•
All the liquid may not return in a single pass and repeating the evacuation
procedure may be required. However, some liquid may be present in the
system and care should be taken during evacuation that the trap does not
become blocked. The liquid may also be encouraged to leave the sample cell
by using a small amount of gas.
•
Close valve V3 and open valve V10 to allow helium gas into the lower part of
the system. Close valve V10 and carefully open valve V5 to allow the gas to
pass through the sample cell. DO NOT repeat this procedure until the pressure
in the system is known by opening valve V3.
•
Close valve V4 and repressurise the system and Vessel 3 by opening valve V9.
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