35
Trouble symptom
Possible cause
Corrective action
1.Baseline correction is set to
“Off”.
1.Check
if
baseline
correction is set to
“Off”. Set it to “On” if set
to “Off”.
2.Poor adjustment of light
source mirror.
2.Re-adjust the mirror
referring
to
Section
4.5.2.2
or
Section
4.5.2.3.
When
the
light
source is changed
over from WI to D
2
,
the step height on
the baseline is more
than 1%.
3.Sample
chamber
not
securely fitted. The beam
may be incident upon the cell
holder.
3.Set
the
sample
chamber in the correct
position.
The performance at
wavelengths shorter
than 320 nm is not
stabilized.
D
2
lamp is “Off”.
Set the D
2
lamp to “On”
(Refer to the Operations
manual.)
The performance at
wavelengths longer
than 400 nm is not
stabilized.
WI lamp is “Off”.
Set the WI lamp “On”.
(Refer to the Operations
manual.)
1.Light is not correctly incident
upon the center of the
entrance slit.
1.Check
if
light
is
correctly incident upon
the
center
of
the
entrance slit. If not,
adjust the light source
mirror.
(Refer
to
Section
4.5.2.2
or
Section 4.5.2.3.)
2.Spectral bandwidth is too
small.
2.Increase the spectral
bandwidth.
3.The
absorption
of
the
solvent
placed
on
the
reference beam side is too
high.
3.Replace the solvent
with a suitable one.
Noise is high.
4.Lamp deteriorated.
4.Replace the lamp with
a new one. (Refer to
Section 4.5.2.)
