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Kyoritsu KEW 4106 Earth Resistance & Resistivity Tester
High test current up to 80mA yielding resolution of 0.001on 2range.
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 measurement) | 2/td> | 0.001/td> | 0.03 - 2.099/td> | %rdg.03/td> |
| 20/td> | 0.01/td> | 0.03 - 20.99/td> | %rdgdgt (*1) | |
| 200/td> | 0.1/td> | 0.3 - 209.9/td> | ||
| 2000/td> | 1/td> | 3 - 2099/td> | ||
| 20k/td> | 10/td> | 0.03k - 20.99k/td> | ||
| 200k/td> | 100/td> | 0.3k - 209.9k/td> | ||
| Auxiliary earth resistance Rh, Rs | 8% of Re+Rh+Rs | |||
| Earth resistivity /th> | 2/td> | 0.1m - 1 Autoranging | 0.2 - 395.6 | 2aRg (*2) |
| 20/td> | 0.2 - 3956 | |||
| 200/td> | 20 - 39.56k | |||
| 2000/td> | 0.2 - 395.6k | |||
| 20k/td> | 2.0 - 1999k | |||
| 200k/td> | ||||
| Series interference voltage Ust (A.C only) (*3) | 50V | 0.1V | 0 - 50.9Vrms | %rdgdgt (50/60Hz) |
| %rdgdgt (40 - 500Hz) | ||||
| Frequency Fst | Autoranging | 0.1Hz 1Hz | 40Hz - 500Hz | %rdgdgt |
| 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 19264 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)") | |||
(*1) Auxiliary earth resistance is 100with 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.