zs123 Posted March 25, 2008 Share Posted March 25, 2008 hi i keep getting false alarms on a PIR in our shed, it is approx 18 foot by 7 and has windows that are covered in sheets so the sensor cant 'see' outside. seem to keep getting false alarms and they always seem to be in the pm but never at night. any ideas why this could be? have tried swapping sensors, same problem. its a bthome monitor unit Link to comment Share on other sites More sharing options...
FASTCAR Posted March 25, 2008 Share Posted March 25, 2008 Hi , A draughty shed is a harsh environment for a pir.Why not fit a contact on the door instead , some radio kit allows you to wire-in extra contacts to one receiver. Regards. Link to comment Share on other sites More sharing options...
topalarms Posted March 25, 2008 Share Posted March 25, 2008 Spiders, mice, rats etc also could be a problem for a standard PIR. Link to comment Share on other sites More sharing options...
morgan306 Posted March 25, 2008 Share Posted March 25, 2008 Direct sunlight heating up the wooden panels,or shining through these sheets you mention? Link to comment Share on other sites More sharing options...
arfur mo Posted March 25, 2008 Share Posted March 25, 2008 your posibly using a detctor selected on price not for being the best in that area's enviorment, so either increase the pulse count to max in the detector (usually a movable link on the pcb), or make that zone 'double knock' (via programmming mode) or the best idea is to replace that pir with a dual-tec detector, just be sure to follow the set up proceedure carefully for the mwd sensoer. regs alan. If you think education is difficult, try being stupid!!!! Link to comment Share on other sites More sharing options...
Justin Roberts Posted March 25, 2008 Share Posted March 25, 2008 your posibly using a detctor selected on price not for being the best in that area's enviorment, so either increase the pulse count to max in the detector (usually a movable link on the pcb), or make that zone 'double knock' (via programmming mode) or the best idea is to replace that pir with a dual-tec detector, just be sure to follow the set up proceedure carefully for the mwd sensoer. regs alan. YER SPOT ON THAT ALAN. I WOULD OF SAID THE SAME Link to comment Share on other sites More sharing options...
billythebellbox Posted March 25, 2008 Share Posted March 25, 2008 low end radio tat De Do Do Do, De Da Da Da. De Do Do Do, De Da Da Da Link to comment Share on other sites More sharing options...
Guest anguscanplay Posted March 25, 2008 Share Posted March 25, 2008 your posibly using a detctor selected on price not for being the best in that area's enviorment, so either increase the pulse count to max in the detector (usually a movable link on the pcb), or make that zone 'double knock' (via programmming mode) or the best idea is to replace that pir with a dual-tec detector, just be sure to follow the set up proceedure carefully for the mwd sensoer. regs alan. YER SPOT ON THAT ALAN. I WOULD OF SAID THE SAME oh dear, oh dear I usually find double knocking RADIO gear tends to negate any effect from having the system in the first place? Link to comment Share on other sites More sharing options...
arfur mo Posted March 25, 2008 Share Posted March 25, 2008 oh dear, oh dearI usually find double knocking RADIO gear tends to negate any effect from having the system in the first place? you agreed, but then where did the o/p say it was actually a radio detector or where did i say that? he/she just says a pir he has changed a couple of times in his shed is all i can see? i don't actually know of any panels all radio or hibrid panels which allow radio zones to be 'double knocked' either, but bet you do though so please name a couple even if you can, setting the pir to be always active (usually a switch or jumper choice) it would act as a wired pir, now that would have been far more informative don't you think in the public forums? oh dear oh dear was about as good as you nearly got for acuracy - best you keep to advising on keypad faults imo (if anyone has the time pmsl) regs alan If you think education is difficult, try being stupid!!!! Link to comment Share on other sites More sharing options...
Guest anguscanplay Posted March 25, 2008 Share Posted March 25, 2008 you agreed, but then where did the o/p say it was actually a radio detector eer its in the first post if you look or where did i say that? he/she just says a pir he has changed a couple of times in his shed is all i can see?i don't actually know of any panels all radio or hibrid panels which allow radio zones to be 'double knocked' either, but bet you do though so please name a couple even if you can, setting the pir to be always active (usually a switch or jumper choice) it would act as a wired pir, now that would have been far more informative don't you think in the public forums? oh dear oh dear was about as good as you nearly got for acuracy - best you keep to advising on keypad faults imo (if anyone has the time pmsl) regs alan hmm, second time in the same thread, yep thats a good idea - lets put a known dodgy PIR in a wooden shed on instant tx, batteries might last till the end of the week if your lucky ps your 490x will (yes it will - you`ed just have to be an idiot to do it) Link to comment Share on other sites More sharing options...
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