| 4.8.2. |
Calibration and span gases shall contain mixtures of hydrogen (H2) and purified synthetic air. The real concentrations of a calibration gas shall be within ±2 per cent of the nominal values. The accuracy of the diluted gases obtained when using a gas divider shall be within ±2 per cent of the nominal value. The concentrations specified in Appendix 1 may also be obtained by a gas divider using synthetic air as the dilution gas. |
a0c0 |