Seaward ARE 1557 - Manual (Page 25)

ERT1557
Operating Instructions
- 25 -
8 Electrical Specifications
8.1 Earth Resistance Two/Three Pole Method
Display Range 0.00W to 50.0kW
Measurement
Ranges
0Ω - 19.99Ω Resolution 0.01Ω
20Ω - 199.9Ω Resolution 0.1Ω
200Ω - 199.9Ω Resolution 1Ω
1.00KΩ - 9.99KΩ Resolution 10Ω
10.0KΩ - 50.0KΩ Resolution 100Ω
Accuracy 2% ± 2 counts from 0Ω - 999Ω
5% ± 2 counts from 1.00kΩ - 50.0kΩ
Measuring
frequency 125 Hz ± 1HZ
Measuring
current <20mA effective
Measuring
voltage
<30V effective sine wave
Distortion Max 5V p-p / 50Hz
8.2 Earth Resistance Current Clamp Method
Display Range 0.00W to 2.0kW
Measurement
Ranges
0.5Ω - 19.9Ω Resolution 0.1Ω
20Ω – 999Ω Resolution 1Ω
1.00Ω - 2.00kΩ Resolution 10Ω
Accuracy 5% + 2 counts
Measuring
frequency 125 Hz ± 1Hz
Measuring
current
<20mA effective
Measuring
voltage
<30V effective sine wave
Distortion Max 5V p-p / 50Hz
Note: the stated accuracy of the earth resistance
current clamp method does not include errors
introduced by the current clamp