Re: Re: Alarming the garage

[Frank Mc Alinden <fmcalind@xxxxxxx>]

Hi Paul


>I thought that the point of dual tech sensors was that >they only
trigger if BOTH microwave and PIR have been >triggered  - meaning the
microwave and branches bit will >not matter unless the PIR triggers
falsely at the same >time?

Havent installed / played with them in a long time but from memory they
also will alarm if say there is more than one hit on the same sensor ie 2
hits from the pir within a duration....If this is the case and you get a
false alarm which one was the culprit....and i bet the microwave
sensitivity gets turned to minimum on a lot of sensors........

Frank

----- Original Message -----
From: Paul Gale
To: ukha_d@xxxxxxx
Sent: Tuesday, September 09, 2003 9:22 PM
Subject: RE: [ukha_d] Re: Alarming the garage


I implemented a 'multi tap' scheme with a number of my PIR sensors in
Comfort due to some false alarms. If a sensor triggers it will only cause
an alarm if the same or another sensor triggers within an hour. Works well.

I thought that the point of dual tech sensors was that they only trigger if
BOTH microwave and PIR have been triggered  - meaning the microwave and
branches bit will not matter unless the PIR triggers falsely at the same
time?
Paul.

-----Original Message-----
From: Frank Mc Alinden [mailto:fmcalind@xxxxxxx]
Sent: 09 September 2003 11:42
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Re: Alarming the garage

Hi John

>btw the windows aren't that big - maybe 600 x 600 each, >but
>branches waving outside them might be interesting...

Yes the microwave might see the moving branches.........

Can you not look for multiple hits on the pir/ dualtec via Comfort Scripts
before triggering the Alarm system to reduce false alarms?????

>p.p.s. should I be using stranded or solid cores, and >screened or
>unscreened ??

I use stranded unscreened ..havent seen the screened alarm cable here in
Melbourne....



HTH
Frank
----- Original Message -----
From: etj_webster
To: ukha_d@xxxxxxx
Sent: Tuesday, September 09, 2003 8:31 PM
Subject: [ukha_d] Re: Alarming the garage


--- In ukha_d@xxxxxxx, Frank Mc Alinden <fmcalind@b...> wrote:
> Hi John
>  Probably going against the grain here but just my opinion....
> Personally im not a great fan of Dualtec sensors...
> Two technologies..... two things to go wrong...
> You would also need to be careful with the Microwave sensor
> setup as it can penetrate through walls...
> The vibration sensors and glass break detectors and roller door
> contacts already suggested i would also recommend...
> I would personally use good quality pirs....
> although a little concerned with the amount of glass...

Frank,
points well noted.

I had heard of the dualtec sensors being a bit of a b_gger to
set up (probably due to the external sensing you talk about).
We have a lot of wildlife around our place (foxes, pheasants,
deer, etc) so this could be a problem. Mind you presumably
only if the pir detected them too...

btw the windows aren't that big - maybe 600 x 600 each, but
branches waving outside them might be interesting...

I think I'll get one dualtec and give it a try. If it goes off
while I wander around outside the garage then I'll probably send
it back...

Cheers,
John.
P.S. any recommendations on places to get alarm cable from at a
sensible price. I think I might needsome more...
p.p.s. should I be using stranded or solid cores, and screened or
unscreened ??