Document ID: chunk:federal_register_of_legislation:F2024L00446:reg:16:p65
Version: federal_register_of_legislation:F2024L00446
Segment Type: reg
Provision Reference: reg 16 (pt 65/108)
Character Range: 1070046–1073137

checked with a calibrated flow meter. Here the term 'nominal flow rate' refers to the flow rate stated in the last calibration for the PNC by the instrument manufacturer.
              5.8. Accuracy of the mixing device
              In the case that a gas divider is used to perform the calibrations as defined in paragraph 5.2. of this annex, the accuracy of the mixing device shall be such that the concentrations of the diluted calibration gases may be determined to within ±2 per cent. A calibration curve shall be verified by a mid-span check as described in paragraph 5.3. of this annex. A calibration gas with a concentration below 50 per cent of the analyser range shall be within 2 per cent of its certified concentration.
              6. Reference gases
              For Level 1B only:
              In the case that gases within the following tolerance of the stated value are not available in the Japan Calibration Service System (JCSS), a gas with a wider, but most tight, tolerance available in the JCSS may be used.
              6.1. Pure gases
              6.1.1. All values in ppm mean volume-ppm (vpm)
              6.1.2. The following pure gases shall be available, if necessary, for calibration and operation:
              6.1.2.1. Nitrogen:
              Purity: ≤1 ppm C1, ≤1 ppm CO, ≤400 ppm CO2, ≤0.1 ppm NO, ≤0.1 ppm N2O, ≤0.1 ppm NH3.
              6.1.2.2. Synthetic air:
              Purity: ≤1 ppm C1, ≤1 ppm CO, ≤400 ppm CO2, ≤0.1 ppm NO, ≤0.1 ppm NO2; oxygen content between 18 and 21 per cent volume.
              6.1.2.3. Oxygen:
              Purity: > 99.5 per cent vol. O2.
              6.1.2.4. Hydrogen (and mixture containing helium or nitrogen):
              Purity: ≤1 ppm C1, ≤400 ppm CO2; hydrogen content between 39 and 41 per cent volume.
              6.1.2.5. Carbon monoxide:
              Minimum purity 99.5 per cent.
              6.1.2.6. Propane:
              Minimum purity 99.5 per cent.
              6.2. Calibration gases
              The true concentration of a calibration gas shall be within 1 per cent of the stated value or as given below, and shall be traceable to national or international standards.
              Mixtures of gases having the following compositions shall be available with bulk gas specifications according to paragraphs 6.1.2.1. or 6.1.2.2. of this annex:
              (a) C3H8 in synthetic air (see paragraph 6.1.2.2. of this annex);
              (b) CO in nitrogen;
              (c) CO2 in nitrogen;
              (d) CH4 in synthetic air;
                  (e) NO in nitrogen (the amount of NO2 contained in this calibration gas shall not exceed 5 per cent of the NO content).

Annex B6

Type 1 test procedures and test conditions
              1. Description of tests
              1.1. The Type 1 test is used to verify the emissions of gaseous compounds, particulate matter, particle number, CO2 emission, fuel consumption, electric energy consumption and electric ranges over the applicable WLTP test cycle and OBFCM accuracy (where applicable).
              1.1.1. The tests shall