This article applies to all Ralston Field Gauge LC20 and Process Meter LC30 models.
Press and Hold the Menu/Up-Arrow Button.
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Press the Backlight/Right-Arrow Button to scroll to UNITS
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Press the Zero/Check Mark Button to enter the Units submenu.
The checkmark indicates the current units the Field Gauge/Process Meter is set to display.
If you do not wish to change engineering units, press the Menu/Up Arrow Button twice to return to the main pressure screen.
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Scroll to your desired engineering unit using the right and left buttons.
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