How to get altitide data from in activity file to be usefull in the CIQ simulator?

I try to create an app and for this I need to read altitude data from one of the sensors.
Whe displaying the values in my app on the watch, the values make perfect sense. When I download the file for my activity and try to use it in CIQ simulator the values absolutely make no sense. The values vary from 2000 to 40000. Can one of you please describe how to use the simulator with values from an activity? Thanks in advance.