Filling Instructions; Section 4 Operation - Thermo Scientific Arctic Express CK50920 Manual De Funcionamiento Y Lista De Piezas

Filling Instructions

Thermo Scientific
Operation
Section 4
Caution Never overfill liquid nitrogen vessels.
When inserting or removing cans be careful not to come in contact with
the neck tube area of the vessel. Remove or insert cans slowly in a vertical
manner. Scratches on the neck tube area can cause premature vacuum
failure.
Do not spill liquid nitrogen on vacuum port - this can cause vacuum
s
failure.
To avoid damage to your cryogenic storage vessel which may result in
premature vacuum loss, it is important that the following procedure be
used during the addition of liquid nitrogen to a warm vessel:
1. Add only a small amount of liquid nitrogen (2-10 liters) to new or
warm vessels.
2. Allow this small amount of liquid nitrogen to sit in the covered vessel
for a minimum of 2 hours. This will limit stress caused by the sudden
temperature change associated with adding liquid nitrogen to a warm
vessel.
3. Add additional LN2 to vessel.
4. Allow vessel to sit for 48 hours and monitor liquid nitrogen
consumption.
5. Fill vessel as desired. Remember to allow for displacement of liquid
nitrogen when canisters and canes are inserted (when using vessel as a
laboratory "wet" vessel.)
6. Insert and remove canisters slowly. Allow liquid nitrogen to run out of
canisters.
Cryogenic Dual Shippers 4-1