LaMotte LTC3000wi Turbidity & Chlorine Lab Meter - Manual (Page 64)

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 Total Chlorine
menu.
Total Chlorine (T)
Scan Free Chlorine
Scan Total Chlorine
12:00:00 001/500
6. Remove the tube from the
meter. Add one *Chlorine
DPD #1 Instrument Grade
Tablet (6903A). Cap the tube.
Shake for 10 seconds. Invert
slowly 5 times. The solution
will be pink if Free Chlorine is
present.
7. Add one *Chlorine DPD #3
Instrument Grade Tablet
(6197). Cap the tube. Shake
for 10 seconds. Invert slowly
5 times. The solution will
be pink if Free Chlorine is
present.
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.
64
Chlorine Analysis