6. Model 900-0230 (with digital display)
Operating Characteristics
Peak Level Memory (model 900-0230 only)
When the Peak Level button is pressed and held, the display shows the
highest CO reading taken by the CO alarm since its
last reset or power up. In this example 120 PPM was
the maximum amount of CO recorded since the unit
was last reset.
The Peak Level display feature will display levels
between 11-999 PPM. Although the Peak Level
feature will display levels below 30 PPM, these levels
will not result in an alarm no matter how long the device is exposed to
these levels. The Peak Level feature is helpful in identifying if you have
had a CO reading since resetting the alarm.
Concentrations of CO between 1 and 30 PPM can often occur in
normal, everyday conditions. Concentrations of CO below 30 PPM may
be an indication of a transient condition that may appear today and
never reappear. Some CO conditions may start out as low level leaks but
could develop into CO concentrations that may become harmful.
If this happens, the CO alarm will detect the dangerous level and alarm,
notifying you and others of the conditions.
DO NOT ignore high
concentration readings above 30 PPM or a CO alarming device
that is in alarm.
Peak Level Memory Reset
Press the Peak Level button; with the button still pressed, press the
Test/Reset button for two seconds and release. The number on the
display will turn to “0”, the memory will be cleared and the alarm will
begin monitoring for CO. The Peak Level memory is also reset when the
unit loses power.
Sample Peak
Level Reading
7. Alarm Characteristics
Carbon Monoxide Alarm Indicator
When the alarm senses a dangerous level of CO, the unit will emit a
loud alarm pattern. The alarm pattern is 4 quick beeps followed by 5
seconds of silence, repeating for 4 minutes – and then 4 quick beeps
once every minute as long as dangerous CO conditions exist. The red
Alarm LED will flash the same pattern and the digital display (where
equipped) will indicate CO concentrations in parts per million (PPM).
