Near Centrifuge disaster

All,

The JN-26 on the 3rd floor had a near catastrophy this morning when a run was begun and quickly aborted due to unbalanced loads. Upon inspection, it was found that there was a mismatched swinging bucket left in the rotor with the three other correct buckets. Further investigation revealed six aborted runs previous without the log book being filled out prior to use. 

This mistake cost a weeks worth of research investment and potentially could have destroyed a $30,000 piece of equipment. It is imperative that log books be filled out prior to use and unexpected equipment failure be reported to your PI or to me or both. 

This equipment is vital to everyones research in the building, we cannot afford to lose any of these units due to careless mistakes. 

Thank you!