Fill and Install the Dewar

To surround the cold trap, the dewar must rest on a small stand. Hold the dewar beneath the cold trap, then raise it enough to slide the stand underneath the dewar. Lower the dewar until it rests on the stand. Ensure the cold trap is immersed.

If performing an analysis that requires use of the cold trap and cryogen, check the cryogen level in the dewar. It should be approximately 25 mm (1 in.) from the top.

  The cryogen must not be cold enough to trap the carrier gas or analysis gas. Do not use liquid nitrogen with argon carrier gas. For example, use an alcohol and liquid nitrogen slurry (-80 ºC).
 
   Micromeritics Learning Center    Contact Us

Copyright © 2018. Micromeritics Instrument Corporation. All rights reserved.