Development of automatic calibration system for electronic balances

Abstract

This research is aimed to develop the automatic internal calibration system of the electronic balance with inherent internal calibration function. The sensor system (temperature, humidity, atmospheric pressure, time ect.) and the microcontroller system will be assembled together. The communication between this assembled system and the electronic balance will be programmed with C language program via RS232 interface port for activating the internal calibration system of the electronic balance. In this research, the internal calibration system will be activated when each of these two conditions is changed from the setting value: the environmental temperature or the time. The microcontroller system will send the command to activate the internal calibration system of the electronic balance via RS232 port. The preliminary experiment shows that the electronic balance used in this research responses to the command by activating the internal calibration system when the parameters changed according to the setting conditions.