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Or get better equipment

It is usually me that gets it wrong, I read it quite a few times too, couldn't believe I was right for once

open then then close the door after replacing the lid (if you have the lid on properly?)

Plastics?

Hello Everyone, After a very long renovation and subsequent complete rewiring of the alarm system, I have returned to activating the lightsys alarm. Unfortunately, however, some door opening detection sensors, connected via radio, continuously give the tamper alarm. In particular, 3 sensors out of 9 have this problem. What could have happened? I have already changed all the battery. Thanks for your availability. Best regards Simone

I suppose it makes a change from the gay jokes

dementia, quite common at your age....

I cant believe I missed that I went back and re read it as well just to be sure

You are not reading what he typed correctly he typed "with the panel and sensors pulling 0.55 A" Now there was no mention of mA so 0.55A no matter how you try to dress that up is slightly over half an amp. He may have made a mistake but either way what he typed is 0.55A not 0.055A which would be 55mA

Theres 1000 mA to an amp not 100 550mA would be half an amp (well over half an amp)

So I'm thinking this low measurement could be due to voltage drop on the connecting leads (which could amount to a few tenths of a volt at that current). The panel will only measure voltage at the board during a load test.. Next step is to check voltage at the actual terminals of the battery.

if the float charge is only 22 mA, it could take more than 24 to fully charge the battery, depending on its initial charge state. It is a 7 Ah battery.

I've got 5 PIRs (older ones so current consumption might be higher than newer ones). Also 6 shock sensors, a wired bell and two wired keypads. That's 14 devices (and there's also the panel itself that has to be powered), so if they're pulled a few tens of milliamps, it could add up. I'd have to check all the specs to see what the current consumption is.

So I left it for 3 days and performed a longer test this time. After ten minutes pulling 0.55 A, voltage stabilised at 11.9 V. (it was at 11.9 V after around 2 minutes).

It should recharge within 24 hours. Also needs to, to comply

Yep I'd also assume the PIR's are in Auto and sleeping. Door contacts shouldn't do that unless you have programmed them incorrectly. They default to always awake.

Thats half an amp in my book

He said 55mA not 550mA

Two things of note here, if your panel is pulling over half an amp quiescent that seems quite high to me and also if your new battery is dropping to 12v under load I would suggest its not a good battery.

Most likely because you are activating the devices just before or during the setting procedure. Wireless devices will go to sleep for a short period after activation to conserve battery life. If you try triggering a device that has not activated recently you should find the system will respond almost immediately.

I'll see if I can find some charge/discharge curves. Presumably if the battery was sitting on a shelf in a store, it may have self-discharged somewhat. Not sure what the self-discharge rate is for lead acid, but 12.9 V would have indicated that it was fully charged, but maybe not. I guess there's some variability. The panel is trickle charging it at 22 mA. That figure was 38 mA for the 6 year old battery (which I thought was a Yuasa, but it was an Interlogix. I presume these are just badged and there are a limited number of battery manufacturers)

I’m after putting a new 12 V, 7 AH lead acid battery into my alarm panel. Off load voltage was 12.9 V at the battery terminals before fitting. A fully charged 12 V battery should read around 12.8 V. When I did a load test, with the panel and sensors pulling 0.55 A, the voltage eventually dropped to 12.0 V before I stopped the test after a few minutes (the voltage fell faster at first). Float charge voltage for a lead acid battery (and from a panel) is typically 13.8 V. So just wondering since the battery isn't charged in a three state mode by a panel like a normal charger would charge it (constant current, constant voltage and then trickle maintenance charge), how long typically does it take a new battery to fully charge? I've seen figures of 24 to 48 hours mentioned.

Bell delay? Or something?

Ive installed my self but it takes ages before it sets of the alarm and thats me walking by all the IR Beams and door contacts Does anyone know the most likely reason for the lengthy delay before the alarm sounds? maybe 1-3 minutes not timed it yet