1. If only interested in the parameters calculated by the Metabolic Module, you can correct the calculation by going to:
Metabolic | Metabolic Settings | Environment, and change the Measuring section from Expired to Inspired.
2. You can use Arithmetic to invert the signal and values to give a negative deflection. To do this, use a spare Channel in LabChart and use the following Arithmetic calculation:
Where X is the Channel containing the original Spirometry Flow Data. It's important to also ensure you change the units to L/s, as the Arithmetic Calculation will default to Volts:
This approach is ideal if you need to export the raw data to a 3rd party Metabolic Analysis program.