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FLOWSIC600 · Technical Information · 8010125 V 4.0 · © SICK AG
Troubleshooting
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Table 25
Interpretation of active User Warning status
Yellow light
for...
Possible causes
Actions
Profile factor
1
A change of the symmetry value may be caused
by contamination, blockage or deposits in the
line that change the symmetry of the flow profile.
Compare the current value with previous
measurements (e.g. Maintenance Report
from commissioning) and check whether the
User Warning limit is configured correctly
(
Create a Diagnosis Session according to
and contact your trained staff.
Symmetry
A change of the symmetry value may be caused
by contamination, blockage or deposits in the
line that change the symmetry of the flow profile.
Compare the current value with previous
measurements (e.g. Maintenance Report
from commissioning) and check whether the
User Warning limit is configured correctly
(
Create a Diagnosis Session according to
and contact your trained staff.
Theoretical
(SOS) deviation
A deviation of the measured Speed of Sound
(SOS) from the theoretical SOS may be caused
by:
– asynchronous determination of the
measured and the theoretical SOS due to
fluctuations in gas composition and analysis
time lag,
– malfunction of the pressure measurement,
– malfunction of the temperature
measurement,
– malfunction of the gas composition
measurement,
– malfunction of the meter,
– or deposits on the transducer(s) or meter
body which change the path length.
Check the theoretical SOS for plausibility
using the SOS calculator -> see Maintenance/
Routine Checks / Comparing theoretical and
measured Speed of Sound (SOS)
Check the updating cycle between meter and
the device transmitting the theoretical SOS
Check the pressure and the temperature
measurement for plausibility or errors
Create a Diagnosis Session according to
and contact your trained staff.
High gas
velocity
The current average Velocity of Gas exceeds the
value "VOG limit".
The VOG limit should be configured to suit
your application.
Low input
voltage (power
supply)
The power supply voltage is below the value
"Input voltage warning" and may indicate a
potential problem of the power supply (e.g. low
battery status of solar powered system).
Check the power system
1
These User Warning limits are only monitored, as long as certain preconditions are met (