10
smoke, for example an extinguished candle
or match, will not contain sufficient levels of
carbon monoxide to obtain a response from
the detector during this test. Please note
your CO detector will not detect smoke.
CAUTION:
Sensor testing should only be
performed by a responsible adult. This
test should be performed annually.
NOTE:
Aerosol CO may be used in order to
avoid having to burn incense sticks etc.
However we recommend that incense
sticks are used as they are cheap and readily
available.
•
Read all steps thoroughly before
attempting to test your the sensor
Step 1
If the detector is wall or ceiling
mounted unhook the detector
from the screws.
Step 2
Cover the sounder vents with
one hand. Press and hold the
Test/Reset button down with
your thumb/finger until the Fault
LED illuminates yellow and the
sounder sounds for a second
time (this should happen after
around 5 seconds). Release
the Test/Reset button. Upon
releasing the Test/Reset button
the Fault LED will flash yellow
once every second. This indicates
that the sampling rate of the
detector has increased and can
be tested using a known source
of CO.
Step 3
Light an incense stick using a
match or lighter. Be sure to blow
out the flame so that the incense
stick is smouldering. Extinguish
the lighter, or put out the match
and place it into a dish of water.
Step 4
Turn the detector on its side so
that the vents on the right hand
side of the detector are pointing
downwards (see diagram
opposite). Hold the burning
incense stick 15 cm (6 inches)
below the detector, so that the
smoke enters the vents on the
side of the detector. An increase
in the localised carbon monoxide
level within the sensor to more
than 50ppm will cause the
sounder to sound for one cycle
of four loud beeps and the Fault
LED to illuminate yellow for a
short time. This is the end of the
test. The Fault LED will no longer
flash yellow and the detector
will go back to normal operating
Test / Reset
Button
Summary of Contents for CO-9X
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