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DFM 5.1 Doppler Flow Meter
CALIBRATION
Press the to Calibration and to enter. Use or to position before
each menu item and to enter. When settings are completed press to store and
return to the Calibration menu.
20mA
at
(5V Flo)
Press
then
or
to change the numbers and decimal point.
Use this menu to set the corresponding flow rate that will be
represented by 20mA analog output. If maximum flow is
unknown, enter an estimated flow rate and observe actual flow
to determine the correct maximum value. Any velocity or flow
rate up to +40 ft/sec (12.2 m/sec) may be selected.
4mA at
(0V Flo)
Press
or
to set the flow rate corresponding to 4mA analog
output. This setting may be left at zero flow (or velocity or can
be raised to any value less than the 20mA setting, or lowered to
any velocity or corresponding flow rate down to -40 ft/sec
(-12.2 m/sec).
Min Vel
Press
and enter a minimum velocity cutoff. Forward and
reverse velocities less than Min Vel will be forced to zero.
Pipe ID
Place the cursor under the digits and then
or
to change the
numbers and decimal point. Pipe ID should be entered as the
exact inside diameter of the pipe where the sensor is mounted.
Refer to the Pipe Charts Appendix in this manual for inside
diameter of common pipe types and sizes.
Damping
Increase damping to stabilize readings under turbulent flow
conditions. Decrease for fast response to small changes in flow.
Damping is shown in percentage (maximum is 99%). Factory
default is 10%.
Press to return to Menu Selections screen.
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