3nh NR60CP, Operation Manual

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NR Series Precision Colorimeter
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2. White and Black Calibration
Press “MENU ” to enter the main menu. Select “Calibrate” to enter
manual white calibration and black calibration interface, as shown in
Figure 13.
Select “White Calibration” and press “Enter” button; the interface will
prompt you to put away the white calibration cover. Turn the colorimeter
upside down and make the measuring aperture upwards, then put the
white calibration board in the center of the colorimeter and make sure it
is closed to measuring aperture. Re-press “Testing” key to perform
white calibration.
Next step is black calibration: remove white calibration board. Select
“Black Calibration” and press “Enter” button, the instrument will prompt
to direct the measuring aperture to the air (please refer to the “Notes”
under Figure 13). Re-press “Enter” again or press “Testing” key to
perform black calibration.
Then, white calibration and black calibration are completed.
Figure 13 White and Black Calibration