LaMotte DC1600 Colorimeter User Manual
Page 82
PROCEDURE
1.
Rinse a clean colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 1 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. Use the 0.1 g spoon (0699) to add one measure of *Sulfate Reagent (V-6277). Cap
and shake until powder dissolves. A white precipitate will develop if sulfates are present. Wait 5 minutes.
5.
Mix tube again. Press the “30 Second Read” button and insert tube into colorimeter chamber. Record %T as soon as
reading stabilizes.
6.
Consult calibration chart to determine sulfate concentration in parts per million (ppm).
NOTE: If the sulfate concentration of the test sample is greater than 100 ppm, it is recommended that a dilution be
made with deionized water and the results multiplied by the dilution factor.
NOTE: A white film is deposited on the inside of test tubes as a result of the sulfate test. Thoroughly clean and rinse
test tubes after each test.
DC1600 SULFATE CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
4.04
4.30
4.56
4.83
5.09
5.36
5.63
5.90
6.17
6.45
80
6.72
7.00
7.28
7.56
7.84
8.12
8.41
8.70
8.99
9.28
70
9.58
9.88
10.18
10.48
10.79
11.10
11.41
11.72
12.04
12.37
60
12.70
13.03
13.36
13.71
14.05
14.40
14.76
15.12
15.49
15.87
50
16.25
16.64
17.04
17.44
17.86
18.28
18.72
19.16
19.62
20.09
40
20.57
21.06
21.57
22.10
22.64
23.21
23.79
24.39
25.02
25.67
30
26.35
27.05
27.79
28.56
29.38
30.23
31.12
32.07
33.07
34.13
20
35.26
36.46
37.74
39.11
40.58
42.17
43.88
45.75
47.77
49.99
10
52.43
55.12
58.10
61.43
65.18
69.41
74.25
79.81
86.29
93.92
0
103.05
82