TM 5-6630-218-10
2.5.7 Taking a Sample
a.
Hold the sampler in an upright (vertical) position, turn the three-
way valve to the TEST position: when the valve arm is positioned at a right
angle to the base of the valve (vertical) (Figure 2.34).
Figure 2.34 Three-Way Valve
- TEST Position
b.
Allow 500 milliliters (17.0 ounces) or less of fuel to pass through the
assembly and free-water test pad. Record sample volume for reporting.
c.
When collection is completed, turn the three-way valve to the OFF
position before turning off the system pump.
CAUTION
Some pumping systems (e.g. aircraft refuelers) develop a vacuum when closed
which can cause backflow and rupture the monitor filter, rendering the test
ineffective.
d.
Retract the quick-release valve collar and remove the sampler nipple
from the valve. Replace the protective cap and plug. See Figure 2.13.
e.
Disconnect the bypass hose from the side of the sampler and
unscrew the sampler base. Hold the sampler in an upright position and
remove the stainless steel monitor (Figure 2.35).
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