Measuring equipment of ac-dc voltage and waveforms, Electrical Engineering

Procedures and methods of the experiments

A).     In order to measure the true RMS values of the currents and voltages, students used the true RMS multimeter. It requires two probes, which were already inserted in the multimeter, one was black and one was red probe. The black probe was always inserted in the COM knobe of the multimeter and the red probe was changed according to the measuring characteristics either the current or the voltages.

B).     Digital multimeter, it was used to measure the values of the components including the currents, voltages, resistances, capacitances and junction diodes forward voltages. Similarly it also has two probes, black and red, black probe is inserted in the similar way in COM port and the red port is used for measuring purpose. We measure the different values of the components by selecting the selector at the desired location and touch the probes to the component under test. For example, in order to measure the resistance, the selector should be at the position of ohm, similar for capacitance, the selector direction should be towards the CAP and so on.

However, the basic laws are the same what the students have studied in the basic electrical course. For example, for measuring the resistance or currents, Ohm's law is to be implemented and the basic equation can be given as follows

Current = voltage/resistance, I=V/R,iR1=VR1/R1

C).Signal generator (SG) is used to generate the signal with different frequency ranges from 10Hz to MHz. It can generate sine as well as square wave with 5V rms (sine) value to 10V (square) peak-to-peak value. Students perform this operation using the main selection knobes, i.e., either the square wave output or the sine wave output. In the similar fashion as was the multimeter, students can use two probes to take the input from the signal generator and giving the input to the desired circuit or can be measured the value using the multimeter.

D). Digital Storage Oscilloscope (DSO) is very important device used to measure and see the shape of the waveform generated either by signal generator or coming from the component of the circuit. It also has very sensitive probes, which are used to do the measurement. The advantage of this is also the results can be printed with all the readings and shape of the waveform and can be used to publish.The oscilloscope measured voltages versus time.

The working principle of the oscilloscope is to converting the voltage between the terminals into the digital data using the analog-to-digital converter (ADC), which allows the data to be stored into the memory and displayed on the screen. It has two axis, vertical and horizontal. Amplitude of the signal was measured in volts per division using the vertical axis and time scale in time units per division was measured using the horizontal axis.The other important feature of the oscilloscope is to represent the number of channel to be displayed.

Posted Date: 2/21/2013 4:22:28 AM | Location : United States

Related Discussions:- Measuring equipment of ac-dc voltage and waveforms, Assignment Help, Ask Question on Measuring equipment of ac-dc voltage and waveforms, Get Answer, Expert's Help, Measuring equipment of ac-dc voltage and waveforms Discussions

Write discussion on Measuring equipment of ac-dc voltage and waveforms
Your posts are moderated
Related Questions
Explain immediate data addressing mode (with examples) available in microprocessors. Immediate Mode: The operand given in immediate mode is the actual data itself.

By a simple time multiplexing of natural samples over a single line, a large radar site transmits 85 analog signals, each with 200-Hz bandwidth. If the sampling is done at twice th

Q. Describe about digital communication systems fl A digital signal can be deflned as having any one of a finite number of discrete amplitudes at any given time. The signal coul

I want to know whether the circuits for both methods(linear polarization resistance and electrochemical impedance spectroscopy) are same or not?

Explain IDIV instructions in 8086 family with example and their effect on flag. IDIV: It used to divide a 16-bit signed number with an 8-bit signed no. or 32 bit signed numb

Q. In the magnetic circuit shown in Figure the center leg has the same cross-sectional area as each of the outer legs. The coil has 400 turns. The permeability of iron may be a

I want project ideas.

Q. For the circuits shown in Figure, sketch the frequency response (magnitude and phase) of ¯V out / ¯V in .

Performance Equations of Three Phase Induction Motor When balanced 3-? voltages are applied to the  stator  winding  a rotating magnetic field  of constant amplitude is produc

how to determine the peak inverse voltage across ideal diodes