Re: Different false alarms

[Frank Mc Alinden <fmcalind@xxxxxxx>]

Hi Paul....

>I’ve had 3 false alarms in the last 2 weeks (two of them
yesterday/last
night) – much >to the annoyance of my neighbours I think :-(

Was it the same zone that alarmed both times ????..Any windows opened or
draughts ....???

>I have quite a few PIR’s and a mix of Pyronix Magnum
Ultra’s and
>Swisstec/Alarmcom IR120C, both of which are meant to be high-quality
PIR’s
(well, >so I’m told).

I have used the Alarmcom IR210 and IR220 (a few years back now ) and these
were excellent detectors installed quite a few in large retail
outlets.........

>1 Most of the PIR’s are set to their most sensitive settings (as
I was also
using them >to trigger automated lighting via HV – serial link
from Comfort
to HV). I guess these >need to be ‘upped’ a bit to more
stable settings?

Dont think is is a good idea to have them super sensitive......you should
probably use another detector for lighting control

>2 The zone types were set to a sensitivity of 100ms for these sensors
– I
set to 500ms >this morning. Is this important at all?

This is the time i assume the detectors must be unsealed for before comfort
decides the sensor is in alarm....My thoughts would be 200mSec would be
suffice ??

>I was also wondering whether I should set all my PIR zones to be a
‘perimeter’ type >as I believe you then need two or more
activations to
trigger an alarm – Is this good >to do or not?

Can you not do this in your Comfort Scripting ??? So if  Home mode is on
then look for 2 trips on a zone within say 10 seconds ??.........


>We also have a huge infestation of ‘storm bugs’ –
the tiny little black
bugs that get >everywhere (including under the screen of my LCD TV!!!)
– can
such a small insect >cause a PIR to trigger? I know spiders etc can but
these bugs are very small.

Wouldnt think so unless they are actually inside the detector.........???
Make sure all cable entries to the detectors are sealed ........

>What temperatures are the electronics tested to?

I would *guess* that most electronic stuff would be rated up to 50 C.....


Frank




--- Original Message -----
From: "Paul" <p-gale@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Thursday, July 10, 2003 6:38 PM
Subject: [ukha_d] Different false alarms


This is a cross-post from the comfort-technical groups as I know there are
a
few alarm guru’s here that don’t necessarily monitor that
group:


Hi All,

I’m suffering from false alarms at the moment too (but probably of
my own
making!). I’ve had 3 false alarms in the last 2 weeks (two of them
yesterday/last night) – much to the annoyance of my neighbours I
think :-(

I have quite a few PIR’s and a mix of Pyronix Magnum Ultra’s
and
Swisstec/Alarmcom IR120C, both of which are meant to be high-quality
PIR’s
(well, so I’m told). When I was woken at 2am this morning I decided
to look
at my configuration again and found the following possible problems:

1 Most of the PIR’s are set to their most sensitive settings (as I
was also
using them to trigger automated lighting via HV – serial link from
Comfort
to HV). I guess these need to be ‘upped’ a bit to more stable
settings?
2 The zone types were set to a sensitivity of 100ms for these sensors
– I
set to 500ms this morning. Is this important at all?

I was also wondering whether I should set all my PIR zones to be a
‘perimeter’ type as I believe you then need two or more
activations to
trigger an alarm – Is this good to do or not?

We also have a huge infestation of ‘storm bugs’ – the
tiny little black bugs
that get everywhere (including under the screen of my LCD TV!!!) –
can such
a small insect cause a PIR to trigger? I know spiders etc can but these
bugs
are very small.

My Comfort enclosure and slave panel are mounted in Node0 which gets
extremely hot (working on an air extract system now) – Could high
temperatures cause false alarms? What temperatures are the electronics
tested to?

Your thoughts would be most welcome (and maybe help me get more sleep!)

Paul.





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