Lesson 1 - Temperature Measurement Principles and Indicators
Temperature and temperature scales; Heat; Change of state; Measuring instruments; Color change and melting point indicators
Learning Objectives:– Define thermal energy and explain the relationships among thermal energy, heat, and temperature in a substance.
– Correlate changes in temperature with changes in a substance's physical state.
– Compare four temperature scales, and convert temperature readings from one scale to another.
– Explain how primary and secondary temperature calibration standards are used.
– Describe various temperature-measuring devices and contrast thermometers and pyrometers.
Lesson 2 - Bimetallic & Fluid-Filled Temp. Instruments
Bimetallic, liquid-in-glass, and filled-system thermometers; Liquid- and gas-filled systems; Vapor-pressure systems; Capillary and bourdon tubes; Temperature transmitters
Learning Objectives:– Discuss the physical characteristics and operation of bimetallic thermometers.
– Describe how liquid-in-glass thermometers are constructed and how they operate.
– Compare liquid-, gas-, and vapor-filled systems and discuss their advantages and disadvantages.
– Explain how a mercury thermometer operates.
Lesson 3 - Electrical Instruments
Resistance thermometers; Wheatstone bridge circuits; RTD elements; Thermistors; Thermocouples; Compensation
Learning Objectives:– Discuss the relationship between temperature and electrical resistance.
– Describe the function of RTD bridge circuits and explain how to calculate lead-wire errors.
– Compare the accuracy, response time, stability, and circuit complexity of RTDs and thermistors.
– Describe the operation of a thermocouple and explain how to compensate for changes in the reference junction temperature.
Lesson 4 - Pyrometry
Principles; Effects of emittance and temperature; Wavelength of radiated energy; Pyrometers
Learning Objectives:– Discuss the principles that govern noncontact thermal measurements.
– Define electromagnetic radiation and emittance.
– Discuss the characteristics of a blackbody.
– Describe the effects of temperature and emittance on radiation intensity.
– Describe the operation of optical and radiation pyrometers.
Lesson 5 - Temp. Instrument Maint. & Calibration
Calibration standards; Instrument inspections; Controlled-temperature environments; Triple-point and ice baths; Calibration and testing
Learning Objectives:– Compare and define primary, secondary, and working calibration standards.
– Describe typical testing procedures for temperature-measuring instruments.
– Describe routine maintenance and calibration procedures for temperature-measuring instruments.
– Explain how to use controlled-temperature environments-ice baths, triple-point baths, fluid baths, and fluidized baths.
– Explain how to calibrate liquid-in-glass thermometers, thermocouples, resistance thermometers, and pyrometers.