AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Development and Validation of an Isokinetic Calibration System for Cross Correlation of Differing Aerosol Measurement Methodologies
WENDY MERKLEY, Michael Wojcik, Randy Martin, Kori Moore, Utah State University
Abstract Number: 357 Working Group: Instrumentation and Methods
Abstract A multi-port calibration fixture for the cross calibration of aerosol point sensors has been developed. The system was designed for comparative calibrations of instruments using differing measurement methodologies such as optical particle counters, aerodynamic impactors, etc. Four isokinetic sampling ports are attached to a laminar flow plenum such that all four sampling ports sample identical aerosol concentrations under identical flow conditions. Correlation and correction factors are applied to each instrument, thus a standard methodology can be applied to inter-compare and calibrate aerosol sensing instrumentation and/or to characterize the microphysical properties of a test aerosol. The performance of this fixture has been demonstrated with a TSI 3321 APS, a GRIMM 1.109 and a MetOne OPC.