Aalborg DFM Digital - Manual (Page 26)

Mode Run/Stop - Allows the user to Enable/Disable Flow Alarm
Low Alarm - The value of the monitored Flow in % F.S. below which is
considered an alarm condition.
Note: The value of the Low alarm has to be less then the
value of the High Alarm.
High Alarm - The value of the monitored Flow in % F.S. above which is
considered an alarm condition.
Note: The value of the High alarm has to be more then the
value of the Low Alarm.
Action Delay - The time in seconds that the Flow rate value must remain
above the high limit or below the low limit before an alarm
condition is indicated. Valid settings are in the range from
0 to 3600 seconds.
Note: If the alarm condition is detected, and the Relay is assigned to
Alarm event, then the corresponding Relay will be energized.
The user can enable and configure Temperature and Pressure Alarms via the
similar menu:
Main Menu " Alarm Settings " Temp. Alarms - For Temperature Alarm
Main Menu " Alarm Settings " Pres. Alarms - For Pressure Alarm
Note: High and Low limits for the Temperature Alarm have to be
entered in
F C. High and Low limits for the Pressure Alarm have to be
entered in the currently set engineering units: PSI or kPa (absolute).
P (absolute) = P (gauge) + P (atmospheric).
5.3.8 Relay Assignment Settings
Two sets of dry contact relay outputs are provided to actuate user supplied equip-
ment. These are programmable via local keypad or digital interface such that the
relays can be made to switch when a specified event occurs (e.g. when a low or
high flow, pressure or temperature alarm limit is exceeded or when the totalizer
reaches a specified value).
From the Main Menu, the user would traverse the menu tree until reaching the
"Relay Action" menu. The following screen will appear:
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