Dynasonics MFX Series Insertion MagProbe Flow Meter - Manual (Page 57)

Rev. 01/11
-4.5- MFX
x MAX Flow is used by the MFX to establish filter settings in its
operating system. Enter a flow rate that is the maximum, positive
flow rate anticipated within the system.
x The Damping value is increased to increase stability of the flow
rate readings. Damping values are decreased to allow the flow
meter to react faster to changing flow rates.
x Low Flow Cutoff is entered as a percentage between MAX
Flow and MIN Flow and influences how the flow meter will act at
flows very close to zero. Generally, an entry of 1% provides for a
stable zero indication, while providing a 100:1 turndown ratio for
measurements.
x Low Signal Cutoff does not pertain to the MFX product.
x Substitute Flow is used to provide an indication and output that
signifies that an error exists with the flow meter or its setup. It is
set as a percentage between MIN Flow and MAX Flow. In a
unidirectional system this value is typically set to zero, to
indicate zero flow while in an error condition. In a bi-directional
system, the percentage can be set such that zero is displayed in
an error condition. To calculate where to set the Substitute Flow
value in a bi-directional system, perform the following operation:
PART 4 - SOFTWARE UTILITIES
Exponent Display Multiplier
E-1
0.1 (decimal is moved on display)
E0
1 (no multiplier)
E1
10
E2
100
E3
1,000
E4
10,000
E5
100,000
E6
1,000,000
TABLE 4.1
Totalizer Exponent Values
( )
Substitute Flow = 100
—
100
× MAX Flow
MAX Flow
— MIN
Flow