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CW-800
CO2
/ H2O Determinator |
 Carbon/Sulfur
models
CS-530,
CS-2000
Surface
Carbon model
SC-800
Oxygen/Nitrogen
models
ON-900,
ONH-2000
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| Overview |
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The CW-800 incorporates the latest technology. It is
designed for the rapid simultaneous determination of
CO2 and H2O in materials such
as lime, cement, gypsum, ores, minerals, slags,
etc.
The CW-800 is equipped with two independent infrared
cells. The sensitivity of these cells can be customized
to meet specific requirements. The IR-absorption lengths
can be individually selected to offer optimum precision
for the analysis of high and low levels of both, CO2
and H2O. The CW-800 features a microcontroller,
a high temperature resistance furnace up to 1000°C
and solid state infrared detectors with auto zero and
auto range control. |
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| Analysis
procedure |
The
sample is weighed into a combustion boat on an electronic
balance which is interfaced to the PC. By pushing a key the
sample weight is transferred into the PC. If required, the
sample weight can also be entered manually. The start key
is pressed and the analysis cycle begins. The boat with the
sample is placed then on the holder of the sample loading
mechanism and entered into the furnace. The signals of the
CO2 and H2O detectors can be observed
on the PC-screen during analysis. At the end of the cycle,
the analysis results appear on the screen and the analysis
data is stored on the hard drive. |
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| PC
control with Windows 2000/XP software |
Comprehensive
analyser control and easy operation are provided by
the software running on PC, connected to the analyser.
Click software
from the main menu for more information about software.
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| Infrared
Cells |
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The
infrared cells of the CW-800 do not require any manual
zero adjustments. The zero and sensitivity adjustments
of the infrared cells are permanently and automatically
controlled by the electronics. The detectors utilize
solid state sensors combined with infrared filters.
The sensors are not gas filled, thus eliminating long
term problems due to gas leakage. The CW-800 is equipped
with two independent infrared cells for CO2
and H2O determination.
The lengths of the cells can be individually optimized,
to obtain maximum precision for the target analysis
levels of each customer. Each of the cells can be installed
with infrared absorption lengths ranging between 1mm
and 320mm. |
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| Resistance
Furnace up to 1000°C |
The
resistance furnace employs resistance wire as a heating element.
Full electronic control includes current limitation during
cold-start conditions to promote long element life. A separate
sensor is used to monitor ambient temperature and provide
data for automatic reference point compensation ensuring that
furnace temperature is not affected by fluctuations of ambient
temperature. The furnace requires approximately 20 to 25 minutes
to reach operating temperature. |
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| Combustion
boat insertion mechanism |
The
CW-800 is supplied with a combustion boat insertion
mechanism. The boat is placed on the tray of the mechanism.
At the start of the analysis the tray is mechnically
pushed into the hot zone of the furnace. On the completion
of the analysis the tray is mechanically removed and
rotated through 180° to remove the hot boat.
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| CO2
result unaffected by the water content |
The
gases coming from the furnace pass through the water cell
first and then through a moisture absorber. The dried water-free
gases then pass through the CO2 cell. As there is no moisture
present in the CO2 cell there cannot be any influence from
the water present in the sample. |
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| Electronic
Flow Controller |
An
essential part of the gas flow system is the electronic flow
controller. This provides a stable gas flow by eliminating
the known disadvantages of mechanical controllers. |
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Next:
CW-800 Specifications |
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