1. The Working Principle Of Dissolved Gas Analyzer

        Huazheng Electric Dissolved Gas Analyzeric analysis technique is an analysis of multicomponent mixture separation and analysis technology. It mainly uses the difference in boiling point and polarity of sample and in the chromatographic column adsorption coefficient, so that the various components in chromatographic column can be separated and analyzed qualitatively and quantitatively.

       A Dissolved Gas Analyzer use gas as a liquid phase (carrier gas).When the sample is fed into the injector and gasified,it will get into the packed column or capillary column with the carry of carrier gas. due to the differences in boiling point, polarity and adsorption coefficient of sample the various components in column will be separated.Then detect the components by the column after the detector according to the physical and chemical characteristics of components.Finally sent it to the chromatography workstation through the local area network (or the Internet) ,recording and analysis the components of the gas chromatogram by chromatography workstation and obtain  the components analysis report. The working principle diagram is shown below:

Pic1.1 Dissolved Gas Analyzer working principle diagram

      Because the method has characteristics of high separation efficiency, fast speed of analysis and less consumption of sample, so it has been widely used in petroleum chemical industry, biological chemistry, medicine and health, the health and quarantine, food inspection, environmental protection, food industry, medical and clinical departments. Dissolved Gas Analyzery has solved the industrial production of intermediates and quality inspection of industrial products, scientific research, environmental testing, production control and other issues in these areas.

2 Characteristics Of HZGC-1212ASeries Dissolved Gas Analyzer

     As we all knows, the traditional Dissolved Gas Analyzer is working with 1 chromatographs, 1 AD converters, 1 sets, 1 sets of computer printer mode. In this way the chromatograph should be equipped with more chemical factory, laboratory, colleges and universities ,the use and management of equipment is very inconvenient,the equipment should be invested duplicately and wasting seriously . Equipped with a large number of computers in the equipment management and data management also bring a lot of inconvenience to the user. At the same time, the traditional mode is often use the Dissolved Gas Analyzer of one manufacturer and workstation of another manufacturer to make the whole system.These make the function of the overall system difficult to express and the performance of the system difficult to improve.Not to speak of the function increasing raised by users (such as remote monitoring data transmission, the monitoring instrument etc.). 

       Aiming at the disadvantages of the traditional Dissolved Gas Analyzer, Huazheng Electric Manufacturing(Baoding) Co.,Ltd use its strong technology development strength and the brand new industrial modeling and electronic circuit, and apply the mainstream of the technology (IP Technology) to the Dissolved Gas Analyzer, then develop the new type of Dissolved Gas Analyzer. This instrument completely abandon the production of chips , disassemble the chip and RS232 serial communication which is on the out and use the latest high integration of industrial-grade chip, bussing technique, Ethernet technology, micro flow gas control technology and data processing technology, optimized the temperature program and gas control, improve the reliability of the instrument and the maintenance fundamentally .

Due to network technology and high precision AD conversion circuit,the series of HZGC-1212ADissolved Gas Analyzer thoroughly break the work mode of existing of cumbersome bulky chromatograph and enables multiple chromatograph sharing 1 sets of computer to complete data analysis, printing, storage become a reality, and realize the remote transmission of remote monitoring and chromatographic data instrument the maximum degree, reduces the user laboratory investment and operation cost, convenient the management of real-time tracking of product quality. Figure 1.2 is the HZGC-1212Anetwork chromatograph working diagram.

Fig.2 the HZGC-1212A  network chromatograph working diagram

The series of HZGC-1212ADissolved Gas Analyzer has the following functions and features:

★ Using the advanced technology of the 10/100M adaptive Ethernet communication interface, and a built-in IP protocol stack,so that the instrument can easily through the intranet, Internet to realize the long-distance data transmission; convenient laboratory erection, simplifies the laboratory configuration and convenient data management;

★ Within the instrument 3 independent connecting process is designed and can be connected to the local processing (Laboratory), head of unit (such as quality inspection, production director, chief), as well as the supervisor (such as environmental protection bureau, bureau of technical supervision and so on),can make the unit in charge of the main pipe and the real-time monitoring instrument and data analysis results easily;

★ The NetChrom^TM workstation equipped with the instrument can simultaneously support many sets of chromatograph working at the same time, realize the data processing and countercharge, simplifies the document management, and reduce the maximum user laboratory investment and operating costs;

★ The instrument can be connected to the manufacturers through the Internet, to realize the remote diagnosis, remote program update (need user license);

★ The instrument can be equipped with a 5.7 inch color LCD screen or 192*64 monochrome LCD screen, meet the needs of different users;

★ System has 2 sets of operating system which are in English and Chinese and can be switched freely

★ Temperature control area can be named by the user, is convenient for the user to use;

★ The instrument uses a multiprocessor parallel working mode, the instrument is more stable and reliable; can be equipped with a variety of high performance detector selection, such as FID, TCD, ECD, FPD and NPD ,can be installed with 3 types of detector at the same time, up to three detector, which can meet the complex sample analysis. Also can use detector append mode, so that you can choose other detector conveniently after you purchase the instrument.

★ The instrument adopts modular structure design.The design is clear, convenient to replacement upgrade and protect the effectiveness of investment;

★ New microcomputer temperature control system, high precision of temperature control , reliability and anti-interference performance; have six completely independent temperature control system, can realize the sixteen step temperature-programmed, analysis enables the device to do a greater range of samples; has a pillar box after automatic door system, the temperature control precision is improved, heating-up/ cooling faster;

★ Instrument can be matching with advanced electronic flow controller (EFC) and electronic pressure controller (EPC),realizing the pneumatic digital control, can greatly improve the stability and reproducibility of the quantitative result;

★ The instrument has a timing start automatically program, can complete online analysis of gas samples easily (to be equipped with automatic sample parts);

★ Built-in chromatography machine with low noise, high resolution of 24 bit AD circuit, and has the functions of storage, baseline baseline deduction.

★ Random equipped with workstations is suitable for both Chinese and English WinXP, Win2000, Win7, Win8 operating system.

★ The chromatographic system with completely independent intellectual property rights has the standard interface of MODBUS/TCP, and can be easy docking with DCS .

★ The instrument can dock with many national and international manufacturers of the autosampler ; such as SHIMADZU AOC-20i, Italy HTA company's HT series automatic sampler.