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