Determining the gauge factor of strain gauges Calibration of a strain gauge: measurement of deflection and strain Features - measurement of deflection and strain - determination of the gauge factor of strain gauges Learning objectives/experiments - fundamentals of measurement using strain gauges - measurement of deflection using a dial gauge - determination of the gauge factor of strain gauges Specification [1] investigation of deflection and strain to determine gauge factor [2] bending bar with 2 strain gauges on the compression side and tension side respectively [3] strain gauge configured as full bridge [4] 2-point ball bearing mounting of bar permits purely bending load application [5] mechanical load application device with spindle, handwheel and cross-arm [6] dial gauge with adjustable dial for direct measurement of deflection [7] measuring amplifier with 4-digit digital display Technical data Bending bar made of steel: 660x25x12mm Strain gauge application - full bridge, 350 Ohm - 2 strain gauges on the top and underside of the bar respectively Measuring amplifier - measuring range: ±2mV/V - resolution: 1µV/V - zero balancing adjustment range: ±1mV - supply voltage: 10VDC Dial gauge - 0...20mm - graduation: 0,01mm 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase, 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 660x200x430mm Weight: approx. 20kg