11_MAE 334Woodward - lab2

11_MAE 334Woodward - lab2 - MAE 334 Lab 2 5 Click Start to...

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MAE 334 Lab 2 5. Click Start to begin data logging and then quickly move the thermocouple probe from the ice water to the hot water cup. Expect a transient like Figure 8. 6. Repeat steps 2 - 4, but reverse the direction of the step input (from hot to cold). 7. Repeat steps 2 - 4 with a smaller step input (from cold to warm). Repeat steps 2 - 4 with a step input from ice water to room air. When you expose the thermocouple probe to air, pull it through a paper towel as it leaves the ice water to quickly dry it to minimize the effect of evaporation. Log the data using the following new settings in the Timing Configuration window: Time Interval = 1 /sec, Stop After Elapsed Time = 10 minutes, Display Length = 10 minutes. That’s three ”water to water” step input data sets and one “water to air” step input data set. Processing the Dynamic Calibration Data The dynamic calibration focuses on evaluating the time constant of the first order model of the thermocouple probe’s dynamic behavior described by Equation (1) in the Further
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