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Kyoritsu KEW 4200 Earth Clamp Tester
The Kyoritsu KEW 4200 is a specialized clamp-on digital earth resistance and leakage current tester engineered for multi-grounded electrical systems. Measuring ground resistance from 0.05 Ω to 1500 Ω without driving auxiliary earth stakes or disconnecting parallel ground rods, it also captures True-RMS AC leakage current from 0.1 mA up to 30 A in a rugged CAT IV 300V rated handheld form factor.
Key Features
- Clamp-on earth testing — no auxiliary spikes or disconnection needed.
- Earth resistance measurement 0.05 to 1500 Ω.
- True-RMS AC leakage current 1 mA to 30 A (distorted waveforms included).
- Memory for up to 100 readings; data hold and buzzer alarm.
- Backlight and noise detection for reliable field use.
- High CAT IV 300 V safety rating.
- For multiple-earthing systems (not single isolated earths).
Applications
- Fast earth-resistance checks on multiple-earthing systems.
- Tower footings, distribution earths and parallel-earthed installations.
- Earth-leakage current measurement.
- Routine earthing inspection where spikes cannot be used.
Description
What’s in the Box
- KEW 4200 digital earth clamp tester.
- Batteries.
- Carrying case and instruction manual.
Kit contents may vary by order; contact Auzar to confirm your configuration.
Technical Specifications
| Specification Parameter | Value / Range |
| Brand / Manufacturer | Kyoritsu Electrical Instruments Works, Ltd. |
| Model | KEW 4200 (Model 4200, MME SKU: 4007) |
| Earth Resistance Auto-Range | 20.00 Ω / 200.0 Ω / 1500 Ω |
| Earth Resistance Accuracy |
0.00 ~ 20.99 Ω: ±1.5% ±0.05 Ω 16.0 ~ 99.9 Ω: ±2.0% ±0.5 Ω 100.0 ~ 209.9 Ω: ±3.0% ±2.0 Ω 160 ~ 399 Ω: ±5.0% ±5.0 Ω 400 ~ 599 Ω: ±10.0% ±10.0 Ω 600 ~ 1580 Ω: Indication only |
| AC Current Auto-Range (50/60Hz) | 100.0 mA / 1000 mA / 10.00 A / 30.0 A (True-RMS) |
| AC Current Accuracy |
0.0 ~ 104.9 mA: ±2.0% ±0.7 mA 80 mA ~ 31.5 A: ±2.0% |
| Conductor Diameter Capacity | Approx. Ø 32 mm max. |
| Test Injection Frequency | Constant voltage injection at approx. 2400 Hz |
| Memory Function | Stores and displays up to 100 test measurements |
| Buzzer Alarm Function | Sounds audible alert when earth resistance is $\le 10\ \Omega$ |
| Display | LCD with backlight, data hold, and “NOISE” warning indicator |
| Response Time | Approx. 7 seconds (Earth resistance), approx. 2 seconds (AC current) |
| Applicable Standards | IEC 61010-1 CAT IV 300 V Pollution Degree 2, IEC 61010-2-032, IEC 61326 (EMC) |
| Power Source | 4 × 1.5 V AA Alkaline (LR6) or Manganese (R6) batteries |
| Battery Life | Approx. 24 hours continuous use with LR6 alkaline cells |
| Dimensions & Weight | 246 (L) × 120 (W) × 54 (D) mm; Approx. 780 g (including batteries) |
| Standard Included Accessories | Model 8304 Operation Check Resistor (1Ω & 10Ω loop), Model 9166 Hard Carrying Case, 4× R6 Batteries, Instruction Manual |
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