6 Mounting
6.2 Transducers
FLUXUS G831ST-HT
2021-06-01, UMFLUXUS_G831ST-HTV1-0EN
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6
Mounting
6.2
Transducers
6.2.1
Preparation
6.2.1.1
Measuring point selection
The correct selection of the measuring point is crucial for achieving reliable measurement results and a high measurement
accuracy.
A measurement on a pipe is possible if:
• the ultrasound propagates with a sufficiently high amplitude
• the flow profile is fully developed
• the influence of noise is sufficiently low
The correct selection of the measuring point and the correct transducer positioning guarantee that the sound signal will be
received under optimum conditions and evaluated correctly.
Because of the variety of applications and the different factors that influence the measurement, there is no standard
solution for the transducer positioning.
The measurement is influenced by the following factors:
– diameter, material, lining, wall thickness and shape of the pipe
– fluid
• Avoid measuring points in the vicinity of distorted or defective areas of the pipe or in the vicinity of welds.
• Avoid measuring points with deposit formation in the pipe.
• Make sure the pipe surface at the selected measuring point is even.
• Select the location of the transmitter within the transducer cable range.
• The temperature at the measuring point has to be within the specific ambient temperature range of the transmitter and
the transducers, see technical specification.
If the measuring point is within an explosive atmosphere, possibly present danger zones and gases have to be
determined. The transducers and the transmitter have to be appropriate for these conditions.
Caution!
Warning of severe injuries from hot or cold components
Touching hot or cold components can lead to severe injuries (e.g., thermal damage).
→ Any mounting, installation or connection work has to be concluded.
→ Any work on the measuring point during the measurement is prohibited.
→ Observe the ambient conditions at the measuring point during installation.
→ Wear the required personal protective equipment.
→ Observe the applicable rules.
