The RTC& Printer interface PCB reads the weight data(from R5.0V1 PCB)& time data (from RTC PCB)simultaneously this time stamp ids printed out on the serial printer if ENTER key (K1),On this board is pressed .This data can also be sent to a PC via RS 232 i9nterface card not shown in the diagram .useful header data like address or slogans can be entered & stored in the EEPROM of the RTC & printer interface PCB.This information may also be printed along with time stamp the customer has to enter the ascii.