7238 (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)")

(*1) Auxiliary earth resistance is 100© 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.