Planer Kryo360-1.7, Руководство оператора

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5 Introduction
also be visible from outside the room.
If liquid nitrogen is used in an area that requires forced ventilation, an alarm to indicate its failure
should be fitted.
When dispensing or potentially being exposed to liquid nitrogen, protect the face with a shield and
wear gloves, boots and a protective apron. Prevent spillage into shoes and onto unprotected parts
of the body.
Handle vessels containing liquid nitrogen carefully. Liquid nitrogen boils at -196ºC and both liquid
and gas can cause rapid and severe frostbite. Delicate tissue, e.g. the eyes, can be damaged by
an exposure to the cold gas, which may be too brief to affect the skin of the hands or face.
Stand clear of boiling and splashing liquid nitrogen and its gas when filling a dewar at normal room
temperature or when inserting objects (such as a pump) into the liquid.
Use tongs or wear cryogloves when handling cold or hot objects. Cryogloves are available as an
accessory from Planer plc. When running a program, the chamber and contents may get cold
enough to cause frostbite.
The dewar must be depressurised before the pump can be removed. This is achieved by opening
the pressure-relief valve mounted on the side of the pump, which seals an orifice in the pressure
system by toggle action. Avoid contact with cold nitrogen gas when depressurising the dewar.
The dewars used with this equipment must never be used to store any liquid other than liquid
nitrogen.
Only use vessels designed for working with liquid nitrogen.
Secure the liquid nitrogen container to prevent toppling.
Ensure that the delivery pipe connections are secure and leak-free before supplying liquid nitrogen
to the freezer.
Liquid nitrogen pressure must not exceed 1.7 bar (25 psi).
To maintain protection against electric shock, the mains lead must be properly fitted to a 3-way
mains connector plugged into an earthed mains outlet.
Because of the potentially wet laboratory environment, the operator should be provided with
additional protection against electric shock by supplying mains power to the freezer through a
residual current circuit breaker (RCCB) operating at a differential of 30 mA. Note that care must
be taken to ensure that the freezer is not compromised by faulty equipment sharing the same
supply and causing nuisance trips.
The mains outlets on the chamber’s rear panel are only for use with the Planer LNP4 unit.
The alarm output on the controller must only be connected to equipment that complies with the
requirements in the
Alarm output section.
The 15-way socket on the Controller is only to be used for connecting to a Planer chamber.
The RJ45 Ethernet socket is designed for connection to information technology equipment
compliant with IEC 950 or its equivalent. Use with other equipment may compromise the safety of
the device. The unit should only be connected to an Ethernet local area network (LAN) internal to
the building.
The Type-B USB connector on the Controller is only to be used for connecting to the USB port of
a computer that complies with IEC 950 or its equivalent.
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