LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 58)

4. Rinse a clean tube (0290)
three times with the chlorine
standard. Fill the tube to the
10 mL line with the chlorine
standard. Cap the tube. Dry
the tube with a lint-free cloth. .
5. Open the meter lid. Insert the
tube into the chamber. Align
the index line on the tube
with the index arrow on the
meter. Close the lid. Press
ENTER
to scan the blank. The
screen will display Blank
Done for about 1 second and
then return to the Scan Free
Chlorine Menu.
Free Chlorine (L)
Scan Blank
Scan Free Chlorine
12:00:00 001/500
6. Remove the tube from the
meter. Add 5 drops of DPD
1A Free Chlorine reagent
(P-6740) and add 5 drops
of *DPD 1B Free Chlorine
reagent (P-6741). Cap and
invert to mix. The solution will
be pink if chlorine is present.
Read within 30 seconds.
DPD
1B
DPD
1A
7. Immediately insert the tube
into the meter. Align the index
line on the tube with the index
arrow on the meter. Close the
lid.
8. Press
ENTER
to scan the
Standard. The screen will
display Reading... for about 1
second. The result will appear
on the screen.
Free Chlorine (L)
0.99
ppm
Scan Free Chlorine
Scan Total Chlorine
12:00:00 001/500
58
Chlorine Calibration