Press and hold the Menu/Up Arrow Button until you see MENU on the screen.
Press the Backlight/Right Arrow Button to scroll to FIRMWARE.
Press the Zero/Checkmark Button to view firmware version.
View Firmware Version on a Field Gauge LC20 and Process Meter LC30
Ralston Instruments continually releases updates that improve the features of your Ralston Gauge with new firmware releases, which you can update for free. This article shows you how to see what version of firmware is installed on your Field Gauge and Process Meter.