KROHNE ALTOSONIC V EN - Manual (Page 18)

ALTOSONIC V
Operating Manual rev02 E 7.30850.34.00 Page 18 of 106
4.2 Main menu: F2 Alarms window
The Alarm window shows all alarms and warnings as occurred [seconds].
Explanation of the Alarms window layout:
CHANNEL ERROR shows:
There are 5 types of errors
1. OOR, Out Of Range, flow data from the UFC is out of the limits – 125...+125% flow rate.
Possible causes are:
•
Flow out of range
•
Empty pipe
• Problem with sensor
• Problem with converter
Common check is: Value of the proces flowrate
2. PATH, Path failure. The transmitted signal from one sensor in the path is not correctly received by
the other sensor in the path..
Possible causes are:
•
Empty pipe
•
Particles or solids in the fluid
• Cavitation due to low proces pressure resulting in gas bubbles
•
Problem with converter
Common checks are:
•
Proces pressure
• Value of the proces flow rate
3. DEV.C, Deviation in sound velocity
The UFP calculates the mean sound velocity out of the three most nearby channel values (5 times)
and then checks all channels on their deviation to this mean value