Problem ASI 294MC PRO

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Domenico1984
Posts: 2
Joined: Sun Apr 22, 2018 9:57 am

Problem ASI 294MC PRO

Post by Domenico1984 » Thu Mar 19, 2020 1:42 pm

Hi I have a problem on the 294mc pro sensor. In practice, when cooling is activated and the sensor drops below 0 ° C, these defects appear, which I attach to the photo. With the passage of 3/4 hours the defect disappears gradually reducing. This defect does not appear on the dark it does only on the light. It doesn't seem to be condensation. To the eye, nothing strange is seen. What can it depend on ??
Attachments
strano.jpeg

Support1@ZWO
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: Problem ASI 294MC PRO

Post by Support1@ZWO » Fri Mar 20, 2020 7:11 am

Could you share us the image fit file? And contact support@zwoptical.com, we will help you.

Domenico1984
Posts: 2
Joined: Sun Apr 22, 2018 9:57 am

Re: Problem ASI 294MC PRO

Post by Domenico1984 » Sat Mar 21, 2020 1:19 pm

I send mail

Support1@ZWO
Posts: 520
Joined: Fri Dec 07, 2018 10:24 am

Re: Problem ASI 294MC PRO

Post by Support1@ZWO » Mon Mar 23, 2020 6:27 am

Email received. Let us keep in touch via email.

dark energy
Posts: 18
Joined: Wed Feb 27, 2019 9:15 am

Re: Problem ASI 294MC PRO

Post by dark energy » Wed Apr 01, 2020 1:40 pm

Hi,

since last week I have a similar (or the same?) problem.
The ASI294 ist always mounted to the RASA 11", everything
is dry and unchanged for months.
I attach an (extremely stretched) screenshot.
In the center the problem is obvious, but some areas
on the left and the right are also affected.


Markus
Attachments
IMG_0464.jpg

dark energy
Posts: 18
Joined: Wed Feb 27, 2019 9:15 am

Re: Problem ASI 294MC PRO

Post by dark energy » Wed Apr 08, 2020 12:30 pm

After a few nights of testing I'm almost sure
that the problem is caused by humidity.
As I didn't remove the Camera from the telescope
I can‘t say if its on the inside or outside of
the front glass or on the sensor.

What can I do?


Markus

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Support2@ZWO
Posts: 668
Joined: Thu Feb 09, 2017 4:58 am

Re: Problem ASI 294MC PRO

Post by Support2@ZWO » Wed Apr 15, 2020 1:24 am

Dear All,
Sorry for the problem.
For the current, we still did not know what caused this problem. But there is a method could solve this problem now.
When the camera reach the target temperature after cooling, please wait for at least 20 minutes. According to our test, usually, this phenomenon will disappear after the waiting.
Thanks
Chad
ZWO Driver Engineer
Location:lon=120.6 lat=31.3
SuZhou China

dark energy
Posts: 18
Joined: Wed Feb 27, 2019 9:15 am

Re: Problem ASI 294MC PRO

Post by dark energy » Wed Apr 15, 2020 8:41 am

Hi,

I already tried this and for a while it worked.
Unfortunately the phenomenon ist getting worse over time.
Waiting over 3 hours didn't help. :-(
As soon as the sensor temperature is lower than about
15 degrees below the environment temperature the
problem occurs.

Markus

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