FED-STD-228A
3.1.11 A cell of transparent fused quartz for exposing the actinometer solution to the radiation from the
arc of the design and dimensions shown on figure 4131B.
MACHLETT
14 mm.
71 mm.
1 mm.
wall thickness
75 mm.
FIGURE 4131B. Transparent fused quartz cell.
3.1.12 A holder for enclosing the cell except for the face which is exposed to the light being measured.
The exposed cross-sectional area of the cell shall be measured with an accuracy of at least ±1 percent.
The inside of the cell holder shall be completely covered with a dull, black enamel paint. The holder shall
be designed to take the place of a specimen holder and so constructed that the center of the cell
occupies the same relative horizontal position as the center of a rubber specimen.
3.1.13 Automatic dispensing burette, figure 4131C.
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