Omnicron 9000

[Dave Plowman (News)]

Have one of these alarms which I self installed many years ago. Found the original instructions - both installation and user.

Need to change a faulty sensor, but can't stop it going off when I open it up - the 24 hour circuit.

I can get it into engineering mode, but can't for the life of me find instructions on how to totally disarm it. I've left it in that mode with the power turned off and will wait until the battery goes flat if no one has a better idea.

[ARWadsworth]

If you know the layout of the innards of a bellbox then you know where to cut a hole in the cover to expose the electrics without activating the tamper. You can do whatever you want when you have access to the terminals and the alarm is not sounding.