X-STREAM^® In Situ Oxygen Transmitter

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AccuMax™ enhanced system performance Accuracy ±0.75% of reading or ±0.05% oxygen Signal stability of ±0.03% oxygen Insensitive to process temperature changes ±0.02% from 100-700°C Calibration validity of better than 0.02% Adaptable to most existing oxygen probe installations Loop-powered electronics HART® communications standard Extended process temperature range to 850°C (1562°F) Advanced sensor diagnostics, including "calibration recommended" Oxycore sensor core replacement in minutes Stoichiometer feature measures oxygen deficiency during reducing conditions Variable insertion option permits fine tuning insertion location AMS/PlantWeb® compatible with EDDL

THE LATEST INNOVATION FROM THE INVENTORS OF THE ZrO2 MEASUREMENT TECHNOLOGY The X-STREAM® In Situ Oxygen Transmitter is a probe-type in situ oxygen analyzer intended for use in measuring the residual oxygen remaining in the flue gases from any combustion process including: Boilers Process Heaters Kilns Recovery Boilers Reheat Furnaces Emerson Process Management is the leader in oxygen flue gas analyzer technology. Our in situ, zirconium oxide oxygen analyzers have long been established as industry standards. We've combined our expertise with the latest Rosemount Analytical transmitter technology to create a truly revolutionary package - the X-STREAM In Situ Oxygen Transmitter! The X-STREAM integrates an oxygen probe and field electronics into a single, compact package. The probe inserts directly into a flue gas duct to measure oxygen in combustion processes. No sampling system is required. A NEMA 4X, IP 66 Rosemount Analytical transmitter housing mounts directly to the probe and contains the transmitter's electronics, replacing common stand-alone field electronics. This integrated design minimizes the cost of installing separate probe cable, conduit and electronics. The X-STREAM electronics also require much less power to operate, reducing heat generated, and extending electronics life. The HART® communications with EDDL protocol provides a link into Emerson Process Management's PlantWeb® architecture. Setup, calibration and service diagnostics can be performed remotely with a HART 375 hand-held communicator, AMS or via a single or dual channel Xi enhanced interface. The Xi enhanced interface also carries advanced features such as automatic calibration, extended process temperature operation to 850°C (1562°F), Stoichiometer feature and programmable reference. One-time Installation The X-STREAM oxygen transmitter is easy to install. The probe tube can be threaded directly into an economical 2½" NPT thread or also use the more traditional flange mount. Adaptor flanges are available for most competitive probe mounts. Calibration and reference gas lines use ¼ inch ferrule fittings. AC line voltage directly powers the heater inside the probe and the transmitter electronics are loop-powered by the 2-wire 4-20mA signal. Once the initial installation is complete, the probe and its associated wiring and gas fittings never need to be removed. The new varible insertion option permits ideal placement of the probe into the flue gas duct. Probe can be adjusted at any time on-line to characterize stratification across large ducts.. Sensor core swap in minutes All active sensor components, including diffuser, sensing cell, heater and thermocouple are contained inside a sensor core assembly that can be exchanged in minutes. The failed sensor core can be completely rebuilt on the bench, including diffuser, cell, heater and thermocouple. Xi Enhanced Interface and Advanced Feature Electronics Interface to the X-STREAM transmitter for setup, calibration and diagnostics can be via HART Communications through a Model 375 Handheld Communicator through Emerson's AMS or through an optional single or dual-channel Xi Enhanced Interface. The Xi Enhanced Interface also carries several advanced features. ADVANCED Xi FEATURES AUTOMATIC CALIBRATION Plant personnel often ask how frequently an oxygen analyzer requires calibration. The answer is very application-dependent based upon the fuels being burned, normal levels of oxygen and the sulfur content in the flue gases. The X-STREAM Xi addresses this concern by providing an on-line diagnostic that determines when a calibration should be conducted, eliminating many unneeded calibrations, and the technician and gas resources they consume. The X-STREAM electronics has an on-line impedance measurement for the sensing cell. This feature can trigger a fully automatic calibration by sequencing soleniods to introduce calibration gases to the sensing cell. The Single Probe Sequencer (SPS) switches CAL gases to a single probe, while a Multi-Probe Sequencer (IMPS) can handle 1 to 4 probes. Many needless calibrations based on "time in service" are eliminated. A contact closure notifies the control room when a calibration is taking place. The oxygen output signal can be held at its last value, or released during calibration. The X-STREAM can also initiate calibrations by traditional methods: Contact closure from the user’s control room Time since last calibration feature – established by the autocalibration system Xi enhanced interface HART/AMS Extended Process Temperature Range to 850°C (1562°F) The X-STREAM Oxygen Analyzer employs a heater and thermocouple to maintain a temperature setpoint at 736°C (1357°F). Temperature control is maintained within ±1°C to process temperatures of about 705°C (1300°F). This is satisfactory for most applications, but excursions to higher temperatures can occur in many processes. In these instances, the heater is turned off and the process temperature is utilized to heat the sensing cell. Stoichiometer Process upsets can sometimes cause a combustion process to go into substoichiometric or reducing conditions. The oxygen readings from one or more probes may decline all the way to zero. The stoichiometer cell will measure the amount of oxygen deficiency during these reducing conditions. The trends in your DCS can be set up for a lower range limit of -1 or -2% oxygen to depict the level of oxygen deficiency. The operator can see if his control actions to recover are having the desired effect. These type of events do not occur frequently, but knowing the parameters of the situation prevents overcorrecting while coming out of the reducing condition. The oxygen reading is adjusted immediately to compensate for the varying process temperatures. It should be noted that cell life will be reduced by continuous operation at temperatures above 705°C (1300°F). If process temperatures are expected to continuously be above 705°C, we recommend the use of a bypass or probe mounting jacket accessory. Programmable Reference The zirconium oxide sensing technology has historically measured process oxygen by using ambient or instrument air as a reference (20.95% oxygen). The sensor develops most of it’s signal at the low oxygen levels typically found in combustion flue gases (2-4% oxygen) and is most accurate at these levels. When measuring at levels near ambient, however, the sensor develops only a few millivolts of signal and accuracy degrades. The programmable reference feature permits the user to use a bottled reference gas of low oxygen value (.4% oxygen recommended). When measuring at or near 21% oxygen, a strong negative oxygen signal results with much improved accuracy. A bottle of reference gas typically lasts about a month at the low flows required. Typical applications include: Flue Gas Recirculation – controlling the mixing of flue gases into the burner windbox prior to the burner to reduce NOx emissions. Moisture Monitoring – measuring the amount of moisture coming off of industrial dryers by noting the dilution effect water vapor has on the normal 20.95% ambient drying air. Enriched Oxygen Combustion – Pure oxygen is sometimes mixed in with the combustion air to increase heat at the flame. This is used in steel and other metals reduction processes and also in some catalyst regenerators. X-STREAM® IN-SITU OXYGEN TRANSMITTER FEATURES AND BENEFITS Features Benefits AccuMax™ enhanced system performance Operate combustion process with confidence. This improves both combustion efficiency and environmental performance of the system. Integrated oxygen probe and electronics simplifies installation Eliminates costs of mounting separate electronics. Eliminates cabling & conduit between probe and electronics In situ design. No sample system, sample probes, scrubbers, or pumps are necessary; test gas calibration check without disturbing the probe Low installation and maintenance costs Fast speed of response Sensor located in flue gases ideal for closed loop control Stoichometer feature measures the level of oxygen deficiency during reducing combustion conditions Provides critical information to operators during upset conditions "Calibration recommended" indication. On-line electrical check indicates need for calibration Opitimizes plant resources; reduces maintenance and calibration costs Field-replaceable cell quick change OxycoreTM assembly and plug-in electronics module Reduced down time and maintenance costs Normal operation in flue gas temperatures up to 1300°F (700°C). Optional configurations increase operation to 1562°F (850°C). Ideally suited to any combustion process and optional mounting hardware increases probe operability in high temperature processes Automatic line voltage selections Automatically selects from 100 to 240 VAC and 50/60 Hz. without configuration or set-up Extended process temperature capability to 1562°F (850°C) Allows seamless excursions in upset conditions without loss of measurement using optional Xi