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Performance of A Light Scattering Dust Monitor at Various Air Velocities:Results of Sampling In The Active Versus The Passive Mode

BROWSE_DETAIL_CREATION_DATE: 29-01-2013

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BROWSE_DETAIL_TYPE: Article

BROWSE_DETAIL_PUBLISH_STATE: Published

BROWSE_DETAIL_FORMAT: PDF Document

BROWSE_DETAIL_LANG: English

BROWSE_DETAIL_SUBJECTS: TECHNOLOGY, Mechanical engineering and machinery,

BROWSE_DETAIL_CREATORS: Listak, Jeffrey M. (Author), Chekan, Gregory J. (Author), Colinet, Jay F. (Author), Rider, James P. (Author),

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BROWSE_DETAIL_PUBLISHER: Atılım Üniversitesi BROWSE_DETAIL_PUBLICATION_NAME: The International Journal of Mineral Resources Engineering BROWSE_DETAIL_PUBLICATION_LOCATION: Ankara BROWSE_DETAIL_PUBLICATION_DATE: 2007 BROWSE_DETAIL_PUBLICATION_NUMBER: 1 BROWSE_DETAIL_PUBLICATION_VOLUME: 12 BROWSE_DETAIL_PUBLICATION_PAGE: 35-47


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The Respiratory Hazards Control Branch of NIOSH routinely conducts laboratory and

mine-site evaluations of dust control technologies. Gravimetric and instantaneous dust

sampling instruments are used in these evaluations to measure and document dust levels
to determine worker exposure. The Thermo personal DataRam (pDR) is an instantaneous
sampler that uses light-scattering technology to provide relative measures of
airborne respirable dust. The pDR can be used in active and passive modes to measure
respirable dust levels. Tests were conducted to evaluate the sampling performance
of active and passive pDR operation relative to each other and against a gravimetric
sampler (the accepted standard for respirable dust measurement). The purpose of the
test was to determine if the pDR can be used effectively in the passive mode in higher
velocity airflows (up to 5.1 m/s (1000 fpm)). Studies of the pDRs in both modes of
operation were conducted in a controlled laboratory environment and in field situations.
Dust measurements using pDR units in both modes of operation were recorded in velocities
ranging from 1.0 to 5.1 m/s (200 to 1000 fpm). Tests were conducted in ambient
air and in air with the addition of moisture. Results show that, although the units
measure different concentrations in their respective modes of operation as compared to
a gravimetric sample, the relative readings can be corrected to yield accurate dust measurements.




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