Seaward ARE 1557 User Manual
Page 26
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![background image](/files/804150/content/doc026.png)
ERT1557
Operating Instructions
- 26 -
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
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