Safety Devices - Thermo Scientific Sorvall WX100 Plus Instruction Manual

Safety Devices

Protection of rotor chamber
Should the rotor spinning at high speed fail (or leave the drive shaft), the safety of the operator is ensured by the thick protective steel
ring which encloses the bowl (Figure 3: Rotor chamber)�
Imbalance detector
If, during operation, the vibration of the rotor becomes excessive due to serious imbalance or improper installation of buckets, the
imbalance detector detects the situation and decelerates the rotor immediately�
However, the ultracentrifuge is designed to tolerate imbalances associated with balancing by eye - it is equipped with an imbalance-
tolerant drive (For more information on the balancing of rotors, see section Rotor and Tube Preparations and Precautions)�
Door lock system
The chamber door automatically locks for safety while the rotor is turning� When the power supply is off, the door remains locked�
The door can only be opened and closed when the rotor is at rest and the rotor chamber is vented� Unless the door is closed, the
rotor will not begin rotating except in zonal mode�
To open the door in the event of a power failure, see section Occurrences in the Event of Power Failure�
Speed sensor and overspeed detector
For protection in the event of entry errors the ultracentrifuge is provided with an automatic system to stop the rotor when its speed
exceeds the maximum allowable speed� If a speed higher than the maximum permitted speed is set, the ultracentrifuge will detect the
mistake before the speed reaches 3000 rpm, and then will display an alert message and decelerate the rotor to a stop�
20