Reliable flow data crucial in the fight against global warming
March 23, 2018
Given the current climate of pollution guidelines, engineers responsible for reporting stack gas emissions data to government authorities require precise monitoring of emissions.
The optional Continuous Emissions Monitoring System (CEMS) and Continuous Emissions Rate Monitoring System (CERMS) applications package available with the next-gen MT100 Series Multipoint Thermal Mass Flow Meters from Fluid Components International (FCI) is one solution to ensuring accurate monitoring is achieved.
According to a press release from FCI, its MT100 Series Flow Meters when specified with the optional CEMS and CERMS applications package meet the U.S. Environmental Protection Agency’s (EPA) 40 CFR Part 60 and 40 CFR Part 75. This package provides a 24-hour interval automated calibration drift test of low and high span points, and interference sensor check.
The MT100 meter’s optional CEMS applications package includes both an automated and on-demand self-checking of calibration drift (CD) and sensor interference. The results of the CEMS tests are presented as a simple pass or fail message on the LCD readout. The CEMS option also includes two relay outputs for connection to external devices, one to signal test in progress and the other to signal a fail-test mode.
FCI’s MT100 Series Air/Gas Flow Meters combine state-of-art electronics technology with application-proven precision flow sensors in a rugged package designed for the most demanding plant operating environments. They provide temperature-compensated direct mass flow measurement of air and gases for precise, repeatable measurement with low maintenance requirements in large diameter pipes, stacks and rectangular duct installations.
In heavy industries, such as electric power generation, petrochemical refineries and others, large diameter pipes and ducts present unique challenges to achieve successful flow meter installation and performance. Hot, moist and/or dirty gases along with lack of pipe straight-run, distorted flow profiles, low flow rates and wide turndowns rates are common performance challenges for many flow metering technologies.
FCI’s thermal mass MT100 Series air/gas Flow Meters are available with two to eight flow rate sensing points to overcome these issues. Multiple sensors are inserted at various depths within a pipe or duct and their outputs are multiplexed and averaged to produce the flow rate within the process line.
The MT100 meter’s sensors can be installed either across a mast or can be inserted at multiple points around the process line in a single plane. In large stack applications, this means that the instrument installation can be done at a single platform location to achieve a major cost savings over other technologies such as ultrasonic meters, which require installing transducers at precise offset angles.
In hot, dirty and/or moist or corrosive stack gases, the MT100 Flow Meters also excels because there are no moving parts, orifices or glass windows to foul or clog. The instrument can measure air/gas processes operating up to 850 °F (454 °C).
The MT100 Series Flow Meters can measure flow rates over a wide range from 0.25 to 1000 SFPS (0,07 to 305 NMPS) with 100:1 turndown and with excellent accuracy of ± 0.75 per cent of reading, ± 0.5 per cent of full scale. They are also dual-function and can provide temperature measurement capability from -50 to 850°F (-45 to 454 °C), with accuracy of ± 2 °F (± 1,1 °C).
The transmitter for the MT100 Series Flow Meter comes with an extensive choice of output options to interface with virtually any DCS, PLC, SCADA, or recorder. Dual, isolated, high resolution 4-20mA outputs compliant with Namur NE43, HART (Fieldcomm Group™ certified), Modbus, 0-1kHz frequency/pulse and a USB port are all included, standard. Optionally available are Foundation Fieldbus and Profibus-PA bus communications.
A large colour touch-screen LCD readout provides comprehensive process information to users with both analog and digital displays of flow rate, temperature and totalized flow, a user time-base selectable strip-chart of flow rate and sensor status diagnostics. The transmitter’s corrosion resistant stainless steel enclosure carries a NEMA 4X/IP64 rating.
MT100 Series electronics also include a user programmable data logger feature to which flow rate, temperature and totalized flow as well as fault codes can be recorded on a removable, 8GB microSD card. The instrument also features a calibration drift check, which can be initiated on user demand or programmed to run automatically.
All MT100 Series Flow Meters have been independently tested and verified to meet and comply with IEC safety directives for EMC and LVD, and carry the CE marking. Optionally available for process installations with hazardous, potentially explosive gases and/or dust, MT100 meters can be ordered with FM/FMc, ATEX or IECEx agency approvals for Division II/Zone 2.
(Fluid Components International)
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