Multicomponent Force Plate for Biomechanics Type 9287C…
5.5 Temperature Influences
The temperature coefficient of the sensitivity is negligibly
small (sensitivity change with temperature, the entire force
plate being at the same temperature).
Temperature gradients on the other hand give rise to an
error signal in the form of drift. This temperature drift is a
function of the heat input.
If all 4 vertical F
z1
… F
z4
signals drift in a similar way, it is
almost always due to thermal drift.
Keep the force plate at constant temperature to pre-
vent temperature drift.
The zero offset is automatically compensated by the Reset
function of the amplifier.
Caution!
Protect the force plate from direct sun light.
5.6 Polarity of the Measuring Signal
5.6.1 x and y Directions
When a force acts on the surface and in the direction of
the engraved arrow, a negative charge results on the corre-
sponding connector. It is converted into a positive output
voltage in the charge amplifier.
5.6.2 z Direction
A compressive force (vertical to the supporting surface)
likewise generates a negative charge signal and hence a
positive output voltage on the charge amplifier.
Pag
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