AVF7000 Operation Manual
OP7000.1.1.7.R12ENG
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13. Commonly Seen Problems
1. Vortex displays flow rate when valve is closed.
①
If frequency is detected to be 50hz or 60hz, it means grounding needs to be checked. AVF7000 demands high in
grounding such as the position, stairs or railing to eliminate interference signals. Try to avoid vortex’s cable share
the same grounding terminal with those of other devices or intertwined together. Built up a remote grounding pole
for vortex if conditions are permitted.
②
Huge pipe vibration. If vibration exceeds vortex’s bear ability, please reinforce its installation position or add a
hose terminal to reduce vibration.
③
Strong-current equipment or strong interference around.
④
Big amplification. Try to reduce it if necessary.
2. Vortex displays 0 when flow is running in pipe.
①
Actual flow rate in pipe is too low. Please increase it to make sure it reaches vortex’s min. measurement value.
②
Small amplification. Try to increase it if necessary.
③
If measuring medium is steam, please make sure actual temperature&pressure parameters are conformed with
those inside circuit board.
④
Circuit board or sensor is faulted. Please send them back to ALIA for repair.
3. Vortex’s flow rate is unstable.
①
Actual flow rate is unstable.
②
Huge pipe vibration. If vibration exceeds vortex’s bear ability, please reinforce its installation position or add a hose
terminal to reduce vibration.
③
Small amplification, try to increase it if necessary.
4. Vortex’s displayed flow rate deviates a lot with actual flow rate.
①
Installation direction is wrong. Make sure vortex is installed as the direction indicated in its body.
②
Installation is not concentric. Make sure vortex is installed concentric and use tools if necessary.
③
Gasket is not suitable. Its internal size is smaller than that of pipe or it slide into pipe, leading to turbulence. Make
sure gasket is proper.
④
If measuring steam, when process temperature or process pressure changes, please make sure whether
Temperature&pressure inside vortex is conformed to actual process temperature&pressure.
⑤
K factor is wrong. New K factor=(Display flowrate/Actual flowrate)*K(original)
