MIL-D-537F
TABLE II. Characteristics of type II disks.
Class
Range
Residual chlorine values in ppm
0.1, 0.3, 0.5, 0.75, 1.0, 1.5, 2.0, 3.0, and 5.0
0.1 to 5.0
1
3.0, 3.5, 4.0, 4.5, 5.0, 6.0, 7.5, 8.0, and 10.0
3.0 to 10.0
2
0.1, 0.15, 0.2, 0.35, 0.5, 0.75, 1.0, 1.4, and
0.1 to 2.0
3
2.0
0.1 to 10.0
4
0.1, 0.15, 0.25, 0.5, 1.0, 1.5, 2.5, 5.0, and
10.0
0.1 to 10.0
*5
0.1, 0.4, 0.7, 1.0, 1.5, 2.0, 3.0, 5.0, and 10.0
0.5 to 250
6
0.1 to 10.0
0.5, 15, 25, 50, 75, 100, 150, 200, and 250
**7
0.1, 0.4, 0.7, 1.0, 1.5, 2.0, 3.0, 5.0, and 10.0
* Shall match master color standard.
** Shall be a DPD disk which determines free chlorine.
7
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