Thank you for the clarification Pugsy, I had no idea.

My machine is the first link that you posted.

I appreciate the quick response. It seems I'll have to do some research and find a good auto machine or at least one that records data so that I can figure it out as I go.

Hello all, I hope everyone is doing well. I'm a new user to both the forum and CPAP machines and was hoping that you lovely lot could help steer me in the right direction. I have a Phillips Respironics REMstar Plus, that I acquired from a friend, and I have absolutely no idea what my starting level ...