N.Y. Comp. Codes R. & Regs. Tit. 6 §§ 217-5.6

Current through Register Vol. 46, No. 50, December 11, 2024

Section 217-5.6 - Test equipment specifications and test procedures

All test equipment and procedures shall, at minimum, comply with SAE J1667 test procedures unless otherwise noted herein.

(a) A smokemeter used to measure smoke opacity in the exhaust emissions of a HDDV pursuant to this Subpart shall:

(1) be a manufacturer's model certified by NYSDEC as having satisfactorily demonstrated an acceptable ability to comply with the recommended test standard contained in SAE J1667;

(2) at a minimum, have the ability to measure, where appropriate, and print out the following:

(i) the smoke opacity value for each snap idle test in sequence;

(ii) the final test result, in percent opacity;

(iii) the engine oil temperature;

(iv) the engine RPM at high idle for each snap;

(v) the inspection date, time and location;

(vi) the name and certification number of the certified inspector;

(vii) the exhaust pipe diameter or engine horsepower;

(viii) the smoke opacity standard;

(ix) pass or fail of test results compared to appropriate smoke opacity standard;

(x) the HDDV registrant or operator name and license plate number and state of issuance;

(xi) the vehicle identification number (VIN); and

(xii) the engine model year.

(3) The smokemeter shall be capable of:

(i) retaining data pertaining to the previous 40 tests and outputting data via an RS-232 connector; and

(ii) multiple printouts of parameters specified in paragraph (2) of this subdivision.

(b) The testing procedures for the snap acceleration smoke opacity test, required in accordance with this subdivision, shall be performed on HDDVs as follows:

(1) Determine the engine horsepower from the engine identification plate or engine serial number. Refer to Table 2 of this Subpart and input the nominal stack size into the smokemeter. If the engine identification plate is missing, inaccessible or illegible, measure the outside diameter of the exhaust pipe extending from the exhaust manifold with a precision caliper or equivalent gauge, rounding to the nearest inch.

(2) During an annual emissions inspection only, performed at an ODEIS:

(i) affix the RPM sensor to the engine of the vehicle according to the instructions of the smokemeter manufacturer;

(ii) insert the engine oil temperature sensor into the oil dipstick tube and into the crankcase oil according to the instructions of the smokemeter manufacturer; and

(iii) connect the engine RPM and oil temperature sensors to the smokemeter according to the instructions of the smokemeter manufacturer.

(3) Affix the smokemeter according to the instructions of the manufacturer to the end of the exhaust pipe of the vehicle. For full-flow smokemeters, ensure that the final two feet and the exit of exhaust pipe is straight, with an internal diameter not to exceed five inches. Appropriate exhaust pipe adapters shall be used as necessary to comply with these specifications. Do not use full-flow smokemeters on vehicles with underbody exhaust pipes which direct the exhaust flow to the ground unless the exhaust gases are redirected away from the ground by the appropriate exhaust pipe adaptor mentioned above.

(4) Ensure that the vehicle is restrained to prevent the vehicle from moving during the test.

(5) Ensure that the smokemeter is warmed up and calibrated according to the instructions of the manufacturer. Initiate the test sequence on the smokemeter.

(6) Select the appropriate smoke opacity pass/fail standards, set forth at Table 1 of the Subpart, based upon the engine model year. If using a full-flow smokemeter, enter the engine horsepower and stack diameter as measured from the vehicle exhaust stack.

(7) If using a smokemeter without horsepower input, select the appropriate stack size from Table 2 of this Subpart, based upon the engine horsepower of the vehicle.

(8) With each prompt from the smokemeter to accelerate engine, ensure the accelerator pedal is rapidly depressed to the floor and held there until prompted by the smokemeter to release the pedal. For those vehicles with electronic engine controls, engine diagnostic equipment should be used to allow acceleration to governed speed.

(9) Repeat procedures described in paragraph (8) of this subdivision at least four more times. This shall include, at a minimum, two preliminary snap accelerations to remove loose soot from the exhaust system for a stabilized reading, and a minimum of three snap accelerations for the official test, the average of which shall constitute the final test result.

(10) The pass/fail determination shall be based upon three valid smoke opacity test results averaged arithmetically and compared to the pass/fail standards appropriate for the engine model year.

(11) Issue a printout including the items listed in paragraph (a)(2) of this section.

Table 2

Engine Horsepower Rating vs. Nominal Stack Size

Manufacturer's rated horsepower	Nominal stack size in inches
Less than 101	2
101-200	3
201-300	4
301 and over	5

(c) A smokemeter used to measure smoke opacity in the exhaust emissions of a HDDV during a roadside emissions or NYSDOT bus inspection does not need to include the following specifications:

(1) an engine oil temperature sensor; and

(2) an engine RPM sensor.

N.Y. Comp. Codes R. & Regs. Tit. 6 §§ 217-5.6