Aalborg TIO Totalizer I/O Flow Monitor/Controller - Manual (Page 30)

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a) Flow Alarm Mode (Tabular entry)
This function determines whether the Flow Alarm is Enabled or Disabled.
The following selections are available: Enabled or Disabled. The default
entry is Disabled. Alarm Mode selections can be set with the UP and DN
buttons and are accepted by pressing ENT button.
b) Low Flow Alarm (Numerical entry)
The limit of required Low Flow Alarm value can be entered in increments
of 0.1% from 0 - 100%F.S.
If a Low Alarm occurs, and one of the two optical outputs is assigned to the Low Flow
Alarm Event (see paragraph 5.3.10) the optically-isolated output will be activated:
• For Flow Meter function: when the flow is less than the Low Flow
Alarm value.
• For Flow Controller function: when the absolute difference between
Set Point value and actual flow reading is equal to or higher than the
Low Flow Alarm value and Actual Flow value is less than Set Point
value.
The Low Flow Alarm condition is also indicated on the corresponding Process
Information Screen by displaying L character.
c) High Flow Alarm (Numerical entry)
The limit of required High Flow Alarm value can be entered in increments
of 0.1% from 0 - 100% F.S. If a High Alarm occurs, and one of the two
optical outputs is assigned to the High Flow Alarm Event (see paragraph
5.3.10) the optically-isolated output will be activated for:
• Flow Meter function: when the flow is more than the High Flow Alarm
value.
• Flow Controller function: when absolute difference between Set Point
value and Actual Flow reading is equal to or higher than the High Flow
Alarm value and actual flow value is more than set point value.
The High Flow Alarm condition is also indicated on the corresponding Process
Information Screen by displaying the H character.
NOTE: For Flow Meter function the value of the Low Flow Alarm must
be less than the value of the High Flow Alarm.
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