Experiment No: 2 - Electronic Workshop Lab

Experiment No: 2

Familiarization of Electronic Measuring Instruments like Voltmeters, Ammeters, Miltimetrers, LCR-Q meter, Power Supplies, CRO, DSO, Function Generator and Frequency Counter. 

Aim:

a)     Study of Voltmeters & Power Supplies and to find the Voltages across the Resistor of different steps of input voltages using Voltmeter of given circuit.

b)     Study of Ammeter and to find the Currents using Ammeter of different load resistors of given circuit.

c)      Study of Multimeter and to find Voltages, Currents & different parameters.

d)  Study of LCR-Q meter and to find Inductance, Capacitance and Resistance using LCR-Q meter.

e)      Study of CRO and DSO and to find the Amplitude & Frequency using CRO & DSO.

f)       Study of Function Generator & Frequency Counter and to observe wave forms in CRO.

Components and Equipments Required:

S.NO	Components / Equipments	Range	Quantity
1	Regulated Power Supply	(0-30V DC)	1
2	Voltmeters	(0-20V DC)	1
3	Ammeters	(0-100 mAmps)	1
4	Multimeter		1
5	Decade Resistance Box (DRB)	0-100 Mohms	1
6	Capacitors, Inductors and Resistors	Different Ranges	-
7	LCR – Q meter		1
8	CRO & DSO   and Probes	(0-30MHz)	1
9	Function Generator & Frequency Meter	(0-30MHz)	1
10	Bread Board		1

Circuit Diagram 1:

Fig1. Measuring of Voltages and Currents

Circuit Diagram 2:

Fig2. Measuring of Time Period

Procedure:

Part 1:

1. Connections are made as per the circuit diagram1.
2. The RPS +ve is connected to the one end of the resistor and RPS –ve is connected to the other end of the resistor.
3. Switch on the power supply and increases the input voltage (supply voltage) in Steps.
4. Note down the corresponding current flowing through the resistor and voltage across the resistor for each and every step of the input voltage using Voltmeter and Ammeter.
5. Repeat the same procedure to measure the voltage and current by using Digital Multimeter(DMM)
6. Repeat the same procedure to measure the voltage and current by using CRO and DSO
7. The reading of voltages and currents are tabulated.

Part 2:

a.       Connect the circuit as shown in circuit diagram2

b.      Apply the input of 1V peak-to-peak and 1 KHz frequency using Function Generator.

c.       Measure the Output Voltage Vo (p-p) and time period for various input frequencies.

Part 3:

a.       Measure the different values of Inductors, Capacitors and Resistors using LCQ-meter

b.      The reading of values are tabulated

Tabular forms:

Practical Calculations:

R_L = Constant

S.No	Applied Voltage (Vi)	Voltage(V)			Current(mAmps)
		Voltmeter	DMM	CRO	Voltmeter	DMM	CRO

V_i = 5V

S.No	Load Resistance (RL) Using DRB	Voltage(V)			Current(mAmps)
		Voltmeter	DMM	CRO	Voltmeter	DMM	CRO

Part-2:            Vin = 1V at Function Generator

S.No	Frequency	Amplitude(Voltage)	Time Period

Part-3:           

#	Different Inductors		Different Capacitors		Different Resistors
	Original Value of Inductor	LCR-Q Meter Value	Original Value of Capacitor	LCR-Q Meter Value	Original Value of Resistor	LCR-Q Meter Value

Model Graphs:

Precautions:

1. Connections are made as per the circuit diagram and should be tight.

2. Do not connect power to a circuit until the circuit is finished and never work on a circuit while power is applied.

3. If anything is burning, immediately disconnect the power and examine your circuit to find out the problem.

Outcomes:

Results: