Installation
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GA12119_002_A3 - 01/2012 - © Oerlikon Leybold Vacuum
3
Installation
3.1
Conforming Utilization
1.
The cold head generates in connection with a compressor unit “cryo-
genic” temperatures, i.e. temperatures below 120 K (K = Kelvin).
2.
The cold head has been designed for operation with a very high purity
helium (purity 99.999% or higher). Compressors and connected cold
heads have been designed to be operated in indoor rooms.
3.
The cold head must, when being operated, be firmly installed to the
insulating vacuum, respectively welded to it.
4.
The cold head must only be operated with the compressors, pressure
lines and electric connecting lines specified for it. Connecting other
components requires prior approval by Oerlikon Leybold Vacuum.
3.1.1 Non-conforming utilization
Non-conforming utilizations for the cold head are among others:
1.
Safety devices must not be disabled.
2.
Use of helium which is not pure (a purity of 99.999 % or higher is
required) or other gases.
3.
Operation at helium pressures higher than those specified.
4.
Use of the cold head in environments which demand a type of pro-
tection in excess of IP 54 and altitude above 1000 m.
5.
Operation without connected helium pressure lines and compressor.
6.
Removal, covering or obstructing warning information.
7.
Standstill or storing the cold head without having sealed it off suitably
and dried it. When stored in a humid atmosphere there is the risk of
corrosion.
8.
Cold head, cables and pressure lines must not be used to climb onto
the system.
9.
The use of compressors, cables, helium pressure lines and other
accessories not approved as original accessories from Oerlikon
Leybold Vacuum.
10.
Conversions, modifications and maintenance work by personnel not
authorised by Oerlikon Leybold Vacuum.
Any non-conforming utilisation of coldhead, cryo pumps and accessories
can result in severe injury and may cause damage to components.
CAUTION
