20 FLOWSIC100 Flare-XT · Operating Instructions · 8023761/V 1-0/2020-10 · © SICK Engineering GmbH
System description
3. 5
ASC technology (patented) – active sound correlation technology
(optionally available)
If the ultrasonic signal is scattered due to extreme gas velocity, the ASC technology (active
sound correlation technology) takes over.
The ultrasonic transducer works like a microphone and correlates the strong noises at high
flow rates to gas velocity.
This ensures measurement is still available even for extreme flare gas behavior.
Measurement uncertainty is higher as compared to ultrasonic transit time difference
measurement, see technical data,
p. 153, §12.
Fig. 3 ASC technology
“Extended VOG Range” is signalled in the path status of FLOWgate
TM
when the ASC
technology is active.
Fig. 4 Signaling “Extended VOG Range” in the path status
Normal conditions,
Ultrasonic transit time difference
measurement
Increased gas velocity,
Ultrasonic transit time difference
measurement
Scattered ultrasonic signal,
ASC technology active
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