Technical data

Configure reverse flow alarm
Reverse flow alarm
Selecting Enable will configure the meter to generate a reverse flow alarm if it accumulates
more volume in the reverse direction than what is set in the Volume limit.
For flow to be counted as reverse flow for this check, it must be flowing at a velocity about
Low flow limit. This low flow limit is different from the Volume cut-off threshold below
which flow in not counted as flow for volume accumulation. Every time the flow direction
changes from forward to reverse, the reverse flow accumulated volume is reset to zero.
If the meter is a bi-directional meter, this alarm should not be enabled in order to avoid this
alarm becoming active during periods of expected reverse flow.
Alarm limits are specified by the reverse flow volume limit (ReverseFlowVolLmt data
point) and by the reverse flow detection zero flow cutoff (ReverseFlowDetectionZeroCut
data point).
Enable the checkbox on the Field Setup Wizard - General page to generate this alarm.
Note
You must have a valid ContinuousFlowAnalysisKey for this feature.
Reverse flow alarmFigure 4-16:
Daniel Liquid Ultrasonic Flow Meters calibration and configuration parameters
Operations 57