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Serial number
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Project
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Required
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remarks
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1
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Principle and application
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The oxygen nitrogen and hydrogen in metal and non-metallic solid materials are detected by inert gas melting principle. In the determination of oxygen nitrogen and hydrogen, the weighed sample is placed in a graphite crucible and melted by heating in helium gas (argon gas can be used for single oxygen measurement) airflow at high temperature. The oxygen in the sample reacts with the carbon in the graphite crucible to form carbon monoxide (CO), and the nitrogen in the sample escapes in the form of nitrogen gas. These mixtures are sent to the converter by helium gas. Carbon monoxide (CO) is converted to carbon dioxide (CO2), and nitrogen does not react. After passing through the converter, the gas mixture is sent to the infrared detection cell, where carbon dioxide (CO2) (H2O) is detected. Then, after the carbon dioxide (CO2) and water in the infra-red gas mixture are adsorbed, the remaining nitrogen and helium gas mixture is detected through the thermal conductivity detection cell. Rapid and accurate determination of oxygen, nitrogen and hydrogen content in steel, cast iron, alloys, copper, zirconium, titanium, rare earth materials and other inorganic materials.
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2
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Scope of analysis
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Oxygen: 0.00001% ~ 20%(extensible measurement range)
Nitrogen: 0.00001% ~ 20%(extensible measurement range)
Hydrogen: 0.00001% ~ 0.15% (extensible measurement range)
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3
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Accuracy of analysis
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Oxygen and nitrogen: 1ppm or RSD≤1%
Hydrogen: 0.2ppm or RSD≤2%
Note: Subject to no greater than the
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4
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sensitivity
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0.01ppm
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5
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Time of analysis
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Usually 3 minutes
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6
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Detection system
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Non-dispersive infrared detection system was used for oxygen analysis. Nitrogen analysis using high-precision thermal conductivity detection system; Non-dispersive infrared detection system was used for hydrogen analysis.
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7
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Infrared detection system
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1, standard configuration oxygen, hydrogen analyzer equipped with independent infrared absorption cell, according to user requirements can be flexibly configured absorption cell length and the number of channels;
2, detector: pyroelectric solid-state infrared detector, and high-precision A/D sampling card, so that the whole machine has a high detection sensitivity, can effectively detect ppm level oxygen content;
3. Motor: the modulation system adopts high-precision stepper motor controlled by single-chip microcomputer to achieve long-term stability of modulation frequency;
4, light source: infrared light source selection of high efficiency, long life precious metal micro infrared luminator and gold plated metal mirror;
5. Constant temperature: the whole gas chamber is controlled by constant temperature to ensure the constant temperature and measurement accuracy. The temperature compensation semiconductor detector is adopted to ensure that the instrument is very small and the baseline is stable.
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8
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High precision thermal conductivity detection system
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Using high sensitivity thermal conductivity detection cell, cell current continuously adjustable, high precision amplifier and 24 bit A/D sampling card and other hardware to ensure the determination of nitrogen content from ultra-low to large range. Using low drift, high precision, large range, high sensitivity thermal conductivity detector low failure rate, strong reliability, good stability.
Imported high precision constant temperature control system, thermal conductivity temperature control within 0.3℃.
The reference gas path adopts the microflow control with good stability.
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9
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Weighing of samples
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0.01-1g, the weighing amount can be changed according to the sample content
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10
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Pulse furnace
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1, current 0 ~ 1500A, power: 10KVA, the highest temperature is higher than 3500℃.
2, pulse electrode furnace heating temperature is high, the use of program control power, can provide constant power heating, slope heating, subsection heating and other program heating methods, improve the analysis accuracy. It is suitable for rapid analysis of low melting point materials such as aluminum alloy to high melting point materials such as tungsten alloy. The electrode is suitable for various types of crucible, according to the release of different samples, can choose a variety of crucible including set crucible, high temperature crucible, effectively reduce the user's use cost. The electrode cooling system adopts a single circulation independent cooling system, which can be directly connected with external circulating water or external water cooling device, with good cooling effect and high reliability.
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11
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Air path
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1, the integrated design of the whole machine, the space is open, the connection route of the air system is greatly reduced, the whole air system is more simple and reliable. Air circuit components including solenoid valve, cylinder, air circuit pipe, air circuit joint are all imported components, solenoid valve life of more than one million times. The unique lifting system dual-axis guiding cylinder ensures the smooth lifting and lowering of the electrode, ensures the good contact between the graphite crucible and the upper electrode, and ensures the uniform force of the graphite crucible, which is conducive to long-term high temperature heating. Automatic blanking furnace head with air curtain protection, automatic air purging mechanism, effectively guarantee the analysis accuracy of oxygen and nitrogen elements. The furnace head is split structure, easy to disassemble and replace the upper and lower electricity, and the lower electrode is made of high temperature alloy material, long service life, low cost.
2, the design of the injection system is open, its advantage is that pollutants are discharged from the top of the furnace, do not enter the system, easy to operate. The micro-flow sensor is used to achieve high precision flow control, and the influence of the analysis airflow change on the analysis is minimized.
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12
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Power gas
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Nitrogen or compressed air without water and oil
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13
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Correction of
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1. Single point correction: calibration with one analysis result
2. Multi-point correction: correction with multiple analysis results
3. Blank cor
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14
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Power supply
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1, pulse furnace power supply: 220VAC 10%, 501Hz, maximum current 50A.
2. Other power supply: 220VAC 10%, 501Hz, maximum current 10A.
3, circulating water power supply: 220VAC 10%, 501Hz, maximum current 16A.
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15
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Function of software
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1. Provide software under Windows environment to quickly display analysis results and analysis curves;
2. Automatic storage of analysis results;
3. Sample weight is automatically input into the software;
4. Channel setting is optional;
5, dynamic release curve drawing and storage, unloading;
6. Various correction modes of analysis results, which can be manually corrected or corrected through analysis results; Can be single point correction, can also be multi-point correction;
7. Screen the data, calculate the average value, standard deviation, relative deviation, etc.
8, the new software can be according to the user application, can design a number of calibration lines, greatly convenient for users to use;
9, the host can and computer, printer, electronic day equal connection to achieve data transmission;
10. The analysis time and blank value can be adjusted, and the blank value of the melting aid can be automatically removed;
11. Users can store several analytical methods for different analytical samples.
12, can store a lot of sample weight (quantity is limited by the computer hard disk capacity).
13, can output normal format result report.
14, can be connected with the user database, realize the remote transmission of analysis results, easy to realize the network management of analysis results.
15, can be quickly instrument blank determination.
16. Sample number can be stored and edited.
17, can be applied to automatic sample injection, to achieve automatic operation of the instrument.
18, oxygen nitrogen and hydrogen can be set arbitrarily high and low analysis channel, to meet the analysis requirements of different content of different materials. Users can combine them freely according to their actual needs.
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আপনার বার্তাটি 20-3,000 টির মধ্যে হতে হবে!
Bengali
