Diagnosis
In thermal gas billing &v1&, the register already takes the pressureinto account.
Therefore, you only have to enter the from-measured pressure and theto-measured pressure to receive a proposed gas procedure for the deviceinstallation.

Procedure
If you have selected thermal gas billing 02, and require the pressurefor calculating the compressibility, select the Separate pressure field
If you have selected thermal gas billing 03, you can only maintain thefrom-measured pressure and the to-measured pressure, since the pressureis not required for other calculations in this case.