Bjong – User Manual – V1.0 - pg.46
Salinity: in which the sensor is installed. The type of water
is useful to correct the read level based on the sality of
water.
Hydraulic factor: is a multiplicative value of velocity used
only by the device (reading only).
Velocity calibration: it allows to set a multiplier of velocity.
Use this coefficient to eventually calibrate the read velocity.
After setting the configuration, make sure to log the variables of interest correctly in the
appropriate section.
12.1.2.1.1 Definition of customized channel shape
The custom shape of the channel allows you to define an open channel with a non-standard shape. The
definition takes place by setting the channel width at different altitudes. The device interpolates linearly
obtaining the overall area from the sum of overlapping trapezoids.
By entering the points, the height of the geometry refers to the channel bottom and the width is the width
of the channel at that height. All measurements are in millimeters.
The shape has to include at least two points:
✓ A Zero height point indicating the channel bottom width;
✓ A Max height point indicating the maximum channel height.
In addition to the manual definition, it is possible to import the channel shape from a file, using the
appropriate button. The file must be a text one (csv, txt or equivalent extension) with as many lines as
there are points to define. There may be a first header row which, if there are no numeric values, is
ignored.
Subsequent lines must contain two integer numeric values separated by “;”.
The first value indicates the height of the channel, the second the respective width.
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