LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 66)

3. Press
ENTER
to select Free
Chlorine.
Free Chlorine (L)
Scan Blank
Scan Free Chlorine
12:00:00 001/500
4. Rinse a clean tube (0290)
three times with the sample.
Fill the tube to the 10 mL line
with the sample. 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 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
66
Chlorine Analysis