1. Connect EM920 to serial port RS485. Open teraterm terminal on relevant port in PC, baud rate 19200.
2. Turn off device.
3. Press Scroll and Selector buttons and keep pressed until EM920 powers up and shows on LCD that it is waiting for download.
4. Insert ‘9’ as password in terminal.
5. Choose ‘b’ to set baudrate to 115200. Adjust baudrate in terminal as well.
6. Choose ‘p’ to program new HEX. Use File menu of terminal to browse to location of image HEX file.
7. Insert ‘q’ after download has finished