0.4
Hazards caused by materials and substances
1.
When draining out helium do not direct the gas in the direction of
persons or components. Compressed gas at high concentrations can
have a suffocating effect. Do not breathe in helium at high con-
centrations!
2.
The cold head may suffer contamination from the process or due to
environmental influences. Contaminated parts can cause health
impairments and environmental damage.
Before beginning with the work inform yourself about any possible
contamination. When handling contaminated components, observe the
pertinent regulations and comply with the protective measures.
3.
When using the regeneration heaters from Oerlikon Leybold Vacuum,
note the safety precautions detailed in the enclosed Operating
Instructions.
0.5
Danger of ignition
1.
Risk of explosion!
The cold head in its standard version is not suited for operation in
explosion hazard areas. Please consult us if planning such a use.
0.6
Dangers in connection with safety-related measures and
precautions
1.
The insulating vacuum must be provided with a safety valve which
opens
- when a leak occurs between the high-pressure helium and the
insulating vacuum
- when frozen gases which collect because of leaks in the insulating
vacuum are released when shutting down and warming the cold head.
2.
The safety valve present at the cold head must not be blocked or
modified.
3.
The cold head is operated through the connected compressor. In the
event of a brief mains power failure the compressor will automatically
revert to its previous operating status.
0.7
Risk of damagie to the cold head
1.
Only very high purity helium (with a purity of 99.999% or higher) must
be used.
2.
Operate the cold heads with the permissible settings at the com-
pressor only. The cold heads described operate off three-phase mains
power. For this refer to the notes in the Operating Instructions for the
compressor.
3.
Operating the cold head motor without connected helium circuit will
cause a thermal overload of the cold head motor and damage to the
cold head.
4.
Do not confuse high-pressure and low-pressure connections.
Confusing these can cause damage in the cold head.
Safety information
6
GA12119_002_A3 - 01/2012 - © Oerlikon Leybold Vacuum
DANGER
CAUTION
CAUTION
NOTICE
