Re: PIR's: Why trip on two detects?

[Frank Olson <Use_the_email_links@xxxxxxxxxxxxxxxxxxxxxx>]

Total nerd wrote:
> Yes, that's what I have.  I set it up to use both MW and PIR and trip
> on one detect.  The thing keeps flashing and going into trouble (or
> masking).  It works most of the time but then, out of nowhere, it
> starts flashing.  The manual says to move into it's field to reset it
> (that works) and if it keeps happening, it's defective.  Ever have a
> defective one of these out of the box?  Or is it set wrong?  It might
> be set to a longer range than the room it's in.  Is that a problem for
> these things or it shouldn't matter?
>


It definitely matters.  Try adjusting the range on that part of the
sensor so that only movement within the protected space will set it off.
  Microwaves tend to "ignore" walls and you may be picking up traffic
from outside which is setting off only one part of the sensor.  The
"fuzzy logic" may be looking for confirmation on the PIR side and when
it doesn't get it, it goes into "trouble" because it assumes one side is
blocked (or masked).