Long story short, I bidded (location Australia) $22.50, on a UPS, it was down as salvage, I thought a rating of 600 would be a small ups going by the picture, when i got there, i almost did my back in just lifting it.
http://www.evansclarke.com.au/detail.asp?id=179529
So to my surprise, it had 12 12v lead acid batteries in series, but they all read less than 2v and some of them barely half a volt, no wonder it was not powering up.... also there was no power cable, so i had to do a make shift cable with crocodile clips exposed 240 volts across the floor, how fun.
Anyway, the machine sprang to life I measured the output to the batteries (12*12.5v = 150vdc) and sure enough before i even measured it i expected to be around 150vdc to correctly charge the cells, the multimeter was reading a steady 160.3v output DC.
The PCB's themselves look absolutely fine, it powered up, i could hear the relay switching when power off, everything looks perfect, absolutely nothing wrong with the UPS as far as i can tell...
But, in order to find out if it works correctly or not, i would have to supply 160vdc to see if the inverter and line filters work, the charging side works, it powers my devices when mains is connected, but that's as far as i got.
So what next?...
1. Jaycar Replacement costs.
-----------------
http://jaycar.com.au/productView.asp?ID=SB2485&CATID=18&form=CAT&SUBCATID=250
6A 12v * 12 (22.35) = $268.20
-----------------
http://jaycar.com.au/productView.asp?ID=SB2480&CATID=18&form=CAT&SUBCATID=250
1.3amp 12v * 12 (15.70) =$188.40
So remember i bought it for $22.50 lol, I COULD spend $268 and assume the inverter is working properly, and i'd have a great working inverter which would power my pc all day by the looks of it.
OR....
I can simply buy a cheaper US...
OR..
How about actually modifying it to run on say 12vdc? or salvaging it because even though it's 10 years old, there's no dust or dirt build up, it's very clean everything looks good.
Any other ideas or suggestions as to what to do with it?
http://www.evansclarke.com.au/detail.asp?id=179529
So to my surprise, it had 12 12v lead acid batteries in series, but they all read less than 2v and some of them barely half a volt, no wonder it was not powering up.... also there was no power cable, so i had to do a make shift cable with crocodile clips exposed 240 volts across the floor, how fun.
Anyway, the machine sprang to life I measured the output to the batteries (12*12.5v = 150vdc) and sure enough before i even measured it i expected to be around 150vdc to correctly charge the cells, the multimeter was reading a steady 160.3v output DC.
The PCB's themselves look absolutely fine, it powered up, i could hear the relay switching when power off, everything looks perfect, absolutely nothing wrong with the UPS as far as i can tell...
But, in order to find out if it works correctly or not, i would have to supply 160vdc to see if the inverter and line filters work, the charging side works, it powers my devices when mains is connected, but that's as far as i got.
So what next?...
1. Jaycar Replacement costs.
-----------------
http://jaycar.com.au/productView.asp?ID=SB2485&CATID=18&form=CAT&SUBCATID=250
6A 12v * 12 (22.35) = $268.20
-----------------
http://jaycar.com.au/productView.asp?ID=SB2480&CATID=18&form=CAT&SUBCATID=250
1.3amp 12v * 12 (15.70) =$188.40
So remember i bought it for $22.50 lol, I COULD spend $268 and assume the inverter is working properly, and i'd have a great working inverter which would power my pc all day by the looks of it.
OR....
I can simply buy a cheaper US...
OR..
How about actually modifying it to run on say 12vdc? or salvaging it because even though it's 10 years old, there's no dust or dirt build up, it's very clean everything looks good.
Any other ideas or suggestions as to what to do with it?