Aalborg PWE Digital - Manual (Page 43)

If a High Temperature Alarm occurs, and one of the two optical outputs is assigned
to the High Alarm Event (see Section 4.8) the optically isolated output will be acti-
vated when the flow is more than the High Temperature Alarm value.
The Temperature Alarm condition is also indicated on the display Process
Information Screen by displaying H character. A typical display with flow meter
Process Information Screen and activated High Temperature Alarm settings is
shown below.
4.5.4 Temperature Alarm Action Delay
Numerical entry
The Temperature Alarm Action Delay is a time in seconds that the Temperature
value must remain above the high limit or below the low limit before an alarm con-
dition is indicated. Valid settings are in the range of 0 to 3600 seconds. A typical
display with flow meter Temperature Alarm Delay settings is shown below.
4.5.5 Temperature Alarm Action Latch Tabular entry
The Temperature Alarm Action Latch settings controls Latch feature when optical-
ly isolated outputs are assigned to Temperature Alarm event. Following settings
are available: Disable or Enabled.
By default, flow alarm is non-latching. That means the alarm is indicated only while
the monitored Temperature value exceeds the specified set conditions. If optically
isolated output is assigned to the Temperature Alarm event, in some cases, the
Temperature Alarm Latch feature may be desirable.
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High Temp Alarm
50.0 C
5.001 Gl/min AD
51.4 C TA: H
Temp Alarm Delay
1 Second