6888 In Situ Flue Gas Oxygen Transmitter - 16 Pages

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6888 In Situ Flue Gas Oxygen Transmitter

Catalog excerpts

Product Data Sheet April 2014 In Situ Flue Gas Oxygen Transmitter n World-ClassTM performance n Outstanding accuracy – HART® 7 EDDL standard – FOUNDATION FieldbusTM – AMS/PlantWeb® compatible n Optional Xi local operator interface – large backlit LCD display – advanced software features n Adaptable to any existing O2 probe installation – Westinghouse World Class – Rosemount Oxymitter – Most competitive O2 Probe installations n Advanced sensor diagnostics – calibration recommended diagnostic – plugged diffuser/filter diagnostic n Fully field-repairable n Variable probe insertion option n HART® wireless communication from probe or Xi The new standard for combustion flue gas analysis The 6888 in situ O2 transmitter provides accurate measurement of the oxygen remaining in the flue gases coming from any combustion process. Optimal combustion efficiency can be obtained by maintaining the ideal level of oxygen in the flue gases coming from these processes and the lowest level of NOX, CO and CO2 are produced. Easy to use and easy to integrate. This in situ analyzer was designed with customer ease-of-use in mind. There are no moving parts or sampling apparatus resulting in an extremely reliable probe that requires very little maintenance. Xi Electronics shown with optional Smart Wireless THUMTM adapter

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The latest breakthrough for combustion flue gas analysis The 6888 in situ O2 analyzer provides accurate measurement of the oxygen remaining in the flue gases coming from any combustion process, including: n Boilers n Kilns n Incinerators n Process Heaters n Industrial Heating Furnaces By maintaining the ideal level of oxygen, the flue gases coming from these processes, optimal efficiency is gained, and the lowest level of NOx, CO, and CO2 are produced. This in situ design places a zirconium oxide sensing element at the end of a probe, which inserts directly into a flue gas stream. There are...

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General Purpose 6888 Variable Insertion Option Lengths from 18" (.5m) to 12' (3.65m) the new variable 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. Installation may be vertical or horizontal. On-board electronics On-board electronics provides heater control and signal conditioning, resulting in a linear 4-20 mA signal representing flue gas oxygen. Electronics temperature specification is 85°C (185°F). No special signal cable is required. HART® 475 communicator or AMS...

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Advanced Features April 2014 6888 probe with integral autocal solenoids Integal automatic calibration - available with Xi electronics Plant personnel often ask how frequently an oxygen analyzer requires calibration. The answer is very applicationdependent based upon the fuels being burned, the normal levels of oxygen, and the sulfur content in the flue gases. The 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 electronics has an...

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Advanced Software features (available with the Xi electronics) Heaterless operation The 6888 oxygen analyzer employs a heater and thermocouple to maintain a temperature setpoint at either 550°C (1022°F) or 736°C (1357°F). Temperature control is maintained within ±1°C. At process temperatures above the selected temperature setpoint, the probe heater remains off and the electronics calculates O2 based on process temperature. It should be noted that cell life will be reduced by continuous operation at temperatures above 800°C (1472°F). If process temperatures are expected to be continuously...

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Plugged Diffuser Diagnostic For use in applications where there is a heavy particulate loading in the flue gas stream. This feature notes the “return to process” time after calibration gases are turned off. As this time extends after multiple calibrations over many months, a diagnostic will indicate that the diffuser should be replaced in the near future. 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 its signal at the low oxygen levels...

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Probe electronics Net O2 range variable 0-10% to 0-50% (Xi electronics offer 0-50% O2 range) Probe electronics ambient temperature limits -40° to 70°C (-40° to 158°F) Accuracy in oxidizing conditions ±0.75% of reading or 0.05% O2, whichever is greater Temperature limit as measured inside probe electronics -40° to 85°C (-40° to 185°F) Lowest detectable limit 0.02% O2 Process temperature effect less than 0.05% O2 from 100-700°C System speed of response to calibration gas Initial response in less than 3 seconds, T90 in less than 8 seconds. Response to process gas changes will vary, depending...

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Specifications (cont) Cal gas flow 5 scfh (2.5 l/m) Heater electrical power 100 - 240V, ±10% 50/60 Hz 1/2˝— 14˝ NPT conduit ports Power consumption of Xi 12VA maximum or 776VA maximum with Traditional Architecture, 120V, Probes. 450VA maximum with Traditional Architecture, 44V Probes Traditional architecture cable 200 foot (61m) maximum length Alarm relay outputs Two provided - 2 Amperes, 30 VDO, Form-C Power consumption of probe heater 776VA maximum during warm-up Optional loss of flame input internally powered input to remove heater power, actuated via dry contact output from prove of...

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Dimensional Drawings Probe Installation Dimensions Note: All dimensions are in inches with millimeters in parantheses Hastealloy Diffuser During assembly align deflector to face flow as shown. Ceramic Diffuser Standard Tube: 2.25 [57.15] Abrasion Tube: 2.38 [60.45] MINIMUM REMOVAL LENGTH Table 1. Mounting Flange DIM "B" Removal Envelope Accessory Housing DIM "B" Removal Envelope Standard Housing Probe Length Add 3.80 (96) to DIM "A" and DIM "B" for probe with ceramic or Hastealloy™ diiffuser Table 3. Installation Weld Plate Outline ANSI "A"

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