144
Figure 46:
Alarm Setup tab
Alarm Delay and Pre-alarm Delay
The time until the alarm (or pre-alarm) is activated. You may
not want to have the alarm sound immediately after the alarm
level is breached as you are only interested in a condition
where the alarm level lasted a certain amount of time.
For example, if monitoring change of temperature in a freezer,
you would only be interested in a High alarm which lasted
more than one minute as anything else could just be caused
by the freezer door opening for a few seconds, as opposed to
a power failure leading to rise in temperature.
Alarm Duration
The duration of the alarm that is set off by one or more
sensors breaching the alarm level.
