NOTICE
Damage to the analyzer caused by external voltages and magnetic fields
Never expose the analyzer electrode system to external voltages that are hazardous in the event of
contact, as a result of galvanic connections, contact, flashover, plasma, ion or electron beams, etc. If
such danger sources exist in the vacuum chamber, you must provide protective measures that safely
rule out such influences. Even smaller external voltages acting on the analyzer will lead to damage to
the electronics and unreliable measuring results.
► Meet appropriate protective measures against external voltages (for example, better arrange-
ment, shielding, earthing, etc.).
► Do not mount the analyzer near to magnetic fields with > 0.2 mT.
► Ensure mechanical protection against contact of the analyzer and the parts installed.
► Ensure compulsory separation of the current supply when opening the system (using a door con-
tact, for example).
► Observe the standards applicable for the vacuum system.
NOTICE
Impairment of the function caused by incorrect installation
You must install the QMA analyzer correctly in terms of vacuum technology, so that the gases to be
tested have unobstructed access to the analyzer. This is the only way to correctly determine the gas
composition in the vacuum chamber. When materials vaporize or vacuum coatings have deposited in
the vacuum chamber, you must protect the analyzer against separation of these materials onto its
surfaces, using a deflector plate or baffle.
► Always carry out a correct installation.
► Make sure that the gas exchange between the analyzer and the vacuum chamber is not im-
paired.
► Install a cover plate or a baffle in order to avoid vacuum coating of the analyzer.
► Include the analyzer in the baking out area if you are heating the system.
– You can also fit the analyzer with a separate heating.
Horizontal analyzer positioning
The analyzer is suitable for installation on the vacuum system in any position. Pfeiffer Vac-
uum recommends a horizontal mounting position. This has the following advantages:
● Optimum protection for the electronic unit against falling items
● Easier installation
● Easy access to the front panel of the electronic unit
Required tools
● 2 open-end wrenches,
WAF 10
Required material
● 1 copper gasket (490DFL040-S-G-S5)
● Yellow-green or bare copper wires, 2.5 mm
2
or 4.0 mm
2
cross section surface
Installation
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