Dynasonics MFX Series Insertion MagProbe Flow Meter - Manual (Page 41)

Rev. 01/11
-3.7- MFX
FL C-OFF -- Low Flow Cut-off
Percent of MAX RATE
A Low Flow Cut-off entry is provided to allow very low flow rates
(that can be present when pumps are off and valves are closed) to
be displayed as Zero flow. Typical values that should be entered are
between 1.0% and 5.0% of full-scale.
DAMP PER -- System Damping
Relative Percent Entry
DAMP PER establishes a maximum adaptive filter value. Under
stable flow conditions (flow that varies less than ±5%) 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 ±5% window, the Flow Filter adapts by decreasing
and allows the meter to react faster. A minimum filter setting is
established with the MIN DAMP setting described below. DAMP
PER is usually set to a value that is equal to or greater than MIN
DAMP. Increasing this value tends to provide smoother steady-state
flow readings and outputs.
MIN DAMP -- System Damping
Relative Percent Entry
In installations where very turbulent or erratic flow is encountered,
increasing the MIN DAMP setting can increase display and output
stability by forcing more averaging of flow readings. This filter is not
adaptive, so increasing this setting will decrease the response time
of the instrument to all changes in flow rate. MIN DAMP is usually
set to a value that is equal to or less than DAMP PER.
PART 3 - KEYPAD CONFIGURATION
Minimum
System
Damping
System
Damping
Low Flow
Cut-off