FL 100 Strain gauge training system

Strain gauges are used extensively in sensor systems to detect forces, moments and deformations.

The FL 100 experimental unit provides a wide-ranging introduction to the fundamentals of measurement by strain gauges. Three test specimens for tension, bending and torsion are each fitted with four strain gauge measuring points. The strain gauges are wired in the full bridge. The specimens are loaded incrementally allowing for the strain reading to be sequentially monitored.
The specimens can be inserted quickly and precisely into the frame. The strain gauge measuring range is protected by a Plexiglas cover, which also makes it clearly visible for inspection purposes. The measuring amplifier supplies the bridge supply voltage, and displays the load-dependent “bridge detuning” digitally in voltage values. The digital display also features a zero balancing function to allow for any preloading.

The various elements of the experiment are clearly laid-out and housed securely in a storage system.

Three additional tension bars are available as accessories, in brass (FL 100.01), copper (FL 100.02) and aluminium (FL 100.03), enabling the modulus of elasticity to be ascertained in experiments.

  • basic introduction to measurement with strain gauges
  • test bars for tension, bending and torsion with strain gauge measuring points as full bridge
  • universal 1-channel measuring amplifier

Tension bar

  • measuring length: 50mm
  • cross-section: 2x10mm2
  • modulus of elasticity: 191000N/mm2
  • Poisson’s ratio: 0,305

Bending bar

  • length: 385mm
  • cross-section: 5x20mm2
  • modulus of elasticity: 210000N/mm2
  • section modulus: 74,26mm3

Torsion bar

  • length: 500mm, Ø=10mm
  • section modulus: 196,3mm3
  • shear modulus: 80000N/mm2

Weights

  • small: 10x 0,5N, 1x 1N (hanger)
  • large: 1x 5N, 2x 10N, 1x 20N, 1x 5N (hanger)

Strain gauge measuring point: full bridge, 350Ω

Amplifier

  • measuring range: ±24mV
  • resolution: 1µV
  • zero balancing adjustment range: ±1mV
  • supply voltage: 10VDC

Frame opening WxH: 480x450mm

 

230V, 50Hz, 1 phase
230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
UL/CSA optional

  1. experimental unit investigating the fundamentals of strain gauge measurement
  2. tension, bending and torsion tests each with strain gauge measuring points in full bridge circuit
  3. strain gauge application areas protected by Plexiglas cover
  4. steel test bodies
  5. measuring amplifier with 4-digit digital display
  6. frame to house the measuring objects
  7. determination of modulus of elasticity on various materials using measuring objects FL 100.01, FL 100.02, FL 100.03
  8. storage system to house the components
  • fundamentals of measuring with strain gauges
  • strain gauge types and application techniques
  • calculation of the mechanical deformations under tension, bending and torsion
  • correlation between mechanical strain and electrical resistance in a strain gauge
  • with FL 100.01, FL 100.02, FL 100.03: determination of the modulus of elasticity for various materials from the measuring data of a tensile test

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Product number

FL 100

FL-100

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