Kamis, 21 November 2013

What is this loud beep in the house?Fire Alarm?

carbon monoxide alarm 1 beep on Basic Functions | Smarter Smoke Alarms | This Old House
carbon monoxide alarm 1 beep image



OWL


Every about five minutes a loud quick beep hurt my ears,I think I once heard that it might be the fire alarms low on battery can it be this? I heard it in many other houses too.like my Grampa's House and friend's houses.What can this be?It's driving me NUTS!


Answer
READ EVERY WORD FIRST, ALL OF THEM, PLEASE!!!!
Well that's an easy one, I am assuming you are young since you reference Grandpa. Note the beep has to be from something electronic Possible sources: Burglar Alarm company backup battery to the main system is weak, the remotely located wireless window/door sensors have batteries that when dead make the Alarm console beep.

A smoke detector is likely. I have some that mount directly to the wall and some to a bracket that is mounted and you turn the "front" of the detector CCW or CW to remove from the bracket. You need to know if the smoke/fire alarm is a battery unit (CLUE: IF YOU CAN TAKE IT OFF WHERE ITS MOUNTED AND IF IT HAS NO WIRE INTO THE WALL/CEILING ITS BATTERY, NOW TURN IT OVER TO THE "WALL SIDE", MAYBE THERE IS A VISIBLE 9V BATTERY COMPARMENT SPOT RIGHT IN FRONT OF YOU), if not it might be a open the cover unit, so, open the cover by looking, AND THEN LOOKING AGAIN, you might have to pry a "tab" or unscrew a screw before opening, when you see the 9v battery you will be half done, (if YOU DON'T ABSOLUTELY KNOW WHAT A 9V BATTERY LOOKS LIKE STOP SEE TEST BUTTON BELOW). PLEASE don't mess with the "120" volt smoke detector, call the company if it's the "beeper" [all non battery smoke detectors may not be "120" volt but they may be 12-24 volt AC or DC so they still might be dangerous] (I say that more for those who might nitpick me).

If it really beeps every five minutes it wont hurt to pull the 9volt battery and wait 7 minutes. TEST SECTION: If you can't wait, be brave, re-read above and extract the battery, put the 9v battery to your tongue, if it mildly tingles it's a dead battery, if it smarts put it back in and wait the "5" minutes. NOTE YOU CAN'T DIE FROM THIS EXCEPT MAYBE IF YOU HAVE A PACEMAKER OR BUILT-IN HEART DEFIBRILLATOR SO THOSE FOLKS DON'T "TONGUE" IT.

Or best of all, get a volt meter from an electronics pal. 9 volts minus 1.8=7.2 volts = battery no good (if the battery is low by 20% its dead, this even applies with 6 volt, 1.5volt etc.( -20% is my guide for alkaline batteries),

Also if you are afraid just press the TEST BUTTON, on the smoke detector, if it has one, buy a new one if it doesn't have a test button, its too old or the owner was too frugal. [IF IT WONT SOUND OFF UNDER TEST ITS DEAD, IF IT DOES SOUND THEN YOU CAN NOW KNOW IF ITS "YOUR BEEP"] Now identify if its a 9v battery by taking it gently off its mount or bracket mount also see above again. See the test section if you feel braver.

If you succeed in removal AND REPLACE THE 9V note that I put all my detectors on a wall AS CLOSE to the ceiling on a 3-4 inch bread twist tie or better "wire" to a screw or thumb tack [ yes it looks fine if you do it right] for easy removal of batteries and no loss of sensitivity. Generally smoke rises driven by the heat, so the closer to the ceiling the better.
(this wire mount idea is at your discretion, I'm sure some fire guy is gonna disagree but in my experience of an actual house fire in 1987 with the detectors mounted as such, they saved my sleeping wife and cat!)

Check for a carbon monoxide detector and again make sure its not "120" volt, press the test button. A UPS on your computer with a near dead battery makes beeps. A medical device for "Gramps" may be at fault. a cell phone or cordless home phone beeps when near dead. A microwave or new fridge with the door open can beep. An AC alarm clock can beep when its 9volt battery gets weak.. Get the common thread?

If after all that you can't isolate it, invite some other young folks over for sodas, [statistically better at hearing high pitched beeps] put the battery back in the smoke detector and have the young'uns stand at different parts around the seeming sound area to pinpoint the beep. Keep in mind that some beeps are so foxy that they are like a ventriloquist and "throw their voices" so move around like musical chairs till every one agrees. Need I say more?? Good Luck! WHEW

wired smoke detector keeps beeping I have turned it off at the mains but it is still beeping how do I stop it?




Sue H





Answer
I have worked in the electronic security industry for over 40 years, and have encountered many of my customers with this same complaint. Here are the most common causes of this problem.

1) You may have identified the wrong detector. In other words, the beep is coming from somewhere else, and not the smoke detectors. If you are absolutely certain that you have disconnected all power to the smoke detector then there is no way a noise can come from a detector that has no power. It is ether getting power from somewhere else, or you are hearing a beep from another device such as a carbon monoxide detector that is nearby.

2) Your smoke detector is one that is wired to an alarm system. In this case I highly recommend that you contact your alarm company for service because your smoke detector is getting power from a back up battery that is a part of your alarm system, and leaving the main power shut off will wear that battery down, and then you may have to have it replaced too.

3) Your smoke detector has a built in back up battery. You can shut off the main power to your detector, but it will still run on the internal battery until it dies, which could take several hours, or maybe even days. In this case you need to take the smoke detector down and see if there is a battery inside and disconnect it.

Most smoke detectors will come down by simply grasping the detector on the outer edges and giving it a twist either to the left or the right. If you look closely on the outer housing of the detector, there should be instructions on how to open it in raised lettering on the plastic. Be careful not to force it too much if the detector is expensive because most people end up breaking the housing or the mount of the device to the point it needs to be replaced with a new one.

The most common reason these detectors start beeping when there is no reason such as a fire, is because it has reached the end of it's useful service life. A very good quality detector should last about 10 years before it should be replaced, so if yours are older than that, you need to consider replacing them with new ones, and if they are wired in to your household power, or to your wired security system, then call in a professional service technician to have them replaced and tested for operation.




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