英国仕富梅集团有限公司

Servomex 2500 Series Process Analysers 高性能，稳定并且坚固的红外过程分析仪，可安装于安全区域或危险区域

2500 Introduction 测量池 光源端 检测器/显示端

Servomex 2500系列红外分析仪 欧共体一区/二区与美国FM一类一区/二区防爆认证 2500/ 2510/ 2520/ 2550 欧共体一区/二区与美国FM一类一区/二区防爆认证 可测多组分(CO/CO2, CO/CO2/CH4, CO2/C2H4/ CH4) (2550) 精确度：<1% fsd；零点漂移：<1% fsd/ 每周 两路隔离4-20mA模拟输出；三路报警接点 自诊功能; 自动标定软件 可选配不同材质测量室 测量室温控在60-1300C 可带温度与压力补偿 2500 可测液态浓度 2520 可测氯气 低量程可用相关红外技术(2510)

2500 过程分析仪系列 2500 SBDW IR 适用于单组分, IR/NIR, 介质可以是气体或液体, ppm 或 % 浓度的分析 2550 MCIR 1/2/3 个组分, ppm or % 浓度的气体分析 2510 GFC 单组分, ppm 浓度的气体分析

2500 系列的特点 具有用于可燃性液体或气体完备的认证(包括: H2, CO, HC’s等) 测量室维护简单 完整的自动标定/自动检查功能 键盘操作简单易用，直观的菜单驱动软件

2500 系列的认证 02500EU1, 2510EU1, 2550EU1 ATEX Category 2. II 2 (1) G EEx p ia [ia] IIC T4 (测量室加热), T5 (测量室不加热) 02500EU2, 2510EU2, 2550EU2 ATEX Category 3. II 3 G EEx nCL IIC T4 (测量室加热) (测量室不加热可以为 T3 或 T4) 02500FM2, 2510FM2, 2550FM2 FM (USA) Class 1, Div 2 Groups A,B,C,D T4 (测量室不加热) Class I, Zone 2 Group IIC T4 (测量室不加热) (测量室加热可以为 T3 或 T4)

2500 系列的性能 本质误差 (精度) < 1% FS) 重复性 0.5% FS 输出噪音 < 1% FS 操作温度 0℃ 至 +55℃ (测量室控温＞130°C时最大为 50°C ) 环境温度变化 < 25℃ / 小时

2500 测量原理

仕富梅红外技术 穿透率 红外光波长 SO2 CO2 CO 气体能吸收不同波长的红外光并有独特的红外光谱吸收特性， 利用此特性可测量样气浓度。

仕富梅红外技术 BEER-LAMBERT定律 A=ln(V0/V)= K·C·L 红外光范围:0.8μm~ 1000μm A: 吸收率

仕富梅单光束双波长红外构造 Single Beam, Dual Wavelength- SBDW 切光器马达 Chopper Motor 光学滤镜转盘 Filter wheel 镜片, Lens 样气室 Sample cell 镜片,Lens 热释电感测器 Pyroelectric Detector 红外光源, IR Source [2 - 15 micron] ( Broad band, hot wire filament)

仕富梅单光束双波长红外 穿透率 SO2 CO2 CO 2.0 5 8 15 波长(微米) 以参比滤光镜过滤被测测量组份不发生吸收的波长范围,例如CO2在6.0μm附近。 以测量滤光镜过滤被测测量组份发生强吸收的波长范围，例如CO2 在 4.3μm附近。

仕富梅单光束双波长红外 通过参比滤光镜的红外光不会被测量组份吸收。 感测器接收到的能量代表零点。 参比信号 R

仕富梅单光束双波长红外 红外 通过测量滤光镜的红外光部份会被测量组份吸收。 若通过的气体为量程气，感测器接收到的能量代表量程点。 被测组份浓度会和零点与量程点信号差值呈比例关系(非线性)。 测量信号 M 参比信号 R 红外

仕富梅单光束双波长红外特性 固态热释电感测器,不会老化和漂移。 抗震动且不受外界温度影响。 参比光和测量光通过同一个样气室，可消除因光源老化，镜片污染所造成的测量误差。 样气室材质可用316 SS，Monel或 Hastelloy，可耐高温与抗腐蚀。样气室在表外，可直接拆下清洗样气室和镜片。 维修保养方便，光源和感测器可直接更换，无校准(alignment)问题。 整体结构针对过程工艺应用设计，构造坚固且可防尘防水(IP65 or IP50)。

2500 硬件及维护

Connected together by the sample cell 2500 整体构造 The Servomex 2500 analyser consists of two end assemblies Connected together by the sample cell Detector end assembly Source end assembly Sample cell Assembly 18

2500整体构造 19

2500 光路示意图 Source and Detector Insulated and Thermostatically Chopper Motor IR Source Insulated and Thermostatically Controlled Chopper Box IR Filter on Rotating Wheel Sample In Sample Out Sample Cell Windows Solid State PyroElectric Detector Source and Detector Lens 1 Lens 2 Lens 3 Lens 4

Cell heater power connectors Source end assembly Chopper box Filter wheel Power control PCB Cell heater power connectors Autocal relays 21

Source End Assembly End boss Gas strut AC supply filter Connecting conduit Cell heater connector End boss scrubber 22

Chopper box Infrared Source Chopper box Scrubber port Lens Power Control PCB 23

2500 IR Sources Alloy/ceramic long wavelength source, hermetically sealed, high output: 2 - 15u (IR) Quartz Halogen short wavelength source: 1.0 - 2.5u (NIR)

2500 Detector Solid state, pyroelectric, broad band detector, ambient temperature operation, resistant to shock and vibration

Chopper Box Ribbon cable connector Chopper motor connector Thermal fuse connector Ribbon cable connector Thermal Sensor Chopper motor connector Optical sensor Chopper box PCB assembly 26

Narrow band-pass Optical Chopper box Thermal insulation Timing slots Narrow band-pass Optical Filters Optical sensor 27

Filter Wheel and Motor Rugged, solid state narrow band pass IR filters (typ. 2% BW), available 1.0 - 15u Measure and reference filters selected close together for increased stability Long life chopper motor, typically 3 years life Chopper box machined from solid block, insulated, thermostatically controlled at +65°C includes air scrubber assembly for removal of internal CO2 and Water 28

Detector end components Sensor Interface (SIB) PCB Microprocessor PCB Transmitter PCB Customer connections Switched mode power supply 29

Power Supply connector Detector end view Microprocessor PCB connector Transmitter PCB SIB Board connector Options PCB connector Customer connections Power Supply connector 30

Detector Housing Details Detector Scrubber Gain adjustment slot Detector housing Lens Assembly Purge port Detector pre-amplifier 31

Pyroelectric detector Detector end box Thermal sensor Pyroelectric detector Preamp 32

Pyroelectric Detector band detector, ambient Solid state, pyroelectric, broad temperature operation, resistant to shock and vibration 33

2500 Optical layout – Sample Cell Chopper Motor IR Source Insulated and Thermostatically Controlled Chopper Box IR Filter on Rotating Wheel Sample In Sample Out Sample Cell Windows Solid State PyroElectric Detector Sample Cell and Optics

Sample Cell Detail 35

Cell Maintenance – Parts identification Scrubber/purge ports End boss “O” ring seal Optical Window 36

Cell Tool Kit 37

2500 Sample Cell and Optics Removable sample cell, easy to clean Suitable for liquids or gases Optional electrical heating +30 ℃ to +130 ℃(FM), or steam heating +100 ℃. (180 ℃ operation for 2510 HCl emissions). Materials SS316, Monel, Hastelloy Pressures up to 150psig (standard), or higher Optics available: glass, IR quartz, Al2O3, CaF2, BaF2, ZnSe

2500 应用概览

2500 Series Application areas Petrochemicals Plastics / Synthetic fibres Chemicals / Inorganic chemicals Pharmaceutical / Fine chemicals Iron & Steel Refineries Natural gas processing

2500 Typical Measurements CO2, CO, CH4 Ethylene, Ethane Acetylene Water in EDC (and other organic liquids) Organic solvent vapours Phosgene HCN

英国仕富梅集团有限公司