Instruction Manual
NivuFlow 650
page 86
NF 650 - rev. 01 / 29.06.2020
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 indivi-
dual 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 here too after the channel parame-
ters have been set.
7. Use the 3D view to verify whether the dimensions are specified correctly.
Thanks to this visual aid, bad programming issues can be visualised and corrected
directly if required.
Free symmetric height-area profile (Height-Area)
Some hydraulic tables may contain height-area value pairs instead of height-width to specify
symmetric channels. In such cases enter the value pairs into the selected height-area table.
Necessarily observe
here the relevant note above on the
viewing direction
with free profiles
on page 85.
The following procedure is the same as with programming height-width profiles. The program-
med profile however cannot be indicated as graph here.
Q/h-Function (Q=f(h))
Fig. 32-6
Q/h-Function
This function significantly varies from the functions described above.
The selection is neither considering the channel profile nor the flow velocity and the
commu-
nication
with flow velocity sensors which may be connected is
disabled
. The missing flow
velocity values will not be considered to create possible error diagnostics.
The system exclusively operates a Q/h-function. This means that a defined flow rate depend-
ing on the currently measured level is indicated. This value is entered into a value table
depending on the height.
This table can hold a maximum of 32 height-related breakpoints. The transmitter linearises
between individual breakpoints.
