Problem:
Alarms are getting generated even if values seems less for that time.
Analysis Steps
Check Alarm configuration:
Site Admin ->Alarms -> Conditional Alarm ->
Select Device whose alarm has to be checked.
Check what condition is configured for which variable, at which value and for which function like average, instantaneous etc.
As an example consider variable pH, if its average value for 15 mins goes beyond 7.5 then alarm should get generated.
Even if current value (instantaneous value) is less than 7.5 then also alarm generates as last 15 min average is greater than 7.5, then also alarm generates.
It is not any false alarm.