Extech Instruments GRT350, Руководство пользователя, Страница: 10 / 10

GRT350 ‐ en ‐ GB_v1.3 12/16
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Specifications
Earth Resistance Ranges Ranges: 0 ‐ 20 Ω , 0 ‐ 200 Ω , 0 ‐ 2k Ω
Accuracy: ±(2%rdg+3dgt)
Earth Resistance Resolution 0 ‐ 20 Ω : 0.01 Ω
0 ‐ 200 Ω : 0.1 Ω
0 ‐ 2k Ω : 1 Ω
Earth Voltage Range: 0 ‐ 300VAC (50/60 Hz)
Accuracy: ±(2%rdg+3dgt)
Earth Resistivity Ranges (
ρ
)
( ρ = 2 π LR)
L = distance between probes
R = resistance
0.06 ‐ 6.28 k Ω .m
0.62 ‐ 62.8 k Ω .m
6.28 ‐ 628 k Ω .m
Test Frequency 820Hz
Test Current 2mA
Data Memory 200 manual locations
Test lead lengths Green lead 5 m (16 ft)
Black lead 10m (32 ft)
Yellow lead 10m (32ft)
Red lead 15m (49ft)
Temperature & Humidity Operating: 0 to 50°C (32 to 122°F);
≦
80%R.H.
Storage: ‐ 10 to 60°C (14 to 140°F);
≦
80%R.H.
Altitude 2000m (6500’) max
Power Source 1.5V(AA) x 8 batteries
Dimensions 250(L) x 190(W) x 110(D)mm (9.84 x 7.5 x 4.33”)
Weight Approx. 1430g (batteries installed)
Fuse 500mA/500V (5 x 20mm) fast blow, ceramic type
Safety Standards
CAT IV ‐ 300V, EN 61010 ‐ 1, EN 61326 ‐ 1, EN 61557 ‐ 1, EN 61557 ‐ 5
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