Nivus NivuFlow 750, Instruction Manual

Page: 73 / 162

Parameter Setting
NFM 750 - rev. 03 / 27.05.2020 page 73
Fig. 36-4 Setting of profile using height-width (sym.)
Drawing required
A true to scale drawing is required to set the channel parameters.

Procedure:
1. Draw a vertical auxiliary line onto the drawing in the channel centre.
2. Then draw horizontal auxiliary lines on the distinct points where the profile
changes.
3. Measure the length of the auxiliary lines and subsequently convert the length
true to scale.
4. Start at level “0” to define the starting point of the channel.
5. Enter height and width of all other breakpoints “freely”.
The distance between individual height breakpoints may vary. Not all of the 32
breakpoints need to be necessarily entered in order to define the profile since
the transmitter linearises between individual breakpoints.
In case of large irregular changes of the channel dimensions select a lower dis-
tance between breakpoints in this section.
A proportional graph of the values is indicated after the channel parameters
have been set.
6. Use the 3D view to verify whether the dimensions are specified correctly.
Thanks to this visual aid, bad programming issues can be visualised and cor-
rected directly if required.
Free asymmetric height-width profile (Height-Width (asym.))
In practice asymmetric profiles with unusual shapes can be found occasionally. This is where
the programming options for asymmetric profiles are used.
Note on the viewing direction with free profiles
The viewing direction >Width left< or >Width right< is opposite to the flow direction in the
channel.