Condensation in my sensor

Discussion in 'STX and STXL' started by bandido, Aug 22, 2019.

  1. bandido

    bandido Standard User

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    Hello,

    I have a problem with my STX 16803 and need some advice.

    Since a few months ago, when I cool the ccd chamber, I have condensation around the Kaf sensor. It's not in his totality, around de half diagonal. After around 20 minutes, the condensation disapears and I can shoot all night without problem.

    I baked the desiccant plug two times but the problem remains.

    What can I do more ? Buy another one ? The ccd is around three years old and used for around 200 hours in normal humidity conditions (50-60%).

    Thank you and regards,

    Miguel
     
  2. Doug

    Doug Staff Member

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    What temperature are you running the sensor at?
     
  3. bandido

    bandido Standard User

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    -20°C, around a delta of 35°C
     
  4. Doug

    Doug Staff Member

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    Should be fine at that temperature.

    Did you follow the baking procedure in the manual? You do need to use a fairly high temperature, because the desiccant will not release the moisture otherwise. It needs to be 350F / 175C.

    What is your camera serial number?
     
  5. bandido

    bandido Standard User

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    I suppose I did it correctly but I could do it again.

    The serial is X15070033.

    Thanks.

    Miguel
     
  6. Doug

    Doug Staff Member

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    When you baked the desiccant, did you first remove the O-ring from the desiccant plug? And then replaced it when you reinstalled the plug?

    If not, the O-ring may be missing or damaged, in which case it won't seal properly.
     
  7. bandido

    bandido Standard User

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    Yes, I removed and replace it each time. It seems in good shape.
     
  8. Doug

    Doug Staff Member

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    You can either try it again, being careful to verify the correct baking temperature, or you can send it in to @Bill at SBIG Service & Repair.
     

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