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Motion Sensor internals - jumper question

Discussion in 'Alarms, CCTV & Telephones' started by dishman, 16 Jan 2020.

  1. dishman

    dishman

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    I was doing a bit of painting.....so had to get the alarm sensors free to paint around them better. I also decided to spray the, now yellow, covers.

    To do this I clearly had to take the covers off.

    While pulling some off, on one or two, a small black jumper fell out. Now.....at first I thought this must be pretty important....but then I noticed at least one of them did not have a jumper in this particular position at all.

    Then....on closer inspection....I noticed that the jumper in question...as far as I can see...is not bridging any connections.

    So....I am now assuming the sensors all contained at least one spare jumper, and this was just a location to store it without bridging connections.
    fireplace-7741.JPG fireplace-7741-2.JPG
    This is once sensor with all the jumpers in their original position. I am looking at the jumper in the top right....the second image is a close-up of this area.


    fireplace-7738.JPG fireplace-7738-2.JPG
    In this sensor.....the jumper fell out.

    So based on the first picture.....can I get some confirmation it was just a spare? I assume to change the function in some way if required (hence it being put in a unused position).

    Lastly.....have I caused myself any issues by removing the cover? This obviously tripped a tamper alarm which i disabled with my code.

    However, I read on here that this can cause issues without the master code. This may have been referring to removing the sensor completely, rather than just the cover.

    I think i do have the master code......but wanted to check if I have had inadvertently caused myself a lot more issues if I don't.

    Many Thanks
     
  2. sparkymarka

    sparkymarka

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    Hi / med / lo .....sensitivity jumper ....off being low
     
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  4. dishman

    dishman

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    Interesting.

    But....if the jumper is just over a single pin, what is it making contact with and/or bridging to affect the sensitivity?

    Surely having a jumper over a single pin is the same as not having one on a pin.

    Also, is there usually any tamper issues with regard to removing the cover if it turns out I do not have an engineers/master code?

    Regards
     
  5. sparkymarka

    sparkymarka

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    Think about it .....3 pins ....pin 3/2 one setting 2/1 another ....no pin the last ....it’s not rocket science ...
     
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