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Thermo Fisher Scientific
User Guide STP420D/STP420ES
Setting up the StP420
Selecting a Site for the STP420
Note!
To avoid harm to the instrument or users, make sure the site you choose for
the STP420 conforms to the following requirements.
• The main switch on the left side of the instrument must always be
accessible.
• The STP420 uses flammable liquids, so the site must be free from
sparks or open flame.
• The site must be a stable, flat floor space large enough to
accommodate the instrument’s dimensions and weight.
• If possible, you must be able to see the wash bottle scale oval
window on the right-hand side, so it can be checked weekly without
moving the instrument.
• Make sure there are no vibrations, direct exposure to sunlight, or
large temperature variations. Refer also to the Operating Conditions
in “Appendix E Technical Data”.
• Because the instrument has an exhaust system with internal
fume control, the site does not need a fan or exhaust vent for safe
operation. However, you can connect a 50 mm diameter hose for
external fume extraction, if required.
The socket on the rear has an outer diameter of about 51.5 mm. The
hose NW 50 (e.g. HT connection hose DN-50) needs to be attached to
the socket. It can be connected to the downstream suction connection
of a fume hood or an exhaust system.
D
esCription
of
the
air
DuCt
The air is sucked via a customized suction connection of an aspirator
hose. It flows through the perforated back wall of the upstream suction
nozzle and between the glass panels of the installation site.
The stronger the vacuum extraction, the more air flows between
the glass panels of the unit, and through the reagent tubes and the
aggregation part for suction.
technical Data
Recommended flow rate
about 7 m
3
/h (up to 20 m
3
/h)
Air velocity in the hose NW50
about 1 m/h (up to 3 m/h)
Flow noise
negligible, <20 dB (A)
Monitoring of air flow
on site if desired
Flow resistance of about 2 to 5 Pa/me depending
on the quality hose
about 2 to 5 Pa/m depending on the
quality hose
2-2 Selecting a
Site for the StP420