Generation of nano-scale test aerosols from graphite, silver (Ag), gold (Au), copper (Cu), etc. through condensation; Carrier gas: Nitrogen
Particle measurement devices should be calibrated using particles with characteristics, e.g. shape, size, density, surface condition, and refractive index, that are similar to those of the actual aerosol to be tested, e.g. diesel soot. The new DNP digital 2000 generates a condensation aerosol from monolithic graphite. The resulting carbon agglomerates are similar to diesel soot with respect to particle size distribution. The particle measurement program (PMP) recommends that the particle size be adjusted to 30 nm, 50 nm, and 100 nm for calibration of the complete measurement chain. The 30 nm, 50 nm, and 100 nm particle fractions are able to be classified with a DEMC (differential electro mobility classifier) based on the particle spectrum provided by the DNP digital 2000. The DNP digital 2000 is able to quickly, reliably, and reproducibly determine the transmission behavior/function of a particle measurement chain, e.g. the PMP measurement chain, and individual components also at corresponding temperatures of up to 400 °C.