Oxygen nitrogen hydrogen concentration analyzer

Oxygen nitrogen hydrogen concentration analyzertechnical indicators

working principle

Oxygen nitrogen hydrogen（ONH）ConcentrationAnalyzer for metal and non-metal solidsinorganicOxygen, nitrogen, and hydrogen in materials（ONH）Adopting the principle of inert gas meltingconductdetectionofIn the measurement, place the weighed sample in a graphite crucible and place it in helium gas (single oxygen measurement)And single hydrogen measurementHeating at high temperature in an argon gas stream is availableCombustion, oxygen in the sample（O）Reacting with carbon in graphite crucible, most of it oxidizes into carbon dioxide（CO2）There is also a small amount of carbon monoxide present（CO）Generation, hydrogen（H）Then use hydrogen gas（H2）The form is released and reacts with copper oxide to be oxidized into water（H2O）. Nitrogen（N）Using nitrogen gas（N2）The form has been released. After filtration, these analytical gases are transported through a carrier gas (helium) and passed through a converter to remove carbon monoxide that has not been fully oxidized（CO）Convert to carbon dioxide（CO2）Then enter the oxygen detection tank to detect oxygen（O）Quality score, water（H2O）It will also enter the water（H2O）Detecting hydrogen using an infrared cell（H）. Water（H2O）And carbon dioxide（CO2）The infrared energy has a precise wavelength in the spectral range, and this characteristic wavelength of infrared is absorbed by gas passing through the infrared cell, resulting in a decrease in the intensity of light energy and reflected as a decrease in the voltage output of the infrared cell. After integration, oxygen can be obtained（O）And hydrogen（H）The quality scores of two elements. Nitrogen（N）Detection through thermal conductivity cell, nitrogen gas（N２）Simultaneously entering the thermal conductivity pool with the reference gas helium, due to the difference in thermal conductivity coefficients (different heat carried away at the same flow rate) between the two gases, the resistance values at both ends of the bridge change, resulting in a change in the output voltage and the determination of the mass fraction of nitrogen.

1. Technical indicators

1.1 Scope of Analysis

Oxygen: 0.00001% to 40%;

Nitrogen: 0.00001% to 40%;

Hydrogen: 0.00001% to 0.2%;

Note: Calculated at 1g, changing the sample size can expand the measurement range.

1.2 Analysis accuracy

Oxygen and nitrogen: 1ppm or RSD ≤ 1%;

Hydrogen: 0.2ppm or RSD ≤ 2%;

Note: The standard deviation or uncertainty shall not exceed the sample standard deviation.

1.3 Analysis time

Usually about 3 minutes.

1.4 Sample weighing

0.01g~1g, the sample weight can be adjusted according to the sample content.

1.5 Detection System

Oxygen analysis adopts a non dispersive infrared detection system;

Nitrogen analysis adopts a high-precision thermal conductivity detection system;

Hydrogen analysis uses a non dispersive infrared detection system.

1.6 Correction:

1) Single point calibration;

2) Multi-point correction;

3) Blank correction.

2 . Equipment Explanation

2.1 Hardware Functions

1)Oxygen nitrogen hydrogen concentration analyzerIt can simultaneously measure oxygen, nitrogen, and hydrogen elements without the need for gas exchange for secondary analysis, making it efficient and fast;

2) Water cooled transformers and pulse furnaces have a maximum power of 10kW, with the advantages of small size, good heat dissipation effect, and stable power output;

3) The dual axis guided integrated cylinder ensures smooth lifting and lowering of the electrode, ensuring good contact between the graphite crucible and the upper and lower electrodes, while also ensuring uniform force on the graphite crucible, which is conducive to long-term high-temperature heating;

4) The whole machine adopts a modular and integrated design, with four independent modules including pulse electrode furnace, gas system, circuit system, and detection system integrated into one main unit, with a simple and elegant appearance;

5) The oxygen and hydrogen infrared analysis cell adopts high-precision constant temperature compensation technology, effectively improving the repeatability and reproducibility of sample analysis data;

6) The full range linear calibration technology, combined with weight linear compensation, pressure, flow rate, temperature compensation, etc., ensures the analysis accuracy of unknown samples from low to high content within the full range.

2.2 Software Functions

1) Provide software for Windows environment to quickly display analysis results and curves;

2) Automatic storage of analysis results;

3) The sample weight is automatically inputted into the software;

4) Channel settings are optional;

5) Drawing and storing dynamic release curves;

6) The analysis results can be corrected using three methods: manual correction, single point correction, and multi-point correction;

7) Filter the data and calculate its mean, standard deviation, relative standard deviation, etc;

8) Multiple calibration curves can be drawn according to user needs, making it convenient for users to use;

9) The host can be connected to computers, printers, electronic scales, etc. for real-time data transmission;

10) Users can store various analysis methods for different analysis samples;

11) Capable of outputting analysis reports;

12) The analysis results can be remotely transmitted and connected to the laboratory management system;

13) Can quickly perform instrument blank measurement.

3 . Configuration List

1) Analyzer host: one unit;

2) Cooling circulation system: one set;

3) Voltage stabilizing power supply: one unit;

4) Electronic balance: one unit;

5) Computer: one set;

6) Printer: one unit;

7) Random spare parts: one set;

8) Analysis software: one set;

9) User manual: one copy.

4 . Installation requirements

1) Power supply voltage: 220V ± 10%, 50 ± 2% Hz;

2) Grounding resistance:<5 Ω (requires separate grounding wire);

3) Environmental temperature: 18 ℃~29 ℃; Environmental humidity:<80% RH, one air conditioner is required to be installed in the operating room;

4) No high-frequency electromagnetic field, no strong vibration source;

5) Carrier gas: helium, purity 99.999%;

6) Power gas: nitrogen, ordinary nitrogen.

5 . Acceptance of instruments and equipment

1) Acceptance criteria

Analysis accuracy acceptance: Using standard samples, data statistics should be conducted based on the calibration certificate provided by the national standard, and the statistical results should meet the standard deviation of the national standard or the measurement value;

2) Acceptance sequence: The equipment shall be debugged before leaving the factory, and the final debugging and acceptance shall be carried out on site by the user;

3) Acceptance qualified: in accordance with the technical agreement, contract, current national laws and regulations confirmed by both parties, training as required, and providing materials as required.

6 . After sales service and technical training

1) Provide training to users, explaining the working principles and equipment construction;

2) Methods for diagnosing and handling equipment malfunctions;

3) Software application and parameter settings;

4) Warranty period: 15 months after the equipment is shipped or 12 months from the date of signing the installation acceptance report, whichever comes first;

5) The service center of Party B provides high-quality services to Party A. Upon receiving the repair invitation from Party A, Party B's engineer shall arrive at Party A's site within 48 hours for repair. During the warranty period, any parts replaced due to instrument quality rather than non-human factors shall be provided free of charge by Party B (excluding vulnerable parts and consumables), and Party B shall be responsible for resolving them free of charge;

6) Any other matters not covered shall be resolved through friendly cooperation and negotiation between both parties, based on the principle of ensuring the quality of the instrument, normal operation, and delivery deadline.