[Hai-users] Preventing false alarms

[Byron Peebles]

And they would both want to be AUX zones, as I recall.

At 02:42 PM 7/19/2005, Thomas Brewster wrote:
>I would be interested in hearing what other people had to say on this 
>subject as I am not an expert.
>
>But I am assuming that you could set a flag on the first event (window / door)
>Then you use a startment that would set off the alarm when the flag was 
>set and the second event occured (motion sendson / etc).
>
>It has been a while since I looked over my HAI programming so please 
>forgive me if the terminology is not correct.
>
>
>----- Original Message ----- From: "David Harper" <dharper at chiaro.com>
>
>>This past week I was away on a trip when the alarm went off.  The police 
>>responded and my neighbor let them in to check things out.  They found 
>>that the alarm was caused by a motion sensor that was going off 
>>intermittantly.  When they checked the sensor, they stood and watched 
>>while a moth that had got into the house buzzed around the sensor and was 
>>setting it off! Removing the moth cleared up the problem and the alarm 
>>was reset with no further problems.
>>
>>About two months ago I had another problem where a window sensor failed 
>>and set off the alarm.  The alarm company can tell what has tripped the 
>>alarm, but they don't make any judgement calls; if the alarm goes off 
>>they call the police.  So what I'm wondering is if there is any way that 
>>I can set up the system such that it takes a combination of sensors 
>>tripping to actually set off the alarm.  Something like at least one 
>>external sensor (window, door or glass break sensor) PLUS at least one 
>>internal sensor (motion detector or an internal door) going off within 
>>five minutes of each other.  This combination seems like it would be 
>>something that is unlikely to happen accidently and would give a much 
>>higher level of confidence that the alarm was legitimate.  I went through 
>>the manuals when I got back this weekend but didn't see anything that 
>>indicated I could do this.  Is something like this possible?  If so, how 
>>would I go about it?