When the NOX sensor is mounted for the first time at the installation location and each time the NOX sensor is replaced, the NO2/NOX ratio (correction factor K) in the exhaust gas must be determined at the mounting position of the sensing element. Use a suitable calibrated exhaust gas analyzer and determine the concentration of nitrogen dioxide (NO2) and nitrogen oxide (NOX) at the sensing element's mounting position. The correction factor K results from the following equation:
When configuring the EasyNOₓ, enter this value in the NOX Setup view of the respective NOX monitor (see section Preferences).
Always determine the NO2/NOX ratio before screwing the sensing element in for the first time and avoid repeatedly screwing the sensing element in and out. Also follow the instructions in the section Mounting the Sensing Element of NOₓ Sensor P/N 56.03.003Mounting the Sensing Element of NOₓ Sensor P/N 56.03.003Mounting the Sensing Element of NOₓ Sensor P/N 56.03.003 when mounting the NOX sensor for the first time and the instructions in the section Replacing the NOₓ Sensor when replacing the NOX sensor.