Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p49
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 49/108)
Character Range: 1022126–1025446

propylene to its corresponding concentration of water vapour. The values for conversion shall be periodically checked by the manufacturer of the analyzer, and at least once per year.
              4.1.5. Recommended system descriptions
              4.1.5.1. Figure A5/9 is a schematic drawing of the gaseous emissions sampling system.
Figure A5/9
Full flow exhaust dilution system schematic
    4.1.5.2. Examples of system components are as listed below.
              4.1.5.2.1. Two sampling probes for continuous sampling of the dilution air and of the diluted exhaust gas/air mixture.
              4.1.5.2.2. A filter to extract solid particles from the flows of gas collected for analysis.
              4.1.5.2.3. Pumps and flow controller to ensure constant uniform flow of diluted exhaust gas and dilution air samples taken during the course of the test from sampling probes and flow of the gas samples shall be such that, at the end of each test, the quantity of the samples is sufficient for analysis.
              4.1.5.2.4. Quick-acting valves to divert a constant flow of gas samples into the sample bags or to the outside vent.
              4.1.5.2.5. Gas-tight, quick-lock coupling elements between the quick-acting valves and the sample bags. The coupling shall close automatically on the sampling bag side. As an alternative, other methods of transporting the samples to the analyser may be used (three-way stopcocks, for instance).
              4.1.5.2.6. Bags for collecting samples of the diluted exhaust gas and of the dilution air during the test.
              4.1.5.2.7. A sampling critical flow venturi to take proportional samples of the diluted exhaust gas (CFV-CVS only).
              4.1.5.3. Additional components required for hydrocarbon sampling using a heated flame ionization detector (HFID) as shown in Figure A5/10.
              4.1.5.3.1. Heated sample probe in the dilution tunnel located in the same vertical plane as the particulate and, if applicable, particle sample probes.
              4.1.5.3.2. Heated filter located after the sampling point and before the HFID.
              4.1.5.3.3. Heated selection valves between the zero/calibration gas supplies and the HFID.
              4.1.5.3.4. Means of integrating and recording instantaneous hydrocarbon concentrations.
              4.1.5.3.5. Heated sampling lines and heated components from the heated probe to the HFID.

Figure A5/10
Components required for hydrocarbon sampling using an HFID
              4.2. PM measurement equipment
              4.2.1. Specification
              4.2.1.1. System overview
              4.2.1.1.1. The particulate sampling unit shall consist of a sampling probe (PSP), located in the dilution tunnel, a particle transfer tube (PTT), a filter holder(s) (FH), pump(s), flow rate regulators and measuring units. See Figures A5/11, A5/12 and A5/13.
              4.2.1.1.2. A particle size pre-classifier (PCF), (e.g. cyclone or impactor) may be used. In such case, it is recommended that it be employed upstream of the filter holder.
Figure A5/11
Alternative particulate sampling probe configuration
              4.2.1.2. General requirements
              4.2.1.2.1. The sampling probe for the test gas flow for particulate shall be arranged within the dilution tunnel so that