Process Analyst alarm pens indicate when alarms
are acknowledged.
The period of time an alarm is
left unacknowledged for is represented by drawing a line above the
trend line. A new unacknowledged period begins whenever the alarm
transitions to an on state.
The unacknowledged period ends
when an Operator acknowledges an alarm. This is identified by a
sample marker that indicates the exact time the alarm was
acknowledged, and by drawing an unacknowledged line down to that
sample marker, as shown here:
