When a uniform metallic cylinder of finite diameter D and length L, which has one end fixed and the other end free to twist, twisted, then the cylinder suffers torsion. The deformation of the cylinder is a measure of torque. Strain gauge/s bonded on the surface of this cylinder, in strategic positions provides scope for measurement of torsion suffered by the cylinder. The experimental module has two mechanical parts, fastened. a) A torque transducer and b) 1 meter long bar of uniform cross section. One end of 1-meter long uniform bar is connected to the free end of the Torque transducer while the other end is connected to a weighing pan. Weights can be suspended at the other end of this bar, such that the torque transducer is subjected to angular rotation, but prevented, as the other end of this cylinder is fixed. Now a relation between the strain measured w.r.t. the applications of different weights are studied.

A built-in 3 1/2 digit display indicates the torque in terms of Kgm. For example, a weight of 1Kg, placed at a distance of 1-meter (1000 mm) from the transducer is indicated as 1000 on the digital meter. When the same weight 1-Kg placed at 500mm distance from the transducer it is indicted as 500 on the digital display. Thus for several weights in the range of 50gm to 1000 gms in multiples of 50 gms can be added. These weights are placed at different distances from the transducer, and the KgM characteristics can be studied. The trainer consists of torque transducer, Graduated 1meter long arm, instrumentation amplifiers, built-in power supply, and assorted weights. 3 1/2 digit display.

Specifications:

• Capacity: 1Kg
• Strain gauge impedance: 350 Ohms, connected in bridge configuration.
• Excitation: 9VDC
• Display: 3 1/2digit
• Power supply: Built-in
• 1-Meter long arm fixed on a metal chassis. The arm is graduated from 0 to 1meter in steps of 10Cm.
• Weights: Assorted weights, to measure upto 1Kg in steps of 50gm.
• Interface: This works as an interface to any Data Acquisition system or to DAS-1.