CNB VCM-24VFH issues

[Palomino 0]

Hello all,

 

I am having some issues with 2 of my 4 VCM-24VFH (with heaters) fogging up in the mornings. This morning it got down to about -10F and one of the cameras even iced up on the inside of the dome. I have checked the heaters and they are working. They also unfog by about 12 noon. I also put fresh gel packs in the cameras before winter started. I have also put a little oil on the rubber gaskets of the cameras to ensure a good seal. Does anyone have any ideas how I can remedy the fogging up issues.

 

Thanks,

 

Mike

[tomcctv 190]

Hi. how do you have the camera wired up. are you using conduit ? a lot of people forget heat will follow the cable outlet. so your dome never builds up the heat it needs.

 

if you are on conduit undo it just as it enters the camera and fill the inside with silicon. this will stop the heat leaving the dome and escaping down the conduit.

 

it is also good to cover the base in silicon as this also covers all fixing points (pre drilled holes) you just need to look at anywhere heat can escape from your camera

[Fiona 0]

Always difficult to say anything useful after Tom, but here goes...

 

I had issues with one particular PTZ dome camera that fogged terribly after each teardown. I would open it up and reassemble it in an air-conditioned room and that caused it to fog badly for days afterwards. It only occured to one very problematic PTZ dome. I figured out that I had to repair it in a de-humidified room which dramatically reduced, but did not eliminate, the problem. And once the fogging problem started, it would always reappear in very cold weather. First thing in the morning, there would be a blanket of condensation inside the dome. Hours would pass before it cleared.

 

In order for ice to form, there must be a considerable amount of moisture in the dome. And, as any dome heats up and cools down in the course of the day, the potential for cool, moisture-laden air to enter arises. The heat of the dome ought to work in favour of keeping the interior of the dome dry. Is it possible that some other cause is allowing for water ingress?

 

Also, the quality of perspex or plexiglass domes varies widely. The exterior surface of cheap domes always need cleaning; watermarks and dust are a constant problem. Higher quality domes require far less frequent cleaning. I wonder if this issue of quality affects a resistance against fogging too?

[ssmith10pn 0]

You didn't mention how it was mounted and how the wires penetrate the housing.