TM 10-4610-232-12
Paragraph e. DELETED
WARNING
The operator must check the product water regularly and change the pump settings as
needed to maintain the recommended residual. If the correct residual is not maintained
serious illness or death may occur.
f.
Hypochlorite Pump Adjustment. When storage tanks have at least 1 ft (0.3 m) of water, check chlorine level in product water
as follows:
(1)
Use available chlorine color comparator test kit (para. 2-9). Take water sample from dispensing nozzle. Allow water to
flow for 30 seconds before collecting sample.
(2)
Unless otherwise directed by the medical team or Surgeon General directive, the pump must be adjusted to provide
chlorination to the following standard:
Warm weather with water over 50°F (10°C): 2 ppm free chlorine.
Cold weather with water at or below 50F (10C): 2 ppm free chlorine.
Use the chlorine test result to calculate the proper pump setting as follows:
Test Results ..................................................................... 6 ppm
Required ........................................................................... 2 ppm
Current Pump Stroke.............................................................60
New Stroke Setting 2 6 = 0.33333 x 60 = 19.99999 or 20
g.
Polyelectrolyte Optimization. After the first hour of operation, if polyelectrolyte is being used, adjust polyelectrolyte, as soon as
other set-up tasks are complete.
CAUTION
It is essential that the amount of polyelectrolyte be optimized to provide the lowest turbidity
with the least amount of polyelectrolyte. Failure to carry out this procedure will result in
insufficient filtration and rapid accumulation of dirt on the RO elements. This dirt (fouling)
will decrease the amount of product water produced or will lead to early failure of the RO
elements, and failure to complete the assigned mission.
(1)
Set up and calibrate the portable turbidity meter.
Table 2-24. Polyelectrolyte Optimization Log Sample
Example: Polyelectrolyte Optimization: Initial setting 20 stroke 65 speed. Initial turbidity
3.5 at start of optimization. Final turbidity 1.4 after optimization. Best stroke setting in 65.
Change 12 2-85
