Dwyer UFB - Manual (Page 24)

3: Operating Procedures
20
Taking a flow reading
22. Once the transducers have been fitted and
connected, press the ENTER key twice.
23. This will take you from the SENSOR
SEPARATION screen to the FLOW READING
screen via the signal-checking screen (shown
here).
24. Check that the indicated signal strength on the
left of the screen shows at least 2 bars (ideally
3 or 4). If less than 2 bars are shown it indicates
there could be a problem with the transducer
spacing, alignment or connections; or an
application problem.
25. Qxx.xx% indicates the signal quality and
should have a value of 60% or greater.
Flow monitoring
The FLOW READING screen is the one most used during normal monitoring operation. It shows the instantaneous
fluid flow together with totalized values (when enabled). In this mode you can select the flow rate measurement
units by pressing keys 7 (liters), 8 (Gallons, Barrels) or 9 (m³), or change the display to show velocity by pressing
key 4.
If the flow reading exceeds a value of +/-9999 in the current units, then a *10 multiplier will be displayed above
the units and the value displayed will be a tenth of the actual value. Similarly a * 100 and *1000 may be displayed
on very large flow rates.
Once a valid flow reading is obtained, if the pipe conditions change (such that the flow reading is lost) then the
system will automatically rescan to re-establish a stable flow reading. It is important that the instrument is left with
the
FLOW READING screen on the display because the automatic rescan is disabled if any of the other screens
that can be reached from the FLOW READING screen are being displayed.
Note: There will be a delay in the keyboard response if a rescan is in progress when a key is pressed.
Please wait..
Checking signals
****************************************
* *
****************************************
FLOW READING * *
Qxx.xx%
Signal
gal/min
+Total: 0.00 gallons
–Total: 0.00 gallons
0.000