Electrical Measurements and Instrumentation A

Lecturer:

Petr Kašpar (gar.)

Tutor:

Petr Kašpar (gar.)

Supervisor:

Department of Measurement

Synopsis:

Electrical and electronic measuring instruments, digital instruments, methods of measurement of electrical quantities (voltage, current, power, frequency, resistance, capacitance and inductance), basic magnetic measurements, basics of measurement systems.

Requirements:

Syllabus of lectures:

The literature [1] will be referred during the lectures.

1. Accuracy of measurement. Analogue meters. PMMC meter.

2. Iron vane and electrodynamic meters. Measuring amplifiers with OA. Converters of average value.

3. DC and AC current and voltage measurement - methods and instrumentation, thermocouples application.

4. Measurement of frequency and phase shift, measurement of rotation speed.

5. DACs and ADCs. Digital multimeters.

6. RMS converters. Measurement of sum and difference. Analogue multipliers. Instrument transformers.

7. Measurement of power and energy (1- and 3-phase circuits).

8. Measurement of resistance - methods, instruments, converters. Resistance thermometers and strain gauges.

9. Measurement of impedance and admittance (L-R, C-G). Capacitive and inductive sensors.

10. Measurement of B, H, and magnetising characteristics.

11. Analogue and digitising oscilloscopes and recorders. Logic analysers.

12. Sampling methods of measurement. Instruments controlled by microcontrollers.

13. Data acquisition systems. Optoelectronic sensors.

14. Spectrum analysers. Generators of measuring signals.

Syllabus of tutorials:

1. Introduction, safety in lab. Oscilloscope - basic control and measurement.

2. Frequency dependence of AC voltmeters. Influence of form factor on meter readings.

3. Voltage divider. Measuring amplifiers (low DC voltage).

4. Frequency measurement. Phase shift measurement using counter and oscilloscope.

5. Measuring rectifier. Low currents measurement.

6. DA converters. Dual slope DVM.

7. Principle of signal sampling. One-phase active power using instrument transformer.

8. Three-phase power of imbalanced load. Test I

9. Measurement of low resistances. Imballanced Wheatstone bridge.

10. Digital impedance and admittance meter. Digitising oscilloscope, application of passive probe.

11. Amplitude permeability measurement. Measurement of the leakage magnetic field of the transformer.

12. IEEE 488 measurement system. Test II

13. Solving individual measurement tasks

14. Solving individual measurement tasks

Study Objective:

Study materials:

1. Haasz, V., Sedláček, M.: Electrical Measurements. Publ. House ČVUT,

Prague 2006

2. Sedláček, M., Holub, J., Hejtmanová, D.: Laboratory Exercises in

Electrical Measurements. Publ. House ČVUT, Prague 2005

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Heavy-current Engineering- structured studies (compulsory course)