Nivus NivuFlow 750, Инструкция по эксплуатации

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Functional description
NFM 750 - rev. 03 / 27.05.2020 page 29
In asymmetric flow profiles and heavily structured profiles it is recommended to use more
than one flow velocity sensor. The entered sensor positions and the according individual ver-
tical V-profiles are included with the overall 3D-profile and are indicated as well.
Fig. 21-5 Computed 3-dimensional flow profile
Taking this flow velocity distribution as a basis, the flow rate can be calculated and indicated
by considering channel shape, channel dimensions and filling level. This flow rate is available
as free programmable analog signal or as impulse signal on the transmitter output.
21.2 Level measurement
21.2.1 2-wire level sensor
It is possible to directly connect 2-wire sensors supplied by the NivuFlow Mobile 750 (e.g.
NivuBar Plus or i-Series sensor).
Measurement ranges of the i-Series sensors
i-Series sensors have pre-programmed measurement ranges. For further reference see the
i-Series sensors instruction manual.
i-Sensors can be put into operation even without using a HART modem.
To do so enter the sensor’s measurement span in the parameter “Value at 20 mA”. De-
pending on the sensor installation height it may be necessary to additionally set a negative
offset value.
i-3 i-6 i-10 i-15
Distance to sensor face in [m] at
4 mA (empty) 0 %
3.0 6.0 10.0 15.0
Distance to sensor face in [m] at
20 mA (full) 100 %
0.125 0.300 0.300 0.500
Max. possible measurement span (value at
20 mA) in [m]
2.875 5.7 9.7 14.5
Table 4 i-Series sensors measurement span