Emerson Rosemount 3308A Reference Manual page 186

3308 series wireless guided wave radar
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Configuration Parameters
August 2017
Figure D-8. High Level Alerts for Rising Levels
A. The alert is active when the level value rises above the alert limit.
B.
The alert turns off when the value falls below the deadband.
Figure D-9. Low Level Alerts for Falling Levels
A. The alert is active when the level value falls below the alert limit.
B.
The alert turns off when the value rises above the deadband.
User defined alert
Variable
The variable selected for the alert.
Alert direction
Whether the alert will be triggered above or below the variable's value.
Limit
The variable value that will trigger the alert.
Note
Alert Limit values must be outside the Upper Null Zone, the Blind zones, and areas close to the Blind
Zones with reduced accuracy.
Deadband
An area of a variable's range where no action occurs to prevent alert from activating/deactivating too
quickly.
174
PRELIMINARY
Alert ON
A
B
TIME
Alert ON
B
A
TIME
Limit
Deadband
Deadband
Limit
Reference Manual
00809-0100-4308, Rev CA
Configuration Parameters

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