8 Mounting of the Transducers
UMFLUXUS_G8V4-6-1EN, 2018-10-10
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8
Mounting of the Transducers
8.1
Preparation of the Pipe
• The pipe has to be stable. It has to be able to withstand the pressure exerted by the transducer mounting fixture.
• Install the damping mats (see chapter 9).
• Use coupling foil or apply a bead of acoustic coupling compound along the center line of the contact surface of the trans-
ducers.
• Observe that there must be no air pockets between the transducer contact surface, damping mat and the pipe wall.
8.2
Orientation of the Transducers and Transducer Distance
Mount the transducers onto the pipe in such way that the engravings on the transducers form an arrow (see Fig. 8.1). The
transducer cables show in opposite directions.
The transducer distance is the distance between the inner edges of the transducers (see section 3.3 and Fig. 8.1).
For the determination of the flow direction see section 11.8.
Select the installation instructions that correspond to the supplied transducer mounting fixture:
• Variofix L: see section 8.3
• Variofix C: see section 8.4
8.3
Transducer Mounting Fixture Variofix L
When measuring in reflection arrangement, the transducer mounting fixtures are mounted on the same side of the pipe
(see Fig. 8.2).
When measuring in diagonal arrangement, the transducer mounting fixtures are mounted on the opposite sides of the pipe
(see Fig. 8.3).
In the following, the mounting of two transducer mounting fixtures in reflection arrangement is described (one transducer
mounting fixture for each transducer).
Fig. 8.1: Correct orientation of the transducers and transducer distance
Fig. 8.2: Transducer mounting fixture Variofix L (reflection arrangement)
Fig. 8.3: Transducer mounting fixture Variofix L (diagonal arrangement)
transducer Distance
