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Instruction Manual
748467-A
January 2002
Model MicroCEM
Continuous Emissions Monitor
http://www.processanalytic.com
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ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you MUST properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions MUST be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Analy
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Instruction Manual 748467-A January 2002 Model MicroCEM TABLE OF CONTENTS PREFACE...........................................................................................................................................P-1 Definitions...........................................................................................................................................P-1 Intended Use Statement..................................................................................................
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Instruction Manual 748467-A January 2002 Model MicroCEM 2-0 INSTALLATION ....................................................................................................................2-1 2-1 Overview................................................................................................................................2-1 a. Limitations.......................................................................................................................2-1 b. Mounting Options.......
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Instruction Manual 748467-A January 2002 Model MicroCEM 4-0 SOFTWARE ..........................................................................................................................4-1 4-1 Overview................................................................................................................................4-1 4-2 MicroCEM User Interface Software.......................................................................................4-1 4-3 MicroCEM Web Server Software .
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Instruction Manual 748467-A January 2002 Model MicroCEM LIST OF ILLUSTRATIONS Figure 1-1. Absorption Bands of Sample Gas and Transmittance of Interference Filters ....... 1-3 Figure 1-2. Opto-Pneumatic Gas Detector............................................................................... 1-4 Figure 1-3. Overall NDIR Method............................................................................................. 1-5 Figure 1-4. Paramagnetic Oxygen Analysis...............................
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Instruction Manual 748467-A January 2002 Model MicroCEM Figure 5-2. Converter Assembly .............................................................................................. 5-3 Figure 5-3. Personality Modules and Backplane. .................................................................... 5-4 Figure 5-4. Chemiluminescense Detector Assembly ............................................................... 5-6 Figure 5-5. Chemiluminescense Detector Assembly – Exploded View ..............
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Instruction Manual 748467-A January 2002 Model MicroCEM vi Contents Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 748467-A January 2002 Model MicroCEM PREFACE The purpose of this manual is to provide information concerning the components, functions, in- stallation and maintenance of the MicroCEM. Some sections may describe equipment not used in your configuration. The user should become thoroughly familiar with the operation of this module before operating it. Read this instruction manual completely. DEFINITIONS The following definitions apply to DANGERS, WARNINGS, CAUTIONS and NOTES foun
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Instruction Manual 748467-A January 2002 Model MicroCEM INTENDED USE STATEMENT The MicroCEM Continuous Emissions Monitor is intended for use as an industrial process meas- urement device only. It is not intended for use in medical, diagnostic, or life support applications, and no independent agency certifications or approvals are to be implied as covering such applica- tions. SAFETY SUMMARY If this equipment is used in a manner not specified in these instructions, protective systems may be impa
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Instruction Manual 748467-A January 2002 Model MicroCEM DANGER. TOXIC GAS This device may contain explosive, toxic or unhealthy gas components. Before cleaning or chang- ing parts in the gas paths, purge the gas lines with ambient air or nitrogen. This unit’s exhaust may contain hydrocarbons and other toxic gases such as carbon monoxide. Carbon monoxide is highly toxic and can cause headache, nausea, loss of consciousness, and death. WARNING: TOXIC GAS Avoid inhalation of the exhaust gases at
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Instruction Manual 748467-A January 2002 Model MicroCEM CAUTION. HEAVY WEIGHT Use two persons or a suitable lifting device to move or carry the instrument. P-4 Preface Rosemount Analytical Inc. A Division of Emerson Process Management
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Instruction Manual 748467-A January 2002 Model MicroCEM GENERAL PRECAUTIONS FOR HANDLING AND STORING HIGH PRESSURE GAS CYLINDERS Edited from selected paragraphs of the Compressed Gas Association's "Handbook of Compressed Gases" published in 1981 Compressed Gas Association 1235 Jefferson Davis Highway Arlington, Virginia 22202 Used by Permission 1. Never drop cylinders or permit them to strike each other violently. 2. Cylinders may be stored in the open, but in such cases, should be protected aga
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Instruction Manual 748467-A January 2002 Model MicroCEM DOCUMENTATION The following MicroCEM instruction materials are available. Contact Customer Service Center or the lo- cal representative to order (See Section 8). 748467 Instruction Manual (this document) 748468 Instruction Manual, MicroCEM Sample Handling System COMPLIANCES This product may carry approvals from several certifying agencies. The certification marks appear on the product name-rating plate. CSA (Pending) P-6 Prefa
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Instruction Manual 748467-A January 2002 Model MicroCEM SECTION 1 DESCRIPTION AND SPECIFICATIONS 1-1 OVERVIEW NO and oxygen (O ). Some of the NO 2 2 2 molecules produced are in an electroni- The MicroCEM Analyzer Module is designed cally excited state (NO * where the * re- 2 fers to the excitation). These revert to the to continuously determine the concentration of O , CO, and NOx in a flowing gaseous mix- ground state, with emission of photons 2 (essentially, red light). The reactions in- ture
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Instruction Manual 748467-A January 2002 Model MicroCEM Other application-dependent options in- measured. The gas-specific wavelengths clude a wide range of sample cell materi- of the absorption bands characterize the als, optical filters and solid state type of gas while the strength of the ab- detectors. The NDIR Microflow detector sorption gives a measure of the concen- consists of two chambers, measurement tration of the gas component being and reference with an interconnected path measured
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Instruction Manual 748467-A January 2002 Model MicroCEM The signal generation is accomplished with a pyroelectrical (solid-state) detector. The detector records the incoming infra- red radiation. This radiation is reduced by the absorption of the gas at the corre- sponding wavelengths. By comparing the measurement and reference wavelength, an alternating voltage signal is produced. This signal results from the cooling and heating of the pyroelectric detector mate- rial. CO CO 2 Absorption Band H
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Instruction Manual 748467-A January 2002 Model MicroCEM Opto-Pneumatic Method In the opto-pneumatic method, a thermal When the infrared radiation passes radiator generates the infrared radiation through the reference side of the analysis which passes through the chopper wheel. cell into the detector, no pre-absorption This radiation alternately passes through occurs. Thus, the gas inside the absorp- the filter cell and reaches the measuring tion chamber is heated, expands and and reference side
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Instruction Manual 748467-A January 2002 Model MicroCEM Overall NDIR Method depending on the application and need for reduction of influences. Then the infrared In the case of dual-channel analyzers, the radiation enters the analysis cells from broadband emission from two infrared which it is focused by filter cells onto the sources pass through the chopper wheel. corresponding detector. The preamplifier In the case of the Interference Filter Cor- detector output signal is then converted relatio
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Instruction Manual 748467-A January 2002 Model MicroCEM b. Paramagnetic Oxygen Method be drawn towards the region of greatest magnetic field strength. The oxygen The paramagnetic principle refers to the molecules thus exert different forces on the two suspended nitrogen filled quartz induction of a weak magnetic field, paral- lel and proportional to the intensity of a spheres, producing a torque which causes the mirror to rotate away from its stronger magnetizing field. equilibrium position. The
