TM 10-4610-240-10
TM 08580C-10/1
T.O. 40W4-13-21
FIGURE 2-60. R. O. VESSELS
i. Examine Filtered Water for Clarity.
(1) From Storage Box No. 3, get the plastic
graduated cylinder (called turbidity tube) used for
checking clarity of water
(2) Bottom of turbidity tube has a white
bullseye set in a black background disc
(3) Go to left front side of ROWPU and
observe the seven drain valves
FIGURE 2-61. TURBIDITY TUBE
(4) Draw a sample of 600 milliliters of water from DRAIN NO. 1 CARTRIDGE FILTER into the turbidity tube.
(5) Look down into turbidity tube and you should be able to see both the white bullseye andblack disc at the
bottom of the tube clearly. If they can be seen clearly, proceed to step j.
(6) If both cannot be seen clearly, run the ROWPU another 10 minutes. Repeat steps (4) and (5).
FIGURE 2-62. DRAIN VALVES
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