RE: Different false alarms

["Paul" <groups@xxxxxxx>]

Thanks Frank.

They have all been different sensors. I guess the most likely reason so
far=
is the sensitivity settings - I'll change them all today and ditch the aut=
omated lighting functions (which never were responsive enough anyway!).
The=
re were windows open on one occasion (but not much breeze as far as I can
t=
ell). As to the 'perimeter' settings in Comfort - this is a standard
featur=
e - I was just wondering whether it's a good idea to set the PIR zones to
t=
his type or not.

Cheers,

Paul.



-----Original Message-----
From: Frank Mc Alinden [mailto:fmcalind@xxxxxxx]=20
Sent: 10 July 2003 10:00
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] Different false alarms

Hi Paul....

>I=92ve had 3 false alarms in the last 2 weeks (two of them
yesterday/last
night) =96 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=92s and a mix of Pyronix Magnum Ultra=92s and
>Swisstec/Alarmcom IR120C, both of which are meant to be high-quality
PIR=
=92s
(well, >so I=92m 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=92s are set to their most sensitive settings (as I
was a=
lso
using them >to trigger automated lighting via HV =96 serial link from
Comfo=
rt
to HV). I guess these >need to be =91upped=92 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
=96 =
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
=91perimeter=92 type >as I believe you then need two or more activations
to
trigger an alarm =96 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 =91storm bugs=92 =96 the tiny little
bl=
ack
bugs that get >everywhere (including under the screen of my LCD TV!!!)
=96 =
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=92s here that don=92t necessarily monitor that group:


Hi All,

I=92m suffering from false alarms at the moment too (but probably of my own
making!). I=92ve had 3 false alarms in the last 2 weeks (two of them
yesterday/last night) =96 much to the annoyance of my neighbours I think
:-=
(

I have quite a few PIR=92s and a mix of Pyronix Magnum Ultra=92s and
Swisstec/Alarmcom IR120C, both of which are meant to be high-quality
PIR=92=
s
(well, so I=92m told). When I was woken at 2am this morning I decided to
lo=
ok
at my configuration again and found the following possible problems:

1 Most of the PIR=92s are set to their most sensitive settings (as I was
al=
so
using them to trigger automated lighting via HV =96 serial link from
Comfor=
t
to HV). I guess these need to be =91upped=92 a bit to more stable settings?
2 The zone types were set to a sensitivity of 100ms for these sensors =96 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
=91perimeter=92 type as I believe you then need two or more activations to
trigger an alarm =96 Is this good to do or not?

We also have a huge infestation of =91storm bugs=92 =96 the tiny little
bla=
ck bugs
that get everywhere (including under the screen of my LCD TV!!!) =96 can
su=
ch
a small insect cause a PIR to trigger? I know spiders etc can but these
bug=
s
are very small.

My Comfort enclosure and slave panel are mounted in Node0 which gets
extremely hot (working on an air extract system now) =96 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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