To be honest, I'm not sure if it is an issue or not, but I am totally clueless.

I recently bought the Power2max Type S FSA Gossamer. My bike is on the trainer and I am off of it, and the watch finds the PM. When I go to calibrate the PM it comes up with the number -853.

Is this what it should be? Feel completely free to talk to me like a 2nd grader because I really do not have much of an idea on what I am doing here.

Thanks everyone