Hydro International Hydro-Logic Flexi Logger 300Ex, Руководство пользователя

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Hydro-Logic
®
Flexi Logger 300Ex
User Manual
22 August 2018 Page 43 of 74
Water level with respect to datum
Water level can be measured with respect to an arbitrary datum without having to
determine the level above the sensor. The Hydro-Logic
®
Flexi Logger 300Ex and
Harvest software automatically determine the sensor depth and apply the datum
offset during configuration.
In the example above, the water is 2.2m deep with respect to arbitrary datum D.
The sensor is only d (1.2m) deep in the water, but when the level is set, the offset
to the datum is automatically applied so the logger displays levels with respect to
the datum (here 2.2m).
This method works for both HART and 4-20mA water level sensors. The raw
value is also displayed, so it is still possible to determine the water level above
the sensor.