mountianrider Posted September 27, 2015 Posted September 27, 2015 I've taken over a visonic system, owner has no idea when it was serviced. Which leads me to ask the question, how often should they be changed? (CR123, Bell etc?) I meter the batt and change if below 2.8v but rule of thumb? Quote
Adi Posted September 27, 2015 Posted September 27, 2015 2.8/2.7 is the threshold of low battery. if 2.8 i doubt they wouldlast until next rmv. 2 years for now, although most vis devices will get 3 oor near to 3 years,, not worth the ballache, swap at 2. Quote I really can't be ar**** with it anymore.
mountianrider Posted September 27, 2015 Author Posted September 27, 2015 thanks bud, I was on the right track! Quote
james.wilson Posted September 27, 2015 Posted September 27, 2015 a volt check means nowt, you never did that on the sla as a good test. Depends on the gear experience will out. Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
Adi Posted September 27, 2015 Posted September 27, 2015 Why i typed now i dont know, i meant me. on site test for lithium is volts. Quote I really can't be ar**** with it anymore.
james.wilson Posted September 27, 2015 Posted September 27, 2015 means nowt as yu know Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
sixwheeledbeast Posted September 28, 2015 Posted September 28, 2015 Yearly for CR's, 2 years for Bells, here on that kit. Quote
james.wilson Posted September 28, 2015 Posted September 28, 2015 The problem is a litium cell will loose approx 0.5 - 2% of its capacity a year depending on brand. Couple this with the low power draw of wireless devices the curve just drops of completely very quickly. The difficulty for the manufacturers is at what point do thy report a low battery. Too early and it looks like its running out of batteries, too late and the low battery running time is either very short of non existant. The low voltage volts will depend on the manufacturer and cannot imo be the same for all manufactures. I suppose the answer is to have it programmable so the maintainer can choose when it goes into low battery and how long it will function for in tht state before the supervision failure Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
RichL Posted September 28, 2015 Posted September 28, 2015 The problem is a litium cell will loose approx 0.5 - 2% of its capacity a year depending on brand. Couple this with the low power draw of wireless devices the curve just drops of completely very quickly. The difficulty for the manufacturers is at what point do thy report a low battery. Too early and it looks like its running out of batteries, too late and the low battery running time is either very short of non existant. The low voltage volts will depend on the manufacturer and cannot imo be the same for all manufactures. I suppose the answer is to have it programmable so the maintainer can choose when it goes into low battery and how long it will function for in tht state before the supervision failure cr123.jpg Where did you get the data/graph from JW, is it something I can repost elsewhere? Quote Originally said by Charles Babbage On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.
james.wilson Posted September 28, 2015 Posted September 28, 2015 http://www.powerstream.com/cr123a-tests.htm Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount.
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