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High Alarm
Low Alarm
ON
OFF
Process Value
ON
OFF
Alarm
Output
Process Value
Alarm
Output
SET
HYS
SET
HYS
ON
OFF
Alarm
Output
Process Value
Band Alarm
SET
(SET - (BAND/2))
(SET + (BAND/2))
HYS
HYS
SET
= Alarm Set value
HYS
= Hysteresis value for Alarm output
BAND
= Bandwidth for Band Alarm
i
7. Operation Graphics of Alarm Types