JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• To impart the knowledge on metrology and different instruments used in industry for length, area, angle roughness/smoothness measurements
• To make the students able to analyze velocity, force and torque measuring instruments used in industry
• To give the students knowledge about different flow meters, pressure meters, density and level meters used in industry and their principles.

Course Outcomes

Upon successful completion of this course the student will be able to:

• Develop the ability to correctly design an instrument and make necessary adjustments for assigned laboratory tasks.
• Prepare the standards required for the calibration of certain laboratory instruments and industrial instruments used for pressure, flow, level etc.

UNIT - I

Metrology: Measurement of length – Plainness – Area – Diameter – Roughness – Angle – Comparators – Gauge blocks. Optical Methods for length and distance measurements. Velocity, Acceleration And Force Measurement: Relative velocity – Translational and Rotational velocity measurements – Revolution counters and Timers - Magnetic and Photoelectric pulse counting stroboscopic methods. Accelerometers-different types, Gyroscopes-applications. Force Measurement: Force measurement – Different methods –Gyroscopic Force Measurement – Vibrating wire Force transducer.

UNIT - III

Pressure and Flow Measurement: Basics of Pressure measurement – Deadweight Gauges and Manometer types – Force-Balance and Vibrating Cylinder Transducers – High and Low Pressure measurement – McLeod Gage, Knudsen Gage, Momentum Transfer Gages, Thermal Conductivity Gages, Ionization Gazes, Dual Gage Techniques,. Flow Measurement: Flow Meters- Head type, Area type (Rota meter), electromagnetic type, Positive displacement type, mass flow meter, ultrasonic type, vertex shedding type, Hotwire anemometer type, Laser Doppler Velocity meter.

UNIT - IV

Density and Level Measurement: Volume Flow meter plus Density measurements – Strain Gauge load cell method – Buoyancy method - Air pressure balance method – Gamma ray method – Vibrating probe method. Direct Mass Flow meters. Gauge glass techniques coupled with photoelectric readout system-Float type level indication-Different schemes-Boiler drum level measurement-Differential pressure method-

R16 B.TECH EIE.

electrical types of level gauges using resistance, capacitance, nuclear radiation and ultrasonic sensors.

UNIT - V

Radiation and Humidity Measurement: Radiation fundamentals, Radiation detectors, Radiation Thermometers, Optical Pyrometer, sound-Level Meter, Microphones, Time, Frequency and Phase-angle measurement, Liquid level, Humidity terms-Dry and Wert bulb psychrometers -Hot wire electrode type hygrometer-Dew cell-Electrolysis type Hygrometer- Commercial type dew point meter-Moisture terms-Different methods of moisture measurement-Moisture measurement.

TEXT BOOKS:

• 1. Measurement Systems – Applications and Design – by Doeblin E.O., 4/e, McGraw Hill International, 1990.
• 2. Principles of Industrial Instrumentation – Patranabis D. TMH. End edition 1997.

REFERENCE BOOKS:

• 1. Process Instruments and Control Handbook – by Considine D.M., 4/e, McGraw Hill International, 1993.
• 2. Mechanical and Industrial Measurements – by Jain R.K., Khanna Publishers, 1986.
• 3. Instrument Technology, vol. I – by Jones E.B., Butterworths, 1981. R16 B.TECH EIE.