Canned CO tester is a non-flammable aerosol . [2] X Research source Inhalation of canned CO or contact with the spray is not dangerous, if used as directed. [3] X Research source It contains CO gas at a concentration that is not harmful unless illegally concentrated.
You can buy or build a testing device that holds the test spray and seals around the CO alarm while you test the alarm. If the detector doesn’t go off, you may need to change the batteries or replace the unit.
This is also the battery test button, so if you press it when the unit is at rest, the alarm will briefly sound, telling you that the battery is adequate, but does not test the sensor.
Pushing the test button does not test the actual CO sensor; it tests to make sure the battery and circuitry in the unit is working correctly.
Some CO alarms now have a sealed 10-year battery and an automatic timer to tell you when the alarm needs to be replaced. It will start to beep or chirp a code periodically, telling you it needs replacement. Look at your unit’s instruction manual to identify what the code means. To make sure the replaceable batteries stay fresh in your CO detector, change them every 6 months, but no less than annually. If you live in a place that recognizes Daylight Savings Time, switch out the batteries whenever you change your clocks. [7] X Trustworthy Source Consumer Products Safety Commission Independent U. S. government agency responsible for protecting consumers by developing safety standards and conducting product research Go to source If you change the batteries and the unit still doesn’t work, or it continues to give a low-battery alarm, it may have expired. Replace your CO detector.
If the CO alarm starts to chirp or beep periodically, check to see if the battery needs replacement by pressing the test/reset button. If the unit continues to beep or chirp after the test, and it does not have a replaceable battery, the unit may need to be replaced, having expired. Check your user manual for specific instructions on how to turn it off and to properly dispose of it. Install a suitable replacement immediately.
Although CO by itself is not lighter than air, one should note that many sources of CO also generate heat. The heated air rises in cooler air, naturally carrying the CO with it, as the CO mixes with the air.
