Drain the Low Pressure System

  1. Specify a pressure of 10 psia. After the system reaches 10 psia and returns to Idle status, open the reservoir evacuation valve (#7) for 20 seconds.

The Hg reservoir evacuated indicator should be displayed on the analyzer schematic. If it is not shown, do not proceed to the next step. Instead, verify that the mercury reservoir fill cap is properly sealed on top of the mercury filling funnel (see Maintain Mercury Level). If the Hg reservoir evacuated indicator still is not displayed, contact a Micromeritics Service Representative.

  1. Open the mercury drain valve until the mercury drains.
  2. Close the mercury drain valve.
  3. Close the mercury reservoir evacuation valve.
  4. To return the system to atmosphere, go to Unit [n] > Generate Low Pressure and enter a pressure of 15 psia.
  If the system still indicates that the mercury is not drained (the status display, the mercury drained indicator or both), see Handling Mercury Overfill.
 
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