Method

Performing a validation of a washer disinfector, the main thermometric tests to be performed are an empty chamber (distribution test) and standardized load. Both tests have to be performed 4 times and the results from the last 3 cycles have to be utilized.

The empty chamber tests have to be implemented first to find the coldest and hottest zone as these two zones have to be measured in the standardized load tests.

To document the homogenity of the chamber it is good to use statistics, then it is possible to find maximum and minimum values and it is also beneficial to find the delta between maximum and average  or average and minimum as these two values are good indicators for the distribution in the chamber.

With the knowledge from the empty chamber test, it is possible to continue with the standardized load test.

To document the disinfection effect of the washer disinfector and if the load is instruments, the measured temperatures have to give a higher A0 value than 3,000.