LaMotte TC-3000 Tri-Meter - Manual (Page 46)

4. Press
*IOK to select Test Free
Chlorine.
C h l o r i n e ( T )
* T e s t F r e e
T e s t T o t a l
1 6 : 0 2 : 1 9 0 1 / 0 4 / 0 5
5. Rinse a clean tube (0290) with the
chlorine standard. Fill the tube to
the 10 mL line with the sample
water. Dry the tube with a lint-free
cloth. Put on a dry positioning ring.
Cap the tube.
6. Open the meter lid. Insert the tube
into the chamber. Align the index
notch on the positioning ring with
the index arrow on the meter. Close
the lid and press *I
OK to select
Scan Blank .
F r e e C h l o r i n e ( T )
* S c a n S a m p l e
€
1 6 : 0 2 : 1 9 0 1 / 0 4 / 0 5
7. Remove the tube from the meter.
Pour off all but a sufficient amount
of chlorine standard to cover a
tablet. Add one *Chlorine DPD #1
Instrument Grade Tablet (6903).
Crush tablet with a tablet crusher
(0175), then add chlorine standard
until the tube is filled to the 10 mL
line. Cap tube and shake until
tablet has dissolved. Solution will
turn pink if free chlorine is present.
Wait 15 seconds but no longer
than 30 seconds. Mix.
8. Open the meter lid. Insert tube into
chamber. Align the index notch on
the positioning ring with the index
arrow on the meter. Close lid, select
*IOK to select Scan Sample.
F r e e C h l o r i n e ( T )
* S c a n S a m p l e
€
1 6 : 0 2 : 1 9 0 1 / 0 4 / 0 5
46 ANALYSIS & CALIBRATION • CHLORINE