Sigma 2-5, Руководство по эксплуатации, Страница: 23 / 55

Operating Manual SIGMA 2-5, page 23 of 55
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. The cover
locks must close. The lid can only be opened when the rotor has stopped. If the
lid is opened by the emergency release during operation, 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 time area.
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“ and the sequence of bars are flashing. The lid opens automatically
after the rotor has come to a standstill. In both cases the loading has to be
checked and balanced.