HikMicro Mini 2 Plus - Anyone with the same Problem?

[TurboTom]

Recently, I got the mentioned LWIR "Adapter" at a bargain which works quite well otherwise -- I especially like the adjustable focus and the high frame rate -- but shows a peculiar "defect" after self-calibration:

Upon "Cold Start" with the lens cover on, the image is uniform with only neglible variations in temperature over the image. After a few self calibration periods (audible clicks of the shutter), a gradient develops that finally spans approx. 2K in a diagonal direction. It clearly appears as if some component inside the camera heats up and either reflects in the shutter or heats up the shutter lid unevenly. This gradient also clearly shows in thermal images with low thermal contrast. High-contrast images are quite good, obviously.

I'ld like to know if this problem can be observed with other specimen of this device, hence if it would make sense to return my Mini 2 Plus for a replacement.

Thanks for your thoughts and input!

Cheers,
Thomas

Attachments: Thermograms directly after cold start, after approx. five calibration periods (both with lens cover on), and two high contrast shots of a tiny tube amp project I'm currently working on 

Edit: Had to re-upload the thermograms since for whatever reason, they got displayed upside-down 

[Francesco Ang]

Hello, I bought a secon-hand one some months ago. It is a V2 version (manual focus). Same problem. I contacted them through the chat, and then emails. I presented the problem, which is even worse than yours (I get 4 K between the diagonal ends). They were quite kind, but actually they didn't provide me with a clear answer. I would like to go on and force them to replace it, since it is clearly out of declared specification. What did you do in the end?
Francesco