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ELEC 273 Lab Report #1 Concordia University
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ELEC 273 Lab Report #1 Concordia University
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ELEC 273 Lab Report #1 Concordia UniversityEXPERIMENT 1
FAMILIARIZATION WITH LAB INSTRUMENTS
OBJECTIVE: To become familiar with the measuring instruments and other
equipment used in the lab:
• Digital Multimeters (DMMs)
• Function Generator (FG)
• Digital-Storage-Oscilloscope (DSO)
• DC Power Supplies
• R-Chassis
• RLC-Chassis
INTRODUCTION:
This experiment was conducted to familiarize with the laboratory instruments. Several
instruments were introduced and measurements were taken.
A digital multimeters (DMMs) approximates the ideal meters, ammeters, and
voltmeters. The Fluke Model 8010A and the Agilent 34405A Model are two typical
DMMs used in the lab, that also measures both direct current (DC) and alternate current
(AC). The digital multimeters can also measure other quantities such as resistance,
conductance, capacitance, and frequency. In addition, the Agilent 34405A can also
measure temperature (using a thermistor temperature probe). To prevent damage, a
DMM should not be left in the ammeter-mode after use.
The Instek GFG-8216A Function Generator (FG) is an analogue function generator that
displays periodic voltage waveforms and pulse signals that are used as test input signals.
It is a simple and easy to use instrument, using the dial knobs and buttons and an LCD
display for signal generation.
The Tektronix TDS320 Digital Storage Oscilloscope (DSO) measures and displays the
signals which can be controlled to display the desired result using the menu buttons and
knobs. It also contains a ‘HARDCOPY’ button that obtains a printout, located in the top
right corner of the front panel.
R-Chassis measures the DC. The circuit diagram is pasted on the top of the chassis. The
terminals on the chassis can be examined visually.
RLC-Chassis is an aluminum chassis on which R, L and C elements are mounted. The
value of R is from 100Ω to 10100Ω. And the values of L and C are L = 47mH and C = 22
nF, respectively.
, PROCEDURE:
1. Patchcord connections were made between the PSP and the R-Chassis using
banana-plug patchords.
2. The value of RL was set to approximately 221.7Ω (approximately 6 turns). The Vs
knob and Is knobs were both set to approximately 6 turns, resulting in V s and Is
outputs in the range of 4 ~ 9 Volts and 8~9 mA, respectively.
3. The Fluke 8010A DMM was set as an ammeter and the currents (I1, I2, I3) were
measured.
4. The Agilent 34405A DMM was set to measure the node voltages VE, VA, and VC.
5. The FG, DSO, and the RLC-Chassis were interconnected using the banana-plug
patchcords, using different lengths and colors.
6. The Frequencies of the waves were set, measured, and printed out.
RESULTS & DISCUSSION:
DC Currents –
• The Kirchhoff’s Current Law (KCL) equation is verified using the current
measurements from Step 3, where I1= 10.4 mA , I2 = 13.1 mA and I3 = 02.7 mA :
• I1 + I3 = I2
• 10.4 mA + 02.7 mA = 13.1 mA
• The node voltage measurements from Step 4 are used to obtain the branch voltages
VEA, VAB, VAC, and VCD; hence the Kirchhoff’s Voltage Law (KVL) is verified using the
following equations, where VEA = 5.255 V , VAB = 2.326 V , VAC = 0.826 V , VCD = 1.500
V, and VEF = 7.581 V. The validity of the KVL relations can be verified using the
following equations:
• VEA + VAB = VEA + VAC + VCD = VEF
• 5.255 V + 2.326 V = 5.255 V + 0.826 V + 1.500 V = 7.581 V
and
• VAC + VCD + VBA = 0
• 0.826 V + 1.500 V + ( -2.326 ) V = 0
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