Kaye ValProbe RT - Kaye ValProbe RT Humidity Logger

Chapter 12: Qualification Reports
ValProbe RT User Manual 143
Some Calculations such as MKT and Time of Sterilization are calculated inside the software
and cannot be set in the setup file:
• If the MKT calculation is desired the value of Heat activation can be set.
Note: Changes to lethality calculations are only allowed if the adequate permission is
permitted inside preferences. Changes to D-Value can be permitted inside policies.
Lethality and Time of Sterilization
New European regulation have placed and
emphasis on ensuring proper steam quality when
calculating lethality. For this reason, Kaye has
added additional options which if checked, only
calculate the Instantaneous lethality for the
timestamp if the Saturation Pressure and
Temperature are within defined limits set in the
Time of Sterilization calculation.
The Time of Sterilization calculates the total time of sterilization by combining the Steam
quality criterion, along with the measured reference temperature. Time is counted if the
measured reference temperature is at or above the process temperature and the steam quality
as defined by Temperature minus calculated Saturation Temperature (T-Sat) is within the
specified range.
Figure 181: Time of Sterilization – Definition of Limits
Select Back to return to the Edit Parameters screen.
If Edits are completed or no edits were required, select the Next arrow to proceed.