OPERATION AND MEASUREMENT
MQ series quantum meters are designed with a user-friendly interface allowing quick and easy measurements.
To power the meter, slide the included battery (CR2320) into the battery holder, after removing the
battery door from the meter’s back panel. The positive side (designated by a “+” sign) should be facing out from
the meter circuit board.
Press the power button to activate the LCD display. After two minutes of non-activity the meter will
revert to sleep mode and the display will shut off to conserve battery life.
Press the mode button to access the main menu, where manual or automatic logging are selected, and
where the meter can be reset.
Press the sample button to log a reading while taking manual measurements.
Press the up button to make selections in the main menu. This button is also used to view and scroll
through the logged measurements on the LCD display.
Press the down button to make selections in the main menu. This button is also used to view and scroll
through the logged measurements on the LCD display.
Calibration: To choose between sunlight and electric light calibration, push the mode button once and use the
up/down buttons to make the appropriate selection (SUN or ELEC). Once the desired mode is blinking, press the
mode button three more times to exit the menu.
Logging: To choose between manual or automatic logging, push the mode button twice and use the up/down
buttons to make the appropriate selection (SMPL or LOG). Once the desired mode is blinking, press the mode
button two more times to exit the menu. When in SMPL mode press the sample button to record up to 99 manual
measurements (a counter in the upper right hand corner of the LCD display indicates the total number of saved
measurements). When in LOG mode the meter will power on/off to make a measurement every 30 seconds. Every
The LCD display consists of the total number of logged
measurements in the upper right hand corner, the
real-time PPFD value in the center, and the selected
menu options along the bottom.
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