RE: Re: IR Motion detection problem

["Harry Hendriks" <hja_hendriks@xxxxxxxxxxx>]

Thanks Juan,
It is an Elro SA 230 (IR based)  type, bougth in the Netherlands.
Your assumption of the detector wall fixing in the garage  is correct.
The garage door is/was defenitely  not open when it tripped; the security
system alarm mode was on and nobody in the house.
I am now assuming (but not sure) that a changing level of sun ligth  (due
to
sun and clouds),  still coming in the garage via partly closed blinds, was
enough to cause the non intended  trippiing of the detector.
Your other suggestions of moving objects in- our outside the house are no
likely causes.
Suggestions for inprovements are much appreciated.
with kind greetings,
Harry

>From: "Juan Amador" <juane@xxxxxxx>
>Reply-To: ukha_d@xxxxxxx
>To: ukha_d@xxxxxxx
>Subject: [ukha_d] Re: IR Motion detection problem
>Date: Thu, 04 Aug 2005 08:12:00 -0000
>
>Harry, do you have details of brand/model? And precise orientation (I
>assume on south wall pointing north)
>
>Without that, is difficult to advise, but a few things to check,
>- first and foremost, we do not advise IR-only detectors - "Dual
>Technology" (IR and Microwave) are much more reliable.
>- you don'r mention whether your garage door is open or not when this
>happens, or whether the sensor is semi-exposed to outdoor whether -
>but things that can trigger an IR sensor are (as well as an insect
>reasonablu close) bird flying past - even behind a glass window;
>reflected sun (even if your sensor points north!)  Is the sensor
>visible from the street?  If so, it may even just be a pair of jockers
>with a small mirror playing games.
>- upgrade to an "outdoor" model.
>- sensors have settings which regulate how high and how far the sense -
>  you may want to change/reduce this.
>- if all else fails, you may want to replace the sensor - it may just
>be faulty.
>
>Hope this helps
>
>J Amador
>Wizard Control
>
>--- In ukha_d@xxxxxxx, "Harry Hendriks"
<hja_hendriks@h...>
>wrote:
> >
>
> > I have the following problem with the IR-motion detector in my
>garage: very
> > rare (may be once a month) it detects a very short movement
during
>daylight
> > time, when there is definitely no movement (we have no pets,
etc.).
> >
>
>
>
>
>
>