Nivus NivuFlow 750, Instruction Manual

Page: 79 / 162

Parameter Setting
NFM 750 - rev. 03 / 27.05.2020 page 79
the risk of soiling. In this case water-ultrasound from the bottom up however must not
be used since this may lead to measurement failure!
For such situations a different level sensor (ultrasound from top down or pressure cell)
must be used.
•
Fixed value
This option is conceived for permanently full pipes and channels. Such applications do
not require level measurements. The measurement system in this case provides the
constant filling level required for flow calculation.
This parameter can be used as supporting value for tests or for initial start-ups if level
values are not available.
36.2.2 Define Measuring Ranges
Depending on type and number of the selected sensors a coloured bar is shown on the right-
hand side of the channel profile graph. The colour of this bar indicates the individual sensor
operating range.
•
Measuring range

Top: red

Centre: yellow

Bottom: green
•
Number of sensors used

only one: solid green bar

two: colour combination green/red
Fig. 36-9 Sensor selection and indication of sensor measuring ranges
Depending on type and number of the selected sensors 1…3 coloured programming sections
are shown below the channel profile graph. The colours of this programming sections are
equal to the colours of the sidebars and the according sensors.
•
Measuring range

Top: red

Centre: yellow

Bottom: green