46
NOTE: The value of the Low Pressure Alarm must be less than the value of the
High Pressure Alarm.
b) Low Pressure Alarm (Numerical entry)
The limit of required Low Pressure Alarm value can be entered in currently selected
pressure units, in increments of 0.1% of the pressure full scale range from 0.0 to 99.9%.
If a Low Alarm occurs, and SSR output is assigned to the Low Pressure Alarm event
(see Section 6.4.15.6) the SSR output will be activated when the pressure is less than
the Low Pressure Alarm value.
The Low Pressure Alarm condition is also indicated on the corresponding Process
Information Screen by alternating every second between units of measure and the
alert "LOW!"
c) High Pressure Alarm (Numerical entry)
The limit of required High Pressure Alarm value can be entered in currently selected
pressure units, in increments of 0.1% of the pressure sensor full scale range from
0.1 to 100%.
If a High Alarm occurs, and SSR output is assigned to the High Pressure Alarm event
(see Section 6.4.15.6), the SSR output will be activated when the pressure reading is
more than the High Pressure Alarm value.
The High Pressure Alarm condition is also indicated on the corresponding Process
Information Screen by alternating every second between units of measure and the
alert "HIGH!"
NOTE: The value of the High Pressure Alarm must be greater than the value of
the Low Pressure Alarm.
d) Pressure Alarm Action Delay (Numerical entry)
The Pressure Alarm Action Delay is a time period in seconds that the Pressure Reading
value may remain above the High limit or below the Low limit before an Alarm
condition is activated. Valid settings are in the range of 0 to 3600 seconds. The default
value is 0: no delay.
e) Pressure Alarm Power On Delay (Numerical Entry)
Sometimes it is convenient to enable the Pressure Alarm only after a specifi ed power-up
delay interval. The “Pressure Alarm Power On Delay” option allows the user to set a
specifi ed time interval which must elapse from the moment of the device power-up
event before the Pressure Alarm function will be activated. Valid settings are in the
range of 0 to 3600 seconds. The default value is 0: no delay.
To Next Page
Loading...
