AUTOMATIC CONTROL OF HEATER IN LabVIEW

Temperature control is a very tedious process that requires lot of care and additional features for ensuring safety. The temperature control of a heater placed inside a cylindrical circulating tank, almost involves all the process parameters to be controlled. LabVIEW is a graphical design software that enables the controlling of temperature of the water in the cylindrical tank model, by operating the heater.NI ELVIS provides a platform for the effective control of hot water temperature in such a way that the temperature of the tank follows the set point ranges. The major challenge in the project is to control the operation of the heater, for the temperature to be within the specified range. The temperature sensor output is fed to LabVIEW program and this parameter is programmed to get through many comparisons .The heater in the circulating tank is operated through ,ELVIS module compatible micro-relay and relay circuits ,by using the voltage generated from the module through the program.The process variable, controller output, set point ranges are clearly displayed using charts and the data is recorded for future analysis in the form of excel sheets.The heater status is also made wireless, using NI-Elvis and NIC card module. The wireless interface enables remote access to the system and to monitor the process parameters of the process station from any place that is away from the field , in industries.