Crowcon T4 - Accepting and Clearing Alarms

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2.5 Accepting and Clearing Alarms
The operation of alarms in terms of how they are cleared is dependent upon the alarm type and also
the conguration option, which can be changed via Portables Pro 2.0.
The options are ‘latched’ and ‘non-latching’ and the functionality is described in the table below.
i
Alarm 2 cannot be congured and behaves as a latched alarm.
Conguration
Setting
(Alarm 1 only)
Instantaneous Alarm 1 Instantaneous Alarm 2
Latched
An instantaneous alarm 1
can be
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
An instantaneous alarm 2 can be
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
Non-latching
An instantaneous alarm 1
will not
be latched and will return to a non-
alarm state without user acceptance
once the gas level has dropped below
the alarm level
An instantaneous alarm 2 can be
cancelled by pressing the operator
button but only when the gas level has
dropped below the alarm level
i
While in alarm, T4 will continue to record levels of all the gases being monitored.
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