This experiment was conducted in order to analyze temperature measurement through close observation of a K-Type and a T-Type thermocouple, a Thermistor and a hot plate. Each instrument was calibrated with respect to boiling water and Ice water in order to obtain results required.
Bias Errors and precision uncertainty of instruments were discussed with respect to the plots obtained. The most accurate apparatus out of the two types of thermocouples and the Thermistor was determined to be the K-Type thermocouple with respect to boiling water. The most accurate hot plate channel was determined to be K15 which was immersed in the deepest hole.
[...] The Thermistor was pulled out of the ice and the water baths three times in order to get three readings for each the hot water bath calibration and for the Ice water bath calibration Hot Plate The K-Type thermocouples were observed extensively by placing them on a hot plate and measuring the corresponding resistances recorded by the multi- meter. The data was then recorded by the aid of a Lab View program. The different wires leading to their respective channel numbers were placed in various different positions on the hot plate as displayed in Table 1. [...]
[...] The thermocouple junctions were first immersed in a boiling water bath and then in an ice water bath and the temperature fluctuations were measured and recorded by a LabView program (Fig 1). Fig K & T Type Thermocouple Junctions For each calibration temperature (Boiling water and ice water) three temperatures were measured and recorded for each type of thermocouple. Then plots were generated in order to observe the temperature distribution of the different types of the thermocouples, steady state and transient response and to determine base errors. [...]
[...] Plot Relationship between Average Measured and Average Actual Temperature for a T-Type Thermocouples Plot Relationship between Average Measured and Average Actual Temperature for K-Type Thermocouples 3.2 Thermistor The following plot (plot 10) displays the relationship between the measured temperature and the actual temperature of a thermistor. The output received from the thermistor (resistance in kΩ) was converted in to Ω and then substituted in to the steinhart equation in torder to obtain the temperature in Kelvin. Plot 10: Relationship between Measured and Actual Temperature for a Thermistor According to the computed values tabulated in table 2 the least error is present in the K-Type thermocouple. [...]
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