Operation
Normal Operating Characteristics
When you first power up the unit, the alarm will sound briefly to let you know the unit is receiving power and that the alarm circuit is functioning.
You will see three eights on the digital display, indicating the alarm is in the
Blinking Dot
Within 20 seconds, your CO alarm will start monitoring for CO. The number indicates a measurement of carbon monoxide in parts per million (ppm). Note: The number will probably be zero (0). This is a normal condition for most households and shows that no measurable amount of CO has been detected.
The alarm has begun monitoring the air for carbon monoxide and will con- tinue to do so as long as it receives power.
When the alarm is unplugged or loses power and a good 9V battery is installed, the alarm will automatically switch to its battery backup mode and you will notice the following:
•The digital display will show a blinking dot only – this helps conserve the battery’s power.
•The digital display will show a number only if it senses carbon monox- ide while in backup mode.
•If CO is detected while on battery backup, the alarm pattern is 4 quick beeps – followed by 5 seconds of silence
Note: The alarm will operate on battery backup for at least 20 hours.
When AC power is restored, the alarm will automatically switch back to nor- mal operating mode.
When the alarm is unplugged or loses power and you have a low battery installed, you will notice the following:
•A fading alarm will sound alerting you the unit has switched to its backup mode, but the 9V battery is low.
•A blinking dot will be displayed and the sounder will chirp every 15 seconds.
•When peak level is pushed, the display will alternate between “Lb.” and CO reading.
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