
Commissioning
FLOWSIC600 · Technical Information · 8010125 V 4.0 · © SICK AG
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Table 20
System warnings
Monitored
measurement
Configurable User
Warning parameters
Default
value
Notes
Default
activation
state
1
Profile factor
2
Profile factor
valid value
1.11
The profile factor represents the path velocity ratios of inner to
outer paths. A User Warning is generated when the profile
factor value calculated from the current path velocities
(v1..v4) deviates from the "Profile factor valid value" by more
than the allowed "Profile factor range".
The usage of a flow conditioner improves and stabilizes the
flow profile and results in well-defined values for profile factor
and symmetry, so that the default values may be applied. In
installations without flow conditioner, the values for the
parameters "Profile factor valid value" and "Profile factor
range" may significantly differ from the defaults.
A change of the symmetry value may be caused by contamina-
tion, blockage or deposits in the line that change the symmetry
of the flow profile.
When the application is operating under normal conditions,
try to observe, how the Profile factor changes within the
operating range (VOG between Qmin and Qmax).
From these observations useful values can be concluded for
"Profile factor valid value" and "Profile factor range".
Off
Profile factor
range
5%
Symmetry
Symmetry
valid value
1.00
The symmetry represents the path velocity ratios of upper to
lower paths. If the symmetry value calculated from the current
path velocities (v1..v4) deviates from the "Symmetry valid
value" more than allowed by the "Symmetry range", a User
Warning is generated.
The usage of a flow conditioner improves and stabilizes the
flow profile and results in well-defined values for profile factor
and symmetry, so that the default values may be applied. In
installations without flow conditioner, the values for the
parameters "Symmetry valid value" and "Symmetry range"
may significantly differ from the defaults.
A change of the symmetry value may be caused by contamina-
tion, blockage or deposits in the line that change the symmetry
of the flow profile.
When the application is operating under normal conditions,
try to observe, how the Symmetry changes within the
operating range (VOG between Qmin and Qmax).
From these observations useful values can be concluded for
"Symmetry valid value" and "Symmetry range".
Off
Symmetry
range
5%
v2
v3
+
v1
v4
+
-------------------
=
v1
v2
+
v3
v4
+
-------------------
=