×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Condensation in industrial computer terminals

Condensation in industrial computer terminals

Condensation in industrial computer terminals

(OP)
We have a problem with condensation build up inside our computer terminal and we need either a plug, and/or valve to drain the water out or something to prevent the condensation in the first place. This terminal goes in and out of a flash freezer several times a day so the terminal goes from 90 deg's to 30 deg's below 0. Please advise.

RE: Condensation in industrial computer terminals

Hi mechwater!
I don't know, if you have to design the terminal yourself or you use some of-the-shelf, but you may wish to see what they did in Motorola. I dealt few years ago with their MW-520 mobile workstation. It has a very interesting design to take into account. First of all they seal the enclosure completely, so that the only humidity you have to deal with is inside of the device. Once it is sealed from the outer air, you don't have to care about it in most cases, because their is no air flow inside and it's naturally heated by your components. If it's still not enough, absorb it with silica gel :)
You have to be very careful with termal management under such conditions. Once no inner ventilation is present, you'll have to turn the whole enclosure into one big heat sink. It's a very special design and requires precise knowledge on all the details. Blow the air on your device from outside, once it's out of the freezer.
I hope this helps.

RE: Condensation in industrial computer terminals

I second that, use an absorbent such as silica.
A second opinion would be to dehumidify the terminal. Do this by dropping the temperature slowly, then perform your temp shock testt, assuming you can A. seal your unit and create a closed loop dehumidifcation cycle.

Eugene
evzene@hotmail.com

RE: Condensation in industrial computer terminals

Hello,

Another option is to purge the system using Nitrogen, assuming you have a sealed system with a port to do so, once this is done, pressure the system with Nitrogen to about 3 PSI.  We use this method with our electronics that are used in cold environments like the Artic, Icebergs...

You could also conformal coat you electronics with a spray, do a Web search, you will find information if you are interested.

Tofflemire

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close