Aalborg DFM Digital User Manual

Page 17

5.3

Programming DFM using LCD and Keypad

All features of the flow meter can be accessed via the local four button keypad and
LCD.The LCD incorporates an energy-saving auto shut-off backlit feature. If
enabled, after 15 minutes of operation without user intervention the LCD backlit
turns off. In order to turn on the LCD backlit press any key on the keypad. The LCD
backlit energy-saving auto shut-off feature can be disabled or enabled by user (see
p. 5.3.12 "LCD backlit Energy-saving Setting").

5.3.1 Changing Units of measurement for

Temperature and Pressure reading

By default after power up the temperature reading is displayed in

F and pressure

in PSI. Pressing (

u) [Enter] button from main screen will alter the units of meas-

ure to

C for temperature and kPa for pressure reading respectively. In order to

change units of measure back to

F for temperature and PSI for pressure press

(

u) [Enter] button while in the main screen one more time.

5.3.2 Monitoring DFM Peripheries Settings

The last row at the bottom of the main LCD screen reflects settings and status for
Totalizer, Flow Alarm, and Relays (see Figure b-2).

Totalizer Status:

TOT: R - totalizer is running (Enabled).
TOT: S

- totalizer is stopped (Disabled).

Flow Alarm Status:

A: S

- flow alarm is disabled.

A: R,N - flow alarm is enabled and currently there are no alarm conditions.
A: R,L

- flow alarm is enabled and currently there is Low alarm condition.

A: R,H - flow alarm is enabled and currently there is High alarm condition.