| 摘要 |
PURPOSE:To carry out the liquid level monitoring of the thermal fluid of high viscosity effectively by setting the thermal sensor at a predetermined liquid level of the tank with the agitator and monitoring the movement of the liquid level due to the difference in temperature between the atmospheric temperature and the liquid temperature on the liquid level to be detected by the sensor. CONSTITUTION:The agitator 2 is disposed in the tank 1 and the thermal fluid of the agitator is transferred to other device through the valve 3. The thermocouple 8, 9 are inserted from outside into the tank 1. The temperature determining portions are set at required upper limit and the lower limit of the liquid level. In the liquid level monitor of the lower limit, the signal thetad generated by the thermocouple 8 including the temperature determining portion 10 is compared with the set value theta1 given by the setting device 12 by the comparator 5 and the signal 1 is added to the function generator 17. In the upper limit liquid level monitoring, the signal thetau including the temperature determining portion 11 and generated by the thermocouple 9 is compared with the set value theta2 given by the setting device 13 by the comparator 16 and the signal 2 is given to the function generator 18 and the movement in the liquid level due to the difference in temperature between the atmospheric temperature and the liquid temperature on the liquid surface which the respective temperature determining portions 10, 11 detect is monitored and the alarm is emitted from the alarming devices 18, 19. |
