24/01/2020 NOx gas is empty. (Cylinder Number D335313)

27/02/2020 New Cylinder quote requested : AMLQ12172

13/03/2020 12:15 - 13:35 Nitrogen Cylinder installed (Cylinder No D115884 NO 435ppb, Nox 436ppb, +/-22ppb, Press 2800).

See Airmonitors Engineer report :

https://github.com/urbanobservatory/deployments/blob/master/Precision%20Station%20Reports/COMMERCIAL_UNION/MB13032020_Newcastle%20Uni_Commercial%20House_Commissioning%20NO%20cyl.xls

Because of leak and unreliable autospanning , autospan was taken off. Manual spans are required.