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GA10218_0101 - 5/2002
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1.3 Introduction
1.3.1 Purpose
The PhoeniXL is a leak detector for Helium or Hydrogen. This instrument
may be used to detect the location and the size of leaks on objects under
test in two different ways:
when the test sample has been evacuated first and is sprayed with
helium on the outside. It is required that a vacuum connection is provi-
ded between the PhoeniXL and the test sample (vacuum mode).
or
when a helium overpressure is provided in the test sample and the test
sample is searched from the outside with a sniffer probe which is atta-
ched to the inlet port (sniffer mode).
CautionThe PhoeniXL is to be used for leak detection only. It must not be
used as a pumping system (esp. pumping aggressive or humid
gases.)
Pumping condensable gases and steams: When pumping test sample
water vapour that is inside the test object can attain to the fore pump.
With the water vapor that is in the air - especially in humid areas or when
using humid or wet test samples - the acceptable compatibility of water
vapor or capacity of water vapor respectively can be exceeded.
The steam in the oil of the pump condeses when the water vapor rises
over the acceptable value. So the attribute of the oil changes and danger
of corrosion occures for the pump.
While using the leak detector with condensable gases and steams the oil
of the fore pump has to be controlled regularly. So you can recognize a
condensation of water vapor in the pump. Usually the oil is light and
lucent. When water vapor is inside it gets blear and milky at operating
state temperature.
When turning the pump off water vapor condensates and raises the part
of water in the oil.
CautionThe leak detector must not directly be switched off after the pro-
cess, in which condensable gases or steams are pumped, is
finished. It must be running (at least 20 minutes) with opend gas
ballast valve (see Chapter 5.3.1) until the oil of the pump is freed
from detached steam.
When not taking care of this instruction there can be a corrosion
within the pump, which will not be covered by our warranty.
The heighth of the oil of the pump has to be controlled regularly.
The normal intervalls of changing the oil from the producer have
to be taken care of. See instructions of the rotary vane pump.
If the PhoeniXL will be used in an application with toxic materials please
contact Leybold for appropriate decontamination rules. Should the unit will
be in contact with dangerous gases, the declaration of contamination has
to be filled in.
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