(a) Ambient temperature cycle for the diurnal emission portion of the evaporative emission test (see § 86.133).
Table I—Temperature Versus Time Sequence
| Use linear interpolation between hourly temperatures
|
|---|
| Time (min)
| Temp. (°F)
| Time (min)
| Temp. (°F)
| Time (min)
| Temp. (°F)
|
|---|
| 0 | 72.0 | 60 | 72.5 | 120 | 75.5
|
| 180 | 80.3 | 240 | 85.2 | 300 | 89.4
|
| 360 | 93.1 | 420 | 95.1 | 480 | 95.8
|
| 540 | 96.0 | 600 | 95.5 | 660 | 94.1
|
| 720 | 91.7 | 780 | 88.6 | 840 | 85.5
|
| 900 | 82.8 | 960 | 80.9 | 1020 | 79.0
|
| 1080 | 77.2 | 1140 | 75.8 | 1200 | 74.7
|
| 1260 | 73.9 | 1320 | 73.3 | 1380 | 72.6
|
| 1440 | 72.0 | 1500 | 72.5 | 1560 | 75.5
|
| 1620 | 80.3 | 1680 | 85.2 | 1740 | 89.4
|
| 1800 | 93.1 | 1860 | 95.1 | 1920 | 95.8
|
| 1980 | 96.0 | 2040 | 95.5 | 2100 | 94.1
|
| 2160 | 91.7 | 2220 | 88.6 | 2280 | 85.5
|
| 2340 | 82.8 | 2400 | 80.9 | 2460 | 79.0
|
| 2520 | 77.2 | 2580 | 75.8 | 2640 | 74.7
|
| 2700 | 73.9 | 2760 | 73.3 | 2820 | 72.6
|
| 2880 | 72.0 | 2940 | 72.5 | 3000 | 75.5
|
| 3060 | 80.3 | 3120 | 85.2 | 3180 | 89.4
|
| 3240 | 93.1 | 3300 | 95.1 | 3360 | 95.8
|
| 3420 | 96.0 | 3480 | 95.5 | 3540 | 94.1
|
| 3600 | 91.7 | 3660 | 88.6 | 3720 | 85.5
|
| 3780 | 82.8 | 3840 | 80.9 | 3900 | 79.0
|
| 3960 | 77.2 | 4020 | 75.8 | 4080 | 74.7
|
| 4140 | 73.9 | 4200 | 73.3 | 4260 | 72.6
|
| 4320 | 72.9 | | | | |