modern sterilizers are subjected during their lifetimes because the W and H Lisa is a Class B vacuum sterilizer a steam penetration test must be carried out as described in your national hygiene and decontamination guidelines there are two types of steam penetration test W and H recommends the steam penetration test with the helix PCD test set since this test is the most relevant for dentistry a helix test is required as part of the manufacturers instruction manual and in accordance with the National hygiene and decontamination guidelines a positive test result must show that sufficient air has been removed during the sterilization cycle a helix test cycle should be one of the first cycles carried out before the sterilizer is used in normal operation remove the cap of the helix test device folds the helix indicator test strip so that the chemical indicator is facing inwards push the folded indicator test strip into the cap and assembled the test device place the test device on a storage tray push the storage tray into the middle of a rack placed inside the sterilizer during a helix test cycle the test device must be the only thing inside the sterilizer there must be no dental instruments inside the sterilization chamber at the same time close the door and select the helix test from the cycle selection screen there must be no dental instruments inside the sterilization chamber at the same time as soon as the test cycle is complete remove the test device from the sterilizer when removing it be aware that the test device is very hot allow the test device to cool the indicator test strip can now be removed from the test device in the event of a positive test result the indicator strip will have changed color completely and there will be no color variation once a positive helix test cycle has been completed your Lesa sterilizer is ready for normal operation again we recommend in accordance with your national guidelines that you document all test results in a sterilization test log book and that you retain the indicator test strips the Lesa sterilizer saves the digital test reports in the device memory and also on the USB stick if available wh people have priority