Please, excuse me for my poor English
I need your Help.
I have a big problem with an analog cameras installed in a seawater desalination plant. on some cameras I have a very white image (see attached image)
I installed : 38 analogue cameras (Messoa SCB267) + 3 Samsung 1654 DVR + on line UPS Liebert GXT3 5 kVA + a KX100 armored coaxial cable .
A common 220 VAC power supply (without earth) is installed then it split up to power on each camera, then there is a 24VDC power supply into enclosure to power the camera and fan.
The very white image doesn't have relation with camera’s settings or lens.
On one side I have 5 cameras: C1 (400 feet), C2 (600 feet), C3 (900 feet), C4 and C5 (800 feet)
The cables of cameras are installed together in underground sheaths over a distance of 400 feet (until C1) then they split up: C1, C2 and C3 on the one direction and C5 and C4 on the other direction
On the first common 200 feet I had to install the video cables near a high voltage cable (distance 3-4 feet)
At the beginning there was the problem (white image) on C1, C2 and C3 only (C4 and C5 were OK) . To solve the problem I installed a video converter (coax to FO to coax) and the problem was solved but some hours after C4 and C5 have become also white.
I have the same problem on other direction: 3 cameras were very white , I install the coax to FO converter , the 3 camera became OK but two cameras became white.
The video converters and FO are very expensive and a I can’t install another one.
Note : I have a camera with over 1100 feet coaxial cable an it’s working fine.
Thank you for your time,