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F e a t u r e s
Wa t l o w S e r i e s F 4 P
Alarms
Alarms are activated when the process value or tempera-
ture leaves a defined range. A user can configure how
and when an alarm is triggered, what action it takes and
whether it turns off automatically when the alarm condi-
tion is over.
Configure alarm outputs in the Setup Page before setting
alarm set points.
Alarm Set Points
The alarm high set point defines the process value or
temperature that will trigger a high side alarm. It must
be higher than the alarm low set point and lower than
the high limit of the sensor range.
The alarm low set point defines the temperature that
will trigger a low side alarm. It must be lower than the
alarm high set point and higher than the low limit of the
sensor range.
Location in software: Operations Page > Alarm Set Point
> Alarm x (1 or 2).
Alarm Hysteresis
An alarm state is triggered when the process value
reaches the alarm high or alarm low set point. Alarm
hysteresis defines how far the process must return into
the normal operating range before the alarm can be
cleared.
Alarm hysteresis is a zone inside each alarm set point.
This zone is defined by adding the hysteresis value to the
alarm low set point or subtracting the hysteresis value
from the alarm high set point.
Location in software: Setup Page > Alarm Output x (1 or
2).
Figure 7.10 — Alarm Settings.
Normal Operating Range
Low Side Alarm Range
High Side Alarm Range
Alarm High Set Point
Alarm Low Set Point
Temperature
Alarm Hysteresis
Alarm Hysteresis
Process, Deviation or Rate Alarms
A process alarm uses one or two absolute set points to
define an alarm condition. A deviation alarm uses one or
two set points that are defined relative to the control set
point. High and low alarm set points are calculated by
adding and/or subtracting offset values from the control
set point. If the set point changes, the window defined by
the alarm set points automatically changes with it.
A rate alarm is triggered by a change in temperature or
process value that exceeds the selected rate.
Location in software: Setup Page > Alarm Output x (1 or
2).
Содержание F4P Series
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Страница 14: ...2 8 Operating from the Front Panel Watlow Series F4P Notes...
Страница 58: ...6 32 Parameters Watlow Series F4P Notes...
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Страница 78: ...7 20 Features Watlow Series F4P Notes...
Страница 94: ...8 16 Installation and Wiring Watlow Series F4P Notes...
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