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Series 4060 Operation
Teledyne Analytical Instruments 53
-> AL-1 DEFEATED
AL-1 HIGH
AL-1 NON-FAILSAFE
AL-1 NON-LATCHING
AL-1 20.00 ppb
AL-2 ACTIVE
AL-2 LOW
AL-2 FAILSAFE
AL-2 LATCHING
AL-2 50.00 ppb
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Note: For the purpose of example, Alarm 2 has been set
differently than Alarm 1.)
Note: An alarm in 'alarm condition' is signaling that action must
be taken such as correcting the alarm or the analysis
concentration. If an active (not defeated) alarm has been
set to HIGH at 20.0 ppb, and the analysis concentration is
above that level, then the 'alarm condition' is occurring.
DEFEATED: If an alarm is defeated, its relay is de-energized,
regardless of failsafe condition. A defeated alarm does not react to a
transition over its trip point in either direction.
HIGH: If an alarm is set as HIGH, it will not create a new alarm
condition (see latching) if the analysis concentration is below the trip
point, if the analysis concentration is above the trip point, then an alarm
condition will be created or maintained.
FAILSAFE: A non-defeated alarm that is in FAILSAFE mode
energizes an alarm relay in a non-alarm condition and de-energizes an
alarm relay in an alarm condition.
Note: Failsafe condition of an alarm is in software. This is not
related to relays that have both normally-open and
normally-closed terminals.