Division 2.6.1 General procedure

The calculations in this section shall be performed to determine if gas analyzer drift invalidates the results of a test interval. If drift does not invalidate the results of a test interval, the test interval's gas analyzer responses shall be corrected for drift in accordance with point 2.6.2. The drift-corrected gas analyzer responses shall be used in all subsequent emission calculations. The acceptable threshold for gas analyzer drift over a test interval is specified in point 8.2.2.2 of Annex VI.

The general test procedure shall follow the provisions specified in Appendix 1 with concentrations x_i or $\bar{x}$ being replaced by concentrations c_i or $\bar{c}$ .