8 Installation of the Transducers FLUXUS F808, F809
UMFLUXUS_F808_8091V1-2-1EN, 2019-08-23 93
8Installation of the Transducers
8.5 Transducer mounting fixture PermaFiX
For measurements in Class I, Division 1 hazardous locations, the transducer mounting fixture PermaFiX (see Fig. 7.1) has
to be used for the installation of the transducers.
When measuring in reflection arrangement, the transducers are installed on the same side of the pipe. If the transducer
distance is small, both transducers are mounted into one rail. If the transducer distance is large, it can be necessary to
mount two transducer mounting fixtures (one for each transducer) on the same side of the pipe.
When measuring in diagonal arrangement, the transducers are installed on opposite sides of the pipe.
The transducer mounting fixture PermaFiX can be installed on the pipe using bolts (see section 8.5.3) or tension straps
(see section 8.5.4). Select the mounting instructions correspondingly. It is recommended to use bolts for the installation of
PermaFiX on pipes with a diameter of max. 40 mm and tension straps for larger pipes.
8.5.1 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.
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:
– If present, the paint layer has to be smoothed by sanding. The paint does not need to be removed completely.
– Remove any rust or loose paint.
8.5.2 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. 8.46).
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. 8.46)
Attention! Observe the "Safety and installation instructions for the use in hazardous (classified) locations" (see
documents SIFLUXUS_808_FM and SIFLUXUS_1N62).
Note! Take great care in selecting the measuring point for the installation of the transducer mounting fixture
PermaFiX. Observe the instructions in chapter 3 and 5.
Fig. 8.45: Disassembly of PermaFiX
Fig. 8.46: Correct orientation of the transducers and transducer distance
tensioning screw
cover
rail
slots for the tension strap
holes for the bolts
transducer
transducer distance
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