Diagnostic Events

The Process Events can be set in the Event Configuration.

By default no event is activated, so the message “Event disabled in configuration” is shown. If it is configured but no event is active, the message “No event active” is shown. In case of an event, the set message is displayed.

Process events meanings and conditions

Special event in the process	Meaning	Special condition
Not totally filled	The tube is not totally filled. If the parameter Refresh time is set to Very short, the event Not totally filled cannot be monitored.	Not all the sensors are in contact with the liquid.
Liquid out of range	The speed of sound in the liquid is out of range.	DN08, 3/8'', 1/2'': The speed of sound in the liquid is lower than 1000 m/s or higher than 2000 m/s. DN15 and above, 3/4'' and above: The speed of sound in the liquid is lower than 800 m/s or higher than 2300 m/s.
Unstable flow	The flow rate is not stable.	The standard deviation of the flow rate measurements is too high.
Low flow cut off	The cut-off value of the flow rate has been used.	The cut-off function must be enabled
Change of liquid	A different liquid flows in the pipe. The message is active for 10 s on the display.	The speed of sound in the liquid has changed by more than 3 m/s in 1 second.
Backward flow	The liquid flows in the opposite direction as the one set as positive direction of the flow.