Control of temperatures and pressures within the autoclave should fall within the control set points and correlate to steam tables. If excursions are identified then there are several potential route causes:
- Calibration – Has this been performed recently and the correct off sets applied?
- Superheated Steam – Perform Steam Quality Testing Superheat test.
- Localised Dry Heat – High temperatures are often seen by thermocouples placed on paper and mop heads. This is caused by paper absorbing the moisture from the steam. We recommend placing a Biological Indicator in these locations to confirm kill.
- High Jacket Temperature – If your autoclave is jacketed the temperature of the jacket should be lower than the autoclave control temperature.
- High Temperatures in Vessels – Often referred to as Adiabatic Expansion or the Venturi Effect, as the steam expands entering the vessel the temperature increases.
If you need any assistance with autoclave validation or steam quality testing please contact us.