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Extech
Extech GRT300 4-Wire Earth Ground Resistance Tester
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Ключевые параметры
Accuracy
±(2% of reading + 3 digits)
Supply
Eight 1.5 V AA batteries
Earth Resistance Ranges
2 Ω / 20 Ω / 200 Ω / 2000 Ω
Resolution
0.01 Ω / 0.1 Ω / 1 Ω / 0.01 kΩ
Test Current Frequency
<2 mA / 820 Hz
Earth Voltage
0 to 300 VAC (40–500 Hz); ±(2%rdg + 3d)
| Параметр | Значение |
|---|---|
| Accuracy | ±(2% of reading + 3 digits) |
| Supply | Eight 1.5 V AA batteries |
| Earth Resistance Ranges | 2 Ω / 20 Ω / 200 Ω / 2000 Ω |
| Resolution | 0.01 Ω / 0.1 Ω / 1 Ω / 0.01 kΩ |
| Test Current Frequency | <2 mA / 820 Hz |
| Earth Voltage | 0 to 300 VAC (40–500 Hz); ±(2%rdg + 3d) |
| Test Modes | 2-wire, 3-wire, and 4-wire earth resistance; automatic I/P spike check |
| Safety Category | CAT IV 300 V |
| Form Factor | 9.8 × 7.8 × 4.3 in (250 × 190 × 110 mm); 3.15 lb (1430 g) |
| Included | Test leads with alligator clips, 4 earth bars, hard case, batteries |
| Family | Extech GRT300 |