Functional Buttons
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.
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Model UT33B/C/D: OPERATING MANUAL
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