LRF-3000S Ultrasonic Transit-time Flow meter
- 30 -
The damping factor ranges from 1 ~ 999 seconds.1
indicates no damping; 999 indicates the maximum
damping.
The damping function will stabilize the flow
display.
Usually a damping factor of 3 to 10 is recommended
in applications.
M21
Low Vel. Cut off
Low Flow Cut off is used to make the system
display as "0" value at lower and smaller flows to
avoid any invalid totalizing. For example, if the
cutoff value is set as 0.03, system will take all the
measured flow velocity values from - 0.03 to + 0.03
as "0". Generally, 0.03 is recommended in most
applications.
M22
Zero Settings
When fluid is in the static state, the displayed value
is called "Zero Point". When "Zero Point’ is not at
zero in the flow meter, the difference is going to be
added into the actual flow values and measurement
differences will occur in the flow meter.
Set zero must be carried out after the transducers are
installed and the flow inside the pipe is in the
absolute static state (no liquid movement in the
pipe). Thus, the "Zero Point" resulting from
different pipe mounting locations and parameters
can be eliminated. The measuring accuracy at low
flow is enhanced by doing this and flow offset is
eliminated.
Select "YES"; reset "Zero Point" which was set by
the user.
This method is not commonly used. It is only
suitable for experienced operators to set zero under
Value
6
M20
Damping
*R
Value
0.03
m/s
M21
Low Vel. Cutoff
*R
M22
Zero Settings
*R
Cutoff
Reset
Offset
Option
0.No
M22
Zero Settings
*R
Option
0.No
Cutoff
Reset
Offset
