This function is only available to Administrators.
Recalibrating a FitMachine is a very easy process which can be performed by anyone with Administrator privileges on your Dashboard. This can be done by going into the Devices page which can be found in the User Menu under Admin Tools. Select the FitMachine you'd like to recalibrate and press the blue Recalibrate box. This will bring up a dialog box to confirm the recalibration by pressing the red Recalibrate Now box.
The FitMachine calibration process requires 5000 running samples in order to complete and as a result you will not be able to recalibrate if the FitMachine has not sent enough samples.