Calibration and operational checks for MPSSs.

MPSS calibration includes:

• the check of the main status parameters (flows, HV, etc.),

• check of the recommended set-up (bipolar charger, sensors - RH/T&p in aerosol and sheath flow, positive polarity HV supply, flow ratio, etc.),

• sizing check (NIST latex particles 203 nm),

• plumbing time check (up- and down-scan),

• check/adjustment of the sheath flow,

• comparison of the particle number size distribution against reference instruments (MPSS and total count CPC) on atmospheric aerosol.

Training of operators for correct set-up and operation and basic maintenance of the MPSSs. 

PACC is a new unit of CAIS-ECAC, but the hosting laboratory at ICPF CAS has a long lasting history in these measurements and is fully harmonized with WCCAP (TROPOS, Leipzig, Germany).