Pre-Alarm:
The digital display shows Carbon Monoxide levels above 30 parts per million (30ppm CO).
This helps locate CO leaks as the unit gives an indication straight away. When the alarm detects over
50ppm CO the red light flashes every 2 seconds. Note the Pre-Alarm signal may be triggered by CO
coming for example, from cooking with gas, from car engines or from nearby barbecues. This is usually
not a concern unless the Pre-Alarm signal persists until the alarm sounds and the CO source is unknown.
NOTE
: The CO Alarm may sound if cigarette smoke is blown into it, or aerosols are released nearby.
CO ALARM MEMORY.
When the test button is held the display shows the previous peak reading. This tells you if the unit has
detected CO in your absence and helps to detect and locate leaks, monitor premises etc.
Also when the test button is pressed the horn will sound, and the red light will only flash if the unit has
previously detected CO and been in alarm. The flash rate indicates the level of CO detected as below:-
-
Red light is Off
– No CO detected since reset or power up.
-
Red light flashes 2 times
(in 4 seconds) every 40 seconds, 50 ppm CO detected for about 90 minutes
since reset or power-up.
-
Red light flashes 8 times
(in 4 seconds) every 40 seconds, 100 ppm CO detected for about 40
minutes since reset or power-up.
-
Red light flashes 16 times
(in 4 seconds) every 40 seconds, 300 ppm CO detected for about 3 minutes.
Reset Memory
by holding down the test button for over 20 seconds until the red light stops flashing and
display shows 000. Cover the horn with a cloth to muffle the alarm during this time.
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