Measurement & Instrumentation

A dynamometer is a device used to measure torque absorbed or torque transmitted by rotating member. It helps to determine power produced or absorbed or delivered by rotating shaft.

Q Meter equipment is basically meant for measuring the quality factor or circuit magnification factor of coils. Apart from this, it is also used to measure the self-capacitance of RF coils, capacitance of small capacitors. Fig. 1 shows the pictorial view of a Q-meter.

The standard signal generator is a very useful instrument that is commonly used for testing and alignment of radio receivers. Fig. 1: Block Diagram of Standard Signal Generator.

An audio signal generator is a laboratory instrument that is commonly used for testing of Audio circuits. Fig. 1: Block Diagram of an Audio Signal Generator.

The function generator is versatile instrument that gives a number of different waveforms at the output with their frequencies that can be adjusted over a wide range.

Figure 1: Pressure Thermometer.

Fig. 1: Eddy current dynamometer. Working Principle of Eddy Current Dynamometer Eddy current dynamometer is electrical absorption dynamometer working on principle that, when isolated conductor moves through magnetic flux, it induces eddy current, which get dissipated in the form of heat.

Figure 1: Liquid in Glass Thermometer. Construction & Working of Liquid in Glass Thermometer Liquid in Glass Thermometer consists of glass envelope filled in with liquid and calibrated indicating scale marked on it. The envelope comprises a thick walled glass tube with a capillary bore and a spherical or cylindrical bulb filled with liquid.

Fig. 1: Bimetallic Thermometer (Bimetallic strip in spiral form) Working Principle of Bimetallic Thermometer Two different materials having different coefficient of thermal expansion rigidly joined together, one on other to form a bimetallic strip. 

McLeod gauge is a low pressure gauge and it is employed for the measurement of vacuum pressures. Figure 1: McLeod Gauge.