Understanding Circuit Measurement Errors and Superposition Techniques
Explore the impact of ammeter and voltmeter errors on circuit measurements, learn about household wiring, and utilize the TPS-4000 dual voltage power supply. Experiment with superposition techniques to enhance measurement accuracy in electrical circuits.
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Presentation Transcript
EE-251 lab 3 Fall 2017 Malone
(Hint: for your Objective, you can say a bit more about what you will be measuring too) Several of you are just copying the above. If you have read the experiment, you know a bit more about what you will do.
Ammeter and volt meter error contributions: Ammeter has a small series resistance which can affect current measurements for some circuit evaluations. (we saw this with lab-1 where it did affect current measured values) Voltmeters have a large input resistance that sometimes can affect voltage measurements of circuits with higher resistances. (with the voltages on the resistance values we are reading, the voltmeter has an insignificant effect.) ------------------ The resistors we are using are 1% tolerance. We do expect some error. But don t emphasize that for your experimental work. Focus on errors between the calculated and measured values of the voltages and currents. If there are differences here, check your measurements or calculations.
You can also compare to your prelab calculations done with nominal values
For superposition, take two sets of measurements, one with Va shorted and one with Vb shorted. Then, carefully add the results. Don t short the power supply, just short the place where the voltage was. Ask for help if you are uncertain how to do this.
Dont short the power supply, just short the place where the voltage was
