Publicité
Appendice
D Auto-surveillance et diagnostic (NAMUR NE 107)
Tab. D.2 : Aperçu général des événements prédéfinis
ID
catégorie
message
6.08
M
Max. gain of a sound path nearly exceeded
6.09
F
Max. gain of a sound path exceeded
6.10
M
Signal-to-noise ratio of a sound path low
6.11
F
Signal-to-noise ratio of a sound path too low
6.12
M
Signal-to-correlated-noise ratio of a sound
path low
6.13
F
Signal-to-correlated-noise ratio of a sound
path too low
6.14
M
Signal quality of a sound path low
6.15
F
Signal quality of a sound path too low
6.20
M
Measured sound speed of a sound path low
6.21
F
Measured sound speed of a sound path
too low
6.22
M
Measured sound speed of a sound path high
6.23
F
Measured sound speed of a sound path
too high
226
action
1. Check transducer coupling (coupling foil)
2. Deposits on inner pipe wall: check measurement
arrangement
3. Fluid damping: check multiphase issues
4. Gas: check min. fluid pressure
1. Check transducer coupling (coupling foil)
2. Deposits on inner pipe wall: check measurement
arrangement
3. Fluid damping: check multiphase issues
4. Gas: check min. fluid pressure
1. Check gain
2. Check electrical connection, shielding and grounding
of transducers
3. Check for acoustic noise at measuring point
1. Check gain
2. Check electrical connection, shielding and grounding
of transducers
3. Check for acoustic noise at measuring point
1. Check gain
2. Check for pipe noise damping
3. Check for acoustic noise at measuring point
1. Check gain
2. Check for pipe noise damping
3. Check for acoustic noise at measuring point
1. Check transducer distance
2. Correlation factor of upstream and downstream signal
low. Check for gain, SNR, SCNR, max. flow velocity.
1. Check transducer distance
2. Correlation factor of upstream and downstream signal
too low. Check for gain, SNR, SCNR, max. flow velocity.
1. Check selected fluid
2. Check temperature
3. Check pressure
4. Check measurement arrangement
1. Check selected fluid
2. Check temperature
3. Check pressure
4. Check measurement arrangement
1. Check selected fluid
2. Check temperature
3. Check pressure
4. Check measurement arrangement
1. Check selected fluid
2. Check temperature
3. Check pressure
4. Check measurement arrangement
2023-10-01, UMFLUXUS_F831V1-4FR
FLUXUS F831
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