bmen_305_lab_2

bmen_305_lab_2 - Lab 2: Introduction to NI ELVIS BMEN 305...

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Lab 2: Introduction to NI ELVIS BMEN 305 Nicole Girsch and Katherine Wood
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Table of Contents Introduction…………………………………………………………………. .p.3 Materials and Methods………………………………………………………p.3 Results and Discussion……………………………………………………….p.4 Conclusion ……………………………………………………………………p.9
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Introduction The purpose of this lab is to become familiar with NI ELVIS, which is a data acquisition system combining oscilloscopes, function generators, power supplies, and multimeters into a single laboratory unification tool. This lab also taught students how NI ELVIS can be interfaced with LabVIEW to create a powerful operating environment where data can undergo signal processing and analysis. The basics of data acquisition are taught in this lab, which is a tool that will be very useful in future labs. Materials and Methods: Materials: - 1.0 kΩ resistor - 2x red diodes - 2.2 kΩ resistor - 2x yellow diodes - 1.0 MΩ resistor - 2x green diodes - 1.0 μF capacitor - uA741 op-amp Part 1: Digital Multimeter In part 1 of the lab, the resistance of each resistor was measured using NI ELVIS digital multimeter. Once the values were confirmed to be close to the marked values, the same was done with the capacitors. The circuit given in the lab was constructed, shown below as circuit diagram 1. The DMM connected to voltage HI and voltage LO. Using the digital multimeter the voltage across the 2.2 KOhm resistor was measured. Then, the circuit was modified to circuit diagram 2, shown below. The voltage across the capacitor was measured by turning off the power and watching the voltage rise when the power was turned on. The circuit was again modified to circuit diagram 3, shown below. The output voltage of the op- amp was measured. Circuit Diagram 1: Used to measure voltage across the 2.2K resistor.
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Circuit Diagram 2: Used to measure voltage across the capacitor. Circuit Diagram 3: Used to measure output voltage. Part II: Interfacing with LabView In part 2, circuit diagram 4, shown below, was constructed. A VI in lab view was constructed. The VI is shown below in Figure 1. The DAQ Assistants had acquisition mode of N samples at 100 samples to read and 1000 Hz sampling rate. Next, the 1MOhm resistor was replaced with a 1KOhm resistor and the VI was run again.
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Circuit diagram 4: used to generate graph for capacitor voltage. Figure 1: Block diagram used to create waveform graph.
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bmen_305_lab_2 - Lab 2: Introduction to NI ELVIS BMEN 305...

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