TM 5-6630-218-102.5.7 Taking a Samplea.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 rightangle to the base of the valve (vertical) (Figure 2.34).Figure 2.34 Three-Way Valve- TEST Positionb.Allow 500 milliliters (17.0 ounces) or less of fuel to pass through theassembly and free-water test pad. Record sample volume for reporting.c.When collection is completed, turn the three-way valve to the OFFposition before turning off the system pump.CAUTIONSome pumping systems (e.g. aircraft refuelers) develop a vacuum when closedwhich can cause backflow and rupture the monitor filter, rendering the testineffective.d.Retract the quick-release valve collar and remove the sampler nipplefrom the valve. Replace the protective cap and plug. See Figure 2.13.e.Disconnect the bypass hose from the side of the sampler andunscrew the sampler base. Hold the sampler in an upright position andremove the stainless steel monitor (Figure 2.35).2 - 3 7
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