Upgrading firmware 1. Make sure the MCPU firmware file with .BIN extention is available on your PC Hard Drive 2. The firmware can be downloaded from USB Memory. Copy the .BIN firmware file to the USB Flash drive and insert into USB Port of Instrument. 3. Confirm the instrument is OFF. While holding the LIGHT and PRISM keys, press ON to enter Update Mode. 4. The install will begin automatically. 5. After completing the install, the instrument will re-start.