You can set up a new metric from the Winery Setup window (Setup Options > Production > Metrics):

1. Click  Set Up in the sidebar.
2. Click Lab.
3. From the Metrics tile, click Configure.
4. Click New Metric. The Metric window displays.

6. Specify the details for the metric. Be sure to enter the correct value for the PPM to g/L Factor.
7. Click Save.