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 Post subject: ASI071mc Dewing
 Post Posted: Mon Jul 24, 2017 2:08 pm 
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Joined: Thu Jul 20, 2017 3:48 pm
Posts: 2
HI,
I have purchased a new ASI071MC only to discover that a temperature bellow 0C the chip is covered with dew. I have purchased a dew heater for this camera but the problem remain.
I also added the extra tube with absorbant but it made no difference either.
Any idea if there is a cure to that problem or if I need to return the camera to the dealer?
Many thanks for your help.
Vince


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Wed Jul 26, 2017 9:30 am 
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Joined: Thu Feb 21, 2013 2:51 am
Posts: 2117
Hi Vince
you can do like this:
put the desiccant tablets into microwave oven for heating about 2 mins
then add it to the tube , this may help

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Location:lon=120.6 lat=31.3
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 Post subject: Re: ASI071mc Dewing
 Post Posted: Thu Jul 27, 2017 8:03 am 
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Joined: Thu Jul 20, 2017 3:48 pm
Posts: 2
Thank you for the advise.
I will try that and see how it goes.
Vince


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Sat Aug 05, 2017 11:07 pm 
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Joined: Sat Aug 05, 2017 10:57 pm
Posts: 2
My new ASI 071 is also dewing @ -10C. I was in a strong humidity weather > 80%...
It's seems to be on the external side as i've no frost on the sensor mainly a dew behavior ...
Maybe the camera internal heater is undersized ?

As i saw this message before purchase, i also add the zwo 1600 dew heater to the combo.
But a major flaw is that the dew heater cover the tilt screw adjustment on the ASI 071 + It's ugly !

I ve conducted further experimentation with my brand new camera yesterday.
I was @home with a very low humidity and i drive the cam @ -10C in 20 minutes....
The TEC never run at more than 42%
=> What i see is not on the front windows, it's dew on the sensor :(
(And since it's on the sensor, the additionnal dew heater is useless.)

So i run the TEC for 0°C for about 15 minutes and the dew fade away.
I shoot some dark for 1 hour @ 0° running the TEC @ 15%

Then after that, i cool down again @ -10°C in 10 minutes. The dew this time does'nt came back.
But i've not run the Camera for a long time as i need some sleep...

As the camera is new, i would avoid to install the desicant tube for now.
This operation will break the camera sealing and expose the camera to ambiant air.
When the desicant tube is installed, i understand that it must rest in place ?

Any suggestion ?


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Sun Aug 06, 2017 2:49 pm 
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Joined: Sun Aug 06, 2017 2:29 pm
Posts: 5
Hi I also purchase an ASI071 in May and since the first time I used it I had ice so I activated the anti dew option in the ascom driver I have no longer ice but i still have strong dew problem on the sensor below -5°c. I tried to lengthen the cooling time but without good results so I decided to put the desiccant tube with 2 tablets but I have a question: do the desicant tube must rest in place after 24h or can we take it off and replace it by the original screw ?

Thanks for your help and sorry for my English I'm french.


Attachments:
File comment: An example of what I get at -15°c
capteur  -15.JPG
capteur -15.JPG [ 198.43 KiB | Viewed 304 times ]
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 Post subject: Re: ASI071mc Dewing
 Post Posted: Mon Aug 07, 2017 2:34 am 
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Joined: Thu Feb 21, 2013 2:51 am
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we found the air socket screw in our first batch of 071 is too long
so please check it at first
the long one touch the heat board and cause the camera is not sealed
Attachment:
pic1(1).jpg
pic1(1).jpg [ 30.06 KiB | Viewed 296 times ]

we can send some short screws to our dealer and our dealer can send it to you to replace the old one

About desiccant tube:
it is not as effective as put the desiccant tablets in the camera body
but it still works, so you can use the short screws after 48 hours
you need to put these desiccant tablets into microwave oven for 2 mins at first

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Location:lon=120.6 lat=31.3
SuZhou China


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Mon Aug 07, 2017 5:34 am 
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Joined: Sat Dec 31, 2016 12:30 am
Posts: 31
Sam wrote:
we found the air socket screw in our first batch of 071 is too long
so please check it at first
the long one touch the heat board and cause the camera is not sealed
Attachment:
pic1(1).jpg

we can send some short screws to our dealer and our dealer can send it to you to replace the old one

About desiccant tube:
it is not as effective as put the desiccant tablets in the camera body
but it still works, so you can use the short screws after 48 hours
you need to put these desiccant tablets into microwave oven for 2 mins at first


Hi Sam - I think i have an early version with the long screws.

is it possible I can get some short screws directly from you? I'm happy to pay for shipping

bvalente at gmail dot com


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Mon Aug 07, 2017 9:03 am 
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Joined: Thu Feb 21, 2013 2:51 am
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bvalente wrote:
Sam wrote:
we found the air socket screw in our first batch of 071 is too long
so please check it at first
the long one touch the heat board and cause the camera is not sealed
Attachment:
pic1(1).jpg

we can send some short screws to our dealer and our dealer can send it to you to replace the old one

About desiccant tube:
it is not as effective as put the desiccant tablets in the camera body
but it still works, so you can use the short screws after 48 hours
you need to put these desiccant tablets into microwave oven for 2 mins at first


Hi Sam - I think i have an early version with the long screws.

is it possible I can get some short screws directly from you? I'm happy to pay for shipping

bvalente at gmail dot com


this is our fault, we can send it to your free of charge
please email me and I will forward to my colleague sam.wen(at)zwoptical.com
sorry for the trouble

now you can use the desiccant tube at first

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Location:lon=120.6 lat=31.3
SuZhou China


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Mon Aug 07, 2017 9:45 pm 
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Joined: Sun Aug 06, 2017 2:29 pm
Posts: 5
You are saying that desiccant tablets works better inside the camera, Can we open it ( and how) to put the tablets inside and is there space to put them and how many can we put inside ?
Thanks


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 Post subject: Re: ASI071mc Dewing
 Post Posted: Mon Aug 07, 2017 9:52 pm 
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Joined: Sat Dec 31, 2016 12:30 am
Posts: 31
Jeanluc wrote:
You are saying that desiccant tablets works better inside the camera, Can we open it ( and how) to put the tablets inside and is there space to put them and how many can we put inside ?
Thanks


I think Sam was saying the opposite - that putting them in the camera isn't as effective. but i could be mistaken here

B


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