...
Experimental
...
Background
...
The
...
deep
...
bucket
...
being
...
used
...
for
...
the
...
virtual
...
grit
...
chamber
...
in
...
the
...
float
...
height
...
versus
...
chemical
...
dosing
...
experiment
...
was
...
not
...
deep
...
enough
...
to
...
allow
...
testing
...
of
...
the
...
full
...
20cm
...
range
...
of
...
dosing
...
motion.
...
Experimental
...
Methods
...
To
...
test
...
the
...
full
...
range
...
of
...
motion
...
of
...
the
...
CD efficiently
...
the
...
experiment
...
was
...
modified
...
so
...
that
...
the
...
lever
...
arm
...
was
...
held
...
in
...
place
...
by
...
a
...
ringstand
...
and
...
clamp.
...
The
...
ringstand
...
was
...
marked
...
with
...
a
...
centimeter
...
scale
...
with
...
zero
...
being
...
marked
...
where
...
the
...
clamp
...
help
...
the
...
lever
...
arm
...
such
...
that
...
no
...
liquid
...
came
...
out
...
the
...
pressure
...
break
...
T,
...
but
...
any
...
lower
...
clamp
...
position
...
caused
...
flow
...
to
...
occur.
| Wiki Markup |
|---|
{float:right|border=2px solid black|width=480px} [!Laboratory Research Set-ups^Labeled ACD ringstand exp diagram x3.jpg|width=480px!|Laboratory Research Set-ups] {float} |
By
...
securing
...
the
...
lever
...
arm
...
at
...
precise
...
heights,
...
an
...
exact
...
float
...
height
...
could
...
be
...
simulated.
...
The
...
rest
...
of
...
the
...
experimental
...
method
...
remained
...
the
...
same
...
from
...
the
...
...
...
...
...
experiment.
...
Namely,
...
the
...
chemical
...
dosing tube was
...
positioned
...
at
...
5
...
cm
...
intervals
...
along
...
the
...
lever
...
arm
...
while
...
outflow
...
was
...
measured
...
by
...
the
...
pressure
...
sensor
...
in
...
the
...
base
...
of
...
the
...
collection
...
column.
...
Data
...
from
...
the
...
sensor
...
was
...
recorded
...
in
...
centimeters
...
of
...
water
...
by
...
using
...
the
...
Easy
...
Data
...
software.
...
The
...
lever
...
arm
...
was
...
positioned
...
at
...
heights
...
of
...
5
...
cm,
...
10
...
cm,
...
15
...
cm,
...
and
...
19
...
cm,
...
and
...
the
...
doser
...
was
...
positioned
...
at
...
a
...
distance
...
from
...
the
...
pivot
...
of
...
5
...
cm,
...
10
...
cm,
...
15
...
cm,
...
20
...
cm,
...
25
...
cm,
...
and
...
30
...
cm.
...
Data
...
was
...
collected
...
at
...
every
...
combination
...
of
...
those
...
parameters,
...
producing
...
24
...
flow
...
rate
...
data
...
points.
...
Results
The results for this experiment show data that is mostly consistent with theoretical projections. The data sets for each distance away from the pivot show a clear linear trend, with the slope increasing by a constant factor with each 5 cm increment of distance added. When projected leftward, the data all approaches the origin. The only unexpected data point is at (19, 1.777) in the 30 cm data set.
Similarly to data collected with the lab prototype and the robust CD with the float attached, the system appears to be less responsive when used farther away from the pivot. The graph below replaces data points with lines, which shows this trend more clearly. The lines of data further from the pivot (20 cm, 25 cm, 30 cm) are closer together than the lines representing data close in to the pivot (5 cm, 10 cm, 15 cm).
This inconsistency is relatively small, though, and indicates that the robust design of the CD may be capable of dosing relatively precise amounts of fluid.