Strain Measurement Setup for Linear Range and Sensitivity Determination

Objective:

• To determine the linear range of operation and sensitivity of strain measurement.

• To study the application of strain gauges and their use in measuring strain.

• To explore the bridge configuration of strain gauges and the necessary signal conditioning circuits.

Setup Description:

• The setup uses a cantilever beam arrangement to apply strain on a strain gauge.

• Strain gauges are securely cemented to the cantilever at the point where strain is to be measured.

• Weights are placed on the free end of the cantilever to generate strain.

• The strain developed causes a change in the resistance of the strain gauge, which is detected using a full-bridge configuration.

• The strain value is displayed on a 3½ digit LED display, showing strain in microstrain units.

• Different weights are provided for experiments on linearity and sensitivity.

Technical Specifications:

• Strain Gauge (350Ω): 4 units

• Gauge Factor: 2.1

• Maximum Bearable Weight: 500 gm

• Cantilever Material: Stainless Steel

• Cantilever Dimensions:

  • Width: 2.5 cm

  • Thickness: 0.16 cm

  • Length: 20 cm

• Bridge Voltage: +8 V

• McBride Configuration: Full Bridge

• Display: 3½ Digit LED

• Test Points: 8 points

• Power Supply: 230 V ±10%, 50 Hz

• Operating Conditions: 0-40°C, 85% RH

Accessories Included:

• Mains cord (1 no.)

• Standard weights (1 set)

Additional Information:

• The experimental setup comes with a detailed experiment manual for conducting tests and understanding the principles of strain measurement.