1. Update or download & install the latest version of the FieldLab Desktop app on your Windows computer to Version 1.40.4 or later.
2. Navigate to Tests Modes in FieldLab Desktop

3. Select an existing test, or create a new one.

4. Select the Custom Pressure Unit from the Test Mode Units Field.
Edit or create a new Test and add your Custom Unit in the Test Mode Units dropdown menu.
If you have this Test Mode on a FieldLab already, you will be prompted with a reminder to sync the FieldLab with updated the Test Mode settings.