Kidde C3010-CA User Manual page 16

6. Model C3010-D-CA (with digital display)
Operating Characteristics
Peak Level Memory (model C3010-D-CA 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.
Sample Peak
The Peak Level display feature will display levels
Level Reading
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 then release the Test followed by the Peak
Level buttons. The number on the display will turn to "0", the memory
will be cleared and the alarm will begin monitoring for CO.