MAO/ACSM/S1 - Noisy signal

At the end of February transient noise began to appear in the signal. This was not 
immediately apparent and was not detected until July 2015 when the noise suddenly stopped. It is 
apparent that the noise is periodic and probably electrical. Please see  
Document  for the details.

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• Mass concentration of ammonium, ambient aerosol in air(ammonium)
• Mass concentration of sulfate, ambient aerosol in air.(sulfate)
• Mass concentration of nitrate, ambient aerosol in air(nitrate)
• Mass concentration of total organics, ambient aerosol in air(total_organics)
• Mass concentration of chloride, ambient aerosol in air.(chloride)