- Course No E – 1777
- PDH Units: 2
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$50.00
- Course No E – 1777
- PDH Units: 2
$50.00
Intended Audience: electrical, instrumentation & control engineers, energy auditors, O & M professionals, contractors, estimators, facility managers and general audience.
PDH UNITS: 2
Temperature is a principle parameter that needs to be monitored and controlled in most engineering applications such as heating, cooling, drying and storage. Temperature can be measured via a diverse array of sensors. All of them infer temperature by sensing some change in a physical characteristic be it a thermal expansion, thermoelectricity, electrical resistance or thermal radiation. There are four basic types of temperature measuring devices, each working on a different principle:
- Mechanical (liquid-in-glass thermometers, bimetallic strips, bulb & capillary, pressure type etc.)
- Thermocouples
- Thermo-resistive (RTDs and thermistors)
- Radiative (infrared and optical pyrometers)
Learning Objectives
Upon completion of the course, the student should understand:- Learn various types of temperature sensors;
- Understand the principle of operation of thermocouples (Peltier effect, Thompson effect and Seebeck effect);
- Describe the basic construction of a thermocouple including materials used;
- Understand the three laws of thermocouples (law of intermediate metals, law of intermediate temperatures and law of additive voltages);
- Describe the difference between grounded, ungrounded and exposed junctions;
- Describe the basic principle and construction of RTD’s and Thermistors;
- Understand the difference between the two main types of thermistors i.e. positive; temperature coefficient (PTC) and negative temperature coefficient (NTC);
- Explain how RTD resistance varies for increase and decrease of temperatures using bridge circuits;
- Describe the basic principles of radiative temperature measurement including infrared and optical pyrometers.
