Discussion Category:  Centrifuge

Temperature Cycling Between 4 and 30 degrees

The ultra recently has its vacuum pump oil changed and pulls are good vacuum. However, after spins are complete oil has started to accumulat within the chamber.  On my last run, the temperature was maintainced at the set 4°C until the end of the 2 hr run at which it started to fluate between 4°C and 30°C. This now occurs regardless of if the vacuum is on or if the rotor is spinning. Previous threads have suggested that the failure to sense temperataure correctly might be due to the accumulation of oil under and around the radiometer.  Suggestions?  

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Grebo
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