TCH Pro 202 and 203: Firmware Upgrade Procedure:
– Download and uncompress the latest firmware for your unit
– Press and hold Power button
– Press Reset button with a paper clip. For button location, see Quick Start Guide.
– Release Power Button. You should now see the Firmware Upgrade Screen. If you do not see this screen, press Power and Reset buttons simultaneously again.
– Connect Particle Analyzer to PC with USB cable
– Open Windows Firmware Update Tool and follow on-screen instructions
– Power button is disabled in upgrade mode. To restart the unit without upgrading, press Reset button.