russbost
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| posted on 18/12/10 at 04:31 PM |
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Burgular alarm - PIR detectors
Hi Guys,
Just installing a new alarm control unit as the old one kept throwing up false alarms.
This is going to sound like a really dumb Q but how exactly do PIR's function - I assumed that when tripped they went open circuit to trip the
alarm - contacts are marked N/C which I took to be normally closed. Basically the PIR's aren't tripping the alarm, tho' the red
light comes on on the PIR to indicate it's picked you up - when I check the resistance across the blue & yellow wires (the circuit I'm
expecting to go open circuit) the resistance remains at zero even with someone jumping up & down in front of the PIR & the red light on the
PIR permanently on - both PIR's appear to be doing exactly the same thing, would be a bit coincidental if they had both packed up in exactly the
same way at the same time!!!
Any info much appreciated?
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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s6otty
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| posted on 18/12/10 at 05:04 PM |
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Have you disconnected the wires from the N/C contacts, there may be a short on the cable.
Scott
[Edited on 18/12/10 by s6otty]
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russbost
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| posted on 18/12/10 at 05:46 PM |
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yes it's exactly the same whether you test at the PIR or the control panel, with or without wires connected
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
s6otty
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| posted on 18/12/10 at 05:54 PM |
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quote:
Originally posted by russbost
yes it's exactly the same whether you test at the PIR or the control panel, with or without wires connected
Hmmm, baffled.
Are the PIR's the new ones or existing, I know you can configure the new stuff with links to tell them when to trigger, eg, 3 detections before
alarming.
Do you know what brand they are?
Scott
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russbost
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| posted on 18/12/10 at 06:19 PM |
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They are the original sensors that I fitted with the alarm about 10 years ago, not sure of the make, (alarm box says A1) the weird thing is I know the
lounge one was working a week ago as I accidentally triggered it, but when I've connected up to the new control panel everything works except
the 2 PIR's - both systems use 12V so it's not that anything has gone over voltage. I've now completely disconnectd the PIR &
with just the 12V feed wires attached it puts the led on but there is no open circuit condition across the n/c pins - I can only conclude it's
chosen this moment in time to expire - I had suspected the other PIR may not have been working for some time, so not over surprised about that one.
Is it a common thing for them to permanently latch closed?
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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s6otty
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| posted on 18/12/10 at 06:25 PM |
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Normally they just die, but it is possible.
I'd say you've had you money out of them at 10 Years!
Scott
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s6otty
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| posted on 18/12/10 at 06:28 PM |
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Just a thought, have you tested them at the panel end with the covers fitted to the PIR's?
Im wondering if they wont function while they are in tamper (no covers on)
Scott
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russbost
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| posted on 18/12/10 at 07:27 PM |
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Yes that's how I was testing them to start with, when I discovered they weren't working.
Guess I'll just order a couple of new ones, they're not dear on Ebay!
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
