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CS-800
Carbon
/ Sulfur Determinator |
 Carbon/Sulfur
models
CS-530,
CS-2000
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| Overview |
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The CS-800 incorporates the latest in combustion technology.
It is designed for the rapid simultaneous determination
of carbon and sulfur in steel, cast iron, copper, alloys,
ores, cement, ceramics, carbides, minerals, sand, glass,
etc.
The CS-800 can be supplied with up to four independent
infrared cells. The respective cells with the appropriate
path length and sensitivity can be individually selected
to offer optimum precision for the analysis of high
and low levels of both sulfur and carbon.
The CS-800 features a microcontroller, an induction
furnace and solid state infrared detectors with auto
zero and auto range control.
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| Operating technique |
Samples
are accurately weighed in the ceramic crucible on the interfaced
electronic balance. By pressing a key, the sample weight is
automatically transferred to the PC. If required, sample weights
can also be entered manually. By pressing the start key the
analysis cycle begins and the sample enters the furnace. Depending
on sample weight and material analyzed, typical analysis time
is 50 seconds. During the analysis cycle instructions are
displayed to ensure easy and reliable performance. The CS-800
requires minimal maintenance requirements for which access
is simple. |
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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 CS-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 CS-800 can be
equipped with up to four independent infrared cells.
The lengths of all four 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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| 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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| Preheating crucibles |
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The
ceramic crucibles for the induction furnace can be preheated
in the high temperature furnace HTF-540. The preheating
reduces the blank value of the crucibles. This is important
for analysis in the very low ppm range. The crucibles
are inserted into the furnace tube and they remain preheated
in the tube until needed. Each time a crucible is needed,
a new one is inserted into the tube, and a preheated
crucible falls out the other end of the furnace tube.
The recommended preheating temperature is between 1250°C
and 1350°C. |
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| Auto
loader |
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The CS-800 can be supplied with an automatic sample
loading system. This loading system may also be retrofitted
at a later date.
• Unlike many other auto loaders the ELTRA system can accomodate 130 samples giving hours of unattended operation. On request, the loader can be delivered for more crucibles.
• The auto loader, which does not occupy any additional bench space, is mounted above the area where the balance, PC, monitor and consumables are normally situated.
• The crucible positions in the loader are easily accesible to the operator even from a sitting position.
• Three available models for 130, 104 and 36 crucibles.
• Dispensers for accelerators are available. Depending
on the applications, up to two dispensers can be attached
to the analyser, for example, one for tungsten and one
for iron accelerator. The dispensers are controlled
by the loader software.
• Additional samples can be added whilst the system is running and the “out of the sequence” feature will allow urgent samples to be analysed immediately.
• All existing ELTRA induction analysers can be retrofitted with this loader, regardless their age.
• Absolutely reliable.
• Reasonably priced.
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| Automatic
induction furnace cleaning |
Users of carbon and sulfur analyzers with induction
furnaces know that dust accumulates during combustion
and forms deposits (mainly of iron and tungsten oxides)
in the combustion chamber.
The CS-800 furnace is cleaned automatically after each
analysis, thus ensuring repeatable and accurate results
without the time consuming and unpleasant task of manual
furnace cleaning.
The standard cleaning apparatus is mechanically attached
to the furnace open/close system, thus ensuring it is
not possible for the cleaning brush to collide with
a hot crucible.
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| The
cleaning brushes won't burn! |
The efficient design of the cleaning mechanism rules
out any possibility of the cleaning brush catching fire.
To confirm this fact, ELTRA offers free replacement
of each burned cleaning brush, during the entire working
life of the analyzer.
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The
induction furnace and the autoloader use standard ceramic
crucibles, which are 1” or 25 mm in diameter. |
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| Up
to 20 grams of copper sample without accelerators |
The
unique design of the induction furnace combined with intelligent
power control electronics enables the analysis of copper samples
up to a weight of 20 grams without the need of any accelerators.
This is very important in case of samples with extremely low
C and S contents, like copper and copper alloys. The higher
the weight, the higher the amount of C and S present. The
elimination of the need for an accelerator is a breakthrough
in the analysis of very low C and S. The use of accelerators
can badly affect the results when the very low C and S in
the sample is similar to the C and S content of the accelerators
(blanks). The CS-800 eliminates this problem. |
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| Carrier
gas conservation |
If an analysis has not been carried our for a period oft time,
the analyzer will automatically switch to "gas conservation
mode.” This effectively means the carrier gas flow rate is
reduced to a minimum, only allowing a small amount of oxygen
to circulate through the IR cells, etc. The period of time
before the gas conservation is activated, can be modified
via the PC software. It is also possible to have carrier gas
flow only during combustion. As soon as the next sample is
analyzed, the carrier gas returns to normal flow rate. |
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| Compliance |
The CS-800 complies to the specifications of the standards:
ISO-9556,
ISO-4935, ISO - 10694
ASTM
E-1019, E-1587, E-1915-97
UOP-703-98 |
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Next:
CS-800 Specifications |
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