Below is the HTM01-05 Periodic Test Schedule for Ultrasonic Cleaners that should be followed if manufacturer or PCT recommendations are not available.
It is a generic schedule created from the methods within the various legislative guidelines used to create HTM01-05.
HTM01-05 Periodic Testing & Validation Schedule for Ultrasonic Cleaners
Daily Requirements:
Clean Filters
What is it? House keeping as instructed by the machine manual.
Cleaning Efficacy Visual Check
What is it? This is a visual inspection of a processed load to check that there are no signs of soiling or staining. No test products are required, however a record must be kept of each inspection as evidence.
Weekly Requirements
Safety Checks
What is it? Tasks as instructed by the machine manual to ensure safe operation.
Protein Residue Test
What is it? This is a chemical test to detect levels of protein on a processed load that cannot be seen by visual inspection. A Protein Detection Method is required to perform this test. Take an instrument from a processed load and test using the preferred protein detection method. For test procedure refer to the instructions provided with the testing product.
Quarterly Requirements
Automatic Control Test
What is it? This is an observational test that records the operation of the machine and demonstrates that the process is repeatable by compairing the results against previous tests. The observer should note the length of the cycle along with the temperatures reached using the machines own display. A successful test should demonstrate that correct temperatures as stated in the machines own manual are being reached, that the door cannot be opened during the cycle if the machine has a lid, and that a ‘Cycle Complete’ indication is provided.
Cleaning Efficacy Test
What is it? This test presents a difficult cleaning challenge to the machine and the ability to clean a heavily soiled load. A Test Soil and a Protein Detection Method are both required to perform this test. There are two parts to the test. Firstly, place the test soil into the machine and run a cycle. When the cycle is complete visually check the test soil for any signs of soiling or staining and record the result. Secondly, using the same Protein Dectection method as the weekly Protein Residue Test, chemically check to make sure that no soil remains and record the result.
Ultrasonic Activity Test
What is it? Not to be confused with the Cleaning Efficacy test, this test checks to make sure that the transducers beneath the bath are working correctly and that instruments are being processed correctly no matter where they are placed within the tank. Commonly known as the ‘Foil Test’ or ‘Foil Ablation Test’. Strips of foil are suspended evenly in the bath in a 3×3 grid. After a cycle has been performed the cavitations will have formed an erosion pattern on the foil. A successful test will have all nine foil strips showing approximately the same erosion pattern, proving that cavitations are evenly spread throughout the bath.
CP(D) Engineer Validation
What is it? Not to be confused with a machine service. A machine validation proves that the machine is performing as dictated in HTM01-05 and creates a ‘snapshot’ of machine performance. The proceedure should be carried out by a qualified validation engineer. HTM guidelines require that four performance validation ‘snapshots’ are required during an annual period as this procedure is more likely to identify any problems with the machines performance. A validation report should be issued by the engineer after each proceedure for filing with the machines records as evidence of machine performance.
Annual Requirements
Repeat all Quarterly Requirements
What is it? Annual tests are a repeat of all quarterly requirements.
HTM01-05 states that manufacturer guidelines should take precedent over the schedule listed above and should be sought out to ensure that any machine specific testing and validation requirements are being carried out
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