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O
PERATION
8
Storing Samples in Vapor
Phase
1.
Remove the 2 bottom-most cryoboxes from
each rack.
2.
Measure the height of 2 cryoboxes stacked on
top of each other.
3.
Fill vessel with liquid nitrogen to the height
obtained from step 2 using a yardstick to meas-
ure liquid level in vessel.
4.
Place racks into vessel without the 2 bottom-
most cryoboxes.
— Samples are now above the liquid nitrogen and are
stored in the vapor phase.—
Important—A level monitor should always be used when
you store your samples in the vapor phase because of
the already low levels of liquid nitrogen. Please refer to
page 12 for the correct level monitor for your system.
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