MAO/PSAP/S1 - Data highly oscillatory
Periods when the flow through the impactor is abnormal and the instrument signal is unacceptably noisy and clearly spurious. It is surmised there was a flow distrubance, but there was no Operator record of events. This period also corresponds with the failure of the Pentras drier. Repeated restarts MAY have affected the instrument output.
Use data with caution