Gross Alarm

Joined
2 Jul 2008
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United Kingdom
I installed a wired home alarm 5 yrs ago. All worked well for the first 4 yrs. But I have started to get alarms at all times of the day, which indicate gross alarm? Those this indicate there's something wrong with the vibration or contact sensors?
 
First stop is to check the battery.
 
What's the best method of checking the battery, I presume you mean the large square/rectangular battery in the PCB box?
 
Yes. If it's duff it'll drag the rest of the system down. Best to check under load though.
 

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