15
Purging the Stage Method 2
This method uses an inert gas from a gas cylinder
to purge the stage at temperatures above ambient
when the LNP96 is not required.
1.
Make sure the Stage Lid is in place and the
Stage Door is closed.
2.
From a gas cylinder connect the Gas Insert
with a tubing 3mm inner diameter and 6mm
outer diameter to the Gas Purge Valve (1).
3.
Connect a Gas Insert to the opposite side Gas
Purge Valve (2).
4.
Use the gas regulator to set a gas flow rate of
1L/min.
5.
With the gas flowing through the Sample
Chamber, block the gas outlet for a few
seconds and releasing the gas outlet valve with
a finger. Repeat this for a few minutes to purge
the stage.
Reduce the gas flow rate to 20cc/min to
continuously purge the stage or remove the two
Gas Inserts to keep the chamber under closed
inert atmosphere.
Note: Helium gas is not recommended for
continuous purging. This gas has a very high
thermal conductivity and will cool the silver
heating block too much during an experiment and
may cause the temperature to fluctuate.
2
1
To gas cylinder
