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Transcript
The Characteristic of an N.T.C Thermistor The NTC Thermistor consists of two wires of different material, one of them is alumel, other one is chromel. This two wires connect one end which is called hot junction, other ends is separated which called cold junction. This type of construction is named NTC Thermistor. Output voltage can be obtained temperature difference between the two ends of wire which are hot and cold. This output voltage can change linearly depends on magnitude of the temperature difference. In our experiment, we connected the circuits as shown in our datasheet (experiment11, figure3). In this circuit also have a amplifier gain which provide us see difference easily. In addition, we adjusted the voltmeter to the 200mV DC range and set the gain course to 10 and gain fine to 0,2. In this way, we adjust the offset control for the zero initial conditions. After that we start to heat our NTC Thermistor from the hot end and obtain the temperature difference. This difference provide us voltage. We continuous to heat our material and we saw linearly increasing voltage, and we tabled in the Table1. Table 1 And then, we graph the difference of the temperature and output of the voltage as shown Figure1. Figure1 The N.T.C Thermistor are made from a pressed disc or cast chip of a semiconductor. Because of increasing number of able to moving electrons which temperature reason, the thermistor can work. If we apply more charge carriers, the thermistor can conduct more current. And also we measure the current with ammeter. In real world, there are many applications N.T.C Thermistor. For example, the resistance thermometers use this thermistor in the low temperatures. Another example, NTC Thermistor are regularly used in automotive applications such as showing the coolant temperature or oil temperature inside the engine. Another instance, NTC thermistors are used in the Food Handling and Processing industry, especially for food storage systems and food preparation. Maintaining the correct temperature is critical to prevent food borne illness. Also this examples, NTC thermistors are used throughout the Consumer Appliance industry for measuring temperature. Toasters, coffee makers, refrigerators, freezers, hair dryers, etc. all rely on thermistors for proper temperature control. Shortly we can understand that the NTC thermistor is used a lot of different applications. Engin Kaya 040100672