TM 5-4220-211-12&P
h.
Charge the SCUBA cylinders to the proper pressure as observed on the pressure gauge (Figure 3-5).
NOTE
Monitor the unit at all times during the filling procedure.
i.
Close the SCUBA shutoff valve (2, Fig. 1-4) and filling valve (Fig. 3-5).
NOTE
Before use, the reserve valve knob (3, Fig. 1-4) should be in the "up" position.
NOTE
During the filling procedure the SCUBA cylinders will warm up and then cool down after
being detached from the compressor. The cylinders will then need topping-off to the
required nominal filling pressure. However, this tedious procedure can be avoided by
using a water tank for submerging the SCUBA cylinders while filling them.
3-7.
DIVER TANK BLOCK This technical manual does not cover diving procedures or techniques. The appropriate
publication covering diving operations and procedures is FM 20-11-1, Military Diving Manual, Volume One. It should be
remembered, however, that upon starting a dive the reserve valve knob (3, Fig. 1-4) should be in the "up" position, and to
release the reserve supply to the diver, the reserve rod must be actuated.
NOTE
Do not completely drain a cylinder tank of air. Residual pressure will prevent moisture from
entering the tank.
3-8.
DETECTOR KIT.
a.
Select the test tube of the gas to be measured. (Ref. Table 1-4).
b.
Break off both tips of the test tube and fit in on the gas detector pump (1, Fig. 1-5).
c.
Select the air to be tested, i.e., compressor air intake or compressor discharge air.
d. Make the prescribed number of strokes (Table 1-4) and read the length of discoloration on the graduated
tube scale.
e. The numerical value read off is the measure of the concentration of gas (e.g., ppm) and should be compared
to Table 1-1 for acceptability.
Change 3 3-7/(3-8 blank)