carbon monoxide detectors nighthawk image
Kenneth W
Answer
Not sure if I understand your question. If you mean the display (if yours has one) that should read 0, unless you are testing it with the test button. My NightHawk model 900-0014-04 reads 163 when the test button is pressed then sounds the alarm. Check the manual for your unit or look on the back of it for test instructions.
Most are calibrated for 200 PPM in less than 35 minutes and have an alarm response time of less than 90 minutes for a 100 PPM concentration of CO.
Not sure if I understand your question. If you mean the display (if yours has one) that should read 0, unless you are testing it with the test button. My NightHawk model 900-0014-04 reads 163 when the test button is pressed then sounds the alarm. Check the manual for your unit or look on the back of it for test instructions.
Most are calibrated for 200 PPM in less than 35 minutes and have an alarm response time of less than 90 minutes for a 100 PPM concentration of CO.
I have a nighthawk carbon monoxide detector, I have no idea what those digital numbers are for?
dreamer236
I was cooking in the kitchen today and I notice the number got up to 9 but the alarm did not go off. I just want to know about these numbers, I have no idea how far the numbers go. I thank you for your help.
Answer
If you can't find the manual, try looking up your model on the internet. The numbers *may* indicate parts per million of CO detected. It takes 1000ppm to cause unconsciousness in an hour, so 9ppm isn't good, but it is considered "normal" background CO.
Take a look at http://www.nfpa.org/itemDetail.asp?categoryID=280&itemID=18270&URL=Research+&+Reports/Fact+sheets/Home+safety/Carbon+monoxide+poisoning&cookie%5Ftest=1 for additional information.
If you can't find the manual, try looking up your model on the internet. The numbers *may* indicate parts per million of CO detected. It takes 1000ppm to cause unconsciousness in an hour, so 9ppm isn't good, but it is considered "normal" background CO.
Take a look at http://www.nfpa.org/itemDetail.asp?categoryID=280&itemID=18270&URL=Research+&+Reports/Fact+sheets/Home+safety/Carbon+monoxide+poisoning&cookie%5Ftest=1 for additional information.
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