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OPERATION
MUTING THE AUDIBLE CO
2
ALARM
Audible and visual deviation alarms activate if the incubation chamber CO
2
concentration deviates by 1% above or below the CO
2
setpoint. The low deviation
audible alarm has a delay of 15 minutes to prevent the low alarm from sounding
each time the doors are opened, causing a short-lived drop in CO
2
concentration.
To mute a CO
2
deviation alarm:
Press and hold either the Up or Down arrow button on the CO
2
Control until the amber Mute LED illuminates and the audible alarm
shuts off.
• The audible alarm will remain muted for the duration of the
current CO
2
deviation.
• The visual alarm indicator will remain illuminated.
• Any new deviation of ±1% or greater will reactivate the
audible alarm.
Low and No Gas Alarms Timeline
NO GAS SUPPLY ALARM (NGS)
A second alarm activates if the Low Gas deviation indicator light is illuminated for longer
than 20 minutes.
• The letters “ngS” will appear in the CO
2
display indicating No Gas Supply.
• The alarm will remain active, even if the incubator is turned off and back on.
• The NGS alarm remains on until CO
2
is restored to the chamber. It may take 2 or more
minutes of CO
2
injections to establish a concentration high enough to deactivate the alarm.
Gas Alarm Muted
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