5 Colo. Code Regs. § 1001-15-B-II

Current through Register Vol. 47, No. 18, September 25, 2024

Section 5 CCR 1001-15-B-II - Test Equipment Requirements

Standards and procedures for the operation, adjustment, calibration and certification of the Division-approved smoke opacity meters, chassis dynamometers, and other required equipment in the performance of diesel opacity inspections for the Diesel Opacity Inspection Program.

II.A. Approval of Required Test Equipment

Diesel opacity inspection required by the Diesel Opacity Inspection Program shall not be performed unless the equipment used meets the specifications of the Colorado Diesel Opacity Inspection Program as defined in this regulation and as approved by the Division. Opacity meters, chassis dynamometers, photo tachometers and strip chart recorders must be approved by the Division. A manufacturer requesting the approval of an instrument for use in Colorado's Diesel Opacity Inspection Program shall make application thereof on forms provided thereby, and sources of vendors for the qualifying instruments may be obtained from the Program Administrator, Mobile Sources Section, Air Pollution Control Division, Colorado Department of Public Health and Environment, 4300 South Cherry Creek Drive, Denver, CO, 80246.

II.B. Running Changes and Equipment Updates

Any changes to design or performance characteristics of components' specifications which may affect equipment or instrument performance must be approved by the Commission. It will be the instrument manufacturer's responsibility to confirm that such changes have no detrimental effect on opacity meter or other equipment or instrument performance. All equipment and instruments used in Colorado's Diesel Opacity Inspection Program will be updated as needed and specified in revisions to Commission Regulation Number 12.

II.C. Opacity Meter

Every licensed station shall have on the premises an approved portable opacity meter meeting specifications to conduct opacity tests for the Diesel Opacity Inspection Program. Only opacity meters approved by the Division shall be used for opacity inspections in the Diesel Opacity Inspection program.

The opacity meter is to be portable in design and function with an emphasis on compactness and light weight. The instrument will consist of two major, separate components connected by an interconnecting cable. The major components are the stack monitor/sensor and the control/indicator unit.

II.C.1. Opacity Meter Specifications

II.C.1.a. Stack Monitor/Sensor

II.C.1.a.i. Must be adaptable by means of a quick connect device, to exhaust piping and outlets having outside diameters from two to six inches.

II.C.1.a.ii. Light Source: Light emitting diode (LED), pulsed green light.

II.C.1.a.iii. Light Detector: Silicon photo detector.

II.C.1.a.iv. Provide for in line continuous measurement of exhaust opacity.

II.C.1.b. Control/Indicator Unit

II.C.1.b.i. Meter Display

II.C.1.b.i.A. Range: 0-100 percent opacity

II.C.1.b.i.B. Accuracy

II.C.1.b.i.C. Digital read-out; Plus or minus two percent of full scale

II.C.1.b.i.D. Drift: Less than 2.5% per hour

II.C.1.b.i.E. Response time: Less than two seconds from 0-100% of scale

II.C.1.b.i.F Peak Hold Feature

II.C.1.b.ii. Warm-up time: Not to exceed ten minutes

II.C.1.b.iii. Operating temperature range: 35°-120°F.

II.C.1.b.iv. Integrated with a chart recorder/digital recording device and/or provide for a linear 0-1 VDC OR 0-10 VDC output signal.

II.C.1.b.v. Power Requirements

II.C.1.b.v.A. 115 Volts AC input

II.C.1.b.v.B. Internal replaceable or rechargeable batteries allowing for operation independent of AC input.

II.C.1.b.vi. Connecting Cable

II.C.1.b.vi.A. Heat and abrasion resistant

II.C.1.b.vii. Calibration: Opacity meters must be calibration checked weekly. Calibration results must be entered into the inspection software provided by the Department or Division.

II.C.2. Opacity meters meeting all SAE J1667 specifications shall be considered equivalent to the above Division specification.

II.D. Dynamometer Specifications and Criteria

II.D.1. Light-duty Dynamometers

II.D.1.a. Capacity: A minimum requirement is the capacity to absorb up to 180 horsepower at speeds between 50 and 80 miles per hour (mph), capable of accommodating vehicles with individual axle loads up to 5, 000 lbs.

II.D.1.b. Rolls: Minimum roll diameter is 8.5 inches.

II.D.1.c. Load and Speed Control

II.D.1.c.i. Infinitely variable throughout the load and speed range from no-load to full-load. Reference the dynamometer's "performance envelope" or power absorption capacity curve.

II.D.1.c.ii. Ability to set a load or speed and until deactivated, maintain that preset setting without additional input from the load controller.

II.D.1.d. Instrumentation: Interfaced, calibrated horsepower and road speed indicators located in such a manner to be readily visible and discernible by the operator of the vehicle under test.

II.D.1.e. Calibration:

II.D.1.e.i. Provision for field checking the accuracy of the dynamometer's calibration including the electrical output signal, interface and attendant instrumentation.

II.D.1.e.ii. Availability of manufacturer's recommended/ specified equipment, tools and procedures for the field calibration and adjustment of the dynamometer.

II.D.2. Heavy-duty Dynamometers

II.D.2.a. Capacity: A minimum requirement is the capability to absorb a minimum of 400 horsepower at speeds between 50 and 80 mph. Capable of accommodating vehicles with individual axle loads up to 22,000 lbs.

II.D.2.b. Rolls:

II.D.2.b.i. Minimum roll diameter: 8.5 in.

II.D.2.b.ii. Tandem axle capability to accommodate, at a minimum, vehicle inter-axle spacing of 48 to 58 inches.

II.D.2.c. Load and Speed Control:

II.D.2.c.i. Infinitely variable throughout the load and speed range from no-load to full-load. Reference the dynamometer's "performance envelope" or power absorption capacity curve.

II.D.2.c.ii. Ability to set a load or speed and until deactivated, maintain that preset setting without additional input from the load controller.

II.D.2.d. Instrumentation: Interfaced, calibrated horsepower and road speed indicators located in such a manner to be readily readable and discernible by the operator of the vehicle under test.

II.D.2.e. Calibration:

II.D.2.e.i Provision for field checking the accuracy of the dynamometer's calibration including the electrical output signal, interface and attendant instrumentation.

II.D.2.e.ii. Availability of manufacturer's recommended/ specified equipment, tools, and procedures for the field calibration and adjustment of dynamometer.

II.E. Other Required Equipment for Diesel Opacity Inspection Stations.

II.E.1. Photo tachometer (Heavy-Duty Vehicle Inspection Stations Only)

Every heavy-duty diesel vehicle inspection station shall have a photo tachometer capable of sensing a vehicle's engine rpm and digitally displaying that rpm in the vehicle operator's compartment. This tachometer must be capable of measuring rpm from 0-6000 rpm with an accuracy of plus or minus five rpm or better. For heavy-duty on-road testing stations this unit must be of portable design with the readout capable of being read from the vehicle's cab, and must be easily interfaced with the strip chart recorder.

II.E.2. Stripchart Recorders/Digital Recording Devices (Heavy-duty On-Road Inspection Stations Only)

In those instances where on-road opacity testing will be utilized, stripchart recorders/digital recording devices shall be used in order to accurately monitor and analyze the test sequence.

Description of an approved stripchart recorder/digital recording device is as follows:

II.E.2.a. Recorder capable of accurately recording data in a moving heavy-duty vehicle.

II.E.2.b. Unit is to be powered by internal batteries (rechargeable or non-rechargeable) or 12 VDC external sources. A 115 VAC, 60 Hz, unit powered by means of a DC/AC inverter is also acceptable.

II.E.2.c. A minimum of two channels for recording 1) exhaust opacity and, 2) engine speed (rpm).

II.E.2.d. A recorder chart/display speed of approximately four to eight inches/min. (10 to 20 cm/min).

II.E.2.e. A minimum chart paper/display width of three inches.

II.E.3. Certified Neutral Density Filters.

Two neutral density filters, certified and calibrated by the Division, must be kept by each diesel testing station for weekly calibration checks of the opacity meter. The results of the calibration checks of each approved opacity meter must be entered into the inspection software provided by the Division and made available to Department of Revenue Air Environmental Systems Technicians upon request during station inspections.

II.E.4. Certified Thermometer

For use in the Diesel Opacity Inspection Program, the thermometer must be a laboratory grade ambient temperature measuring device with a range of at least 20°F (twenty degrees) through 120°F (one-hundred-twenty degrees) and an attested accuracy of at least plus or minus 1° (one degree) Fahrenheit with increments of one degree, with protective shielding, and approved by the Department of Revenue.

II.E.5. Safety Restraint Equipment

Adequate safety restraint equipment for all dynamometer test stations is required. Restraint equipment must be capable of restraining the type of vehicles tested at that station. Equipment may be chains, fabric tie-down straps, wheel chocks, as appropriate and as approved upon licensing.

II.E.6. Hearing ear protectors, as needed.

II.E.7. Auxiliary engine cooling fan.

Light-duty inspection stations are required to have available on premises and for use during opacity inspections, an auxiliary engine cooling fan which meets the following minimum specifications:

Guarded fan complying with OSHA regulations.

CFM free air delivery of 3200 CFM

Fan diameter of 24 inches.

1/4 H.P. motor.

II.E.8. Exhaust gas removal equipment.

If a closed exhaust system is utilized, the pressure within the system shall be maintained between 4 inches H2O positive pressure and 2 inches H2O negative pressure at all times when any given vehicle is undergoing opacity testing.

II.E.9. Required reference materials, including a Division-approved current emissions control systems application guide.

II.E.10. Basic hand tools necessary to perform inspection.

5 CCR 1001-15-B-II

39 CR 18, September 25, 2016, effective 10/15/2016

41 CR 21, November 10, 2018, effective 11/30/2018