Unformatted text preview: the Virtual Bench Data Logger and record runs of two minutes in length. Suggested settings for the logger are shown in Figure 4 with timing and file settings as shown in Figures 5 and 6. During this experiment you will want to convert the voltage values that you record into temperature in degrees Celsius, the nominal calibration equation below may be used for our thermistor circuit: T (Celsius) = -17.58 V (volts) + 69.18 Using this equation with a typical starting voltage of 2.52 (Figure 3) gives a room temperature of about 25C. If you feel that your thermistor has drifted significantly from the nominal calibration, you may adjust the offset value (69.18) as you think appropriate. However, specific temperature values are not too important in this lab since most of the calculations are based on relative temperature variations, including (T - T lab ) and dT/dt. Figure 5. Timing Arrangements 4 of 9...
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- Spring '09
- Absolute Zero, General Conference on Weights and Measures, Celsius, Turn, Thermodynamic temperature