Dwyer UFB - Manual (Page 23)

3: Operating Procedures
19
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
A-ST (A
standard) sensors operating in the ‘ Reflex’
mode spaced at 3.62 Inches apart.
Take a note of these details.
Selecting the operating mode
On large pipes using either type ‘B’ or ‘D’ sensors it may be necessary to use the ‘Diagonal’ mode of operation
rather than the ‘Reflex’ mode. The system will automatically select ‘Reflex’ mode if it is valid, but the mode can be
changed using the following steps.
16. When in the SENSOR SEPARATION screen, press either the Up or Down arrow keys. This will display the
SENSOR SELECTION menu.
17. Scroll down to Sensor mode and press ENTER.
18. Scroll to the required mode and press ENTER.
19. Select Exit and press ENTER, to return to the SENSOR SEPARATION screen.
20. The correct sensor separation distance for the selected mode will now be displayed.
Note: Do not press ENTER (to continue with the operating procedure) until the transducers are fitted and
connected to the instrument.
Password Control
After data has been entered for the first time, the UFB password control feature is ‘enabled’ when you exit from
Quick start to the FLOW READING screen. This prevents unauthorized tampering of the set-up data. Once
‘enabled’, a password control box is displayed if any key is pressed and you must then enter 71360 to ‘disable’
the password control and gain access to any of the menus.
Note: Once disabled, the password control feature is re-enabled if no keys are pressed for five minutes.
Attaching and connecting the transducers
21. Fit the designated sensors to the pipe using the transducer holder as described in Paragraph 2.3.2. The
separation distance must be set to within ±0.02 inches.
Key Point: The above example shows the spacing required using a standard type
‘A’ probe set (A-ST), as supplied with the model UFB-A.
SENSOR SEPARATION * *
Site : Quickstart
Pipe : 6.50 Inches
Wall : 0.50 Inches
Sensors : A-ST Reflex
Temperature : 5.00°C 41.00°F
Set sensor separation to 3.62 Inches
Press
to continue, UV to select sens.