Features: Oya Expansion Test is an experiment to reflect the plasticity and cohesiveness of coal by testing the maximum shrinkage a and the maximum expansion b of the coal.
The advanced displacement sensor is used to replace the traditional recording drum, which makes the graphic drawing more accurate, simple and worry-free. The furnace temperature is automatically controlled according to the requirements of the national standard, and the control temperature value, heating speed, working time, and current opening are displayed in real time. Automatically draw the curve of furnace temperature over time Automatically draw the curve of the expansion displacement of two coal samples as a function of time Automatic calculation of softening temperature (T1) and start of expansion temperature (T2) Curing temperature (T3) maximum shrinkage (a) and maximum expansion (b) The relevant data of each test is automatically saved and can be queried at any time. Print coal sample expansion curve and analysis report Automatically diagnose common faults, and pop up prompt windows on the computer immediately And display various fault information and sound alarm According to the requirements of GB/T5450-1997, the computer controls the temperature of the host and draws graphics. It also can meet ASTM D5515 Real-time display of coal sample expansion curve. Real-time display control temperature value, heating rate, working time and current opening. It can run and control the experimental process online. Itcanautomatically calculate the softening temperature (T1), the starting expansion temperature (T2), the curing temperature (T3), the maximum shrinkage (a), and the maximum expansion (b). Print coal sample expansion curve and analysis report. It can automatically save the relevant data of each test, which can be inquired at any time.
Technical parameter Power: no more than 5kW Temperature measurement range: 0~999ºC Accuracy: Class 0.5 Resolution: 1ºC Time measurement range: 0~999min Timing accuracy: ±30s/24h Heating control: There are three preheating temperatures to choose from. After the formal test, the furnace temperature can be quickly returned to the temperature at the time of entering the furnace within 7 minutes, and then the temperature is increased at a rate of 3 °C/min. Has good temperature tracking performance. Power supply: 220V 50Hz Temperature measuring element: armored K-type thermocouple Displacement accuracy: ±1mm
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