User`s guide

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Document 4: Optional Activities
1. Create a shared data file for the class; consolidate measured internal pressure from all the
students. What is the average and standard deviation of the measured value? What are
some of the possible causes of these variations?
2. Take two data recordings, one with the DAQ Assistants’ input voltage range set to -10V
to 10V, one with it set to -2V to 2V. Analyze the data and find out the resolution of each
recording. Why are they different?
3. Read the user manual for the signal conditioner and change the gain setting. Compare the
resolutions of strain readings under different gains.
4. A US nickel weighs 5 grams. Stack nickels on the further end of the beam after the
completing the set-up of this experiment. Calculate measured strain when 1 to 10 nickels
are on the beam. Compare the results with theoretical values. What are possible causes of
deviations? Plot the results. If there is any nonlinearity, try to explain it.
5. Measure the elastic modulus in another way: apply various known weight onto the beam
and plot the measured strains with calculated theoretical stresses. Modify the VI for this
purpose if interested. Compare this measurement result with the result from vibration
measurement and theoretical value.