Flexim FLUXUS WD, Operating Instruction

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3 General principles
3.2 Measurement arrangements
FLUXUS WD
2018-07-16, UMFLUXUS_WDV1-3EN
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3.1.4 Measurement of the flow velocity in the HybridTrek mode
The HybridTrek mode combines the TransitTime and the NoiseTrek mode. During a measurement in the HybridTrek
mode, the transmitter automatically toggles between the TransitTime and the NoiseTrek mode depending on the gaseous
or solid content.
The measurement arrangement is identical to the one in the TransitTime mode.
3.2 Measurement arrangements
3.2.1 Terms
Sound path
The distance covered by the ultrasonic signal after crossing the pipe once. The number of the sound paths is:
• odd if the measurement is carried out in diagonal arrangement
• even if the measurement is carried out in reflection arrangement
Beam
The path covered by the ultrasonic signal between the transducers, i.e., the transducer emitting the ultrasonic signal and
the transducer receiving it. One beam consists of 1 or several sound paths.
Diagonal arrangement Reflection arrangement
The transducers are mounted on opposite sides of the pipe. The transducers are mounted on the same side of the pipe.
Fig. 3.5: Diagonal arrangement with 2
beams and 3 sound paths Fig. 3.6: Reflection arrangement with 1
beam and 4 sound paths