Beckman Coulter SA 3100, Manual

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7-32
PN 4237215AA (October 2011)
WARNING
Use proper safety equipment when handling liquid nitrogen, including, but not
limited to, safety glasses and low temperature thermal gloves.
WARNING
Always temper new dewars by adding a small quantity of liquid nitrogen and swirling
the liquid in the dewar before filling. This reduces the risk of implosion and injury.
IMPORTANT
Do not load the dewar onto the dewar rack until instructed to do so by a message on
the touch screen. Doing so will condense nitrogen on the sample, causing low
surface area results.
Figure 7.20 Adding Liquid Nitrogen to Dewar