16
APPENDIX
1.
TEMPERATURE
SPECIFICATIONS
FOR
THE
TURRET
6
Enoch
W.
Small
and
Louis
J.
Libertini
26
July
2013
Temperature
Range:
‐
15
°C
to
+
80
°C
The
TC
1
Temperature
Controller
can
set
temperatures
between
‐
40
°C
and
110
°C.
Under
normal
conditions,
as
used
inside
a
spectrophotometer,
the
turret
6
will
achieve
temperatures
in
the
range
of
‐
15
°C
and
80
°C
using
room
temperature
water
(~22
°C).
Somewhat
lower
temperatures
can
be
obtained
by
the
use
of
iced
water.
Temperatures
above
80
can
usually
be
attained
by
using
warm
water
(recommended).
In
some
cases
higher
temperatures
may
require
operation
without
coolant
flow,
but
special
procedures
are
required.
An
input
connection
for
purging
with
dry
gas
is
provided.
Temperature
Precision:
±
0.02
°C
Temperature
precision
is
the
average
deviation
from
the
set
temperature
of
temperature
readings
returned
from
the
temperature
‐
controlled
turret
6
for
set
temperatures
between
‐
15
°C
and
+
110
°C.
Thus,
it
is
a
measure
of
the
ability
of
the
cuvette
holder
to
hold
a
constant
temperature.
The
precision
of
the
temperature
actually
held
in
the
solution
should
be
even
better
than
the
precision
for
the
cuvette
holder.
Unfortunately,
we
have
no
current
means
of
measuring
it.
Table
1.
Average
deviation
from
the
set
temperature
vs
set
temperature
for
50
points.
Set
temperature
‐
15
0.0
20.0
40.0
60.0
80.0
100
110
Average
deviation
0.0046
0.064
0.002
0.0084
0.008
0.0066
0.0082
0.0116
Temperature
Accuracy:
±
0.25
°C
over
the
range
of
‐
20
°C
to
+
110
°C.
Temperature
Accuracy
indicates
how
well
the
TC
1
controller
display,
after
calibration,
compares
with
the
actual
temperature
of
the
sample
holder
measured
using
a
NIST
‐
traceable
RTD
temperature
probe
(probe
accuracy
±0.03
°C
from
‐
99.9
°C
to
+99.9
°C)
inserted
in
the
metal
block
of
the
cuvette
holder.
