How to load Firmware (manual mode): Typically firmware should be loaded via TSshield. -Store a firmware *.exe file to the USB memory. -Insert the USB memory to the instrument’s USB port. -Turn on the instrument while holding "prism" + "light bulb" + "ON" key to enter “Update mode”. -Push ‘Yes’. Then, the update will start automatically. -After finishing installing, the instrument will be restarted automatically.