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TM-5-6640-213-14 Laboratory Air Mobile Aviation Fuel NSN
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Interpreting test results
TM 5-6640-213-14
2.
Exposing the sample pad.
(a) Open the detector pad holder and remove
a 25-mm detector pad from its sealed envelope with tweezers.
(b) Press the pad into the recess of the
outlet half of the sample holder housing with yellow side exposed.
(c) Reassemble the detector pad holder by
screwing both halves together firmly by hand.
(d) Reconnect the assembly at the quick-
disconnect coupler.  Open the toggle valve and allow 500 ml of test
fluid to. pass through the detector pad.
NOTE
A 500 ml test is necessary for accurate results in
the range of 1 to 10 ppm of water.  A 100 ml test
is suitable for determination of water content up
to 13 to 60 ppm.
(e) Close the toggle valve and remove the
entire assembly by actuating the quick-disconnect coupler.
3.
Reading test results.
A pad must never be dried in air because it will
pick up moisture from the air.  A desiccator must
be used if the pads are to be dried.  Fuel damp
means; a detector pad that has been pressed between
paper towels as described in (b) below.
(a) Open the detector pad holder and remove
the detector pad with tweezers.  The point of the tweezers can be
inserted under the pad through the notch in the rim of the recess.
(b) Press the detector pad between dry
paper towels to remove excess fluid.  Press firmly (about 5 lb) three
or four times with heel of the hand, moving the pad with tweezers to
a dry spot each time.
(c) Place the fuel-damp test pad under the
flap on the bottom of the unit with the yellow side facing inward.
(d) Mount the meter assembly on the side of
the unit-by sliding it into the tracks provided.  Turn on the Aqua-
Glo lamp by following the directions on the battery cover.
NOTE
Never leave the light on except while a reading is
being taken; the battery will provide only 1 hour of
light, and it takes 14 to 16 hours to recharge it.
2-31

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