8.2 Span
Adjustment
(3)
Change display ATTEN
so
that the vertical axis
of
the
chromatogram on the analysis screen becomes more than
100
pRru.
(Example)
When AUX
RANGE
setting is 2, set ATTEN
=
7.
(4)
Supply distilled water from the inlet port using the syringe
and adapter. Then, replace the reference flow line with
distilled water,
After both sample cell and reference cell
are
filled with
distilled water, close R. flow.
Press
ITest/..r.l
and
[El,
and wait until the baseline
is stabilized.
Adjust the
zero
position, and record the baseline when the
inside of
the
cell is filled with distilled water.
Inject
the
standard sample from the inlet port. The baseline
will move toward
+
direction about 100
mu.
When the baseline is stabilized, move the cursor to read the
difference between the levels of
the
distilled water and the
standard sample.
(10) When the refractive index of
the
standard sample
is
R
x
1
Od
RIU,
the span factor
is
calculated by the following equation:
(5)
(6)
(7)
(8)
(9)
[SPAN
-
A]) (new)
=
[SPAN
-
A] (old)
x
lOO/R
(Example)
When the measured refractive index is 102.4
x
10'
NU]
and the
old span factor
is
0.90,
the new span factor is
as
follows.
0.90
x
100/102.4
=
0.88
t
new SPAN
-
A
(1 1) Input the SPAN
-
A value in local mode.
Press
(fu..]
several
times and set LOCAL to
1.
Press the
(func)
key several
times and input the value obtained into SPAN
-
A.
After setting a the new value, set LOCAL to
0
again to
return to
the
remote mode.
(12)
Inject distilled water from the inlet port and complete the
span adjustment.
(13) As for the adjustment of modes
P
and
L,
change the mode
setting, and repeat procedures from
(4)
to (12). Input the
span value obtained in each mode into SPAN
-
P and
SPAN
-
L.
8
-
6
-
RID
-
1OA
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