What do the parameters for calculating lethality mean?
How can you use in Tecnosoft systems?
Lethality is a time and its value is used to evaluate a thermal process such as sterilisation or pasteurisation.
The variables that have to be set in the formula are:
Tr (Reference temperature): the theoretical temperature at which the process should stay constantly. Usually the given information are: “I sterilize at 121°C for 10 minutes”. 121°C is the reference temperature.
Z: this is also a temperature, indicating the increase of temperature to be applied to the Reference temperature to reduce the time to a tenth. This parameter is connected to a specific microorganism. For example, if it takes 10 minutes at 121°C to have a specific reduction of a specific microorganism and the Z value is 10°C for that specific microorganisms, it will take 1 minute at 131°C to obtain the same reduction.
Min: the minimum temperature from which to start the Lethality calculation. All contributions to the final result recorded with temperatures lower than the one set in the Min field will not be taken into consideration.
Do you have to monitor a pasteurisation and/or sterilisation process?
Use reliable systems such as those of Tecnosoft and its software!