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CHS-500
Carbon / Hydrogen / Sulfur Determinator |
 Carbon/Sulfur
models
CS-530,
CS-800,
CS-2000
Surface
Carbon model
SC-800
Oxygen/Nitrogen
models
ON-900,
ONH-2000
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| Overview |
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The CHS-500 incorporates the latest technology. It is
designed for the rapid simultaneous determination of
carbon, hydrogen and sulfur in materials such as coal,
coke, ores, minerals, slags, etc.
The CHS-500 is equipped with three 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 each C, H
and S. The CHS-500 features a microcontroller, a high
temperature resistance furnace up to 1550°C and
solid state infrared detectors with auto zero and auto
range control. Separate cabinets eliminate any influence
of temperature between the furnace and the analytical
unit. The modular design makes servicing much easier
compared to single cabinet analyzers. The combustion
gases coming from the furnace pass through the Hydrogen
cell first and then through a moisture absorber. The
dried water-free gases then pass through the CO2 and
SO2 cells. As there is no moisture present in the CO2
and SO2 cells, there cannot be any influence from the
hydrogen present on the carbon and sulfur results. |
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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 pressing a key the
sample weight is transferred into the PC. If required the
sample weight can also be entered manually. The boat with
the sample is placed on the furnace entrance. The start key
is pressed and the analysis cycle begins. The sample is pushed
into the furnace. At the end of the cycle, the analysis results
appear on the PC screen. |
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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 CHS-500 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 CHS-500 is equipped
with three independent infrared cells for C, H and S
determination
The lengths of the cells can be individually optimized,
to obtain maximum precision for the target analysis
levels of each customer.
The Hydrogen infrared cell is heated at a temperature remarkably higher than 100 ° in order to avoid moisture condensation. |
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| Solid
gold infrared path |
The
CHS-500 is a high quality product, furnished with infrared
paths made from solid gold. These tubes will allow cleaning
without loss of performance and sensitivity. It is not possible
to effectively clean metal and glass tubes that have been
gold-plated. These platings are typically only a few microns
thick, thus requiring the replacement of the tubes when they
are contaminated. |
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| Resistance
furnace up to 1550°C |
The
resistance furnace employs Silicon carbide heating elements.
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 10 to 15 minutes
to reach operating temperature. |
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| Combustion
efficiency |
The
design of the resistance furnace boat stop ensures oxygen
carrier gas penetrates into the crucible, ensuring efficient
combustion. This design eliminates the need for fragile
lances and honeycomb boat stops which tend to block
easily with ash. Additionally the boat stop protects
the combustion tube from the aggressive combustion products,
thus extending the life of the tube. The combustion
tube is a simple straight ceramic tube that is robust
and inexpensive to replace. The life expectancy of the
tube is measured in thousands of analyses and not hundreds
as is the case with other analysers. (Protected by German
utility model) |
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A
variety of combustion boats can be used in the furnace,
including the reusable ceramic boats (L=57 mm, W=22mm,
H=13 mm). Porcelain or quartz boats are also an
option. |
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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:
CHS-500 Specifications |
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