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EDS3-110D Datasheet(PDF) 5 Page - Fuji Electric |
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EDS3-110D Datasheet(HTML) 5 Page - Fuji Electric |
5 / 16 page 5 Description of sample switching system The measured gas is divided into two, and in one of the flow paths, a high performance converter is provided to con- vert carbon monoxide into carbonic acid gas. Here, the carbon monoxide in the measured gas is eliminated and the gas is led into one cell of the high-sensitivity infrared ana- lyzer. In the other flow path, the gas is led directly into the other cell of the analyzer. These flow paths are changed over via changeover valves SV 1 and SV2 every 50 seconds by means of the changeover valve drive signal transmitted from the analyzer. By carry- ing out this changeover cyclically, the output of the ana- lyzer varies with the concentration of the carbon monoxide in the measured gas. Use of the obtained variation width as a measured value enables improving the S/N ratio and eliminating the effect of interfering components plus zero drift. Infrared light source (single light source) Motor Rotary sector (one-point chopper) Sector synchronous signal Alarm output Range identification signal Calibration output SV drive signal Remote range input External hold input (Option) Output, 0 to 1V or 4 to 20mA DC Operating key Sample gas inlet Sample cell AC voltage amplifier Sample gas outlet Gain changeover A/D CPU Relay drive signal Indicator Indication D/A Contact input,output RAM ROM Distribution cell (interference filter) Interference compensating detector Trimmer Reference cell Reference gas inlet Reference gas outlet CO measured gas 1ry filter Pump SV4 Reference gas SV3 SV1 SV2 SV2 SV1 Temperature controller CO/CO2 converter Flowrator 2ry filter ZRG3 Reference cell Sample cell Sample switching type analyzer Relay Output signal FUNDAMENTAL DIAGRAM (Sample switching type) |
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Similar Description - EDS3-110D |
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