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How the Unit Determines When to Alarm
Your Kidde alarm uses advanced technology to monitor the environ-
ment in your home and warn you of certain levels of CO. An internal
microcomputer works together with the sensors inside the alarm to
determine the levels of CO in the air. The microcomputer is calibrated
to trigger the unit’s alarm before most people would experience any
symptoms of CO poisoning.
Accuracy of the Digital Display
Each Kidde CO Alarm is calibrated at a CO concentration of 150 ppm
in air, at 80° F (+/- 10° F) and 40% (+/- 3%) relative humidity.
Depending on the ambient condition (temperature, humidity) and the
condition of the sensor, the alarm readings may vary.
The digital reading tolerances are:
Ambient: 80° F (+/- 10° F), atmospheric pressure +/- 10%, 40% +/- 3%
relative humidity
Reading (Tolerance of display reading)
0-999 PPM +/- 20% + 15 ppm
Technical Information
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This Kidde alarm meets the alarm response time
requirements as follows for CO:
At 30 PPM, the unit cannot alarm in less than 120 minutes
At 50 PPM, the unit must alarm within 60-90 minutes
At 100 PPM, the unit must alarm within 10-40 minutes
At 300 PPM, the unit must alarm within 3 minutes.
Replacement of the Alarm
This CO alarm has an "operational end of life" feature which will indi-
cate when to replace the alarm.
Seven years after initial power-up, this unit will “chirp” every 30 sec-
onds to indicate that it is time to replace the alarm. A label has been
affixed to the side of the alarm that has “Replace by” date printed on it
to aid in identifying the date of replacement.
REPLACE THE ALARM IMMEDIATELY! IT WILL NOT DETECT CO IN THIS
CONDITION.
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