Oxygen nitrogen hydrogen analyzerCharacteristics:
Whole machine structure
The whole machine adopts a modular integrated design, with four independent modules including pulse electrode furnace, gas system, circuit system, and detection system integrated into a floor standing host, with a simple and elegant appearance. It has the functions of automatic zero adjustment and automatic switching between high and low ranges. Adopting a universal approachA 64 bit computer is used to control the entire machine, with a 32-bit embedded ARM microcomputer control and a 24 bit high-precision data acquisition system in the host, meeting the requirements for high control accuracy and speed.
Electrode furnace system
The pulse electrode furnace has a high heating temperature and uses program-controlled power. It can provide various program-controlled heating methods such as constant power heating, slope heating, and segmented heating to improve analysis accuracy. It is suitable for rapid analysis of low melting point materials such as aluminum alloys to high melting point materials such as tungsten alloys. The electrode is suitable for various types of crucibles, and according to the release situation of different samples, various crucibles including sleeve crucibles and high-temperature crucibles can be selected to effectively reduce the user's operating costs.
The electrode cooling 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.
pneumatic system
The whole machine adopts an integrated floor standing design, which provides a spacious environment and greatly reduces the connection routes of the air system, making the air system of the whole machine more concise and reliable.
The pneumatic components, including solenoid valves, cylinders, pneumatic pipes, and pneumatic joints, all use imported componentsThe lifespan of solenoid valves can reach over a million cycles. The unique three-axis guiding cylinder can ensure the smooth lifting and lowering of the electrode, ensure good contact between the graphite crucible and the upper electrode, and ensure uniform force on the graphite crucible, which is conducive to long-term high-temperature heating. The automatic feeding furnace head with air curtain protection and automatic air blowing mechanism effectively ensure the accuracy of oxygen element analysis.
The furnace head has a split structureThe upper and lower electrodes are easy to disassemble and replace, and the lower electrodes are made of high-temperature alloy material, which has a long service life and low usage cost, avoiding the trouble of using a whole furnace head and requiring professional technicians to replace the electrodes.
Pollutants are discharged from the furnace topNot entering the system, easy to operate, with low requirements for system sealing.
Simple injection deviceAnd it can automatically inject samples for easy maintenance and cleaning in case of abnormal faults.
The use of electronic microflow sensors for high-precision flow control minimizes the impact of airflow changes on analysis.
Circuit system
The circuit system adopts large-scale integrated circuit boards, and the power supply adopts solid-state power modules with short-circuit protection function. The power modules are resistant to current impact, strong anti-interference ability, dust-proof, simple and reliable;
detection system
Analysis method:
Oxygen: infrared absorption method, nitrogen: thermal conductivity method, hydrogen: infrared absorption method (or thermal conductivity method)
The use of infrared hydrogen detection technology can avoid the inherent weakness of thermal conductivity hydrogen detection method that cannot simultaneously detect nitrogen. It truly achieves the simultaneous detection of oxygen, nitrogen, and hydrogen elements, and can use high-temperature catalysts without the need for expensive room temperature catalysts, with low operating costs.
Infrared detector:
Integrated solid-state infrared sensor for measuring oxygen and hydrogen, with multiple range infrared detection cells available for selection. The infrared light source uses efficient and long-life precious metal miniature infrared emitters and gold-plated metal reflectors; The modulation system uses a high-precision stepper motor controlled by a microcontroller to ensure long-term stability of the modulation frequency, combined with internationally advanced narrowband filters and high-precisionThe A/D sampling card enables the whole machine to have extremely high detection sensitivity, which can effectively detect oxygen content at the ppm level and hydrogen content at the ppb level. The instrument also uses advanced temperature compensated semiconductor detectors to reduce external influences and stabilize baseline signals.
Thermal conductivity detector:
Adopting a high-sensitivity thermal conductivity detection cell, the cell current is continuously adjustable, ensuring that the equipment operates within the range Each stage of the enclosure has excellent sensitivity and linearity, combined with high-precision amplifiersThe 24 bit A/D sampling card and other hardware ensure the accuracy of measuring nitrogen and hydrogen in a large range from ultra-low to high content. The detection system adopts a low drift, high-precision, large range, high-sensitivity thermal conductivity detector with low failure rate, strong reliability, and good stability.
