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ting
Cause
No supply voltage
Reverse polarity
Signal line defective
Incorrect terminal assignment at
FML
Extreme external vibration
Extremely turbulent flow
Flow > 2 m/s
Buildup
Tuning fork blocked
Electronic insert defective
No connection to sensor
40
Display
Power supply/off
Check supply voltage
Check connection assignment
Check signal line
Check terminal configuration at
FML621
Troubleshooting
Display
Process situation unstable
Measuring point vibration isolation
Provide settling section
Remove tuning fork from direct medium flow
Remove buildup, provide cleaning interval.
Display
Maintenance required
Change installation position
Display
Device failure
Replace electronic insert
Replace sensor
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