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LaMotte DC1600 Colorimeter User Manual

Page 38

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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

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