8
Set
Position
Set
Position:
To
change
the
cuvette
position,
use
the
up
and
down
arrows
to
choose
the
desired
Target
position
and
press
SET
.
The
controller
will
move
the
cuvette
holder
to
the
selected
cuvette
position,
reflected
by
the
value
of
Current
.
When
the
cuvette
holder
is
powered
on,
the
device
homes
to
a
starting
point
before
seeking
the
targeted
cuvette
position.
To
manually
home
the
device,
push
and
hold
the
SET
button
for
three
seconds.
This
will
home
the
cuvette
holder
before
moving
the
device
to
the
targeted
position.
3.
FEATURES
OF
THE
TURRET
6
A.
GENERAL
DESCRIPTION
The
Turret
6
has
a
rotating,
temperature
‐
controlled,
cuvette
tower
which
holds
up
to
six
cuvettes.
The
center
of
the
tower
is
hollow,
permitting
light
to
pass
into
the
entrance
hole,
through
the
tower,
through
a
cuvette
and
exit
the
opposite
side
from
the
entrance.
A
plastic
cover
encloses
the
cuvette
tower,
providing
thermal
insulation.
A
floor
is
attached
to
the
bottom
of
the
cuvette
tower,
and
the
rotating
body
of
the
holder
contains
a
Peltier
element
sandwiched
between
this
floor
and
a
brass
heat
exchanger.
Water
is
put
through
the
heat
exchanger
to
draw
off
heat
generated
when
the
temperate
is
lowered.
Figure
1.
Turret
6
A
miniature
stepping
motor
is
placed
under
each
cuvette
to
drive
rotating
magnet
and
these
six
motors
rotate
with
the
Turret
body.
Dry
gas
may
be
directed
next
to
the
cuvette
windows,
both
on
the
inside
and
the
outside
surfaces,
to
minimize
condensation
when
working
below
the
dew
point
Set Position
Target = 5
Current = 1
