Observations on the Use of the FTS (Filter Test System) 400.
Abstract
This note contains remarks on the use of the FTS 400, a system designed by TSI Inc. to meet DREO requirements in filter testing. Production of Aerosol: In the range 0.01 - 0.30 micrometer diameter, polydisperse aerosols are produced by atomizing and drying solutions of sodium chloride in water or dioctyl phthalate in isopropanol. The electrostatic classifier selects a narrowly defined size in the range quoted above, which is then employed as the challenge. While the classifier is capable, operating as a standalone instrument, of selecting out particles as large as 1.0 micrometer, operational compromises in the FTS system, related probably to air flow through the classifier, limit the upper size to 0.31 micrometer. For particle size greater than 0.5 micrometers, the aerosol source is aqueous suspensions of monodisperse (very uniformly sized) polystyrene latex spheres (PSL), stored in the 9302 angstrom atomizers of Figure 1. A suspension is dried and diluted and passed through the test object. For reasons given below the APS and not the CNC must be used as the count instrument. Keyword: Canada.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1987
- Accession Number
- ADA190158
Entities
People
- J. R. Coleman
Organizations
- Defence Research and Development Canada