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Products | Theory of Machines and Properties of Materials | Stress and Strain Analysis | FL 090

FL 090

Strain Gauge Demonstration Unit

Technical Description

The FL 090 benchtop unit provides an introduction to the techniques of resistance measurement using a strain gauge. Strain gauges are used to measure tension and torsion loads. Basic functions, such as temperature influence, zero point compensation and strain gauge applications are easy to demonstrate. In the basic design of the FL 090 a steel bar is used. It is clamped and a load applied with weights. Strain gauges are fitted to the bar and connected in a full bridge. The magnitude of the imbalance in the bridge corresponds to the mechanical stress in the material under load. Accessories allow various tensile tests and a torque test. The system is suitable for practical experiments in small groups and for demonstration purposes in presentations.

Learning Objectives / Experiments

- Generation and measurement of mechanical
stresses on a bending bar with a strain gauge
application
- Temperature influence and zero point
compensation

In conjunction with accessories:
- Generation and measurement of mechanical
stresses on a tension bar and a torsion bar with a
strain gauge application
- Comparison of different tensile tests on steel, brass
and aluminium

Features

* Clear demonstration of the functioning of a strain
gauge on a bending bar₁
* Temperature compensation₁
* Tension and torsion rod available as accessories

Alternative products

FL 100 -- Strain Gauge Training System
FL 102 -- Strain Gauge Calibration Apparatus
IA 120 -- Principles of Industrial Sensors

Specification

[1] Strain gauge application on a bending bar
[2] Strain gauge with 2 supplementary resistors and temperature compensation strain gauge connected in Wheatstone bridge
[3] Zero point compensation with turn potentiometer
[4] Temperature compensation and active strain gauge connected by laboratory connector
[5] Front panel with circuit diagram, volt meter, laboratory sockets and turn potentiometer
[6] Loading using weights
[7] Strain gauge amplifier and power supply in housing
[8] 230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 ph.

Technical Data

Steel bending bar:

- cross-section: 20x6mm

- lever arm: 285mm
- distance between strain gauge and load:
approx. 290mm
Strain gauge:

- k factor: 2.05

- resistance: 350 Ohm
- temperature compensation

- 2 supplementary resistors: 350 Ohm each

- power supply Ue: 10V
Analogue millivolt meter: +/- 10mV
Set of weights: 1x5N, 4x10N, 1x hanger 5N

Dimensions and Weight

l x w x h : 300 x 200 x 400 mm
Weight : approx. 14 kg

Connections

230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 ph.

Scope of Delivery

1 demonstration unit

1 set of weights

1 set of laboratory cables

1 instruction manual

Order Details

021.09000 FL 090 Strain Gauge Demonstration
Unit