Why is there a reference pressure for EqLA results?
(Or Flow, Permeability, ACH results?)
The results are all referenced to a single pressure, the reference pressure. The reference pressure is dictated by the standard with which the test is trying to comply.
Induced building pressure is directly proportional to airflow rate through a building, and EqLA is directly proportional to airflow rate; so that a higher induced building pressure would be a higher EqLA. Hence, there needs to be a reference pressure when referring to a leakage or flow result.
For the ASTM standard, the leakage result is required to be at a reference pressure of 50 Pa, whereas it is 75 Pa for the USACE standard. Reference pressure also applies to permeability (e.g. CFM/ft2) and air change (ACH) results.
Uninstalling FanTestic will NOT remove any of your test files or reports, it will only uninstall the program files.
It is generally a good practice to regularly back your test and report data to a different location.
Uninstalling FanTestic will also NOT uninstall the DM-2 USB driver. You should still be able to see it listed as installed in your Control Panel after you restart the computer.
Click the "Reset to Standard Default" button in the Advanced settings menu, to ensure default program parameters are used.
If this is the Error you are seeing:
"Cannot continue. The application is improperly formatted. Contact the application vendor for assistance."
Click on the "Details" button to get more information. In the summary, you will see:
ERROR SUMMARY: "+ Your Web browser settings do not allow you to run signed applications."
This error summary indicates that there are security settings in your web browser that are preventing the application from being able to download.
Some people have had success by adding http://retrotec.com to their "Trusted Sites" in the Tools>>Internet Options>>Security settings window in Internet Explorer:
How to set the Internet Exploror Tools>>Internet Options>>Security>>Trusted Sites>> Sites
If you previously had to use the "ADMIN" shortcut to allow FanTestic to find your DM-2 then you need to make sure that the previous version of FanTestic and all shortcuts to it are removed from your computer.
Uninstall FanTestic completely from your computer using the Control Panel (choose the Remove from computer option, not the Revert to a previous version option if you are presented with a choice). Uninstalling FanTestic will NOT uninstall the DM-2 USB driver. You should still be able to see the Driver listed as installed in your Control Panel after you restart the computer.
Delete all FanTestic shortcuts on your desktop, including the one labeled ADMIN if it is present.
Restart your computer.
Install the latest version of FanTestic from the website.
Follow the procedure as outlined in the document "Solve DM-2 Access Denied