Chris, I've had similar problems in the past with with a kitchen fluorescent starting up the PIR controlled flood outside the kitchen door. It can be due to the PIR + flood running off the same ring or spur as the flu tube or whatever. Running a separate feed for the flood is one possible fix or adding some supression on the flu tube switch fixed it for me.
Chris > -----Original Message----- > From: Chris Dupres [SMTP:[email protected]] > Sent: Tuesday, July 07, 1998 11:19 PM > To: Upson,Darrell > Cc: emc-pstc > Subject: Security light problem > > Hi Darrell. > > I've bounced your question to the group, mainly because it reminded me > of > how EMC affects every bit of our lives, even our personal habits.... > > <Were you able to fix the security light coming on whenever a certain > light was switched off? I have the same problem with an infrared > motion detector light on my garage whenever I switch off the > florescence light inside the garage. Thought I might try putting > some > ferrite beads on the power leads to the security light.> > > No, I have to confess we just live with it now. We live with the > condition that if we get up in the middle of the night to use the > bathroom, > when we turn the light on the fan timer starts. When we come out the > fan > will keep running for twenty minutes and when it turns off, the > security > light (infra-red triggered 500W halogen) will turn on for it's time > period > (15 minutes). > > Now you'll have difficulty believing this bit...Monty Python eat your > heart > out... Before the 500W halogen lamp we had a high pressure sodium > lamp > with an inductive ballast. When this switched off it would sometimes > start > the bedside radio. So the scenario was this..... > > Get up at 2.00 a.m., go to bathroom, turn on light, turn off light, go > back > to bed, after twenty minutes a bright light shone through the window > and > woke you up. If you slept through that then when the light switched > off > the radio would start. The moral of this story? If you have bad EMC > immunity make sure you use the bathroom before you go to sleep. > > Hope the beads work. This seems to be a common problem. > > Chris Dupres > Surrey, UK.
