PeterJames

some

Agreed, the type of detectors that were around when the Rascal was produced would be prone to sunspots with no white light filter. The Bellbox may also be a problem on hot days polycarb was much thinner and expands when it gets hot causing tampers faults. If the panel powered up okay on mains first I would say the battery although it may be showing the correct voltage is probably fecked (Technical term for no good)as its drawing more current than the PSU can supply. Assuming that the wiring was installed well, that would be the only thing I would look to be saving from your system. If not, well.... wireless systems are pretty good nowadays.

Try recycling the power without connecting the battery

something like this but we can buy it with a calibration cert Ill ask on Monday what the part number is https://cpc.farnell.com/tenma/72-13430/dmm-handheld-auto-manual-2000/dp/IN08405?st=calibrated digital multimeter

£40 for a meter and twenty minutes per eng meter versus 9x £30.00 plus P&P

Ours is ACT in a big case, it wouldnt be hard to make something, but it wouldnt make the job any easier.

Its cheaper to buy a new calibrated meter than pay the postage to and from for your meter, before you have even paid for it to be calibrated. Farnell sell a calibrated meter with cert for around £40.00. TBF calibration is a PITA you have to get all the meters in to check them all, we give out a loan meter while the engineers is being calibrated and trying to organise getting them swapped around is like hearding squirrels sometimes. You have to get the loan back before you can do the next meter. To calibrate you need something to check current, resistance, voltage, ect, against a known calibrated meter. There is no other easy way to check calibration to my knowledge you cant just put it on a machine that does all that for you, you have to change the settings on the meter for starters. + or- 10% is acceptable

The new meter comes with a calibration certificate its calibrated at Farnell. We reuse the last years meter either in the office, I sometimes give them out to engineers when theirs fails or they lose their meter, or leave it on top of a van or whatever they do with them.

We use one of those but the bigger version We buy a new calibrated meter every year and check calibration against that

The would normally go across a large doorway or similar the modern version would look like below

They look like early IR beams transmitter and receiver.

Good old Github

Thats because Ubiquity makes lots of stuff you just need a txer/rxer that suits your needs. But if you have power at the camera end then yiu could just use a POE as others have suggested

Sorry the dodgy website in your link looked as if it was the type that would use a gmail address, you should have done the same when signing up here LOL

Also if youre going to covertly advertise tat, its best you dont use the same email address as you website

Ubiquiti Wireless would be a better choice

I think sometimes people try their luck with Ebay I can see anyone paying that sort of money for one when you can buy a new panel and keypad for a little more. I cant recommend a panel as the ones we install are not really diy, but plenty of people seem to like Scantronic ION and its a brand that bin around for years

I gave it some thought......for about ten seconds

This is why to be admissible in court the recordings have to be in original format and watermarked. MP4 is okay for minor crimes where in most cases the crim puts his hands up when he sees the footage because he doesnt know the rules. But if you need evidence that sticks it must be in original format

As above the relay wont have power on it, its just a switch to make the fan work you need to put power to it, but I guess this is not your objective. If you dont have a meter put one side of the fan to 0v put the other side of the fan to n/o and put 12vdc to the common then test it.

I would say it would stop the panel tamper activating but not the sounder from alarming

Not only that if he tells the OP the engineers code, the the OP has the engineers code for all of his customers systems. this would leave customers vulnerable, its a bit like ford telling customers a back door into the programing of their cars can you imagine the consequences

put a recorder in both buildings or use a ubiquity bridge