12 General Information
iina74e 01.fm technical handbook(1408)
1.3 Introduction
1.3.1 Purpose
The UL5000 is a helium leak detector. 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 provided between the UL5000
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 attached to the inlet port
(sniffer mode).
If you plan to detect noxious matters please contact the manufacturer. Rules for
decontamination will be developed then. If the leak detector already has been in
contact with dangerous gases please fill the declaration of contamination and sent it
back with the leak detector to INFICON.
When there are parts that have to be cleaned, please fill the declaration of deconta-
mination, too, and send it to INFICON before you send the parts.
Caution: Danger of explosion:
Hydrogen forms a highly explosive gas mixture with air.
Great caution is necessary when using hydrogen! No smoking, no naked flames,
avoid sparks.
Dangerous gases pollute the machine.
So you must not use the machine for detecting toxical, acidly, microbiological,
explosive, radioactive or other noxious matters.
The UL5000 is to be used for leak detection only. It must not be used as a pumping
system (esp. pumping aggressive or humid gases.)
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