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 Post subject: IR filter cut problem
PostPosted: Tue Jul 29, 2008 10:21 am 
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Giday guys i,m new to the site
Illya is my name
I have a problem with 2 cctv cameras that i have they are IR day night cameras the problem i,m having is at night on my property its almost pitch black, just star light most nights, the problem seems to be possibly something to do with the IR cut filter switching in and out, the IR light level from the camera seems to be very dull but after a min or two it switches and goes bright the difference being like having dark sun glasses on while driving at night and then taking them off and turning on a flood light, it seems to be dull for 1 or 2 min then goes bright for maybe 20 to 30 second then switches back again?
Any ideas what the problem could be?
Its not the power supply
There are no bright lights around
Its got me stumped?


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 Post subject: Re: IR filter cut problem
PostPosted: Fri Aug 01, 2008 9:58 am 
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vk3mnm wrote:
Giday guys i,m new to the site
Raju is my name
I have a problem with 2 cctv cameras that i have they are IR day night cameras the problem i,m having is at night on my property its almost pitch black, just star light most nights, the problem seems to be possibly something to do with the IR cut filter switching in and out, the IR light level from the camera seems to be very dull but after a min or two it switches and goes bright the difference being like having dark sun glasses on while driving at night and then taking them off and turning on a flood light, it seems to be dull for 1 or 2 min then goes bright for maybe 20 to 30 second then switches back again?
Any ideas what the problem could be?
Its not the power supply
There are no bright lights around
Its got me stumped?


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 Post subject:
PostPosted: Fri Aug 01, 2008 8:10 pm 
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It seems like the CDs sensor on the camera is bad.
Were they like that out of the box?


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 Post subject:
PostPosted: Mon Aug 04, 2008 6:22 am 
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doyo wrote:
It seems like the CDs sensor on the camera is bad.
Were they like that out of the box?


Yea i had sent the first two back and they sent me two new ones and they are still doing the same thing, i guess buying from Taiwan is just a bad move.


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 Post subject:
PostPosted: Mon Aug 04, 2008 10:56 am 
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Yeah, I've had some bad ones myself. I know not all Taiwanese products are bad, though.
By the way, if previous ones had the same problem, it might have something to do with the environment, too. Have you bench-tested them?


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 Post subject: what tech..
PostPosted: Tue Aug 05, 2008 9:47 am 
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What technology for switching CDS or video based? I have seen something like this with cheap CDS based mechanical filters. Like you said, the filter switches off at night, then the reflection of the IR light hits the sensor and switches the filter back on. It will continue to do this all night... you mentioned Taiwan, I bet that those cameras are Chinese Mate!


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 Post subject:
PostPosted: Tue Aug 05, 2008 10:38 am 
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What type of power 12vdc and 24vac? How long are the runs? What is the amp draw for the camera's and what is the amps at the power supply?

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Pegasus CCTV Tech support Rick www.pegasuscctv.com


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 Post subject:
PostPosted: Mon Aug 11, 2008 4:28 am 
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RickA wrote:
What type of power 12vdc and 24vac? How long are the runs? What is the amp draw for the camera's and what is the amps at the power supply?

Problem sorted guys it was because i was running a 20 meter lead and the voltage or current loss was way too much for the camera to run on, 12 volt and the lead was from radio parts so maybe i should look at getting better quality cable, i feel like a goose as this has been busting my chops for a long time now, i didn't even think about current loss over the 20 meter run :shock: :roll:
For now i have an extension lead and a 2 amp 12 volt plug pack direct to the camera.


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 Post subject: Re: IR filter cut problem
PostPosted: Mon Aug 11, 2008 4:30 am 
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raju_uniqueservices wrote:
vk3mnm wrote:
Giday guys i,m new to the site
Raju is my name
I have a problem with 2 cctv cameras that i have they are IR day night cameras the problem i,m having is at night on my property its almost pitch black, just star light most nights, the problem seems to be possibly something to do with the IR cut filter switching in and out, the IR light level from the camera seems to be very dull but after a min or two it switches and goes bright the difference being like having dark sun glasses on while driving at night and then taking them off and turning on a flood light, it seems to be dull for 1 or 2 min then goes bright for maybe 20 to 30 second then switches back again?
Any ideas what the problem could be?
Its not the power supply
There are no bright lights around
Its got me stumped?
????


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 Post subject: Re: what tech..
PostPosted: Mon Aug 11, 2008 4:34 am 
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telespy wrote:
What technology for switching CDS or video based? I have seen something like this with cheap CDS based mechanical filters. Like you said, the filter switches off at night, then the reflection of the IR light hits the sensor and switches the filter back on. It will continue to do this all night... you mentioned Taiwan, I bet that those cameras are Chinese Mate!

Mate the problem is sorted now and i have to admit i feel rather stupid for not finding the problem sooner, the cameras are fantastic now that they are working properly and the power of the IRs at night is unbelievable.
Thanks for the input guys!
Us newbies would be lost without yuz :wink:


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 Post subject:
PostPosted: Mon Aug 11, 2008 8:36 am 
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Just curious, what cameras were they??


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PostPosted: Tue Aug 19, 2008 10:49 pm 
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Ive recently had some EX82'a do this, it was bad photocells.
Other than the photocell, light in the area can cause it to switch back and forth, or reflection of its own IR onto a close reflective surface can cause it to switch as well.


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