LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 70)

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.
DPD
1B
DPD
1A
7. Add 5 drops of *DPD 3 Total
Chlorine reagent (P-6741).
Cap and invert to mix. An
increase in color represents
Combined Chlorine.
DPD
3
NOTE: For wastewater samples, Standard Methods for the Examination
of Water and Wastewater recommends waiting 2 minutes for full color
development when testing total chlorine.
8. 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.
9. Press
ENTER
to select Scan
Total Chlorine. The screen
will display Reading... for
about 1 second and then
return to the Total Chlorine
menu. Record the result as
Total Chlorine.
Total Chlorine (L)
1.25
ppm
Scan Free Chlorine
Scan Total Chlorine
12:00:00 001/500
*Warning: Reagents marked with an * are considered to be potential
health hazards. To view or print a Material Safety Data Sheet (MSDS)
70
Chlorine Analysis