Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 276 - PROCEDURES TO BE FOLLOWED IN THE PERFORMANCE OF INSPECTIONS OF MOTOR VEHICLE EMISSIONS
Subpart F - EQUIPMENT MAINTENANCE AND CALIBRATION
Section 276.606 - On-Road Remote Sensing Test Systems Maintenance and Calibration

Universal Citation: 35 IL Admin Code ยง 276.606

Current through Register Vol. 48, No. 12, March 22, 2024

a) All equipment utilized for on-road remote sensing emission measurement shall be maintained and calibrated according to the manufacturer's specifications.

b) The accuracy of the Infrared SDM shall be verified by measuring the concentration of tri-blend (CO2, HC, CO) calibration gas released from a specially modified vehicle. A two point gas calibration procedure shall be followed. The span shall be accomplished at the following pair of span points:

300 - ppm propane (HC)

1.0 - percent CO

6.0 - percent CO2

1200 - ppm propane (HC)

4.0 - percent CO

12.0 - percent CO2

The Infrared SDM shall measure the span gas within the allowable tolerance range specified in Section 276.507(b) of this Part.

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