Evidence for change
ERROR COAST RD Precision Station : Data Error (NOx))
01 July 2023 - 04 July 2023
01/07/2023 22:15 Nox Analyser readings dropped to almost zero. Investigation needed.
04/07/2023 10:00 Investifgation showed High Chamber Pressuer alarm (690mmHg, max 300), Low flow alarm (zero) and low Ozonator alarm (0). Checked external pump - no suction, likely pump failure.
04/07/2023 14:15 Acoem engineer was in area and had a replacement pump (Thomass pump) has swapped this out and readings resumed.
TODO Engineers report : see Urban Observatory Github :
Data during this period will be inaccurate and should be ignored.