Figure 2-3.--Contaminated fuel detector (AEL Mk III).
on a level surface and the tubes are equally spaced to
You will use a centrifuge to test fuels and lubricating
maintain proper balance.
oils for bottom sediment and water (BS&W). The
centrifuge you use must be capable of holding at least
AEL Mk I/Mk II
two 100-milliliter pear-shaped tubes. The type of
centrifuge you will likely use is shown in figure 2-1.
The AEL Mk I/Mk II free water detector is shown
It is capable of holding four tubes at one time. It also
in figure 2-2. You will use this instrument to measure
has an adjustable speed control rheostat, which will
the amounts of free or mechanically suspended water
allow you to raise and maintain the rotational speed
in diesel fuels, naval distillate, and JP-5. To operate
between 1,400 to 1,500 rpm.
the unit safely, follow the precautions mentioned
earlier for the safe operation of electrically powered
To operate this unit safely, remember it is a
rotating piece of equipment. Always keep your hands
and all objects away from the unit while it is
AEL Mk III
operating. Never open the unit while it is operating.
Before you operate the centrifuge, always make
The AEL Mk III contaminated fuel detector is
certain the tubes are free from cracks and they are
shown in figure 2-3. It is the most extensively used
properly capped. Also, make sure the unit is sitting