Lab7 Temperature Measurement using LabVIEW

Lab7 Temperature Measurement using LabVIEW - 7 7.1...

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7 T EMPERATURE MEASUREMENT USING L AB V IEW ® 7.1 O BJECTIVES This lab is designed to give students experience in LabVIEW®, with a common application of temperature measurement. The objectives of this lab are: 1. To understand the development environment of LabVIEW® using a front panel and a block diagram 2. Gain experience in building an accurate temperature sensing circuit containing a commercially available thermistor (semiconductor temperature sensor) using its data sheet 3. Calibrate the sensor using the triple point of water 7.2 I NTRODUCTION Temperature measurements are very common in processing environments. The standard for temperature measurement is documented in the International Temperature Scale of 1990 ( ITS-90 ). The most common temperature sensor is the Thermocouple, due to its wide range, and relatively low costs. However, Thermocouple systems require special attention to details such as metal-metal interfacing, and reference junctions. A simpler method is to use a low-cost semiconductor transducer such as the LM 135/235/335 Precision Temperature Sensor. These devices are very simple to use and calibrate, and they give a direct (although small) voltage output that can be directly measured using a Analog/Digital converter. The voltage output of the sensor is directly related to the absolute
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This note was uploaded on 11/30/2010 for the course ABE ABE taught by Professor Tonygrift during the Spring '10 term at University of Illinois, Urbana Champaign.

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Lab7 Temperature Measurement using LabVIEW - 7 7.1...

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