Precision Station LSO visit, zeroed and filters

Issue with CO Analyzer reading very erratically, in negative 20,000+. Motor Speed fluctuating down to 75% - reported to AirMonitors for fixing

See Github https://github.com/urbanobservatory/deployments/blob/master/Precision%20Station%20Reports/COAST_RD/LSO_Calibration_Sheet_v1.17_BV_COAST_ROAD_20181004.xlsx