| Measurement Functions: |
– Grounding resistance (AC/DC) via 2-, 3-, and 4-wire methods
– Selective (single-clamp) 3 / 4-wire methods
– Double-clamp grounding resistance
– Soil resistivity (Wenner method)
– Grounding current (AC clamp)
– Grounding voltage (AC) |
| Measurement Ranges & Accuracies: |
– Grounding R (2 / 3 / 4-wire): 0.00 Ω–300.00 kΩ, accuracy ±2 %rdg ±3 dgt (0.01 Ω – 29.99 Ω); ±2 %rdg ±5 dgt (0.00 Ω – 0.99 Ω); higher ranges ±2 %rdg ±3 dgt to ±4 %rdg ±3 dgt
– Grounding R (selective): 0.00 Ω–3000 Ω, accuracy ±2 %rdg ±5 dgt to ±2 %rdg ±3 dgt
– Grounding R (double-clamp): 0.01 Ω–100 Ω, accuracy ±10 %rdg ±5 dgt to ±2 %rdg ±3 dgt
– Soil Resistivity: 0.00 Ω·m–9,000 kΩ·m (dependent on R accuracy)
– AC Voltage: 0.0 V–100.0 V, accuracy ±2 %rdg ±3 dgt
– AC Current: 0.00 mA–600.0 A, accuracy ±2 %rdg ±3 dgt |
| Test Frequencies: |
Automatic Frequency Control (AFC): 128 Hz, 111 Hz, 105 Hz, 94 Hz |
| Short-Circuit Test Current / Open-Circuit Voltage: |
– Short-circuit: AC 250 mA max
– Open-circuit: AC 40 V max |
| Auxiliary Grounding Resistance Test: |
0.00 kΩ–30.00 kΩ (requires 100 Ω + rC < 50 kΩ, 100 Ω + rP < 50 kΩ) |
| Display: |
4-digit ultra-large LCD (128 mm × 75 mm) with backlight and bar-graph indication |
| Data Storage / Viewing: |
– Stores up to 2,000 groups, with date/time stamps
– “HOLD” function for data freeze
– “READ” mode to scroll through stored records
– “CLR” to delete all memory |
| Power Supply / Battery: |
– Rechargeable lithium battery: DC 7.4 V, 2600 mAh
– Operating voltage: 7.8 V ± 0.6 V
– Charging time 2 h; indicator LED red (charging), green (full)
– Auto power-off after 15 minutes of inactivity |
| Measurement Time / Cycle: |
– AC current / voltage: 2 readings/sec
– Ground resistance (double-clamp): 7 s per reading
– ≥ 5000 cycles (short-circuit once, rest 30 s, retest) |
| Environmental & Safety Ratings: |
– Operating temperature: –10 °C to 40 °C; ≤ 80 % RH
– Storage temperature: –20 °C to 60 °C; ≤ 70 % RH
– Protection: IP65 (with cover closed)
– Overload protection: 280 V rms / 3 s for C(H)–E, P(S)–ES and between terminals
– Insulation resistance: > 20 MΩ (500 V DC between circuit and case)
– Dielectric withstand: 3700 V rms between circuit and case
– Safety: IEC61010-1 CAT III 300 V, CAT IV 150 V, Pollution degree 2; IEC61557-1, IEC61557-5 |
| Physical Dimensions: |
– Tester: 280 × 260 × 160 mm (H × W × D)
– Current clamp (each): 223 × 120 × 39 mm (H × W × D); clamp diameter φ 70 mm
– Tester weight (with battery): ~3490 g
– Two current clamps (each ~1100 g), total kit weight ~6800 g (including accessories) |
| Test Leads & Accessories: |
– Four test leads: 20 m red/black; 10 m yellow/green
– Simple test leads: 1.6 m red/black
– Current clamps: two with 2 m leads (red-black plug; blue-black plug)
– Auxiliary ground rods: 4 pcs (φ 10 mm × 250 mm each)
– USB cable (1.5 m)
– Charger (dedicated) |
| Communication / PC Software: |
– USB interface for data upload
– PC software supports data access, viewing, report generation, printing |
| Other Indicators / Functions: |
– Overload (“OL”) indication
– Low-battery (“ ”) indication at ~7.2 V ± 0.1 V
– Interference detection (“NOISE”) when > 5 V present
– Alarm function with adjustable threshold (buzzer “Beep-Beep-Beep”) |
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