Key Features:

• Self-contained bench-mounting unit for experiments with nine different popular temperature measuring devices, and a thermowell to show temperature lag
• Uses a platinum resistance thermometer as a reference to accurately calibrate the other devices
• Demonstrates how electrical resistance devices and thermocouples work, their characteristics and how to connect them correctly to reduce measurement errors
• Includes liquid-in-glass thermometers with safe non-toxic liquid – no mercury
• Hand-held digital thermometer for thermal infrared measurements
• Built-in water heater tank with protective guard and drain tap for safe experiments
• Built-in pressure sensor (barometer) with display of local water boiling temperature
• Works with TecQuipment’s Versatile Data Acquisition System (VDAS®) for simple and reliable recording and processing of results

Description:

• It includes eight different temperature measurement devices and shows their characteristics and how to calibrate them against a standard. A display shows the temperature from the reference sensor and the local (barometric) pressure from the built-in pressure sensor.
• Students add crushed ice (not supplied) to the insulated
  icebox and clean water to the fully guarded water heater
  tank. A carefully rated immersion heater in the tank heats the water steadily up to boiling, giving time to take accurate results
• To the right of the temperature indicator strip, a window allows students to test the thermal infrared thermometer on a matt black or brushed steel surface of the heater tank. This shows limitations of infrared measurements caused by surfaces of different emissivity.
• The electronic circuits also include:
  • An amplifier to increase the output of the thermocouples for more useful voltage measurement.
  • Constant current and voltage sources, and a resistive bridge. These show the problems with different measurement circuits and power sources for electrical temperature measurement devices.

Learning Outcomes:

• Simulation of two, three and four wire connection of a
  platinum resistance thermometer (PRT)
• Constant current and voltage sources
• Calibration and linearity of temperature measurement devices and temperature lag
• Thermal infrared temperature measurement on surfaces of different emissivity
• Thermocouples in series, parallel and the Seebeck effect
• Resistance in thermocouple circuits