Miata Mailing List: May 1993, Message #32
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   From: (none)
Subject: Re: New person w/ an electrical question..
   Date: (none)

On 9 Apr, 12:56, Gary Fischman wrote:
> Subject: Re: New person w/ an electrical question..
> 
> I have an alarm that has some sort of motion detector, but I don't know
> if its microwave or ultrasonic.  What I *do* know, is that I had to 
> reduce the sensitivity since it was going off every time it rained.  Now
> the sensitivity is so low, that its difficult to set off.  It *should*
> trigger anytime someone reaches into the car.
> 
>-- End of excerpt from Gary Fischman


It sounds a bit like mine.  It has an ultrasonic motion detector and works 
quite well with the top down, i.e. someone putting their hand inside the 
car sets the alarm off.  Of course, the main purpose seems to be to scare 
off people admiring my leather seats who reach in to stroke them! 

However, when it rains heavily (and the top is *up* ;^) the top bounces 
and sets off the alarm.  There is a sensitivity adjustment screw, but this
is under the steering column, so not very convenient to adjust very often
(I carry a small screwdriver for the purpose).  Now, if the adjustment 
was some sort of knob or thumbwheel on the dash, it would be a pretty 
good setup.  I believe Mazda in the UK sell one like this.

A friend of mine has a microwave proximity device in his Honda Del Slo,
and he has had over-sensitivity problems with that.  When a bird got too
close the car would chirp at the bird!

-- 
-- Paul Jasper
-- RATIONAL
-- Object-Oriented Products
--