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Operating Manual Xenotest
®
440
Inhalt/Content/Sommaire
3
Requirements for the installation site
3.1
Room climate
Climatic requirements for the installation room:
In continuous operation the Xenotest
®
440 can cause a
constant change in the room climate due to the emission
of warm air. Therefore, the instrument should only be
installed in an adequately cooled, dust-free room.
• Room temperatures of 18 °C to 25 °C
• Relative humidity of 50% (± 10%)
3.2
Room ventilation
The installation room must be equipped with a ventila
-
tion system that can accommodate a fresh air volume
flow of at least 300 m³/h.
• The fresh air must be filtered through an air filter of
filter class EU 4
• The installation room must be kept dust-free
3.3
Instrument exhaust air system
The lamp cooling of the Xenotest 440 must be connected
to an exhaust system. The exhaust system may be pro-
vided by a contractor or direct extraction to the outdoors
whereby the following basic conditions must be satisfied:
• The exhaust air channel must be made of flexible,
heat-resistant material because the temperature of
the exhaust air can rise up to 120 °C
• The exhaust air channel may be a maximum of 3 m
long
• The diameter of the exhaust air channel must be
at least 100 mm. The connection nozzle on the Xe
-
notest 440 has a diameter of 100 mm
• The exhaust air channel may have a maximum of two
90° bends
• If greater lengths than 3 m or more than two 90°
bends are necessary for laying the exhaust air chan-
nel, a blower must be installed by the customer
• The exhaust air system must work in such a way that
no air can be blown back into the instrument by back
pressure (see also Atlas price list)
The exhaust air of the test chamber can be fed into the
installation room and recirculated by the room ventila-
tion.
NOTE – protective system failure
The instrument exhaust air system can overheat if the
maximum length of the exhaust air channel and the
maximum permissible number of two 90° bends is not
observed. This results in the protective mechanisms of
the Xenotest 440 interrupting the power supply to the
instrument.
