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If your an alarm co. you must be pulling out better controls out than your 9600? If your not check out my ebay a/c....

I did read your later post correctly. I was explaining the reasoning behind my initial post. Maybe re-read what I have posted as clearly the point of calculating standby time has gone unnoticed. There is no "spec" for the panel, merely some information copied from an old manual that is irrelevant to the point I was making above. Either way running the second bell as SCB would be the correct choice IMO. You would have to measure the temperature of the cab with it shut to be certain. Can't imagine anything much above 30C even with poor air flow. Probably not. Probably yes. I am You shouldn't be loading it anywhere near maximum rating, as above. I have already said, significant extra current will not be drawn from the bell trig for the extra sounder. Plenty of experience with them, from the jokes above you can see most would have it heading for the skip. Maybe, I wouldn't try. There pretty bombproof from experience. An additional PSU like explained Eh? How does that change the system output current. You can draw approx 1A from the panel, that would be the total of all the powered devices on the system. Anytime tl;dr - I would suggest you stick the bell up in SCB, make sure you connect your tampers between the bells correctly and move on to the next job.

no, after using the old abacus radio system we moved to Risco (2005ish) ... I'd charge for corrective visit & a new pir (if its very early system it may be old pcb in new case) I'd then offer you basic or fully comp maintenance, Like the radio abacus topic of the other day the equipment is stable but quirky a competent engineer with suitable experience of the product & its piece of piss

We need another engineer, after getting rid of another total muppet this week. we seem to have had a run of pricks working for us lately.

a "cp8l" with a wireless expander, oh dear if the battery has more than 2.8v its either the pir or the connections on the battery a simple solution is buy an alarm with fully comprehensive maintenance,

Try Williams http://www.w-e.co.uk/index.php/contact-us

Obviously an avid reader..

brummy is my first language sire

Second that, once caught glimpse of a baby being preped for embalming, while doing a walk test.