6 Installation
FLUXUS G809
6.2 Transducers
37
UMFLUXUS_G809V2-2EN, 2020-06-25
6.2.3
Installation of the transducers
6.2.3.1
Orientation of the transducers and determination of the transducer distance
Observe the orientation of the transducers. If the transducers have been mounted properly, the engravings on the trans
-
ducers form an arrow, see Fig. 6.10. The transducer cables show in opposite directions.
The transducer distance is measured between the inner edges of the transducers.
• Select the installation instructions that correspond to the supplied transducer mounting fixture.
Example
measurement in diagonal arrangement
2 transducer mounting fixtures Variofix C
transducer with transducer frequency G
width of damping mat: 225 mm
outer pipe diameter: 1200 mm
length of Variofix C: 560 mm
reflection points: 2
calculation of the mounting length, see Tab. 6.2:
transducer damping mat: l
S1
= 600 mm
pipe damping mat: l
R
= 600 mm (2 ×)
The total mounting length is 1800 mm.
Fig. 6.9:
Outer pipe diameter > 900 mm
1 – transducer damping mats
2 – pipe damping mats
3 – reflection point
The transducer damping mats are mounted lengthwise on the pipe. The pipe damping mats can be mounted on the pipe
lengthwise or crosswise. In the example, they are mounted crosswise.
Number of transducer damping mats
The transducer damping mats are mounted along the pipe circumference with a width of 2 × 1400 mm.
The number of transducer damping mats is 2 × 1400 mm/225 mm = 2 × 6.2.
2 × 6 damping mats (600 mm × 225 mm) + 2 × 1 damping mat (600 mm × 50 mm)
Number of pipe damping mats
The pipe damping mats are mounted along the entire pipe circumference.
pipe circumference: 2πr = 3770 mm
The number of pipe damping mats is 2 × 600 mm / 225 mm = 2 × 2.7. The value is rounded up.
2 × 3 pipe damping mats (3770 mm × 225 mm)
The damping mats can be cut into smaller pieces to make mounting easier.
Fig. 6.10: Orientation of the transducers and transducer distance
a – transducer distance
2
l
R
3
1 2
3
l
R
l
S1
a
