LaMotte DC1600 Colorimeter User Manual
Page 38
PROCEDURE
1.
Rinse a clean colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 4 on “Select Wavelength” knob and press “30 Second Read” button.
3.
Insert tube into colorimeter chamber and adjust to 100%T with “Set Blank” knob. This is the 100%T blank.
4.
Remove tube from colorimeter and pour out water. Use the 10 mL graduated cylinder (0416) to measure 5 mL
of sample water and pour into colorimeter tube.
5.
Use the 5 mL syringe (0807) to add 5 mL of *Cyanuric Acid Test Solution (4856). Cap and mix thoroughly. A
precipitate will form if cyanuric acid is present. Wait 1 minute.
NOTE: This reagent bottle has a special fitting which enables the syringe to be inserted into the top of the bottle.
With syringe in place, invert bottle and withdraw syringe plunger until 5 mL of reagent is contained in the syringe
barrel. Remove syringe from reagent bottle and depress plunger to dispense into the tube.
6.
At end of 1 minute waiting period, mix thoroughly, press “30 Second Read” button and insert sample into colorimeter
chamber. Record %T as soon as reading stabilizes.
7.
Consult calibration chart to determine cynauric acid concentration in parts per million (ppm).
DC1600 CYANURIC ACID CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
5.8
6.5
7.2
7.9
8.5
9.2
9.9
10.7
11.4
12.1
80
12.9
13.6
14.4
15.1
15.9
16.7
17.5
18.3
19.2
20.0
70
20.9
21.7
22.6
23.5
24.4
25.3
26.2
27.2
28.2
29.1
60
30.1
31.1
32.1
33.1
34.2
35.3
36.4
37.5
38.6
39.8
50
40.9
42.1
43.4
44.6
45.9
47.2
48.5
49.9
51.3
52.7
40
54.1
55.6
57.1
58.7
60.3
61.9
63.6
65.3
67.1
68.9
30
70.7
72.7
74.6
76.7
78.8
80.9
83.2
85.5
87.9
90.4
20
93.0
95.7
98.5
101.4
104.4
107.6
110.9
114.4
118.2
122.0
10
126.1
130.4
135.0
140.0
145.3
151.0
157.1
163.8
171.6
179.3
0
188.4
198.7
210.5
38