I have installed a motion sensor light in our dowstairs toilet (thanks,
but I've already made all the jokes!).

It is apparently a good quality one - a Steinel from CPC
(https://secure3.farnell.com/jsp/ende...sp?sku=LA02529)
It is in effect a straightforward ceiling light with the PIR neatly
built into it.

I've been battling with the settings for a couple of months now. What I
don't understand is how, when the room is effectively a sealed chamber
no more than 3 foot by 6 foot, with no windows and the doors shut, it
should come on by itself. Our bedroom is directly above and I can hear
it clicking on in the middle of the night. I can understand it may be
sensitive to sharp blasts of warm wind for example (haha, again), but
in the still of the night? Whatsmore, the sensitivity is turned down to
such an extent that my 6 year old has to jump up and down like a
lunatic to activate it!

Any ideas what might be causing this? I could of course just replace it
all with a regular lightswitch, but where's the fun in that?!

On 26 Dec 2006 10:58:11 -0800, wrote:

What I
don't understand is how, when the room is effectively a sealed chamber
no more than 3 foot by 6 foot, with no windows and the doors shut, it
should come on by itself.

Quite often this is caused by mains interference, usually something
like a fridge/freezer or the central heating which generates nice
spikes when it switches on and off.
--
Peter Parry.
http://www.wpp.ltd.uk/

wrote:

I have installed a motion sensor light in our dowstairs toilet (thanks,
but I've already made all the jokes!).

It is apparently a good quality one - a Steinel from CPC
(https://secure3.farnell.com/jsp/ende...sp?sku=LA02529)
It is in effect a straightforward ceiling light with the PIR neatly
built into it.

I've been battling with the settings for a couple of months now. What I
don't understand is how, when the room is effectively a sealed chamber
no more than 3 foot by 6 foot, with no windows and the doors shut, it
should come on by itself. Our bedroom is directly above and I can hear
it clicking on in the middle of the night. I can understand it may be
sensitive to sharp blasts of warm wind for example (haha, again), but
in the still of the night? Whatsmore, the sensitivity is turned down to
such an extent that my 6 year old has to jump up and down like a
lunatic to activate it!

Any ideas what might be causing this? I could of course just replace it
all with a regular lightswitch, but where's the fun in that?!

hard to see how its anything but faulty, since you say the
sensitivity's turned down. Unless it can see through a glass door at
the cat walking past, but thats unlikely if the 6yo has to jump about..


NT

wrote:
I have installed a motion sensor light in our dowstairs toilet (thanks,
but I've already made all the jokes!).

It is apparently a good quality one - a Steinel from CPC
(https://secure3.farnell.com/jsp/ende...sp?sku=LA02529)
It is in effect a straightforward ceiling light with the PIR neatly
built into it.

I've been battling with the settings for a couple of months now. What I
don't understand is how, when the room is effectively a sealed chamber
no more than 3 foot by 6 foot, with no windows and the doors shut, it
should come on by itself. Our bedroom is directly above and I can hear
it clicking on in the middle of the night. I can understand it may be
sensitive to sharp blasts of warm wind for example (haha, again), but
in the still of the night? Whatsmore, the sensitivity is turned down to
such an extent that my 6 year old has to jump up and down like a
lunatic to activate it!

Any ideas what might be causing this? I could of course just replace it
all with a regular lightswitch, but where's the fun in that?!

Moths?.

We had a helluva time in one office when birds nested there..they used
to fly from and two the nest, right next to a sensor..

was thinking very hard :
Any ideas what might be causing this? I could of course just replace it
all with a regular lightswitch, but where's the fun in that?!

Try covering the sensor head up so it can see nothing. If it still
false triggers that can only mean that it is being triggered by mains
spikes or it is faulty. Mains spikes can be caused by fridges, heating
systems starting and etc.. Another possibility is poor connections to
the unit, or a poor earth.

If covering its head stops the problem then you need to look at the
movement of surfaces which have a difference in temperature to their
surroundings, or surfaces which can suddenly change temperature. Drafts
under doors, radiators heating up and etc. can cause this.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.co.uk

In article . com,
writes
I have installed a motion sensor light in our dowstairs toilet (thanks,
but I've already made all the jokes!).

It is apparently a good quality one - a Steinel from CPC
(https://secure3.farnell.com/jsp/ende...sp?sku=LA02529)
It is in effect a straightforward ceiling light with the PIR neatly
built into it.

I've been battling with the settings for a couple of months now. What I
don't understand is how, when the room is effectively a sealed chamber
no more than 3 foot by 6 foot, with no windows and the doors shut, it
should come on by itself. Our bedroom is directly above and I can hear
it clicking on in the middle of the night. I can understand it may be
sensitive to sharp blasts of warm wind for example (haha, again), but
in the still of the night? Whatsmore, the sensitivity is turned down to
such an extent that my 6 year old has to jump up and down like a
lunatic to activate it!

Any ideas what might be causing this? I could of course just replace it
all with a regular lightswitch, but where's the fun in that?!

What type of bulb?
--
John Alexander,

Remove NOSPAM if replying by e-mail

Harry Bloomfield verbally sodomised in
:



If covering its head stops the problem then you need to look at the
movement of surfaces which have a difference in temperature to their
surroundings, or surfaces which can suddenly change temperature.

FILTH!



--
Phil Kyle™

T
h i
i s
s l
f i l
S o n o
i u e n
g r s g