KYORITSU KEW 4300 Simplified Earth Tester (Made In THAILAND)

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KYORITSU KEW 4300 Simplified Earth Tester (Made In THAILAND) The KYORITSU KEW 4300 Simplified Earth Tester (Made In THAILAND) is a handheld, simplified earth resistance tester designed for quick, two-pole measurements using existing earth electrodes (e.g. buried water pipes or building lightning rods). Its compact body houses a rotary range switch and an integral LED work‐light that automatically adapts to ambient brightness, making it ideal for field use in dimly lit areas. Employing a constant-current fall-of-potential method, the tester injects a small AC current (≈1.4 mA at 825 Hz on the 200 Ω range; ≈0.7 mA at 825 Hz on the 2000 Ω range) between the H(C) and E terminals, then measures the voltage drop to calculate “Rx + re.” The result earth resistance plus any existing earth electrode resistance is displayed instantly; deduct any known “re” to obtain true “Rx”. Built to withstand indoor environments up to 2000 m altitude, the KEW 4300 features a protective finger-guard, glow-in-the-dark TEST button, and a warning buzzer that sounds below 100 Ω. Its backlit LCD auto-shuts after 2 minutes, and the instrument powers off after 10 minutes of inactivity, preserving two AA alkaline cells. A live-circuit LED warns if line voltage exceeds 30 V during resistance measurement. Features: 2-pole earth resistance tester using existing electrodes (fall-of-potential). Auto-ranging: 200 Ω / 2000 Ω. Small test current (max 2 mA) avoids tripping ELBs. Warning buzzer for readings ≤ 100 Ω. Live-circuit warning LED at ≥ 30 V. Automatic LED work-light with ambient sensor. Backlight auto-off (≈2 min); auto-power-off (≈10 min). Glow-in-the-dark TEST button for low-light use. Protective finger-guard for safety. User-replaceable metal tips (3 types). Specifications: Parameter Details Earth Resistance: 0.0–209.9 Ω (200 Ω range); 160–2099 Ω (2000 Ω range); ±3% rdg ± 5 dgt (200 Ω) Earth Voltage: AC 5–300 V RMS (45–65 Hz), DC ±5–300 V; ±1% rdg ± 4 dgt (AC), ±1% rdg ± 8 dgt (DC) Measurement Current: ~1.4 mA @825 Hz (200 Ω); ~0.7 mA @825 Hz (2000 Ω) Work-light & Display: LED work-light + backlit LCD; auto-off after 2 min Safety Standards: IEC 61010-1 CAT III 300 V; IEC 61557-1,-5; Pollution degree 2; IP40 Operating Temp/Humidity: –10 °C to 50 °C; ≤ 80% RH (no condensation) Storage Temp/Humidity: –20 °C to 60 °C; ≤ 75% RH (no condensation) Power: 2 × AA alkaline batteries; auto-power-off after 10 min Dimensions & Weight: 232 × 51 × 42 mm; approx. 220 g (incl. batteries) Applications: Earth Resistance Testing of Distribution Lines. Earth Resistance Testing of In-House Wiring Systems. Earth Resistance Testing of Electrical Appliances. Package Contents: 1x MODEL 7248 precision test leads (alligator clip + flat test bar) 1x Banana plug (both ends, black) 1x Alligator clip 1x Flat test bar Metal tips for H+S(C+P) terminal: 1x MODEL 8072 (standard) 1x MODEL 8253 (molded) 1x MODEL 8017 (long type) 1x Carrying case 1x Strap 2x AA alkaline batteries 1x Instruction manual Documents: Instruction Manual