So Dave, your alarm activates internally for 10 seconds and then stops on its own. This is a out right guess, some how you have managed to put the chime function on your panel. Just turn the option off,
As for your battery, alarm batteries are designed to last between 3-5 years only, dont tell me its fine, because it wont be.
Regards
Nick 07842 480037 Burglar alarm engineer with 25 years experience
Nick
January 2010