User Manual

12
Below table indicated for information about the functional button operations.
Button Operation Performed
HOLD button
l Press BLUE button once to turn the display backlight on.
l Press BLUE button again to turn the display backlight off.
l Display backlight will NOT be automatically off unless pressing
the BLUE button
BLUE button
l Press HOLD once to enter hold mode.
l Press HOLD again to exit hold mode.
l In Hold mode, H is displayed and the present value is shown.
Functional Buttons
Model GDM-350A: OPERATING MANUAL