KPS-LX20 • Digital light meter
3.3 Name and function of components
3.3.1 Plan view
(1) Opto-sensor protection cover
(2) Opto-sensor
(3) LCD display screen
(4) Compound key for main power and touch tone:
- Power on/off: Short press the key to activate the machine and
long press for 1 second to shut it down.
- Touch tone on/off: Under working mode, short press the key to
turn on and off the touch tone.
(5) Max and min values inquiry key
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