Installing/mounting
4.4Measurement setup - Flow
Figure4.8 Agitators
Foam generation
Through the action of filling, stirring and other processes in the vessel, foams which
considerably damp the emitted signals may form on the medium surface.
If foams lead to measurement errors, you should use transmitters with guided radar.
4.4 Measurement setup - Flow
Mounting
In general, the following must be observed while mounting the device:
• Mounting the transmitter 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 the orifice or flume for optimum accuracy:
250mm (9.843in)
1
• Requirements from approvals for flow measurement, e.g. MCERTS
Flume
Every flume generates a different level of backwater depending on its type and
version. The specifications of the following flumes are available in the transmitter:
1
At smaller distances the measuring accuracy is reduced, see "Technical data".
SITRANS LR100
Operating Instructions, 10/2021, 62705-76-01
15
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