FINAL
TRIM
SIZE
:
7.5
in
x
9.0
in
Calibration
Overview
User
Calibrations
T
o
obtain
the
best
measurement
results
,
it
is
recommended
that
a
user
vertical
calibration
be
performed
after
every
10
hours
of
continuous
use
or
if
the
temperature
has
changed
by
greater
than
2
C
from
the
previous
vertical
calibration.
T
o
view
the
temperature
change
This
procedure
displays
the
temperature
change
that
the
instrument
has
undergone
since
the
last
Plug-in
V
ertical
Calibration.
1.
Press
the
front-panel
channel
4
SETUP
5
key
.
2.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Calibrate
and
then
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Cal
status
on
.
The
current
plug-in
1T
emp
value
is
listed
for
each
installed
module
.
T
o
perform
a
plug-in
module
vertical
calibration
No
additional
equipment
is
required
to
perform
a
plug-in
vertical
calibration.
Reference
signals
are
both
generated
and
routed
internally
.
1.
Remove
any
front-panel
connections
from
electrical
channels
.
2.
Press
4
Utilit
y
5 ,
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Calibrate.
.
.
,
and
then
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Calibrate
plug-in.
.
.
.
3.
Select
the
plug-in
module
to
be
calibrated,
press
NNNNNNNNNNNNNNNNNNNNNNN
1
and
2
or
NNNNNNNNNNNNNNNNNNNNNNN
3
and
4
.
4.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Start
cal
to
start
the
calibration.
5.
F
ollow
the
on-screen
instructions
.
Dark
Calibration
The
dark
calibration
is
for
electrical
measurements
if
an
external
O/E
is
being
used.
This
calibration
measures
the
optical
channel
oset
signal
when
there
isn't
any
light
present
and
then
uses
this
information
in
performing
extinction
ratio
measurements
.
Dark
calibrations
should
be
done
for
the
following
conditions:
Before
any
critical
extinction
ratio
measurements
are
made
After
a
plug-in
vertical
calibration
If
a
module
has
been
removed
If
the
mainframe
power
has
been
cycled
3-8
Содержание 54751A
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