The ONH5000-PRO oxygen nitrogen hydrogen analyzer developed by Focus Technology (Hangzhou) Co., Ltd. is a highly sensitive, high-precision, stable, and reliable analytical instrument with the ability to upgrade software and hardware in the future.

1. Overview of Oxygen Nitrogen Hydrogen Analyzer

The ONH5000-PRO oxygen nitrogen hydrogen analyzer uses an inert gas protected pulse electrode furnace to melt and decompose samples, and measures oxygen using infrared absorption method and nitrogen and hydrogen using thermal conductivity method. It can measure the content of oxygen, nitrogen, and hydrogen elements on one instrument.

The ONH5000-PRO oxygen nitrogen hydrogen analyzer is equipped with an inert gas protected pulse electrode furnace with a power of 8.0KW, and the furnace temperature can reach up to 3000 ℃ or above. The pulse electrode furnace adopts program-controlled heating, and can choose power control or current control heating control methods to achieve the best melting and decomposition of the sample. At the same time, helium or nitrogen gas in the inert gas is used as the carrier gas according to the required analysis elements. Samples of various metal and non-metal materials such as black metals, non-ferrous metals, ceramic materials, superconducting materials, semiconductor materials, etc. are subjected to high-temperature thermal decomposition. The oxygen in the sample reacts with carbon in the graphite crucible to generate carbon monoxide (CO), and nitrogen and hydrogen are respectively treated with nitrogen gas (N)₂）And hydrogen (H)₂）In the form of escaping, the carrier gas sends these mixed gases to the converter, where carbon monoxide (CO) is converted into carbon dioxide (CO)₂）After passing through the converter, the mixed gas is sent to an infrared detection system for detection, and then carbon dioxide (CO) is removed₂）Contains nitrogen gas (N₂）And hydrogen (H)₂）The mixed gas is sent to the thermal conductivity detector for detection. The infrared detection system and thermal conductivity detection system amplify and A/D convert the measured signals, and then process the data through a computer to calculate the content of oxygen, nitrogen, and hydrogen elements in the sample.

2. Application scope and main technical performance data of the instrument

2.1 Scope of application of the instrument:

The instrument is suitable for the determination of oxygen, nitrogen, and hydrogen content in non-metallic solid materials such as ferrous metals, non-ferrous metals, superconducting materials, semiconductor materials, rare earth materials, and ceramic materials.

2.2 Scope of Analysis:

Oxygen: 0.00001% to 3.0%

Nitrogen: 0.00001% to 3.0%

Hydrogen: 0.00001~0.25%

Expanding the analysis range by reducing sample weighing

Other analysis scopes are optional

2.3 Minimum reading:0.000001%

2.4 Instrument accuracy:

Oxygen: 0.0001% or RSD ≤ 1.0%

Nitrogen: 0.0001% or RSD ≤ 1.0%

Hydrogen: 0.00002% or RSD ≤ 2.0%

2.5 Analysis time:Usually 120-180 seconds, including flushing, analysis delay, and analysis time

2.6 Weighing accuracy of balance:0.0001g

2.7 Detector:

Oxygen: Solid state infrared sensor

Nitrogen: Thermal conductivity detector

Hydrogen: Thermal Conductivity Detector

2.8 Pulse Heating Furnace:

Power: ≤ 8KW

Current: ≤ 1500A

Temperature: ≤ 3500 ℃

2.9 Instrument size:W700xD770xH820mm

2.10 Instrument weight:About 190Kg

2.11Carrier gas:High purity nitrogen and helium with a purity of 99.999%, pressure ≥ 0.15MPa

2.12 Power gas:Ordinary nitrogen or purified compressed air, pressure ≥ 0.25MPa

3.ONH5000-PROOxygen nitrogen hydrogenanalyzerTechnical characteristics

3.1 Overall Structure

The ONH5000-PRO oxygen nitrogen hydrogen analyzer adopts an integrated and modular design, consisting of six independent hardware module units including pulse electrode furnace, detection system, gas circuit system, power supply system, circuit system, water circulation cooling system, etc., combined with a computer and electronic balance to form a complete analytical instrument. The instrument not only has extremely high stability and reliability, but also has powerful functions and simple operation, without special requirements for users, making it an ideal choice for analyzing oxygen, nitrogen, and hydrogen elements.

The upper computer of the instrument adopts Lenovo commercial desktop computer to control the whole machine, and the lower computer adopts 32-bit embedded ARM architecture microcomputer control. The 24 bit high-precision data acquisition system meets the requirements for control accuracy and speed.

Simultaneously equipped with the international brand Mettler Toledo one ten thousandth precision electronic balance, so as to make the instrument analysis accuracy at the advanced level of imported instruments.

3.2 Electrode Furnace System

The fully digital closed-loop control pulse electrode furnace can be operated in two modes: power control or current control. Regardless of the furnace control mode, it can achieve programmed temperature rise control. Multiple temperature rise methods such as constant temperature rise, slope temperature rise, and segmented temperature rise can be set according to the sample, resulting in higher precision temperature control and better melting and decomposition of the sample. Rapid analysis has been achieved from low melting point materials such as aluminum alloys to high melting point materials such as tungsten alloys.

The furnace head is a separate structure, with easy disassembly and maintenance of the upper and lower electrodes. The electrodes are suitable for various types of crucibles, and according to the release situation of different samples, multiple crucibles including sleeve crucibles, standard crucibles, and high-temperature crucibles can be selected to effectively reduce user costs.

The electrode cooling system adopts a single cycle independent cooling system, which can be directly connected to circulating water or external water cooling devices, and has the characteristics of good cooling effect and high reliability.

3.3 Gas path system

The analysis gas path and the power gas path are independent of each other, with a reasonable and concise layout.

The analysis of the pneumatic components, including solenoid valves, cylinders, pneumatic pipes, and pneumatic joints, all use imported components, and the lifespan of the solenoid valves exceeds tens of millions of times. The unique design of the guiding cylinder and dual axis guiding rod ensures smooth lifting and lowering of the electrode, ensuring good contact between the graphite crucible and the upper electrode, while also ensuring uniform force distribution of the graphite crucible, making it suitable for long-term high-temperature heating. The automatic feeding furnace head with air curtain protection and automatic blowing mechanism effectively ensure the accuracy of oxygen, nitrogen, and hydrogen element analysis.

Multi stage stable voltage and flow design, combined with high-precision thermal mass flow controller and small flow regulator and controller, ensure more stable pressure and flow of the analyzed gas, resulting in higher analysis accuracy of the instrument.

3.4 Circuit System

The instrument operation control circuit and data acquisition are both designed modularly, using a 32-bit Reduced Instruction Set (RISC) central processing unit architecture, namely ARM architecture (Advanced RISC Machine). The uClinux operating system runs internally in the circuit system, making the system run faster and more stable.

All circuit boards are mechanically welded, and professionally selected electronic components ensure the long-term stability and reliability of the circuit board.

The power supply adopts a solid-state power module from military products, which has short-circuit protection function, is resistant to current shock, dustproof, simple and reliable; The connection uses flat wire connectors to eliminate potential faults caused by poor contact, improving the reliability of the entire circuit and the connection reliability between lines. The data transmission lines and other circuits of the circuit system have professional anti-interference measures, effectively reducing the impact of electromagnetic interference.

3.5 Oxygen, nitrogenhydrogendetection system

3.5.1 Oxygen detection system

The oxygen detection system adopts infrared absorption method, and the core components of the infrared detection system, such as the infrared light source, use ultra long life precious metal platinum wire infrared light source. It does not oxidize or decay after long-term use, and does not require the use of N₂Blow and sweep. The infrared light source reflector, infrared detection chamber, and the focusing cone at the front end of the sensor are all thickened with gold plating to ensure their effectiveness and service life; The light source modulation system adopts a high-precision imported stepper motor controlled by a microcontroller, achieving long-term stability of modulation frequency. Combined with proprietary components such as narrowband filters and infrared sensors, high-precision preamplifiers, and A/D sampling data processing systems that are at the international advanced level, the whole machine has extremely high detection sensitivity. It can not only effectively detect ppm level ultra-low oxygen content, but also has an excellent range from low to high for oxygen content detection.

3.5.2 Nitrogen detection system

The nitrogen detection system adopts a highly sensitive and stable thermal conductivity detector, which has the characteristics of low drift, high accuracy, large range, and high sensitivity. In addition, the pool current of the thermal conductivity detector is continuously adjustable, ensuring that the instrument has extremely high sensitivity and linearity in the full range, and ensuring the accuracy of nitrogen measurement in a large range from ultra-low content to high content.

3.5.3 Hydrogen detection system

The hydrogen detection system adopts a highly sensitive and stable thermal conductivity detector, which has the characteristics of low drift, high accuracy, large range, and high sensitivity. In addition, the pool current of the thermal conductivity detector is continuously adjustable, ensuring that the instrument has extremely high sensitivity and linearity throughout the entire range, and ensuring the accuracy of hydrogen measurement from ultra-low content to high content in a large range.

4. Application software

Our proprietary analysis software, based on the Windows 7 operating system, is powerful and user-friendly. The software supports instrument operation and data processing to meet the needs of different users.

major function

User interface software with modern graphics

Multivariate regression calibration curve, real intensity versus concentration

User defined multi-level authorization management mode

• Supports batch weighing analysis and also supports priority sample analysis mode

• Unique analysis method mode, supporting user customization

Under each method, a unique furnace operating mode can be established for that method

Only need to establish an analysis method once, with the convenience of permanent use

Sample management supports the establishment of an unlimited sample library at once

• Call directly through sample retrieval without the need for repeated input

• Supports single point and multi-point calibration modes

Convenient and concise instrument self diagnostic function

• Support functions such as curve comparison, analysis result statistics, etc

• Support querying and analyzing results based on different conditions

The analysis results are automatically exported to experimental reports or Excel spreadsheets that support users' free editing based on their choices.

5. Linearization calibration

Linearization calibration technology is the core technology of instruments, and linearity is the ability of analytical instruments to obtain accurate results within a specific analysis range. Therefore, the level of linear calibration technology directly determines the level of accurate results obtained by the instrument.

Focusing technology instruments integrate the advantages of both domestic and foreign linear calibration technologies, with significant breakthroughs in calibration modes, algorithms, and software design, thus achieving excellent linearity over the full range. The unique full range linear calibration technology, combined with weight linear compensation, pressure, flow, temperature compensation, etc., ensures the analysis accuracy of unknown samples from low to high content within the full range, especially for quality control in the production process and unknown sample analysis in scientific research institutions.

6. Scope of Supply

Random standard attachment

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Spare parts list

List of spare parts (consumables)