Installation and Setup
X-320M™ User's Manual
High Alarm
This setting is used to set the trigger point for a high alarm condition. The number field specifies the
temperature at which the alarm is triggered. An alarm is triggered when the sensor reading exceeds
the High Alarm value. The default High Alarm is
20
.
Low Alarm
This is a Low Alarm trigger that works similar to the High Alarm. The alarm occurs when the sensor
reading falls below the Low Alarm Value. The default Low Alarm is
10
.
Deadband
The Deadband prevents alarms from triggering excessively when the sensor measurement
vacillates around the trigger point.
With High Alarms, the measurement must fall below the High Alarm point minus the Deadband
before the High Alarm will be triggered again. Likewise, the Deadband on the Low Alarm requires
the measurement to rise above the Low Alarm point plus the Deadband before the Low Alarm will be
triggered again.
For example, if the Deadband is set to 1 degree, and a High Alarm occurs at 95 degrees, the
Deadband ensures that once the High Alarm is triggered, it won't trigger again until the temperature
first drops below 94 degrees (95 – 1), as shown in the figure below. The default Deadband is
0.50
.
Page 68
Xytronix Research & Design, Inc.
Figure 2.4q - Temperature Alarm Deadband
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