Aalborg DFM Digital - Manual (Page 22)

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Note: By default the DFM is shipped with at least one valid calibration
table (unless optional additional calibrations were ordered). If instead of
the valid Gas Name (for example NITROGEN) the main screen displays
Gas designator as "Uncalibrated", then user have chosen the gas table
which was not calibrated. Using an Uncalibrated Gas Table will result
in erroneous reading.
From the Main Menu, the user would traverse the menu tree until reaching the "Gas
Table Select" menu. The following screen will appear:
Figure b-8, Current Gas Table Settings
Use (
p) or (q) buttons to select desired Gas Table, press the (u) [Enter] button
when done. The LCD will display the Main Menu screen. If desired, press the (
t)
[Esc] button to go back to the Main DFM screen. The new gas table number and
the name of the gas will be reflected on the Main DFM screen.
5.3.6 Totalizer Settings
The total volume of the gas is calculated by integrating the actual gas flow rate with
respect to time. Both keypad menu and digital interface commands are provided
to:
= set the totalizer to ZERO
= start the totalizer at a preset flow
= assign action at a preset total volume
= start/stop (enable/disable) totalizing the flow
= read totalizer
The Totalizer has several attributes which may be configured by the user. These
attributes control the conditions which cause the Totalizer to start integrating of
the gas flow and also specifying actions to be taken when the Total Volume is out-
side the specified limit.
,