CALIBRATION OF PHOTOMETER-BASED DIRECT-READING AEROSOL MONITORS

Abstract

All photometer-based direct-reading aerosol monitors use the principle of the light scattering to determine airborne particle concentration. Most photometers are calibrated in the factory using a „standard test dust” and are adjusted to agree with respirable dust concentration measurements made using reference gravimetric methods. In practice, it is highly unlikely that the „standard” test dust will exhibit the same physical properties (refractive index, density, particle size distribution, shape) as the airborne particles being measured. In order to obtain an accurate measure of airborne particle concentration, the aerosol monitor should always be compared to a reference gravimetric dust sampler placed alongside and adjusted accordingly. This study conducted controlled experiments to compare the measurements of real-time time photometers with gravimetric mass. Particulate matter source tested was wood-dust generated by handheld sanding operation.

Recommended articles

DIAGNOSTICS AND MAINTENANCE OF MACHINE TOOL SPINDLES- NEW VIEWS

ONDREJ HOLUB, MILOS HAMMER
Keywords: visualization | vibrodiagnostics | offline- online diagnostics | technical diagnostics | maintenance | industry 4.0

SELECTED CHARACTERISTICS AND DIAGNOSTICS OF MOTOR POWERED BY FREQUENCY CONVERTER

PETR NAHODIL, MILOS HAMMER
Keywords: vibro-diagnostics | FFT spectrum of vibrations acceleration | technical diagnostics | capacitive current | shaft voltage | parasitic current and voltage | frequency converter

MECHANICAL PROPERTIES OF HYBRID COMPOSITES BASED ON POLYPROPYLENE MATRIX

MARTIN SEIDL, LUBOS BEHALEK, JIRI HABR
Keywords: mechanical properties | physical foaming agents | hybrid composites | polypropylene | cellulose fibres

INFLUENCE OF TESTING METHODS ON THE FINAL VALUES OF THE MODULUS OF ELASTICITY E

JIRI SOBOTKA, PAVEL SOLFRONK, DAVID KORECEK, MICHAELA KOLNEROVA
Keywords: student´s t-test | f-test | slope of line | material tests | linear fitting | elastic deformation | modulus of elasticity