Mesa has become aware that there is an error in our DataTrace data logging software, DT Pro, that may cause lethality to be calculated incorrectly for those who downloaded DT Pro prior to March 9, 2015. Due to the nature of the error, lethality becomes over-calculated, resulting in higher-than-correct values. This error affects only those users who perform lethality calculations in degrees F (Fahrenheit) or if using a different Z value than 18 in degrees F or 10 in degrees C. All lethality calculations in degrees C (Celsius) are performed correctly within DT Pro using the standard Z value of 10.
We developed a fix that corrects the equation values. This correction is available as an executable installer that will replace a single DLL file in the DT Pro installation directory. This should not adversely affect your validation as it is not a change to any of the main operating programming code and is outside of the scope of validation.
For further information regarding this issue and how the lethality calculation is affected, please refer to our technical document.
In the meantime, if you have any questions or concerns regarding this issue or the download, please contact DataTrace’s Product Manager Bradley Pickard today at 303-987-8000 ext. 10176 or via email at firstname.lastname@example.org.
- Save the attachments to a folder on your local drive
- Extract the files contained in “DTCalc_DLL_Upgrade.zip”
- You will now find an installer file named: “DTCalc_DLL_Upgrade.EXE”
- Shutdown DT Pro
- Double-click “DTCalc_DLL_Upgrade.EXE” to execute and perform the update
- Restart DT Pro and run Lethality calculations as you would normally
- Once this correction is applied, please confirm all lethality settings are correct before running any calculations.