Operating Manual SIGMA 2-5, page 25 of 55
03/06
3.2 Installation
3.2.1 Site
All energy consumed by the centrifuge is converted into heat and emitted into the
ambient air. Therefore, sufficient ventilation is important. As the air-ducts in the
unit must be open, keep a clearance of at least 30 cm around the centrifuge.
Also, the centrifuge shouldn`t be positioned near radiators and should not be
directly exposed to sunshine.
The table should have a solid, even top.
For normal operation the ambient temperature should not fall below 10 °C and
not exceed 35 °C. The max. humidity of air is 80 %. During transport from cold to
warmer places water will condensate inside the centrifuge. It is important that
there is enough time for drying before the centrifuge can be started again.
3.2.2 Connection
The operating voltage on the name plate must correspond to the local supply
voltage!
SIGMA laboratory centrifuges are units of safety class I, DIN VDE 0700, and in-
clude a three wire power cord 2,5 m long with shockproof right angle plug.
At the back, next to the mains supply, there is an additional ground wire
connection where a separate ground wire can firmly be connected to ground any
non-hazardous leakage current. The leakage current is harmless but secondary
effects would occur.
3.2.3 Fuses / Emergency Circuit Breaker on Site
The centrifuges must be protected typically with 16 A time lag low fuses.
An emergency circuit breaker to cut the power to the centrifuge in the event of a
malfunction is required on site. This switch should be located away from the
centrifuge, preferably outside the room where the centrifuge is used or at the exit
of this room.
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