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3-4 Measurement Variable Instrument Type / Instrument Measurement Accuracy Completeness Fuel Input Gas Temperature RTD / Rosemount Series 68 o -58to752 F o 50to100 F ± 0.10% reading Instrument calibration from manufacturer prior to testing Extended test: 99.9 % of one- minute readings for 14 days. Exhaust Stack Emissions THC and CH4 levels FID / TEI Model 51, HP 5890 for CH4 0 to 2 ppmv full load, 29 to 525 ppmvd reduced loads ± 5%FSor ± 2%FSor ≤0.6%FSd THC,±2.4% CH4 Calculated following EPA Reference Method calibrations (Before and after each test run) Controlled tests: three valid runs per load. Controlled tests: three valid runs per load. Gas Flow Rate Gas Pressure Mass Flow Meter / Rosemount 3095 w/ 1195 orifice 0 to 20 scfm 0 to 100 psia 0 to 15 scfm 18 to 20 psia 1.0% of reading ± 1.0% of reading Factory calibration of differential pressure sensor and orifice plate bore Controlled tests: three valid runs per load meeting PTC 22 criteria. Extended test: 90 % of one- minute readings for 14 days. Controlled tests: six valid runs at each load. LHV Gas Chromatograph / HP 589011 0 to 100% CH4 NOX Levels CO Levels Chemiluminescent/ TEI Model 42 0 to 25 ppmvd 1 to 3 ppmvd ± 2%FSor ± 2%FSor ≤0.9%FSd CO2 Levels O2 Levels NDIR / IR Model 703 NDIR / IR Model 2200 0 to 10% 0 to 25% 1.1 to 1.8% 17 to 19% ± 2%FSor ≤1.1%FSd ≤0.6%FSd Rosemount Model 3095 ± 0.75% FS ± 0.75% FS ± 0.09% reading NDIR / TEI Model 48 0 to 25 ppmvd full load, 0 to 1,000 ppmvd reduced loads 0 to 18 ppmv full load, 0 to 500 ppmvd reduced loads 1 to 3 ppmvd full load, 70 to 257 ppmvd reduced loads ≤0.9%FSd Table 3-2. Summary of Data Quality Indicator Goals and Results (continued) Manufacturer Range Range Goal Actual Observed How Verified / Determined Goal Actual a Accuracy goal represents the maximum error expected at the operating range. It is defined as the sum of instrument and sampling errors. b Includes instrument, 1.0% current transformer (CT), and 1.0% potential transformer (PT) errors. c FS: full scale d Values represent the maximum system bias observed throughout the controlled test periods. 95 to 96% CH4 ± 3.0% accuracy, ± 0.2% repeatability ± 0.5% accuracy, ± 0.2% repeatability Duplicate analysis of NIST-traceable CH4 audit gas controlled tests: two valid samples per day Controlled tests: two valid samples per day 3 901 to 906 Btu/ft 0.1% repeatability ± 0.04% repeatability Conducted duplicate analyses on 2 samples 3-4 SRI/USEPA-GHG-VR-27 September 2003PDF Image | Environmental Technology Verification Report
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