Sigma 3-16K - Page 33

Operating Manual SIGMA 3-16K, page 33 of 69
03/06
2.6 Safety Devices
Apart from the passive safety devices due to the instrument's mechanical design
there are the following active precautions for your safety:
2.6.1 Lid Lock, Cover Closing Device
The centrifuge can only be started when the lid is correctly closed and the lock
has latched. The lid can only be opened when the rotor has stopped. If the lid is
opened via the emergency release during operation (which is not allowed), the
centrifuge will immediately switch off and decelerate brakeless. If the lid is open,
the drive is completely separated from the mains supply, that means starting of
the centrifuge is impossible (refer to point 7.2.4 "Emergency lid release").
2.6.2 Standstill Monitoring
Opening of the centrifuge lid may only be possible, if the rotor is at standstill. This
standstill is checked by the microprocessor.
2.6.3 System Check
An internal system check monitors data transmission and the sensor signals with
regard to plausibility. In case of a malfunction an error message is displayed
under a number in the “Speed“ and “rcf“ display.
2.6.4 Ground Wire Check
For ground wire check there is a ground screw at the rear panel of the centrifuge.
A ground wire check can be carried out using an appropriate measuring
instrument.
2.6.5 Imbalance Monitoring System
The display “Imbalance“ indicates by lightning up that the centrifuge is in the still
permitted imbalance area.
In the event that bigger uneven loading leads to imbalance, the drive is switched
off during acceleration or during run.
“Imbalance“ is flashing and “ERROR“ is displayed. The centrifuge has to be
opened with the lid key. In both cases the loading has to be checked and
balanced.