Is there a phenomenea that can force condensation at temps above dew point?

Subject: Is there a phenomenea that can force condensation at temps above dew point?

Date: Fri Apr 21 11:43:00 2000
Posted by No name entered.
Grade level: undergrad School: No school entered.
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Area of science: Physics
ID: 956335380.Ph

Message:


I own a commercial chest type refrigerator with a glass door on top.  
Occasionally condensation forms on the glass.  I borrowed a hand held dew 
point meter and found: Room Temp=89.5F; Dew Point=76.8F.  The glass surface 
measures 80.8F and has condensation?!?!?  This is not detrimental, but how 
can this happen?  The tools for measuring temp/humidity/dew point are 
calibrated units.  Is there a phenomenea that can cause this?
NOTE: The door frame is non-pourous (steel) and there is minimal air 
movement over the door.  Condensation only occurs on the left center of the 
glass (right side glass surface temp is much higher, around 84F).  The 
glass is approx 14" x 37" in size.

Re: Is there a phenomenea that can force condensation at temps above dew point?

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