Hitachi U-5100 Instruction Manual page 146

Ratio beam spectrophotometer
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3.2 Automatic Continuous Measurement (6-cell auto mode)
Setting Item
Data Int.
Set up a data interval. "Normal" and "Fine" are
selectable.
[1] Normal :
[2] Fine
Scan speed and data interval
Scan Speed
(nm/min)
Data interval according to measuring wavelength
range
Measuring wavelength
range (nm)
3.
Setting of Sample Conditions
(1) To set the sample conditions, press the <2> key
(Sample) and then [ENTER] key. Or select "Sample"
with the [▲] or [▼] key and press the [ENTER] key or
[►] key.
3 - 82
Description
Usually selected.
:
Permits measurement at short data
intervals as compared with Normal.
However, noise is more likely to be
generated on a spectrum, because the
data acquisition time per point is
shorter than when Normal is selected.
The actual data interval differs
depending on the scan speed and
measuring wavelength range.
Whichever is longer is made effective.
In case of scanning at 400 nm/min in a
range of 600 to 400 nm for example,
the data interval is set to 2 nm when
Normal is selected, and to 1 nm when
Fine is selected.
Data Sampling Interval (nm)
Normal
40
0.2
100
0.5
200
1
400
2
800
3
1200
5
2400
5
Data
interval (nm)
λ > 500
500 ≥ λ > 200
200 ≥ λ > 100
100 ≥ λ
(cont'd)
Fine
0.1
0.2
0.5
1
2
3
5
1.0
0.5
0.2
0.1

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