LaMotte TC-3000 Tri-Meter - Manual (Page 41)

11. Remove the tube from the
chamber. Add 5 drops of *DPD 3
Total Chlorine Reagent (P-6741).
Cap and mix. An increase in color
represents combined chlorine.
Note: For wastewater samples, Standard Methods for the Examination of Water and
Wastewater recommends waiting 2 minutes for full color development.
12. Open the meter lid. Insert the
sample into the chamber. Align the
index notch on the positioning ring
with the index arrow on the meter.
Close lid, select
*IOK to select
Total Chlorine .
F r e e C h l o r i n e ( L )
1 . 0 0
p p m
* T o t a l C h l o r i n e
~ €
1 6 : 0 2 : 1 9 0 1 / 0 4 / 0 5
13. Record the result as Total Chlorine. T o t a l C h l o r i n e ( L )
1 . 2 5
p p m
* S c a n S a m p l e
~
1 6 : 0 2 : 1 9 0 1 / 0 4 / 0 5
14. Subtract the Free Chlorine reading
from the Total Chlorine reading to
obtain the concentration of
Combined Chlorine. Total
Chlorine –
Free
Chlorine =
Combined
Chlorine
15. Press
OFF to turn the meter off or
press
to exit to a previous menu
or make another menu selection.
ANALYSIS & CALIBRATION • CHLORINE 41
DPD
3