Seaward ARE 1557 - Manual (Page 26)

ERT1557
Operating Instructions
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8.3 Specific Earth Resistance
Display
Range
0.00 Wm to 320kWm
Measurement
Ranges 0 Wm –19.99Wm Resolution 0.01 Wm
20 Wm – 199.9Wm Resolution 0.1 Wm
200 Wm - 999Wm Resolution 1 Wm
1.00k Wm – 9.99kWm Resolution 10Wm
10.00k Wm –99.9kWm Resolution 100Wm
100k Wm – 320kWm Resolution 1kWm
Accuracy 2% ± 2 counts 0 Wm – 6.3kWm
5% 6.3k Wm – 320kWm
Measuring
frequency 125 Hz ± 1Hz
Measuring
current <20mA effective
Measuring
voltage <30V effective sine wave
Distortion Max 5V p-p / 50Hz