Deltaseven Posted October 21, 2004 Posted October 21, 2004 We have a site with a single Care-tech 2300 running 17 detectors on screened cable. The system has been in for several years (as you would guess from the panel), and we have had no major problems. I recently went to site to deal with some device tampers showing. The log showed several twin devices, zone tampers etc, but the system was stable from the time I arrived on site to the time I left. I checked the most likely biscuits (numbers showing tamper / twin and the previous number), and they all checked fine (near to 82K resistance), and all checked out fine on the ID meter. Both ID lines check out fine on ID meter. So, not having found a fault, I left both lines disconnected for 10 mins to run down any induced a/c or capacitance, then reconnected with ACT ID line filters. Site was OK for 3 days, then faults started again. I went to site and replaced every biscuit with ID Plus biscuits (which Castle assure me are 100% OK with the panel). I also replaced one corroded M/C, which I thought could be causing a problem. I left the capacitors in the detectors furthest away from the panel. (Not sure now whether they are required for ID Plus?) Problem has now come back (after 2 days) - but the customer reports that the tamper is on a zone which has not caused a problem before. I am hoping that maybe I haven't put the cover on the detector properly, or something simple, but think that may be wishful thinking!! Anyone got any experience with ID Plus on these old panels? Should I have left the capacitors in or removed them?
Guest Posted October 22, 2004 Posted October 22, 2004 Why capacitor on the ID - line??? I have understood that capacitance is very harmful for data.. (Or maybe we have different kind of ID - systems here..)
Deltaseven Posted October 22, 2004 Author Posted October 22, 2004 No junction boxes anywhere - cable to each device run direct from the panel or from the nearest detector. I had considered this - thought maybe it was moisture in a JB - but no such luck! Georg - don't know the reason for the capacitors, but on the first ID systems from Castle Care Tech, they have found that a 1.03mF cap at the end of the longest run on each data line increases stability and reduces tamper faults. I went back to sit today and found the log had a few instances of Twin device on Zones 5 + 6, so I changed ID biscuits 4, 5, 6. I also removed the capacitors from the end of line. Strange thing in the logs though, the unit recorded some twin devices at impossible times, seemingly random dates in the middle of yesterday's log, and at times like 27:63:24. So I could be looking at a faulty NVM chip. I have cleared the log, so will see if that one comes back! Is it possible that a faulty NVM could cause twin device faults on the ID line? Castle tech-support are stumped, and so am I! Any advice gratefully received! D7
Guest Posted October 22, 2004 Posted October 22, 2004 ...Strange thing in the logs though, the unit recorded some twin devices at impossible times, seemingly random dates in the middle of yesterday's log, and at times like 27:63:24. So I could be looking at a faulty NVM chip. I have cleared the log, so will see if that one comes back! Is it possible that a faulty NVM could cause twin device faults on the ID line? 28579[/snapback] I was reading a log few weeks ago where it stated autoarm at the time when there should have been auto DISarm ( I don't like autoDISarm but customer simply refuses this practise regardless my threats ). Programming was ok (uploaded it to see if i would have made a mistake).
Paul Giles Posted October 23, 2004 Posted October 23, 2004 Sounds like the old castle fault delta! Might be worth changing it for a menvier ID or galaxy if wiring allows PG Security Systems Somerset SSAIB Certificate of Merit Installers. www.pgsecurity.co.uk
Guest Posted October 23, 2004 Posted October 23, 2004 a faulty battery pulling too much current can cause all sorts of weird faults to show!
Guest Posted October 23, 2004 Posted October 23, 2004 Also, any taxi companies or new transmitters in the area - or CB stations can cause RF induced interference even with the end of line filter capacitor in - so check for new arials/transmitters in the area!
Guest Peter James Posted October 23, 2004 Posted October 23, 2004 We recently had the same problem in a factory. The new neighboors turned out to be metal fabrication with massive welders. We tried everything and ended up rewiring eol and replacing the panel. That fixed it and I wish we did that 1st cause it cost us a fortune in filters and stuff that did nothing.
Guest Posted October 24, 2004 Posted October 24, 2004 I agree Peter - I had a menvier 690ID system which developed mysterious faults - turned out a local taxi company had started up, I persued the relevant DTi authority and they could do nothing as the companies transmitter complied with regs. I ended up replacing the system with a 690M double poled. I hope this is not the case for the above chappy though
Guest Posted October 24, 2004 Posted October 24, 2004 Does anyone know the protocol that ID's use? Just wondering because I haven't ever came across with this kind of problems..
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