Dwyer Series PUF - Manual (Page 20)

3: Operating Procedures
16
Note: The SENSOR SELECTION menu can be entered by use of the Up/Down scroll keys. This allows the
type and mode of the sensors being used to be selected. This menu will be entered automatically if the
entered pipe OD and/or temperature are not valid for the currently selected sensors.
Note: Do not press the ENTER key until the transducers are fitted and connected to the instrument.
Attaching and connecting the transducers
18. Fit the designated sensors to the pipe using the appropriate transducer holder as described in Paragraph 2.2.
Take great care to set the separation distance as accurately as possible.
19. Connect the red and blue coaxial cables between the sensors and the test instrument, ensuring that the red
connector on the instrument is connected to the ‘upstream’ sensor.
Taking a flow reading
15. The SENSOR SEPARATION screen now displays
a summary of the entered parameters and
informs you of the type of sensor to be used, the
mode of operation and the distance to set up
between the sensors.
In this example it recommends type
B-ST (B
standard) sensors operating in the ‘ Reflex’
mode spaced at 3.62 Inches apart.
Take a note of these details.
SENSOR SEPARATION DD-MM-YY HH:MM:SS
Site : Quickstart
Pipe : 6.50 Inches
Wall : 0.50 Inches
Sensors : B-ST Reflex
Temperature : 10.00°C 50.00°F
Set sensor separation to 3.62 Inches
Press
to continue, UV to select sens.
16. Take a note of the displayed parameters, then
press the ENTER key.
17. The ATTACH SENSORS screen displays, giving
instructions to attach the sensors.
ATTACH SENSORS DD-MM-YY HH:MM:SS
Attach Sensor Set
Red Connector UpStream
Press key to go to Flow Reading
20. Once the transducers have been fitted and
connected, press the ENTER key from the
ATTACH SENSORS screen.
21. This will take you to the FLOW READING screen
via a signal-checking screen (shown here).
Please wait..
Checking signals
****************************************
* *
****************************************
22. Check that the indicated signal strength on the
left of the screen is 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 it could be
due to an application problem.
23. Qxx.xx% indicates the signal quality and should
have a value of 60% or greater.
FLOW READING DD-MM-YY HH:MM:SS
Qxx.xx%
Signal
gal/min
+Total: 0.00 gal
–Total: 0.00 gal
0.000