ELTRA CS-2000, Руководство пользователя

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Analysis
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5.6.2.4 Graphite analysis
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Analyzers with a range of 100% C can be calibrated with graphite.
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Any furnace temperature over 1000 °C is sufficient.
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Sample weight approx. 400 mg.
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The boat is pushed directly into the hot zone up to the boat stop.
5.6.2.5 Calcium carbonate analysis
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This material can be used for calibration in the range of 12% C.
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Depending on the sensitivity of the IR-cell, the weight can be between 100mg and
500mg.
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Any furnace temperature over 800 °C is sufficient.
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The sample is directly pushed up to the boat stop.
5.6.2.6 Limestone analysis
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Furnace temperature 1250 °C or higher.
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Calibrate with calcium carbonate (12% C).
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The usual sample weight is 500mg.
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Push directly into the hot zone up to the boat stop.
5.6.2.7 Cement analysis
If only carbon determination is required, deactivate the sulfur range.
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The sample weight is between 200mg and 500mg, depending on the C-concentration and
on the sensitivity of the IR-cell. Adjust the furnace temperature at 1250 °C.
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Enter the sample directly into the hot zone up to the boat stop.
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For sulfur analysis in cement we recommend to use the induction furnace.
5.6.2.8 Gypsum and desulfurization products (from power plants) analysis
Carbon determination
For carbon determination only, deactivate the sulfur range(s).
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Adjust the furnace temperature to 1250 °C.
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Take 300 to 1000mg sample weight, depending on the C content and the sensitivity of
the IR-cell. Enter the boat directly up to the boat stop.
Sulfur determination
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Take nitrogen as carrier gas (instead of oxygen).
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Adjust the furnace temperature at 1450 °C.
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Take 30 to 50mg sample weight. Add 500mg iron phosphate.
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Enter the sample directly into the hot zone up to the boat stop. The calibration can be
done with pure gypsum 18,6 % S.
Wood analysis
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Use the big ceramic boats (58 x 22 x 14 mm).
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Adjust the furnace temperature to 1300 °C.
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Take 350 mg of sample.
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Set the minimum analysis time to 50 s.
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Set the comparator level to 20mV.
5.6.2.9 Low Carbon Analysis
The IR-path of the low carbon range is usually 100mm. The maximum possible length is
320mm. Even though with 100mm IR-path a sample of 50ppm can give reasonable results and
good carbon peaks. This shows that the CS-2000 is capable to analyze even much lower
carbon values when the path length is 15 times longer! Please note that it is not a problem to