4.3
4.3 Check
Check of
of Specified
Specified Performance
Performance
4 - 4
4 - 4
Check the spectrum band width in
Check the spectrum band width in the following procedure.
the following procedure.
(1)
(1) Utilize
Utilize the
the spectrum
spectrum acquired
acquired in
in 4.3.1.
4.3.1.
(2)
(2) Determine
Determine the
the wavelength
wavelength width
width (half
(half value
value width)
width) of th
of the
e
acquired spectrum at the portion where the
acquired spectrum at the portion where the peak height is
peak height is
1/2 of
1/2 of the max
the maximum h
imum height.
eight. If the
If the width i
width is in
s in a range
a range of
of
1.0 to
1.0 to 1.5 nm
1.5 nm for the
for the Model
Model U-2810,
U-2810, it is
it is normal.
normal. If the
If the
width is out of the range, then execute wavelength
width is out of the range, then execute wavelength
calibration and retry measurement for check.
calibration and retry measurement for check.
Fig.
Fig. 4-1
4-1 Check
Check of
of Spectrum
Spectrum Band
Band Width
Width
(3)
(3) If the
If the specified
specified performance
performance is
is not o
not obtained,
btained, contact
contact Hitachi
Hitachi
High-Techno
High-Technologies Corporation service
logies Corporation service office.
office.
The baseline flatness includes baseline drift and noise.
The baseline flatness includes baseline drift and noise.
Before checking the baseline flatness, warm up the
Before checking the baseline flatness, warm up the instrument
instrument
sufficiently (for 2 hours or more after turning on power).
sufficiently (for 2 hours or more after turning on power).
(1)
(1) Open
Open the
the Analysis
Analysis Method
Method window
window by c
by clicking
licking the A
the Analysis
nalysis
Method command from the Edit menu.
Method command from the Edit menu.
(2)
(2) Select
Select “Wavelength
“Wavelength scan”
scan” in
in the M
the Measurement
easurement field
field on
on the
the
General tab page.
General tab page.
(3)
(3) Set the
Set the parameters
parameters on the
on the Instrument
Instrument tab p
tab page
age as sho
as shown i
wn in
n
Table 4-5.
Table 4-5.
4.3.2
4.3.2 Spectrum
Spectrum Band
Band
Width
Width
E
E
n
n
e
e
r
r
g
g
y
y
Half value width
Half value width
Wavelength
Wavelength
A
A
A
A
2
2
4.3.3 Baseline
4.3.3 Baseline
Flatness
Flatness
