Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p26
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 26/150)
Character Range: 786815–789977

efficiency of polydisperse alcane (decane or higher) or emery oil with count median diameter > 50 nm and an inlet concentration of ≥ 5 × 106 particles per cubic centimetre at the minimum dilution (equivalent mass > 1 mg/m3).

              A.2.2.5.4.3. The volatile removal efficiency with tetracontane and/or polydisperse alcane or oil need to be proven only once for the PEMS family. A PEMS family is considered to be a group of instruments with the same analysers, sample and thermal conditioning and software compensation algorithms. The instrument manufacturer shall provide the maintenance or replacement interval that ensures that the removal efficiency does not drop below the technical requirements. If such information is not provided by the instrument manufacturer, the volatile removal efficiency shall be checked yearly for each instrument.

A.2.3. Auxiliary equipment
A.2.3.1. Exhaust Gas Flow Meter (EFM) tailpipe connection
               The installation of the EFM shall not increase the backpressure by more than the value recommended by the engine manufacturer, nor increase the length of the tailpipe by more than 2 m. As for the all the components of the PEMS equipment, the installation of the EFM shall comply with the locally applicable road safety regulations and insurance requirements.
              A.2.3.2. PEMS location and mounting hardware
              The PEMS equipment shall be installed as specified in paragraph A.1.2.4. of Appendix 1 to this annex.
              A.2.3.3. Electrical power
              The PEMS equipment shall be powered using the method described in paragraph 4.6.6. of this annex.

                  Annex 8 ‑ Appendix 3 Calibration of portable measurement equipment
A.3.1. Equipment calibration and verification
              A.3.1.1. Calibration gases
              The PEMS gas analysers shall be calibrated using gases meeting the requirements as set out in paragraph 9.3.3. of Annex 4.
              A.3.1.2. Leakage test
              The PEMS leakage tests shall be conducted following the requirements defined in paragraph 9.3.4. of Annex 4.
              A.3.1.3. Response time check of the analytical system
              The response time check of the PEMS analytical system shall be conducted in accordance with the requirements set out in paragraph 9.3.5. of Annex 4.
              A.3.1.4. PM number analyser calibration and verification

              A.3.1.4.1. The PEMS leakage test shall be conducted either in accordance with the requirements set out in paragraph 9.3.4. of Annex 4 or in accordance with the instrument manufacturer's instructions.

              A.3.1.4.2. The response time check of the PM number analyser shall be conducted in accordance with the requirements set out in paragraph 9.3.5. of Annex 4 using particles if gases cannot be used.

              A.3.1.4.3. The transformation time of the PM number analyser system and its sampling line, shall be determined in accordance with paragraph A.8.1.3.7. of Appendix 8 to Annex 4. "Transformation time" means the time difference between a change of concentration at the reference point and a system response of