Lutron Electronics CL-2006 Operation Manual page 13

4) Zero chlorine calibration
* Insert the " Zero Chlorine standard solution into the
" Container " ( 3-2 , Fig. 1) and envelope in the " Cover "
( 3-1, Fig. 1 ) completely, other procedures please
refer to chapter 4-1, 4-2.
* Press " CAL Button " ( 3-5, Fig. 1 ) continuously
until the Display show the text " CAL " then release
the button.
* During the display show text " CAL ", press the
" CAL Button " ( 3-5, Fig. 1 ), the display will show
Now the meter is ready for the " Zero Chlorine "
calibration
CAL
0.00
CAL
ppm
ppm
11