AFT103 Temperature Measurement Didactic Equipment Heat Transfer Laboratory Equipment
1 Description Different physical processes are used to measure temperatures. Temperatures can be read off directly on a scale, e.g. by the expansion of a measuring medium. In industry, temperatures are often measured electronically. The advantage of electronic measurement is that further processing or transmission of signals to remote locations (controllers, external displays) is easier. It trainer can be used to carry out and compare different temperature measurement procedures. The trainer includes liquid thermometers, bimetal thermometers, as well as a thermocouple,a Pt100 resistance thermometer and an NTC thermistor, each with different protective sleeves, for electronic temperature measurement. A psychrometer with two liquid thermometers is used to measure the relative air humidity. To compare the different measuring methods, the temperature sensors being studied are attached to a height-adjustable device above the experimental tank. A fan ensures almost constant ambient conditions. A second tank with electronically controlled heater supplies water temperatures up to approx. 80°C. The heated water at a specified temperature is fed into the experimental tank. By lowering the height-adjustable device, the temperature sensors are immersed in the water and the temperature measurement begins. The measured values can be read as analogue or digital values. A 3-channel line recorder can record the measured values of the electronic temperature sensors continuously over time and thus also document the different time response. Defined temperature jumps and steady and transient temperature behaviour can be studied. 2 Specification steady and transient temperature measurement with typical measurement instruments temperature sensors: liquid thermometer, bimetal thermometer, Pt100, thermistor (NTC), type K thermocouple psychrometer for determining the relative air humidity defined temperature jumps up to 80°C experimental tank and heating tank with temperature control, water-filled both tanks equipped with stirring machine fan generates constant air temperature above the experimental tank 3-channel line recorder for recording the measured values 3 Technical data Heater output: 2kW at 230V, 1,5kW at 120V tank capacity: 4L Temperature controller PID Line recorder 3 channels serial interface Temperature sensors liquid thermometer with organic liquid bimetal thermometer psychrometer thermocouple type K thermistor (NTC) Pt100 Measuring ranges temperature: 0…100°C rel. humidity: 3…96% 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase Dimensions and weight LxWxH: 1200x700x1550mm Weight: approx. 185kg
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