Table 5.
Summary of sensor calibration equations and reference PM2.5 concentration versus calibrated instrument linear regression equations.
| Instrument | Parameter | Phase I Clean Chamber Testing Calibration Equation |
Phase II Smoke Chamber Testing Calibration Equation |
|---|---|---|---|
| Solver A #1 | PM2.5 | Ref = (3.3855 × Sensor #11.1549) − 19.46; r2 = 0.957 | Ref = (1.3451 × Sensor #1) + (0.0187 × Sensor #12) + 8.52; r2 = 0.936 |
| Solver A #1 | CO | Ref = (1.3749 × Sensor #1) − 1.01; r2 = 0.985 | Ref = (1.2897 × Sensor #1) − 0.19; r2 = 0.991 |
| Solver A #1 | CO2 | Ref = (1.2228 × Sensor #1) − 99.19; r2 = 0.986 | Ref = (0.2868 / Sensor #1) + (0.0010 / Sensor #12) + 165.39; r2 = 0.946 |
| Solver A #1 | O3 | Ref = (2.1683 × Sensor #1) + 6.05; r2 = 0.924 | – |
| Solver A #2 | PM2.5 | Ref = (5.8076 × Sensor #21.0337) − 32.896; r2 = 0.937 | Ref = (2.4324 × Sensor #2) + (0.0132 × Sensor #22) − 13.78; r2 = 0.940 |
| Solver A #2 | CO | Ref = (1.7711 × Sensor #2) − 1.01; r2 = 0.972 | Ref = (1.4075 × Sensor #2) + 0.17; r2 = 0.973 |
| Solver A #2 | CO2 | Ref = (1.2611 × Sensor #2) − 131.80; r2 = 0.987 | Ref = (−3.6716 × Sensor #2) + (0.0040 × Sensor #22) + 1333.91; r2 = 0.875 |
| Solver A #2 | O3 | Ref = (1.3419 × Sensor #2) + 13.81; r2 = 0.905 | |
| Solver B #1 | PM2.5 | Ref = (4.9463 × Sensor #1) + 87.89; r2 = 0.904 | Ref = (2.3247 × Sensor #1) + 135.55; r2 = 0.797 |
| Solver B #1 | CO | Ref = (1.5467 × Sensor #1) − 3.75; r2 = 0.963 | Ref = (1.2993 − Sensor #1) − 4.93; r2 = 0.649 |
| Solver B #1 | CO2 | Ref = (1.8094 × Sensor #1) + 359.69; r2 = 0.964 | Ref = (1.9515 × Sensor #1) + 409.12; r2 = 0.861 |
| Solver B #1 | O3 | Ref = (0.2162 × Sensor #1) + 121.75; r2 = 0.008 | |
| Solver B #2 | PM2.5 | Ref = (2.1353 × Sensor #2) + 43.40; r2 = 0.945 | Ref = (1.6158 × Sensor #2) + 66.05; r2 = 0.811 |
| Solver B #2 | CO | Ref = (1.3269 × Sensor #2) − 2.85; r2 = 0.980 | Ref = (1.2401 × Sensor #2) − 3.88; r2 = 0.858 |
| Solver B #2 | CO2 | Ref = (1.2538 × Sensor #2) + 43.85; r2 = 0.987 | Ref = (1.5560 × Sensor #2) + 21.01; r2 = 0.960 |
| Solver B #2 | O3 | Ref = (0.2981 × Sensor #2) + 111.08; r2 = 0.054 | |
| Solver C #1 | PM2.5 | Ref = (1.2559 × Sensor #1) + 12.57; r2 = 0.951 | |
| Solver C #1 | CO | Ref = (1.6970 × Sensor #1) − 2.17; r2 = 0.979 | – |
| Solver C #1 | O3 | Ref = (1.2837 × Sensor #1) + 16.50; r2 = 0.984 | |
| Solver C #2 | PM2.5 | Ref = (1.3090 × Sensor #2) + 18.79; r2 = 0.944 | |
| Solver C #2 | CO | Ref = (1.3634 × Sensor #2) − 2.18; r2 = 0.978 | – |
| Solver C #2 | O3 | Ref = (1.5432 × Sensor #2) + 12.86; r2 = 0.816 | |
| Solver D #1 | PM2.5 | Ref = (1.7335 × Sensor #1) + 28.63; r2 = 0.956 | Ref = (0.8367 × Sensor #1) + 128.83; r2 = 0.447 |
| Solver D #1 | CO | Ref = (1.3342 × Sensor #1) + 77.40; r2 = 0.731 | Ref = (0.9252 × Sensor #1) − 3.78; r2 = 0.569 |
| Solver D #1 | CO2 | Ref = (9.8540 × Sensor #1) − 364.08; r2 = 0.976 | Ref = (7.5688 × Sensor #1) − 173.40; r2 = 0.565 |
| Solver D #1 | O3 | Ref = (542.6847 × Sensor #1) + 5233.21; r2 = 0.331 | |
| Instrument | Parameter | Phase I Clean Chamber Testing Calibration Equation | Phase II Smoke Chamber Testing Calibration Equation |
| Solver D #2 | PM2.5 | Ref = (2.0810 × Sensor #2) + 12.06; r2 = 0.976 | Ref = (1.0336 × Sensor #2) + 99.56; r2 = 0.533 |
| Solver D #2 | CO | Ref = (0.9059 × Sensor #2) + 18.37; r2 = 0.965 | Ref = (0.2568 × Sensor #2) − 0.52; r2 = 0.710 |
| Solver D #2 | CO2 | Ref = (9.1478 × Sensor #2) − 323.77; r2 = 0.965 | Ref = (3.7927 × Sensor #2) + 179.29; r2 = 0.290 |
| Solver D #2 | O3 | Ref = (−140.9741 × Sensor #2) − 1169.42; r2 = 0.640 | – |
| Solver E #1 | PM2.5 | – | Ref = (1.5545 × Sensor #1) + 74.41; r2 = 0.794 |
| Solver E #1 | CO | – | Ref = (0.3546 × Sensor #1) + 2.21; r2 = 0.280 |
| Solver E #1 | CO2 | – | Ref = (1.1427 × Sensor #1) − 0.26; r2 = 0.985 |
| Solver E #1 | O3 | – | – |