Flexim FLUXUS F60 Series, Руководство по эксплуатации, Страница: 36 / 244

6 Installation
6.2 Transducers
FLUXUS F60*
2017-10-16, UMFLUXUSF60xV5-0EN
36
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 measure-
ment 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 correct selection of the measuring point and the correct transducer positioning guar-
antee that the sound signal will be received under optimum conditions and evaluated cor-
rectly.
Because of the variety of applications and the different factors that influence the mea-
surement, 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
– gas bubbles in the 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 ambient temperature at the measuring point has to be within the operating tem-
perature 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 appro-
priate for these conditions.
6.2.1.2 Pipe preparation
Caution!
Contact with grinding dust
This may result in injuries (e.g., breathing difficulties, skin reactions, eye
irritations).
→ Wear the required personal protective equipment. Observe the appli-
cable rules.