The GC-900-SD gas chromatograph is a power system specific gas chromatograph designed and manufactured by Shanghai Haixin Chromatography Instrument Co., Ltd. in accordance with the gas chromatography process recommended in the national standard GB/T 17623-1988 "Determination of Dissolved Gas Components in Insulation Oil by Gas Chromatography" and the power industry standard GB/T 7252-2001 "Guidelines for Analysis and Determination of Dissolved Gas in Transformer Oil" of the People's Republic of China. The machine adopts a three detector process, with one injection, dual column parallel connection, and one split flow. In terms of detection sensitivity, chromatographic peak separation, and quantitative accuracy, it is superior to the requirements of national standards and industry standards (referred to as guidelines). GC-SD chromatography workstations connected to dual channels have become manufacturing enterprises for oil filled electrical equipment in the power industry, including transformer factories, mutual inductance factories, high-voltage porcelain factories, bushing factories, etc; And the use of high-efficiency specialized gas chromatographs with superior performance, easy operation, and sensitive detection by enterprises such as power plants and power supply bureaus. |
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Main Technical Performance
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Stable and reliable microcomputer control system
◎ Adopting microcomputer automatic control, full keyboard operation, convenient human-machine dialogue function, and switching of detector signals through time programming;
A highly stable circuit control system ensures that the instrument has high reliability:
◎ Equipped with comprehensive column box and detector overheat protection function;
◎ File storage function for ten analysis condition parameters;
◎ Stopwatch function.
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Efficient and sensitive detection system
Both FID and TCD detectors are designed and manufactured using advanced technology, featuring high sensitivity, low noise, and a wide linear range
The FID adopts a cylindrical collection electrode. The nozzle uses quartz and stainless steel inorganic bonding technology, which is resistant to high temperatures, has high mechanical strength, is not easily contaminated, and has a high response to hydrocarbons;
TCD adopts a semi diffusion structure. The power supply adopts a constant current control method. Using highly sensitive rhenium tungsten wire as a thermistor, it has a sensitive response to both H2 and O2.
- Advanced and unique pneumatic process system
◎ Adopting a dual column parallel diversion system, equipped with TCD and dual FID detectors and a nickel conversion furnace, automatic full analysis of 8 gas components dissolved in oil can be achieved with one injection:
The sample gas enters the FIDl detector through one carrier gas to detect hydrocarbon gases, and enters the TCD detector through another carrier gas to detect H2 and 02; Then it goes through a nickel conversion furnace. Upon entering the FlD2 detector, CO was detected C02， Overcoming the interference of a large amount of CO and CO2 on the detection of hydrocarbon gases, especially C21'1 z, greatly improves the detection sensitivity of hydrocarbon gases:
The sensitivity of FlDL and FID2 can be set separately, reducing the detection impact caused by differences in gas content.
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- High performance detector configuration
Easy to operate: The fully Chinese window interface, real-time operation prompts, and online help make it convenient for users to learn and use.
Real time performance: Real time bus data acquisition in a true tWi rldows environment, dual channel simultaneous sampling, and real-time display of chromatographic peak retention time.
◎ High precision: 24 bit high-precision A/D card, input range: 1.25V~+1.25V.
◎ Reproducibility: O．006％
Open data management: Save complete device information and analysis result data information. Easy to add, modify, delete, and freely access and search. Open data format. Suitable for multi-user data sharing, facilitating access to other database management software and meeting the retrieval needs of management departments.
◎ Automatic fault diagnosis: automatic over limit prompt after analysis, providing three ratio diagnosis that meets national standards, TD diagram, component concentration diagram and other multiple fault diagnosis methods.
Easy qualitative analysis: The peak identification table can be automatically or manually edited. Automatically calculate correction factors and perform multiple average corrections.
Flexible peak recognition and processing capabilities: Chromatographic peaks can be identified, deleted, and baseline cut adjusted by setting parameters and time programs or manually modifying methods. Ensure the accuracy of the analysis results.
Flexible printing function: Provides result reports in both fixed format and custom template formats.
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