6 Mounting
FLUXUS G831ST-HT
6.2 Transducers
27
UMFLUXUS_G831ST-HTV1-0EN, 2021-06-01
6.2.1.2
Pipe preparation
Rust, paint or deposits on the pipe absorb the sound signal. A good acoustic contact between the pipe and the
transducers is obtained as follows:
• Clean the pipe at the selected measuring point.
– If present, the paint layer has to be smoothed by grinding. The paint does not need to be removed completely.
– Remove any rust or loose paint.
• Install the damping mats.
6.2.1.3
Measurement arrangement
The transducer pairs of both the measuring barriers are each mounted in diagonal arrangement with 1 sound path in the
same sound beam plane.
If the measuring point is situated near an elbow, the following measurement arrangements are recommended for the
selection of the sound beam plane.
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 applicable rules.
Important!
The pipe has to be sufficiently stable to withstand the pressure exerted by the transducers and the fasteners.
Notice!
Observe the selection criteria of pipe and measuring point.
Vertical pipe
Horizontal pipe
• The sound beam plane is selected at an
angle of 90° to the elbow plane. The
elbow is upstream of the measuring
point.
• The sound beam plane is selected at an
angle of 90° ± 45° to the elbow plane.
The elbow is upstream of the measuring
point.
elbow plane
flow
direction
flow direction
elbow plane
