TheBR Posted July 4, 2010 Posted July 4, 2010 Hi All, I have a Veritas 8R with hard wired PIR's. One of them (Zone 6) keeps triggering and the neighbours are phoning me when im at work. Its always Zone 6 that triggers. I've had the system for about a year and a half and had no bother with it until now. Zone 6 is at the top of some stairs in between 2 doors, looking towards a half landing where the stairs double back that also has a window. There is also another bedroom with its own sensor to the left of it. Heating has been off, some windows upstairs were partially open for air (behind sensor in one of the bedrooms) but no doors had blown shut. I've cleaned the sensor and had no joy. I do have a pet which tends to hand around the hallway but as mentioned this has been in and working with no problem for around a year and a half and its never triggered before. Any suggestions?
A-G Posted July 4, 2010 Posted July 4, 2010 Any suggestions? 3 suggestions: Draught from windows Pet triggering it Faulty sensor It's got to be one of them. You'll have to experiment to determine which, but my money is on either the draughts or the pet . . . PM me for access to the SSAIB members discussion area.
TheBR Posted July 4, 2010 Author Posted July 4, 2010 Fair enough, thanks for the fast reply. Can I ask though, how could a draught cause it?
james.wilson Posted July 4, 2010 Posted July 4, 2010 cooling the lens, or cooling a wall or door etc in the scene fast enough to trigger it. Have seen optex fx50 setup by a draughty window adjacent to the sensor.The sensor cant 'see' the draught as such but can see the effects of it. But id say pet or duff sensor/faulty connection etc securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
arfur mo Posted July 4, 2010 Posted July 4, 2010 Hi All, I have a Veritas 8R with hard wired PIR's. One of them (Zone 6) keeps triggering and the neighbours are phoning me when im at work. Its always Zone 6 that triggers. I've had the system for about a year and a half and had no bother with it until now. Zone 6 is at the top of some stairs in between 2 doors, looking towards a half landing where the stairs double back that also has a window. There is also another bedroom with its own sensor to the left of it. Heating has been off, some windows upstairs were partially open for air (behind sensor in one of the bedrooms) but no doors had blown shut. I've cleaned the sensor and had no joy. I do have a pet which tends to hand around the hallway but as mentioned this has been in and working with no problem for around a year and a half and its never triggered before. Any suggestions? 1st off keep the pet out of the protected areas (child gate may work), as they may be attracted up the stairs by the window cleaner or whatever noise happens be noticed by the pet, or have a per resistant sensor fitted on the landing (not expensive). these units can 'feel' your heat from 8 -15 meters away depending on model. so shut the windows or shut the doors to the rooms with windows left on night latch (you should anyway to help prevent spread of fire), i.e. no air gaps end of where there is an active detector. doors if they move will act like mirrors, and so can cause the detector to operate if the door moves, or it can cause 'discovered/uncovered' heat source detection. so either make sure they are held securely open or securely held shut on the catch (recommended for fire spread reduction). sensors work on detecting movement of heat, so if you have a window open, even partially and the wind gets up you get false alarms from warm/cold thermals. try this, have a shower then don't dry yourself and stand on the landing, you will soon feel the movement of temperatures other than that check connections are sound, in the detector and in the panel, alarms don't like intermittent connections in any shape or form. i would also test your system foe mains fail operation, detector 6 may be the most sensitive to low voltage, so always te 2st to trigger if the power is of for n extended period or the battery is weak. Arfur If you think education is difficult, try being stupid!!!!
A-G Posted July 4, 2010 Posted July 4, 2010 try this, have a shower then don't dry yourself and stand on the landing, you will soon feel the movement of temperatures Next time I go to a house with false alarms I'll offer to do that . . . PM me for access to the SSAIB members discussion area.
Guest Oxo Posted July 4, 2010 Posted July 4, 2010 For crying out loud........... Now for good advice. Isolate the sensor, put the alarm pair together and see what happens. If it goes off there is a wiring problem. If not, put back and cover the lens. If it goes off the PIR is at fault. Easy really.
TheBR Posted July 4, 2010 Author Posted July 4, 2010 Hi oxo, sorry I'm not overly familiar with these devices. Could you explain a little bit more about how I go about isolating it and what an alarm pair is.
antinode Posted July 4, 2010 Posted July 4, 2010 I would'nt advise messing around with it too much if you're not sure what your doing with alarms. Try covering the sensor over for a few days with a bit of card taped to the front of the lense. This will prove if the problem is external to the detector (ie temperature changes/draughts), or something wrong with the PIR/cabling/panel. Trade Member
Guest Oxo Posted July 4, 2010 Posted July 4, 2010 Alarm pair is the normally closed pair of wires from the PIR. Twist them together and then set the system. If it goes off the trouble is the wiring. If not rewire back into the device and cover it, from inside. If it goes "off" the device is the problem.
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