Are orifice, venturi, and nozzle flow meters required to have temperature, and total pressure transmitters located on the flowmeters?
For orifice, nozzle and venturi flow meters, the use of representative values for temperature and total pressure is allowed in situations where there are no existing transmitters to measure these parameters at the flow meter location. Rather than requiring additional transmitters to be installed and calibrated in close proximity to the flow meter, reporters shall apply suitable correction factors to temperature and/or total pressure readings made at a remote location (or locations), to represent conditions at the flow meter. For a unit that operates continuously with infrequent outages and will not be able to meet the April 1, 2010 deadline for the initial calibration of a Tier 3 fuel flow meter, does the facility have to request an extension from EPA? No. According to ยงยง98.3(i)(6) and 98.34(b)(1)(v), the owner or operator may postpone the initial calibration until the next scheduled maintenance outage in such cases. Such postponements shall be documented in the monitoring plan that is
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