LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 67)

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
sample. The screen will
display Reading... for about 1
second. The result will appear
on the screen. Record the
result as Free Chlorine.
Free Chlorine (L)
0.99
ppm
Scan Free Chlorine
Scan Total Chlorine
12:00:00 001/500
9. Remove the tube from the
meter. 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.
10. 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.
67
Chlorine Analysis