Cryomech LNP-40, Инструкция по установке, эксплуатации и текущему обслуживанию

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Safety
3-10
Section 8.6 Recharge helium
CAUTION
When adding helium, the helium must be 99.999% pure. Contamination by other
gases will result in the freezing of the contaminant gases in the cold head because
their freezing temperature is much higher than that of helium. Contaminants in the
helium charge will severely degrade the cold head's function and it will require factory
servicing.
Contamination of the helium by other gases is a common cause of premature failure
and, unless resulting from a system failure, is not covered by the warranty.
CAUTION
No more than 5 PSIG (.34 bar) of gas should be added per minute to prevent internal
oil contamination to the system. If such contamination occurs, factory service will be
required
Section 8.8 Filter element replacement
WARNING
Failure to replace the filter bowl in the locked position could result in catastrophic
failure and personal injury.
Section 8.9.1 Helium compressor and dewar
CAUTION
Never wet either part of the system. Water getting into the system will void the
warranty.
Section 8.9.2 Aeroquip
®
couplings
WARNING
Never remove an Aeroquip
®
coupling from the helium flex lines, cold head or
compressor without first relieving the helium charge. The pressure in any of the
components can blow off the coupling with sufficient force to cause injury.
Section 8.10.2 Electrical protection device (option)
WARNING
Do not attempt to replace the fuses or place anything inside the enclosure until the
power to the electrical protection device has been disconnected. Serious injury or
death may occur.