مشخصات فني


• تست بالا در حال حاضر تا 80mA قطعنامه بازده از 0.001Ω بر روی طیف وسیعه 2Ω.
• روش فیلتر پیشرفته (بر اساس تبدیل فوریه سریع FFT) تداخل سر و صدا را کاهش می دهد برای به دست آوردن اندازه گیری های پایدار .
• انتخاب اتوماتیک و دستی فرکانس آزمون در چهار باند (94/105/111/128Hz). در حالت اتوماتیک، KEW 4106 فرکانس مناسب ترین را انتخاب کنید.
• چندین زیر نتایج را می توان در صفحه نمایش نشان داد: مقاومت سنبله زمین کمکی، فرکانس تست جریان، ولتاژ و فرکانس تداخل (نویز)، RK مقاومت در وجود آنها باقی بماند، و غیره 
 
 
•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.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
FunctionRangeResolutionMeasuring rangeAccuracy
Earth resistance
Re
(Rg at
ρ measurement)		2Ω0.001Ω0.03~2.099Ω|±2%rdg±0.03Ω
20Ω0.01Ω0.03~20.99Ω|±2%rdg±5dgt (*1)
200Ω0.1Ω0.3~209.9Ω
2000Ω1Ω3~2099Ω
20kΩ10Ω0.03~20.99kΩ
200kΩ100Ω3~209.9kΩ
Auxiliary earth resistance
Rh, Rs		   8% of Re+Rh+Rs
Earth resistivity
ρ		2Ω0.1Ω•m~1Ω•m
Autoranging		0.2~395.6Ω•mρ=2×π×a×Rg (*2)
20Ω0.2~3956Ω•m
200Ω20~39.56kΩ•m
2000Ω0.2~395.6kΩ•m
20kΩ2.0~1999kΩ•m
200kΩ
Series interference voltage
Ust (A.C only) (*3)		50V0.1V0~50.9Vrms|±2%rdg±2dgt (50/60Hz)
|±3%rdg±2dgt (40~500Hz)
Frequency
Fst		Autoranging0.1Hz
1Hz		40Hz~500Hz|±1%rdg±2dgt
Measuring methodEarth 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 capacity800 data
Communication InterfaceModel 8212-USB Optical Adaptor
LCDDot-matrix 192×64 monochrome
Over-range Indication"OL"
Overload Protectionbetween E-S(P) and between E-H(C) terminals AC280V / 10 sec.
Withstand voltagebetween the electrical circuit and enclosure AC3540V(50/60Hz) / 5 sec.
Applicable standardsIEC 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 sourceDC12V : sizeAA manganese dry battery (R6P) × 8
(Auto power off: approx. 5 minutes)
Dimensions167(L) × 185(W) × 89(D) mm
Weightapprox. 900g (including batteries)
Accessories7229A (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
Optional8212-RS232C (RS232C adaptor with "KEW Report(Software)")
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