112 CoriolisMaster FCB400, FCH400 CORIOLIS MASS FLOWMETER | OI/FCB400/FCH400-EN REV. E
… 9 Operation
… Parameter descriptions
Menu: Process Alarm
Menu / parameter Description
Process Alarm
Clear Alarm History Reset of the alarm history.
...Group Masking Selection of submenu ‘...Group Masking’ using .
...Alarm Limits Selection of submenu ‘...Alarm Limits’ using .
Process Alarm / ...Group Masking
Maintenance Required Alarm messages are divided into groups.
If masking is activated for a group (On), no alarm is issued.
For further information, see chapter Diagnosis / error messages on page 131.
Function Check
Out Of Specification
Process Alarm / ...Alarm Limits
Qm Massflow Min Sets the minimum / maximum limit value for mass measurement. If the process value ‘Mass Flow [unit]’ exceeds or falls
below the limit value, an alarm is triggered.
Qm Massflow Max
Qv Volumeflow Min Sets the minimum / maximum limit value for volume measurement. If the process value ‘Volume Flow [unit]’ exceeds or falls
below the limit value, an alarm is triggered.
Qv Volumeflow Max
Density Min Sets the minimum / maximum limit value for density measurement. If the process value ‘Density [unit]’ exceeds or falls
below the limit value, an alarm is triggered.
Density Max
Temperature Min Sets the minimum / maximum limit value for sensor temperature. If the process value ‘Temperature [unit]’ exceeds or falls
below the limit value, an alarm is triggered.
Temperature Max
Concentrat. [%] Min Sets the minimum / maximum limit value for concentration measurement. If the process value ‘Concentr.unit [%]’ exceeds
or falls below the limit value, an alarm is triggered.
Concentrat. [%] Max
Concentrat. [u] Min Sets the minimum / maximum limit value for concentration measurement. If the process value ‘Concentr.unit [unit]’ exceeds
or falls below the limit value, an alarm is triggered.
Concentrat. [u] Max
Driver Output Max Sets the maximum limit value for driver current.
If the driver current exceeds the limit value for the time set under the parameter ‘Driver Output Time’, an alarm is triggered.
Driver Output Time Sets the delay time for alarm ‘Sensor driver current to high.’.
Sensor Signal Min Sets the maximum limit value for the sensor amplitude.
If the sensor amplitude exceeds the limit value for the time set under the parameter ‘Sensor Signal Time’, an alarm is
triggered.
Sensor Signal Time Sets the delay time for alarm ‘Sensor amplitudeout of range.’.
Density Low Check Sets the alarm limit for the density alarm.
If the density falls below the value set, process variables Qm and Qv are set to ‘0’ and alarm ‘Density to 1g/cm³’ is triggered.
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