Dahua thermal image showing grey screen with flashing blue and red circles

[s300bee]

Hi
I have a new to me Dahua Thermal Hybrid Speed Done Camera TPC-SD2221. The thermal camera is displaying a blank grey screen with flashing blue and red circles moving around the screen. I really don't know anything about these cameras, any ideas?! Thanks

 

[Mark_M]

Hello @s300bee ,

Can you share a video or a screenshot with the issue?

From your vague description, it may be the thermal camera covered over and you're just seeing the red/blue circles to indicate the hottest and coolest parts of the image.
But hard to know without a photo.

 

[s300bee]

Many thanks for your reply! Here is a pic of whats going on...they jump around the screen!

 

[Mark_M]

Many thanks for your reply! Here is a pic of whats going on...they jump around the screen!

Those red & blue markers are the hottest and coldest part of the image by the thermal camera.

This camera's thermal imaging has a very narrow field of view. It's designed for a distance of at least 10m/33ft. Try pointing it outside and see if more detail can be captured by the thermal camera.
Right now it's capturing a surface that's an even temperature.

 

[s300bee]

Thanks so much for a prompt reply, shame it took me since august to reply to you Ill now try that!

 

[s300bee]

Ok so that made no difference. Is the a shutter on the lens as there is a bit of clicking going on? I really know nothing about cameras!

 

[s300bee]

I got brave....so it apprears shutter is not stuck shut? Not that i actually new it had one!

 

[s300bee]

So thermal camera shutter is working correctly so I guess a fault with the thermal camera itself?

 

[Photon Farmer]

Try pointing it outside and see if more detail can be captured by the thermal camera.

I have yet to use a thermal camera.
I would guess, pointing a thermal camera at a window would read temperature of widow glass on camera side

 

[Mark_M]

Ok so that made no difference. Is the a shutter on the lens as there is a bit of clicking going on? I really know nothing about cameras!

The shutter is needed for thermal cameras. It is used to constantly calibrate the temperature accuracy. By default the setting it set to 3 minutes (FFC).

I got brave....so it apprears shutter is not stuck shut? Not that i actually new it had one!

The shutter closes when the camera loses power.

Don't get dust in there and don't damage the lens alignment.
You may have turned this into a paper weight.