LD Series
Extended Time Series
Liquid Nitrogen Dewars
Safety
Before using any cryogenic refrigerator, read the Handle
with Care booklet provided with the unit. It details safety
precautions that must be understood before using the
equipment. If a replacement booklet is needed, order
publication Handle with Care from your supplier. Following
are a few of the safety precautions described in the Handle
with Care booklet. Please be sure to read the entire booklet.
Store and use these containers only in well
ventilated areas. In a confined area, nitrogen gas from
these units may cause suffocation by displacing air needed
for breathing. Install a suitable oxygen monitor.
Do not touch liquid or cold metal surfaces with
your bare skin. The liquid nitrogen refrigerant in these
containers is extremely cold: -196°C (-320°F). Exposure of
skin or eyes to liquid, cold gas or frosted parts could result in a severe frostbite-like injury. Because of the extremely low
temperature, a face shield and gloves must be worn when transferring liquid nitrogen and material into or out of these
containers.
Use only the necktube core supplied with this unit or a listed replacement part. A tight fitting plug or
stopper will cause a pressure increase in the container that may damage the container and/or cause personal injury.
Dispose of liquid nitrogen only in areas specifically designed for that purpose. Disposal of liquid
nitrogen should be done outdoors in a safe place. Pour the liquid slowly on gravel or bare earth
where it can evaporate without causing damage.
Operation
Filling: Adding liquid nitrogen to a warm container may cause splashing and will generate a significant volume of
nitrogen gas as cold liquid contacts warm Dewar surfaces. Add liquid slowly to minimize these effects. Be sure there is
adequate ventilation. Keep your head clear of the heavy volume of vapor that may be produced. It is extremely cold
and could cause personal injury.
WARNING
DO NOT OVERFILL. Over-filling may result in personal injury due to liquid spillage.
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