Operating Manual SIGMA 3-16K, page 35 of 69
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. The
instrument has thermal fuses. In case of a disconnection through the thermal
fuses, allow a cool-down phase of two minutes, after which they could be
reactivated by a switch.
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
Each centrifuge must be protected with a 16 A time lag fuse.
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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