Analysis
24
sensitivity of the infrared cell for free when the customer sends us samples before shipping the
analyzer.
5.1.1 Resistance furnace
The following describes the procedures for coal analysis.
Ensure the following before analyzing:
–
The temperature of the analyzer is stable (Power switch at least one to two hours on
position 1).
–
The moisture trap is checked and if necessary, the magnesium perchlorate is replaced.
See chapter
–
The incoming oxygen supply has a pressure of 2-4 bar (30 to 60 psi).
–
The mains switch is set to setting 2 for at least 10 to 15 minutes.
–
The furnace has reached its operating temperature. See chapter
–
The software is started on the connected PC. Please, refer to the “Help” function in the
software for all instructions concerned the operation of the software.
A combustion boat is then placed on the balance and, by pressing the TARE button, the weight
of the combustion boat is tared. Around 250 mg of coal sample are put into the combustion
boat.
Pressing the “F4-Balance” button or simply F4 on the keyboard of the PC, the weight is read
from the balance and appears in the “Weight-mg” field above. The transfer function is performed
regardless of how often the button is pressed. This enables a correction of any entered false
weight value.
The weight which is shown on the screen when the “F5-START” button is pressed, is the weight
which is used for calculation of the result for the running sample.
While the analysis is running, the weight of the next sample can already be transferred to the
PC. This way, work can be continued without loss of time.
If necessary, after a sample weight transfer, an accelerator can be added. With coal samples,
accelerators are normally not necessary. There are samples, however, that contain hard-to-burn
components. In such cases, about 500 mg FePO4 is recommended.
Remark
Only the sample weight must be read, under no circumstances the weight of the accelerator.
The combustion boat should be placed on the platform of the furnace. Then the
“F5-START” button is pressed. The word “ANALYSIS” will appear on the screen in the status-
window of the software indicating the beginning of the analysis cycle. Immediately thereafter,
the combustion boat is pushed into the hot area of the furnace. This is done with a metal rod.
The rod is pushed into the furnace far enough so that the combustion boat reaches the boat
stop. Afterwards, the rod is pulled out of the furnace.
The analysis then runs automatically, so that no more handling is necessary. The infrared cell
signals can be observed and followed on the PC screen.
In case of an overflow or when a new, unknown sample is to be analyzed, all ranges should be
reactivated. Refer to the “Help” function of the software.
At the end of the analysis, the measurement results appear on the screen and the indication
“ANALYSIS” disappears.
–
Any overloaded range is automatically deactivated during an analysis.
–
Any deactivated range is automatically reactivated after the end of analysis.
–
Only manually deactivated ranges remain inactive, until manually reactivated.
Remark
–
The sulfur range should be deactivated when only carbon is required. This will avoid
undue delay of the analysis caused by sulfur compounds which are difficult to burn, as it
is in case of cement analysis. Carbon burns normally quickly. Accelerators are also not
necessary.
Summary of Contents for CS-2000
Page 2: ...2 Copyright Copyright by Eltra GmbH Retsch Allee 1 5 42781 Haan Germany ...
Page 5: ...5 ...
Page 63: ...Maintenance 63 Fig 35 Induction furnace Cone ...
Page 80: ...Function description 80 Fig 51 Gas flow system ...
Page 91: ...Miscellaneous 91 8 1 6 Furnace Fig 60 Furnace 71031 71010 ...
Page 110: ...Copyright Copyright by Eltra GmbH Retsch Allee 1 5 42781 Haan Germany ...
