Flexim FLUXUS WD100, User Manual

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7 Installation of the Transducers FLUXUS WD100, WD200
UMFLUXUS_F5WDV1-1EN, 2016-04-08 33
7 Installation of the Transducers
• Before starting this chapter, read and follow the instruction in chapter 9.
The transducers will be fixed to the pipe by means of the supplied transducer mounting fixture.
7.1 Preparation of the Pipe
Rust, paint or other deposits on the pipe absorb the sound signal. A good acoustic contact between the pipe and the trans-
ducers is obtained as follows:
• Clean the pipe at the selected measuring point.
• Remove rust or loose paint. An existing paint layer on the pipe should be smoothed for a better measuring result.
• 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 and the pipe wall.
• Make sure that the transducer mounting exert the necessary pressure on the transducers.
7.2 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. 7.1). The
transducer cables show in opposite directions.
For the determination of the flow direction see section 9.8.
7.3 Installation with Variofix C
When measuring in reflection arrangement, one transducer mounting fixture is mounted on the side of the pipe (see Fig.
7.2).
When measuring in diagonal arrangement, two transducer mounting fixtures are mounted on the opposite sides of the
pipe (see Fig. 7.3).
In the following, the installation of one transducer mounting fixture is described (transducers in reflection arrangement).
Overview of the mounting steps
• step 1
disassemble the transducer mounting fixture Variofix C
• step 2
mount the tension straps (with or without clasp) and fix the rail to the tension straps with screws
• step 3
insert the transducers into the rail and fix them
• step 4
screw the cover onto the rail
Fig. 7.1: Correct orientation of the transducers and transducer distance
Fig. 7.2: Transducer mounting fixture Variofix C
(reflection arrangement)
Fig. 7.3: Transducer mounting fixture Variofix C
(diagonal arrangement)
transducer distance