Nivus NivuFlow 750, Instruction Manual

Page: 71 / 162

Parameter Setting
NFM 750 - rev. 03 / 27.05.2020 page 71
Fig. 36-3 Example of a channel profile menu
Pipe
This selection is suitable for round pipes, however can be used for half shells featuring a fill-
ing level of 50 % max. as well.
Deformed pipes featuring asymmetric height/width ratio can be set using the ellipsoid geome-
try selection.
For U-profiles there is an extra selection available.
Ellipse
Ellipsoid profiles can be found mainly in pipes subject to mechanical loads (lateral pressure
or crown pressure). There are also special channel shapes known as ellipsoid profiles.
Ellipsoid profiles versus Egg profile
Symmetric ellipsoid profiles should not be confused with ovoid profiles (egg-shaped).
Ovoid profiles feature different radii in bottom and crown which makes them symmetrical
only in a vertical sense.

Enter both dimensions of the ellipsoid profile.
Egg profile (Ovoid; 1:1.5)
This channel shape is a “standard egg shape” according to German DWA A 110 featuring a
width/height ratio of 1:1.5. Squeezed or shrunk ovoid profiles need to be set using a free pro-
file.
When setting the egg profile parameters only the maximum channel width needs to be en-
tered. The transmitter calculates the height automatically by using the fixed 1:1.5 ratio.
Rectangle
This selection can be used to set the parameters of channels featuring vertical walls and a
horizontal bottom. The parameters can be easily set by merely entering width and height of
the channel.
The menu moreover includes the option to set the parameters for channels with a centre dry
weather flume.
•
Rectangle with dry weather flume

Procedure:
1. Select the dry weather flume.