Hitachi CHROMASTER 5160, Instruction Manual

Page: 457 / 1022

2.3.5 Features of light source
The light source thermally dissociates ozone via the heat
generated by the xenon lamp itself. This allows the use of a
quartz-bulb xenon lamp that produces intense radiation even in
the short wavelength region.
As a safety measure against failure or stoppage of the cooling
fan, a thermal sensor works to extinguish the xenon lamp in
about 15 minutes if the fan stops during analysis at a room
temperature of 27
°
C, or in about 20 minutes if the fan was
stopped from the beginning, in order to prevent failure or damage
of the instrument.
2.4 Specifications
(1) Optical
system:
Ratio photometry;
intensity of transmitted beam is monitored.
(2) Light
source:
Xe lamp (150 W)
Hg lamp (for checking wavelength)
(3) Excitation wavelength range: 200 to 850 nm/Zero order
(4) Emission wavelength range:
250 to 900 nm/Zero order
Photomultiplier must be changed at emission wavelength
greater than 731 nm.
(5) Spectral bandwidth on excitation side: 15 nm
(6) Spectral bandwidth on emission side: 15 nm, 30 nm (variable)
With this instrument, spectrum bandwidth is defined by half-
value width. Therefore, in order to separate a spectrum
completely, a wavelength interval of 30 nm or more is
required.
(7) Wavelength setting: By communication (e-line) or keyboard
(8) Wavelength
accuracy:
±
3 nm
(9) Wavelength
repeatability:
±
0.5 nm
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