Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 75)

Rev. 8/02 -4. 8- TFXM
??
Short Pulse Duration is a function used on pipes larger than
8 inches [200 mm]. Set this value to zero to disable the
function. Do not select the Auto Short Pulse box.
??
Flow Filter Damping establishes a maximum adaptive filter
value. Under stable flow conditions (flow that varies less than
the Flow Filter Hysteresis entry) this adaptive filter will
increase the number of successive flow readings that are
averaged together up to this maximum value. If flow changes
outside of the Flow Filter Hysteresis window, the Flow Filter
adapts by decreasing and allows the meter to react faster.
Increasing this value tends to provide smoother steady-state
flow readings and outputs.
??
Flow Filter Hysteresis creates a window around the average
flow measurement reading whereby if the flow varies within
that window, greater Flow Filter Damping will occur. The
filter also establishes a flow rate window where measurements
outside of the window are captured by the Bad Data
Rejection Filter. The value is entered as a percentage of
actual flow rate.
Figure 4.7
Advanced Tab