Nivus NivuFlow 750, Instruction Manual

Page: 81 / 162

Parameter Setting
NFM 750 - rev. 03 / 27.05.2020 page 81
The range of each programming section can be modified. To do so, change the respective
>Switchover height< accordingly.
Specify positioning values accurately
Observe to accurately specify the positioning values of the individual sensors.
Sensors with built-in pressure measurement cell shall be installed at the lowest point of the
channel bottom (sensor Type CSP-V2D, CSP-V2U and CSM-V1D).
If sensors should feature an elevated mounting position (block or similar) or should be in-
stalled on a berm, it is necessary to enter a different value as mounting height. Measure the
distance from the
bottom edge of the sensor mounting plate down to the lowest point of the
application.
Then enter this value as >Mounting height<.
The centre of the sensor mounting plate is the reference value in the event of tilted or in-
clined sensors (such as lateral installation within pipes or trapezoid channels).
The sensor position value is accepted automatically for the position of the v-sensor as well as
for the determination of v-crit (see chapter “36.3.5 v-Determination low levels”).
It is possible to additionally enter an offset to adjust the pressure sensors.
Fig. 36-12 Programming integrated pressure sensor
The same specifications apply for flow velocity sensors with integrated water-ultrasonic sen-
sor. Measure the distance from the top edge of the sensor crystal.
The system automatically detects and considers these differences accordingly while connect-
ing the sensors.
36.3 Setting Parameters in Menu v-Sensors
Apart from the measurement place and the level sensors, the third relevant point is setting
the parameters of the flow velocity sensors. Except type and number of sensors this menu
moreover includes the spatial position. The values specified within this menu relate to the de-
fined channel regarding shape and spatial dimension (see chapter “36.1.2 Channel Profiles”).
36.3.1 Number of Flow velocity sensors
You can connect one flow velocity sensor to the NivuFlow Mobile 750 transmitter.
The option to connect up to three flow velocity sensors is currently not supported, however, in
preparation.