I am working on the development of an instrument which can be simply thought of as a cantilever tube. This tube is instrumented with strain gauges to measure the X/Y strains and two sets of rosettes, each consisting of two strain gauges at 45 degree. Note that the X/Y are 3-wire half bridge and the rosettes (for torque) are full bridge. I have been having several issues with this instrument and I am trying to figure them out one at a time. First of all, when I apply a small load (around 1 N) I get an output of around 12 N if not more. Would anyone know why the gauges seem to be so sensitive to the loads? I have taken into consideration the gains of the amplifier and filter in the circuit. Would lead wire resistance be the culprit despite it being a 3-wire connection (which apparently negates its effect)? What about soldering? That's my first of many questions! Any help is appreciated!