14
4 Mounting
VEGAPULS C 21 • SDI-12
58342-EN-200121
Fig. 11: Gauge measurement dam, sensor mounting on bracket
Fig. 12: Gauge measurement deep well, sensor mounting on lid
4.5 Measurement setup - Flow
In general, the following must be observed while mounting the sensor:
•
Mounting the sensor on the upstream or inlet side
•
Installation in the centre of the flume and vertical to the liquid
surface
•
Distance to the overfall orifice or Venturi flume
•
Min. distance to the max. height of damming for optimum accu-
racy: 250 mm (9.843 in)
1)
Detailed project planning data can be found at the channel manufac-
turers and in the technical literature.
The following examples serve as an overview for flow measurement.
Dam gauge
Deep well level
1)
At smaller distances the measuring accuracy is reduced, see Technical data.
