a) The on-road remote sensing test equipment shall consist of the following:
- 1) An infrared SDM capable of measuring the concentration of HC, CO, and CO2 present in an in-use vehicle;
- 2) A camera system that automatically photographs vehicle license plates;
- 3) A system that links each emission record to the correct vehicle license plate photograph; and
- 4) A laser based speed and acceleration measurement system.
b) The Infrared SDM shall be of a design certified to meet the following accuracy requirements:
| Pollutant | Range | Accuracy |
| | |
| HC | ALL | ±150 ppm or ±15 percent of expected HC Concentration |
| | |
| CO | ≤ 3.0 percent | ±10 percent or 0.25 percent (Whichever is greater) |
| | |
| > 3.0 percent | ±15 percent |
- c) The speed and acceleration measurement system shall be of a design certified to measure vehicle speed to within ±0.5 miles per hour and vehicle acceleration to within ±0.3 miles per hour per second at the moment exhaust is measured.
(Source: Amended at 35 Ill. Reg. 11268, effective June 28, 2011)