Nivus NivuFlow 750, Instruction Manual

Page: 87 / 162

Parameter Setting
NFM 750 - rev. 03 / 27.05.2020 page 87
Fig. 36-20 Weighting v-sensor
36.3.5 v-Determination low levels
Due to constructional and physical reasons the flow velocity sensors cannot measure the flow
velocity anymore below a certain minimum level. This minimal height is:
•
Type CSM: 3 cm
•
Type CSM-D: 5.5 cm
•
Type CSP: 8 cm
Poor application conditions or an elevated sensor installation may push this level even high-
er. This level is referred to as
h-crit .
Fig. 36-21 Sub menu: v-determination low levels
The >v-determination low levels< menu facilitates the detection of temporary low flow vol-
umes (such as discharges at night, infiltration water or similar).
A requirement for this function is:
•
The application must be backwater-free.