SAFETY AND SECURITY
43
CO ALARM
current CO Level you will see something similar
to the following.
FireAngel's unique digital read out displays
the amount of CO that the sensor is detecting
shown in parts per million (PPM). It is designed
to indicate levels from 10PPM to 999PPM.
Note: Ambient background levels between
0PPM and 10PPM will show as 0PPM
When the alarm is showing the current
temperature you will see something similar to
the following.
In both modes you will notice a symbol
appear briefly in the top left hand corner of the
screen once every minute. This is an addition-
al indication to show you that the alarm is
operating as well as the flashing green LED.
To switch between CO and temperature view,
simply press the Test/Mode button briefly. The
unit will also sound when pressing the button
to switch between the two display modes.
You will also notice that when switching
between modes the display will change
slightly, this is because the alarm is displaying
the Peak Level CO reading that it has recorded
in the last 4 weeks, please see the following
peak level reading feature section for further
description.
Note: If the alarm is in temperature view and
detects CO it will automatically switch back
to CO display mode.
Power pack, sounder and circuitary test
Pressing the Test/Mode button will also test
the power pack, sounder and circuitry of
the alarm. The unit will sound and the alarm
LED below
will illuminate red. You should
perform this test once per week.
Peak Level Reading feature.
The alarm will record the highest reading of
CO that it has detected in the last 4 weeks.
This information is useful if your alarm has
sounded so you can see the highest level of
CO detected during that time. It is also useful
to check periodically to see if a readable level
of CO has been detected for a short time, but
not long enough to trigger a full alarm. The
peak level reading is shown briefly every time
you press the Test/Mode button and will look
something like the image below.
Note: It is possible and quite normal for the
peak level to remain at 0ppm, i.e. this simply
means that the alarm has not detected any
CO in the last 4 weeks.
The Peak Level reading will be reset to 0ppm
whenever a Sensor Test is carried out. (See the
next section for Sensor Test).
Sensor Testing
! CAUTION: Sensor testing should only
be performed by a responsible adult.
This test should only be performed once a
month. Excessive testing will shorten the life
of the power pack.
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