Emerson 3308A Rosemount 3308 Series, Справочное руководство

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174
Reference Manual
00809-0100-4308, Rev BA
Appendix D: Configuration Parameters
December 2014
Configuration Parameters
High/Low Level Alerts
High/Low Level Alerts are triggered when the level goes outside the user defined Limits. There
are 4 standard Level Alerts. Hi Level Alert and Hi-Hi Level Alert are used for rising levels, and Lo
Level Alert and Lo-Lo Level Alert are used for falling levels. See
Figure D-4 and Figure D-5 for
more information.
Figure D-4. High Level Alerts for Rising Levels
Figure D-5. Low Level Alerts for Falling Levels
Enable Level Alert If the alert will be enabled or not.
Limit The Level 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 the Level range where no action occurs to prevent
alert from activating/deactivating too quickly.
A
B
TIME
LE
VE
L
Limit
Deadband
Alert ON A The level is rising above user
defined alert Limit. An alert
message is displayed in AMS
Wireless Configurator and on
Field Communicator.
B The alert message is reset once
the level value falls below the
Deadband area.
A
B
TIME
LE
VE
L
Deadband
Limit
Alert ON A The level is falling below user
defined alert Limit. An alert
message is displayed in AMS
Wireless Configurator and on
Field Communicator.
B The alert message is reset once
the level value rises above the
Deadband area.