I was wondering if I could get some suggestions or ideas on how to fix an ongoing issue we are having with a CCTV system in a horse ranch in Scottsdale AZ.
I'm a low voltage systems/AV integrator in the Phoenix/Scottsdale area and have "inherited" a client's existing CCTV system. It's been up for over 5 years but the issue is relatively new (at least to the extent that it is now). The system includes 2 IC Realtime DVR's (16CH/8CH) and 24 analog cameras (12V & 24V). It's a fairly large horse ranch in our local desert with cameras spread out throughout the ranch. Wiring is originally CAT5 & 18/2, though the main building uses RG59 as well. Some of the CAT5 outdoor is buried and some is running inside metal fence tubing before running up metal conduit and/or posts.
Back in September, during a rain storm with lightning, 8 cameras went down (a mix of brands and locations). No surge protector was tripped, DVR's kept working, no sign of damage anywhere except 8 cameras were for all intents and purposes "broken". All the cameras were outdoor cameras mounted on poles or metal frames for pens, arenas, fences... After testing all video lines and power supplies, I replaced all the cameras with quality analog equivalents (self-branded by a lesser known reseller in Las Vegas with whom I have done business for a while). Checking the DVR feeds, it was clear that all cameras went down at exactly the same time (during the rain, middle of the night). The picture seemed to flash bright and then went black).
I just got a call from my client a couple of days ago that 6 cameras were out. it turns out all 6 were part of the group I replaced recently. So I went straight to the recordings and again found that all cameras that were recording at the time went out at the same time on the same day. Except this time, no rain, no lightning, and it was during the day at around 4 PM.
Needless to say, after replacing the first batch of 8 cameras at cost or at a loss to maintain a good relationship with our client, I am now very reluctant to proceed with a replacement without figuring out exactly what happened. Again, no surge protection event, no damaged power supply (except for one 24VAC to 12VDC converter).
All cameras are mounted on metal structures with connection to ground. I'm guessing the issue is some sort of strange electrical phenomenon which bypasses the surge protection in place. Perhaps it's from the ground, but note that the cameras are in 3 general locations sometimes more than 100 yards apart.
I hope that's enough background information. Video surveillance systems are a common installation request but are not necessarily our specialty. I'm hoping the wealth of experience here at IPVM can combine to help us resolve this issue once and for all.
Thank you all in advance.