Quote Originally Posted by salihangin View Post
Are you still using BTS?
I do have different problem in my lab: Three of force plates (Kistler) always start with 8 to 10 kg without loading. Sometimes when I disconnected the cables, they still show some weight as if they loaded.
Sorry, we do not use anymore our BTS system.

Your problem could be related to an offset value. Have you checked if you get correct values when removing this offset? Is this offset stable during a record, or is there a drift? If it is only an offset, you should be able to define an auto-zero function by recording for example the first 10 frames and removing the mean value obtained on each analog channel.

Best regards,
Florent.