Dwyer UFC User Manual download pdf (Page 25)

3: Operating Procedures

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 UFC 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.

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

Please wait..

Checking signals

****************************************

* *

****************************************

FLOW READING DD-MM-YY HH:MM:SS

Qxx.xx%

Signal

gal/min

+Total: 0.00 gallons

–Total: 0.00 gallons

0.000

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Dwyer UFC User Manual Page 25

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