Design and function
SPECORD PLUS
12
4.2
Device configuration and function
SPECORD PLUS modules
The SPECORD PLUS consists of the following modules:
Module
Function
Radiation sources
The UV lamp (deuterium lamp) and the VIS lamp (halogen lamp)
generate the light that irradiates the sample after monochroma-
tization.
Upstream monochroma-
tor
(SPECORD 250 PLUS
only)
The upstream monochromator is a holographic grid moving syn-
chronously with the monochromator grid. By first dispersing the
light, the stray light is reduced.
Spectrometer system
The spectrometer system includes the monochromator which
disperses the light of the radiation sources. After this, the light
emitted from the monochromator is split into a measuring and a
comparison channel. The optics generate the beam cross-section
in the sample chamber. The spectrometer system is protected
against extraneous light and dust by its cover.
SPECORD 200/210/250
PLUS
sample chamber
The samples are measured in the sample chamber. The sample
chamber has two sample chamber rods to hold various accessory
units. The two adapter plates for the cell holders are attached to
the front sample chamber wall.
SPECORD 50 PLUS
sample chamber
Only the measuring beam path is directed through the sample
chamber. The accessories are mounted on the sample chamber
rods. The adapter plate for the cell holder is attached to the front
sample chamber wall.
Receiver circuit board
Two photodiodes serve as radiation receivers. The photodiodes
are Peltier-controlled on SPECORD 210/250 PLUS devices.
Power supply modules
The power supply modules provide the electrical voltage for the
electronics and the fans for the thermoelectric temperature con-
trol of the receivers in the SPECORD PLUS.
Device controller PC
The device controller coordinates the modules involved in the
measuring process.
Spectrometer system
