Document ID: chunk:federal_register_of_legislation:F2005L03375:front:0:p8
Version: federal_register_of_legislation:F2005L03375
Segment Type: other
Provision Reference: 
Character Range: 18512–21905

30 oC if above 30 oC.

    3.                    Supplemental Emissions Test Smoke Measurements
    Supplemental emission tests may use steady-state or transient smoke measurements.  Steady-state smoke measurements may be conducted using opacimeters or filter-type smokemeters.  Opacimeter types include partial-flow and full-flow.  Only full-flow opacimeters may be used to measure smoke during transient conditions.
    3.1                For steady-state or transient smoke testing using full-flow opacimeters, equipment meeting the requirements of CFR 40, Part 86, subpart I "Emission Regulations for New Diesel Heavy-Duty Engines; Smoke Exhaust Test Procedure or ISO/DIS-11614 "Reciprocating internal combustion compression-ignition engines -Apparatus for measurement of the opacity and for determination of the light absorption coefficient of exhaust gas" is recommended.
    3.1.1           All full-flow opacimeter measurements shall be reported as the equivalent percent opacity for a 12.7 cm effective optical path length using the Beer-Lambert relationship.
    3.1.2           Zero and full-scale (100% opacity) span shall be adjusted prior to testing.
    3.1.3           Post test zero and full scale span checks shall be performed.  For valid tests, zero and span drift between the pre-test and post-test checks shall be less than 2% of full scale.
    3.1.4           Opacimeter calibration and linearity checks shall be performed using manufacturer's recommendations or good engineering practice.
    3.2                For steady-state testing using filter-type smokemeter, equipment meeting the requirements of ISO-8178-3 and ISO/FDIS-10054 "Internal combustion compression-ignition engines – Measurement apparatus for smoke from engines operating under steady-state conditions – Filter-type smokemeter" is recommended.
    3.2.1           All filter-type smokemeter results shall be reported as a filter smoke number (FSN) that is similar to the Bosch smoke number (BSN) scale.
    3.2.2           Filter-type smokemeters shall be calibrated every 90 days using manufacturer's recommended practices or good engineering practice.
    3.3                For steady-state testing using partial-flow opacimeter, equipment meeting the requirements of ISO-8178- 3 and ISO/DIS-11614 is recommended.
    3.3.1           All partial-flow opacimeter measurements shall be reported as the equivalent percent opacity for a 12.7 cm effective optical path length using the Beer-Lambert relationship.
    3.3.2           Zero and full scale (100% opacity) span shall be adjusted prior to testing.
    3.3.3           Post test zero and full scale span checks shall be performed. For valid tests, zero and span drift between the pre-test and post-test checks shall be less than 2% of full scale.
    3.3.4           Opacimeter calibration and linearity checks shall be performed using manufacturer's recommendations or good engineering practice.
    3.4                Replicate smoke tests may be run to improve confidence in single test or stabilization. If replicate tests are run, 3 additional valid test will be run, and the final reported test results must be the average of all the valid tests.
    3.5                A minimum of 30 seconds sampling time will be used for average transient smoke measurements.

    [2] LMB means a LHDDE or MHDDE, or any HHDDE offered for sale or