Know your rotors and maintain a log book

Rotors (high speed and ultra) of unknown history may not be used. A complete and comprehensive rotor log is to be kept for every high speed and ultracentrifuge rotor, and will include all user names, run dates, durations, speeds, total rotor revolutions, and any notes on rotor condition.Rotor manufacture date, and the date of stress testing (magnaflux or other professionally recognized analysis) if applicable, shall be recorded and kept with the rotor log.