This unit has been designed to study temperature measuring techniques and the modes of calibration of the relevant sensors by means of fixed points and of a thermometer provided with calibration certificate. It consists of a hot water bath and of an ice bath to determine precise reference points (boiling point and melting point of water) and variable temperatures. A set of thermometers of different types is fixed onto a support that can be moved from the hot bath to the ice bath. The available thermometers are:
• Reference Pt100 thermo-resistance with calibration certificate
• Industrial Pt100 thermoresistance
• Two K-type thermocouples
• PTC thermistor
• Inert gas thermometer
• Liquid thermometer
TRAINING PROGRAM
This unit enables to develop and analyze the following issues:
• Concepts of Celsius temperature measurement (temperature scales, conversions among scales, zero error and full-scale error, linearity errors)
• Properties and characteristic behaviours of the different systems of temperature measurement (thermoelectric
properties of a platinum resistance thermometer, of a thermocouple and of a thermistor, of a gas thermometer and
of a liquid thermometer, response speed)
• Calibration of thermometers by using fixed points or certified sensors
TECHNICAL CHARACTERISTICS:
• Thermal bath of AISI 304 stainless steel equipped with:
– stirrer
– shielded heating element
– safety level switch
• Dewar flask of stainless steel with high vacuum insulation, capacity of 1 litre
• Support for thermometers
• Reference Pt100 thermo-resistance with 3 points calibration certificate
• Industrial Pt100 thermo-resistance of class A
• K-type thermocouple equipped with 4-20 mA transmitter with “zero” and “span”
• Thermistor (PTC)
• Liquid thermometer
• Gas thermometer
• Electric console with 5 displays and controls
• Power supply: 230 Vac 50 Hz single-phase – 1700 VA (Other voltage and frequency on request)
