This entry refers to Go Direct® Force Plate (GDX-FP) and the version of Force Plate (FP-BTA) manufactured after November 2023. If you are unsure which force plate you have, please refer to Which force plate do I have?.
If your force plate readings are not consistent with expected readings you may find calibration necessary. Calibration of this vintage of force plate requires special attention to the following details, as it is possible that a poorly executed calibration will make your readings worse.
- Perform a 2-point calibration.
- The first point is zero with no mass on the force plate and the force plate resting on a level surface.
- The second point should be a weight that is at least 25 kg (or 50 lb).
- Do not exceed the range of the force plate.
- Note: 1 kg weighs 9.8 N.
- Gymnasium weights can be used, but you should verify their actual mass by some independent means.
- The weight should be symmetrical and placed accurately at the center of the force plate.
- Do not use a person as the second calibration value, as they will not be easily centered.
- You may consider placing a large metal washer at the center of plate upon which to rest the weight. This may be helpful in ensuring the force is applied to the center of the force plate.
The calibration screen can be accessed by clicking on the live meter in Graphical Analysis or the LabQuest app. Consult the instructions or help files appropriate to your software. See also How do I calibrate my sensor?.