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Assessment of exposure in epidemiological studies: the example of silica dust DIRK DAHMANNa, DIRK TAEGERb, MARTIN KAPPLERb, SEBASTIAN BU¨CHTEc,d, PETER MORFELDc,d, THOMAS BRU¨NINGb AND BEATE PESCHb a
An air-sampling device used to measure dust as in a cement mill or a mine; a measured volume of air drawn through a jet impacts on a glycerin-jelly-coated glass surface; the particles are counted with a microscope.
Jul 05, 2008· Mine Safety and Health Administration Introduction and Calibrating - Dust Sampling This is Part 1 of 4 Parts DVD011 - 2005 - Respirable Dust Sampling.
An air-sampling device used to measure dust as in a cement mill or a mine; a measured volume of air drawn through a jet impacts on a glycerin-jelly-coated glass surface; the particles are counted with a .
'Four sets of simultaneous samples were taken by konimeter for sampling asbestos dust.' More example sentences 'Four sets of simultaneous samples were taken by konimeter and thermal precipitator in South African asbestos mines and/or fiberising plants between 1940 and 1967.'
Definition of Zeiss konimeter. A portable dust-sampling instrument. See Also: konimeter. Click here to see list of references, authorities, sources and geographical terms as used in this glossary. ... Mining Companies Statistics Users Mineral Museums Mineral Shows & .
After their consideration of the " P.R.U. Hand Pump " as a coal face dust sampler [this Bulletin, 1958, v. 33, 668] the authors continue with a critical assessment of the " British Konimeter " as a dust sampling instrument in preparatory work, where both coal and rock may be present. They show that with the standard technique of counting, the dust spot on the disk is often decentred, leading to...
14. To maintain certification to collect respirable coal mine dust samples using a CPDM, the certified person must pass an MSHA examination _____. a. every 2 years b. every 3 years c. every 5 years d. only once 15. When programming the PDM to take a respirable dust sample, the serial number of the PDM will first appear _____. a.
"In this modern age, the scientific and technological developments have advanced mechanized mining to the status wherein the attendant dust problems have reached very serious hazard proportions. The significant roles, which have been perfected for the Zeiss konimeter and the midget impinger, in evaluating dust concentrations and thereby revealing possible improvements in making the .
Dust Sampling Instrumet. Dust sampling instruments:- Airborne dust is of considered dangerous, how can measure dust sample, Home;, Konimeter It consists of a telpic tube having an arrangement of lenses and a glass slide with glycerine to catch up the dust particles on it, - In quarrying and opencast mining a whole range explosives types ...
dust was made using a konimeter since 1958. The konimeter has ... coal mine dust personal sampler, which was extensively used in USA coal mines in conjunction with a 10 mm nylon cyclone
The current personal dust sampler used to measure exposure to coal mine dust uses a person-wearable pump, a cyclone that separates dust that can enter the inner lung, and a filter to collect dust that is then weighed [MSHA 1989]. Knowing the volume of air sampled and the mass of dust collected, a concentration is cal-culated.
Konimeter. From AMS Glossary. Jump to: navigation, search. konimeter (Also spelled conimeter.) An instrument for determining the dust content of a sample of air. One form of the instrument consists of a tapered metal tube through which a sample of air is drawn and allowed to impinge upon a glass slide covered with a viscous substance.
century with initial dust sampling techniques employing the konimeter, the use of the real- ... dust samplers at all South African underground mines were operated at a flow rate of ... 1998). Currently, mine dust sampler pumps draw 2.2 L/min of air through a mini-cyclone, which separates the airborne dust and collects only the fraction of ...
noun An instrument for collecting dust samples which directs a measured volume of air on to a greased slide to which any dust present will stick. 'Four sets of simultaneous samples were taken by konimeter for sampling asbestos dust.'
the dust sampling to places in the mine which are occupied by the men among whom the incidence of disease is to be measured. Similarly, we must establish the duration ofexposure ofthese menand ofnoothers. The Mean Concentration The variability of dust concentrations at .
Sep 28, 2010· • Pump operated at 1.7 liters per minute in M/NM mines Sampling with Gravimetric Samplers • Filter is pre- and post-weighed to determine mass gain and is used to calculate an average dust concentration over sampling period • Filter processed using XRD analytical technique for silica content (NIOSH Method 7500)
smes dust in manufacturing. ... Conference has a long running history of excellence in providing a regionally focused conference for the iron ore mining industry. For over 90 years, the SME Minnesota Section has held the conference to support the growth and advancement of the industry in the Midwest.
Jan 22, 2009· Dust levels change from moment to moment and no single moment need be representative of a particular miner working a particular shift. Mines are huge workplaces and individual readings are unlikely to be typical of a mine as a whole. The Konimeter is inefficient when sampling high levels of fine dust but reliable with low levels of coarse dust.
dust was made using a konimeter since 1958. The konimeter has . ... The nylon cyclone is shown to be an acceptable respirable dust sampler for the Ontario hard-rock mining environment. Furthermore ...
Quick thermal conductivity meter, to measure the thermal conductivity of rocks. Real time aerosol monitor, gravimetric dust sampler, personal dust sampler, konimeter with projector for studying the air borne respirable dust concentration in mine air. Digital sound level meter with recorder, for studying noise levels in mines and mining areas.
This is a motor-driven konimeter which takes 30 separate dust samples at regular intervals, which can be varied from 4 to 60 minutes, giving total sampling times between 2 and 30 hours. The dust spots are arranged on the circumference of a glass plate. The apparatus is said to be an improvement on the recording konimeter made by Zeiss, Jena, which produces a continuous dust trace.
This means any person carrying out respirable dust sampling at a coal mine in accordance with AS 2985 must have the recognised competencies as determined by the Coal Mining Safety and Health Advisory Committee. Due to the long latency of many respiratory diseases it is essential that workers' exposure to dust particles be minimised ...
konimeter konimeter dust sampler mining "Correlation of dust "In this modern age, the scientific and technological developments have advanced mechanized mining to the status wherein the attendant dust problems have reached very serious hazard proportions The significant roles, which have been perfected for the Zeiss konimeter and the midget impinger, in evaluating dust .
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