ARL 3460 Metals Analyzer
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Technical Description
2
Primary slit:
20 µm
Secondary slit:
20, 25, 37.5, 50, 75, 100, 150
µm
Photomultiplier tubes:
28 mm, 10-stage side window tubes, fused quartz or glass envelope.
The phototubes are mounted outside the vacuum chamber in order to
avoid corona-discharge and for a better serviceability in case of line
addition.
Attenuators:
All attenuators are programmable for optimum phototube adjustment,
each attenuator has 41 steps
Grating:
The spectrometer is provided with the following grating, appropriately
selected for your analytical task: 1080 gr/mm ; 1667 gr/mm ; 2160
gr/mm.
Ruling
(lines/mm)
Order
Blase
(nm)
Range
(nm)
Inverse dispersion
(nm/mm)
1080
1st
2 nd
3 rd
4 th
600
300
200
150
400 - 820
230 - 400
170 - 230
130 - 205
0.93
0.47
0.31
0.23
1667
1st
2 nd
3 rd
347
173
116
220 - 528
160 - 260
130 - 176
0.60
0.30
0.20
2160
1st
200
170 - 407
0.47
Slit frame
Excitation
stand
spark source
Vacuum
region
Spectrometer
housing
Photomultiplier tubes
Primary
Ar flushed
entrance
optics
Grating
