【正文】 ith flux and delivered to bustor of highfrequency furnace. The first phase of analysis is oxygen blowing. True solenoid valve is first opened for oxygen input as analysis flow so that residual CO2 and SO2 are removed in pipeline. If contents of CO2 and SO2, as well as partial pressure of measured gas, are 0, reference signal under pure oxygen will be acquired. The second phase is release. Highfrequency furnace is started to heat sample to release temperature. At this, sample is immediately oxidized to CO2 and SO2 under high temperature and rich oxygen, and delivered to absorption cell with oxygen acting as carrier. Output signal of amplifier decreases with increase in concentration of measured gas. After normalization, all data is corrected in linearized way. With data from this, percentages of C and S are concluded upon area integration, multiplication by coefficient and blank deduction.Chapter II Instrument StructureCS206 is prised of electronic balance, analysis host (AIO prised of high frequency bustion furnace, infrared gas inspection and gas circuit system), puter and printer. Each part is connected via cable or gas pipe, to plete sample weighing (weight input), bustion (CS oxidation release), measurement, data processing and data (statement) printing.I. Electric balanceWhat is to be achieved is weight percentages of C and S, thus weight value of measured sample from electronic balance is necessary for data normalization. Weight value is directly and automatically input to upper microputer via serial port and munication line of balance. Measured object is weighed and busted in crucible. Treated empty crucible is put on electronic balance. Its weight can be automatically deducted by electronic balance with analysis software. Then, measured object is put in. When balance gets stable, weight of measured object can be automatically input to puter if Enter is pressed. II. Computer Computer supports data acquisition, operational processing, database management, realtime control, manmachine dialog and online operation with printer, electronic balance, data transmission unit and other peripheral equipments. Comprised of host, display, keyboard and mouse, puter needs 1 serial port at least. Analysis software of CS206, which is installed under root directory of disk C, needs support by Windows 2000 or Windows XP. III. Analysis hostAnalysis host is prised of high frequency heating equipment, gas circuit system, CS signal detection system and control unit. Measured sample is heated and busted to release CO2 and SO2, and delivered to inspection system after dedusting and drying.1. Front view1. Grid current meter 2. Plate current meter 3. Flow analysis meter 4. System pressure gauge5. Analysis gas dehydrant 6. Oxygen dehydrant 7. O2/CO2 absorbent 8. System pressure setter9. Burner cleaning cylinder 10. Analysis gas outlet 11. Burner (with filter screen built in) 12. Crucible13. Quartz crucible support 14. Ash discharge button 15. Lifting handle2. Left view1. Flow controller 2. Infrared analysis gas chamber 3. A/D sampling circuit board 4. Power supply of solenoid valve control panel5. Hightension transformer 6. Filament transformer 7. Highvoltage silicon rectifier stack 8. Power supply of A/D sampling panel9. Solenoid valve control panel3. Right view1. Burner temperature control panel 2. Power switch 3. Ash discharge/clearing button 4. Limit switch5. High frequency furnace power switch 6. Electronic tube 7. Holddown valve 8. Ash discharge pipe 9. High frequency furnace control module4. Back view1. High frequency furnace cooling fan 2. High frequency furnace cooling fan 3. External oxygen inlet 4. Fuse5. Ash discharge pipe 6. Power line 7. External power gas inlet 8. Exhaust opening9. Oxygen input () 10. Data line 11. Oxygen pressure stabilization filter 5. High frequency bustion furnaceIt is prised of high frequency oscillating source, highvoltage power, burner dedusting device and control device. Measured sample is heated and busted to release CO2 and SO2, and delivered for infrared inspection after dedusting and drying. (1) Composition of high frequency bustion furnaceUnder action of high frequency bustion furnace, analysis sample is heated, melted and busted to release CO2 and SO2. Components: 1) High frequency power supply and filtering ponent 2) Highvoltage power3) High frequency oscillating circuit (in closed metal box) (2) High frequency oscillating circuitComponents of main oscillating circuit: high frequency oscillating tube 17, vacuum capacitor C3, feedback zone Comprised of capacitor C5 and induction coil, main oscillating circuit is a member of threepoint oscillation system of capacitor, together with plate coupling capacitor C1 and grid coupling capacitor C6.High Frequency Oscillating Circuit (Top View) 1. Coupling capacitor C4 2. Vacuum capacitor C3 3. Grid plate choke LG14, high frequency induction coil (heater coil) 5. Capacitor bank of main oscillating circuit C2 6. Grid plate coupling capacitor C17. Valve holder 8. Filament power terminal 1 9. Ground grid 10. Filament power terminal 2 (earth terminal) 11. Grid current trimmer potentiometer R1 12. Grid filtering capacitor C613 Grid plate high frequency choking coil LGB 14. Highvoltage input end 15. Filter capacitor C5 16. Plate choking coil LA 17. High frequency oscillating valve IV. Working gas circuit (oxygen analysis circuit) Components: Gas source (oxygen purity%) Gas purification devices Burner Working gas circuit control device Power gas circuit Control signal receiver board(1) Gas purification devices Oxygen purification tube Metal filter screen Analysis gas drying tube(2) Burner Metal filter screen Brass wire brush for