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Model 4106 Earth
Resistance/Resistivity Tester |
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Earth Testers |
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Features
- High test current up to 80mA yielding resolution of 0.001Ω
on 2Ω range.
- Advanced filtering method, based on
Fast Fourier Transform (FFT) 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, the 4106 will select the most suitable
frequency.
- Several sub-results can be shown on the
display. Resistance of the Auxiliary Earth Spikes, Frequency of
the 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 reading 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 transmitted
to a PC using the 'KEW Report' software and a USB adaptor both
of which are included.
- Robust design with IP54 protection.
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Specifications |
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Function |
Range |
Resolution |
Measuring Range |
Accuracy |
Earth Resistance (RE)
(Rg at p measurement) |
2Ω |
0.001Ω |
0.03Ω to 2.099Ω |
±2% of rdg ±0.03Ω |
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20Ω |
0.01Ω |
0.03Ω to 20.99Ω |
±2% of rdg ±5 dgt
(note1) |
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200Ω |
0.1Ω |
0.3Ω to 209.9Ω |
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2000Ω |
1Ω |
3Ω to 2099Ω |
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20kΩ |
10Ω |
0.03Ω to 20.99kΩ |
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200kΩ |
100Ω |
3Ω to 209.9Ω |
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Auxiliary Earth Resistance (Rh, Rs) |
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8% of Re+Rh+Rs |
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Earth Resistivity ρ |
2Ω |
0.1Ω•m to 1Ω•m
Autoranging |
0.02 to 395.6Ω•m |
ρ=2×π×a×Rg
(note2) |
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20Ω |
0.02 to 3956Ω•m |
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200Ω |
20 to 39.56kΩ•m |
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2000Ω |
0.2 to 395.6kΩ•m |
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20kΩ |
2.0 to 1999kΩ•m |
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200kΩ |
2.0 to 1999kΩ•m |
Series Interference Voltage
Ust (AC only) (note3) |
50V |
0.1V |
0 to 50.9 Vrms |
±2% of rdg ±2 dgt
(50/60Hz) |
±3% of rdg ±2 dgt
(40 to 500Hz) |
Frequency
Fst |
Autoranging
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0.1Hz
1Hz |
40Hz to 500Hz |
±1% of rdg ±2 dgt |
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| Note1: |
Auxiliary earth resistance is 100Ω with
Rk correction. |
| Note2: |
Depending on the measured Rg. Interval [a] between auxiliary
earth spikes is 1.0 to 30.0m. |
| Note3: |
This instrument is NOT designed to measure line voltages on
commercial powers. |
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Measuring Method |
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Earth Resistance |
Fall-of-potential method (currents and voltages measured via Probes) |
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Earth Resistivity (ρ) |
Wenner 4-pole method |
Series Interference Voltage
(Earth Voltage) |
RMS Rectifier (between the E-S Terminals) |
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Other Specifications |
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Memory Capacity |
800 data |
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Communication Interface |
USB optical adaptor (Model 8212-USB) |
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LCD Readout |
Dot-matrix 192 x 64 monochrome |
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Over-range Indication |
"OL" |
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Overload Protection |
between E-S (P) and between E-H (C) terminals (280 volts AC for 10
sec.) |
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Withstand Voltage |
between electrical circuits and enclosure (3540 volts AC 50/60Hz for
5 sec.) |
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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), IEC60529 (IP54) |
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General Specifications |
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Power Source (DC 12V) |
Eight type 'AA' manganese dry batteries (R6P). Auto power off approx
5 min. |
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Dimensions |
167mm (L) x 185mm (W) x 89mm (D) |
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Weight |
approx. 900g (including batteries) |
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Ordering Information |
Model 4106
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Earth Resistance/Resistivity Tester supplied with: Precision
Measurement test leads (#7229), Simplified Measurement test leads
(#7238), Auxiliary Earth Spikes [2 spikes/set]x2 sets (4 spikes in
total) (#8032),
Cord Reel [4 pcs]x1 set, USB adaptor with "KEW Report Software"
(#8212-USB), Shoulder strap (#9121), Carrying Case (#9125), R6P x 8
batteries, Instruction manual, and Calibration Certificate. |
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Optional Accessory |
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Model 8212-RS232C |
RS-232C adaptor with "KEW Report Software" |
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