ANALOX ADM Aspida, User Manual

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ADM & Sub Aspida
User Manual
Int. Approved
Document ref: PSA-811-22 March 2020 Page 22 of 45
Copyright © 2017 Analox Ltd. All Rights Reserved.
Commercial in Confidence
6.12 Alarm latching
Sometimes it is useful for a user to be alerted to a harmful gas level, even after the level of gas
has dropped to a safe level. The Analox Aspida can be configured to use latching alarms so that
alarms triggered by harmful gas levels will not be missed. The latching alarms option can be
enabled using the Aspida configuration software.
If the device is configured to use latching alarms, then any alarm that is triggered will remain
active until it is acknowledged by pressing the
button.
Example
If a high-going alarm is activated by an increasing level of gas, the alarm will continue to sound
even after the gas level has dropped below the alarm set-point. The alarm can be acknowledged
by pressing the
button when the gas reading has fallen below the set-point.
In the case of multiple alarms, the highest priority alarm that was triggered will be latched. If the
priority 1 alarm is latched and the gas level drops below the priority 1 set-point, pressing the
button will clear the priority 1 alarm, however, if the gas level is still sufficient to trigger the
priority 2 alarm, the device will continue to alarm at a priority 2 level.
6.13 Alarm muting
Sometimes it is desirable to be able to mute the horn or stop the device vibrating when an alarm
is triggered. The Analox Aspida provides an option to allow alarms to be muted. The mutable
alarms option can be set using the Aspida configuration software.
If the alarm muting option is set on the device, any active alarm can be silenced by pressing the
button whilst in an alarm state. Pressing will deactivate the horn and the vibration. The red
indicators and the on-screen warning will continue to flash until the alarm condition is cleared by
safe levels of gas. In the case where a lower priority alarm has been muted and a higher priority
alarm is triggered, the alarms will be un-muted.
Example
If a priority 2 alarm is activated and muted and the detected gas level changes to activate
a priority 1 alarm, the horn and vibration will re-activate to warn the user of the increased
severity. A muted alarm will not be un-muted in the case where the alarm level drops to a
lower priority.
6.14 Quiet alarms
Sometimes it is desirable to suppress the audible indication when alarm is triggered. The Analox
Aspida provides an option to allow alarms to be silenced. The quiet alarms option can be set using
the Aspida configuration software. The display will indicate quiet mode with an icon
in the
status area.