3nh NR10QC, Operation Manual

Page: 19 / 39

NR Series Precision Colorimeter
17
Notes :
1. When performing black calibration, direct the measuring port to the
air. Be sure the black calibration is starting in a dark , no bright light
source environment. Kee p the measuring port more than 1m away
from any reflective items (hands, desks, walls etc.).
2. No need to enforce black and white calibra tion. Once turning it on,
you can start the measurement . It is suggested to perform
calibration in following occasions : first use, great change of the
environment, long-term unused or inaccura te data.
3. Tolerance Setting
Select “Tolerance” in main menu to enter tolerance setting interface, as
shown in Figure 14. You can add or subtract the number in which the
cursor is positioned through “Up” and “Down” button. After setting the
number to the needed one, press “Enter” button, the cursor will jump to
the last number. When the cursor is in the last number, press “Enter”
button to save the settings and return to the main menu.
If you don’t want to set or modify the tolerance, you can press “Back”
button to return to the main menu.
Figure 14 Tolerance Setting