38
ULVAC CRYOGENICS INCORPORATED
Problem
Possible Cause
Corrective Action
Cold head and oil adsorber
exceed the recommended
maintenance interval.
Conduct the maintenance according
to the operation time.
(5) The rate of Liquid Nitrogen
production is lowered.
Helium charge pressure of
C30PMVRT is lowered.
Add helium to the specified
pressure. Please contact us when
this trouble occurs frequently.
Amount of evaporation from
dewar increased.
Please contact us.
EMP absorbs special gas such as
helium.
Please contact us.
Ice or frost adheres to inside the
dewar or around the cold head.
Please contact us.
The purity of Nitrogen gas is not
sufficient.
Check the purity of nitrogen gas
supplied.
(6) Other failures
Please contact us.
Summary of Contents for UMP-40W
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