- Equipments Dual Trace Oscilloscope Function Generator Resistor 1 4 W 1 K Capacitor 0 022 Uf Inductor 10 Mh Breadboard 1 (186.53 KiB) Viewed 30 times
- Equipments Dual Trace Oscilloscope Function Generator Resistor 1 4 W 1 K Capacitor 0 022 Uf Inductor 10 Mh Breadboard 2 (86.58 KiB) Viewed 30 times
EQUIPMENTS Dual-trace oscilloscope Function Generator Resistor (1/4 W) 1 k Capacitor 0.022 µF Inductor 10 mH Breadboard Note For all theoretical calculation results students are strictly required to show their work in progress in formula, complete figures in the PRELAB space provided before the lab session. Otherwise they will be forbidden from participating the session. There will be certain marks allocated for this part. PROCEDURE 1. Construct the circuit as depicted in Figure 5.6 below. Insert the measured value of R in Table la. C = 0.022 uF L = 10 mH HE CH1 Ip-p Figure 5.6: Circuit diagram of a series RLC circuit 2. Set the function generator to produce a sine wave input signal of amplitude 8Vp-p and frequency 5 kHz. Use this input voltage as the reference signal. 3. Obtain the Vs and VR traces on the scope. Draw the waveforms in Figure R1 and label them completely with the details. Since the resistor voltage VR is in phase with the current I, thus the phase difference between Vs and VR equals to the phase angle between Vs and I waveforms. CH1 4. Determine the number of horizontal divisions for one complete cycle of either waveform denoted as D₁ and the horizontal divisions for the phase shift between the Vs and VR denoted as D₂. Now determine the phase shift, 01 in degrees using Equation 5.1. Insert all the measured values in Table 1. From the results of Figure R1 and Table la represente 4 signals VR and I in both polar and rectangular forms and insert the answers in Table 2. Determine Ip-p from ohm's law, Ip-p= VR(p-p)/Rmeasured. Also determine the total impedance, ZT = Vs/Ip-p. + V₁<0₂- 5. Secondly, obtain the Vs and VC traces on the scope by interchanging the position of resistor and capacitor as depicted in Figure 5.7. The elements need to exchange positions to avoid "shorting out" of the resistor and inductor if we simply place the probe of the scope across the capacitor of Figure 5.6. In other words we must ensure the common ground between the generator and scope. Draw the waveforms in Figure R2 and label them completely with the details. + V₁ <0, R CH1 CH2 R = 1 k C Vc<0₂ 'p-p с Figure 5.7: Measuring Vc using the oscilloscope and ensuring common ground between the source and output 6. Determine the number of horizontal divisions for one complete cycle of either waveform denoted as D1 and the horizontal divisions for the phase shift between the Vs and VC denoted as D2. Now determine the phase shift, 02 in degrees using Equation 5.1. Insert all the measured values in Table 1. From the results of Figure R2 and Table la represent the signal VC in both polar and rectangular forms and insert the answer in Table 2. 1K50₁- CH2 7. Thirdly, obtain the Vs and VL traces on the scope by interchanging the position of resistor and inductor as depicted in Figure 5.8. Draw the waveforms in Figure R3 and label them completely with the details. +V,<9,- CH2 m +V,<0,- Figure 5.8: Measuring V₁ using the oscilloscope and ensuring common ground between the source and output
8. Determine the number of horizontal divisions for one complete cycle of either waveform denoted as Di and the horizontal divisions for the phase shift between the Vs and VL denoted as D2. Now determine the phase shift, 03 in degrees using Equation 5.1. Insert all the measured values in Table 1. From the results of Figure R3 and Table la represent the signal VL in both polar and rectangular forms and insert the answer in Table 2. Name: PRELAB CALCULATION ***Please complete this section before you enter the lab session. (All calculations should be done in peak-peak values and at the operating frequency 5 kHz). 1. Calculate the phasor current, Ip-p and phasor impedance, ZT 2. Obtain the phasor voltages for VR, VC and VL. Matrix No: 3. Calculate the phase angle of overall circuit. Instructor Approval: 4. Determine phase angle between the reference signal Vs and the following and specify whether it is leading or lagging the reference: (i) VR (ii) VC (iii) VL Name: 5. Calculate the phase angle between: (i) VR and IR Matrix No: (ii) Vc and Ic Date: Date: (iii) VL and IL Date: