CALIBRATION
Press the
È
to
>Calibration
and
Æ
to enter. Use
È
or
Ç
to position
>
before each menu item and
Æ
to enter. When settings are completed
press
ü
to store and return to the Calibration menu
*
20mA at
Press
Æ
then
È
or
Ç
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
Press
È
or
Ç
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).
Pipe ID
Place the cursor under the digits and then
È
or
Ç
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 20%.
Press
ü
from the
Units/Mode
display to return to Menu Selections.
*
Note
4-20mA circuitry is only powered by the AC power module.
To conserve power this output is not active in battery power mode.
Page 10
PDFM 5.0 Portable Doppler Flow Meter
--Calibration-------
>20mA at 2500.0 USG/m
4mA at
0.000 USG/m
Pipe ID
12.00in
Damping
20%
