This is a Carl Zeiss konimeter in the collection of an instrument collector in Catalonia. A konimeter is an instrument for measuring the dust content of a sample of air. A measured volume of air is drawn through a jet, to impinge on a surface coated with a glycerin jelly. The dust adheres to the surface and the particles are counted under a ...
Place capsule over PDM filter when TEOM unit removed from PDM. Use capsule as filter removal tool and to secure dust. Send to lab, remove finger tab, ash …
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.
5th International Report on the Prevention and Suppression of Dust in Mining, Tunnelling and Quarrying, 1968-1972 International Labour Office From inside the book
century with initial dust sampling techniques employing the konimeter, the use of the real-time Hund Tyndallometer, and later the introduction of gravimetric sampling in the mid …
In China, during 1988–1989, airborne dust samples were collected for conversion factors using US 10-mm nylon cyclone, multistage cassette impactor (used in USA), and Chinese total dust sampler with parallel sampling in the industries (Wu et al., 1992), where an epidemiological cohort study was conducted. The conversion factor is …
Debu merupakan partikulat padat y ang berukuran antara 1 mikron sampai d engan 100 mikron (R uze r . ... paparan debu dengan Personal Dust Sampler (PDS), dan gangguan ... Tìm hiểu thêm Di area pertambangan yang dikelilingi hiruk pikuk mesin-mesin berat, Jim Mann berjongkok dan meraup segenggam batuan hitam kecil.
The results quoted show that there is no constant factor connecting the dust counts, the ratio of konimeter count to thermal precipitator count varying from O�ll to 3�82, …
"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 …
The gravimetric sampling of dust of an airborne nature is not only the internationally acceptable method of determining dust concentrations but is in general use in South Africa. While the Departmetn of labour advocates the sampling method, they do not have thierown sampling guidlines or established method and use that devised by the Department of …
In the uranium mine, the Witwatersrand konimeter gave a 25% lower measurement of dust concentration than the Gathercole. The pre-impactor reduced the particle concentration measurement of the Witwatersrand konimeter by about 4%, but the result was not statistically significant. The Devers and Gathercole konimeters gave …
DEPARTMENT OF MINING ENGINEERING DEMONSTRATION PLAN Dlsclpline: MINING Subjectl'r,I ... Group1(3p) Study& uses of Konimeter. Group2(3p) Study& uses of ... Group2(3p) EXPT-8-RECORD EVALUATION/SESSIONAL/VIVA VOCE Group1(3p) Sampling of dust by gravimetric dust sampler. Group2(3p) Sampling of dust by …
respirable dust concentration indicated by a sampler that has an aero-dynamic size selector. ... L. C. Richards, W. Stefanich, T. S. Cochrane, Program Coordinator, Mining Research Centre, Mines Branch, Department of Energy, Mines and Resources. ... The Effect of Heat Treatment and Acid Wash on Konimeter Dust Estimates 3-. 16 …
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Definitions 3 'Particulates' – Collection of discrete particles In practical terms anything from a 'few' nm to a 'few' mm in diameter that can become suspended in the atmosphere Compositionally homogenous or varied Characteristic morphology(ies) – Primary particles are emitted directly – Secondary particles are formed by chemical processes in atmosphere
Abstract. Simultaneous airborne dust samples were taken with three types of instruments: konimeter, thermal precipitator and dosimeter (personal sampler with …
The Handbook has its origins in a Chamber 1947 publication on the "Quality of Mine Air: Dust Content and Cooling Power" which contained recommendations for standard …
Email to a Friend. The term "konimeter" is used generally to designate a type of dust-sampling instrument that collects the dust from a small volume of air by impingement …
Simultaneous airborne dust samples with konimeter, thermal precipitator and dosimeter in asbestos mines Ann Occup Hyg. 1977 Dec;20(4):333-44. doi: 10.1093/annhyg/20.4.333. Authors R S du Toit, T ... Mining* Occupational Medicine Substances Air Pollutants ...
DUST SAMPLER 1. KONIMETER The Konimeter (dari bahasa Yunani debu "Konis") adalah perangkat untuk mengukur aerosol dan konten debu di udara. Pengukuran adalah bahwa hal itu oleh celah sempit, sejumlah tertentu udara dikompresi, yang terletak di bawah pembukaan dengan zat lengket (seperti gliserol atau glukosa) pelat kaca dilapisi, …
Simultaneous airborne dust samples were taken with five types of instrument, namely, konimeter, thermal precipitator, membrane filter, tyndallometer and VC 25 …
sampler collects with 50% efficiency. • Looking at the ISO 7708 curve shown, you can see that the size of dust that the samplers must collect with 50% efficiency is 4 um. • Particles smaller than 4 um are collected with an efficiency greater than 50%.
Simultaneous airborne dust samples were taken with three types of instruments: konimeter,thermal precipitator and dosimeter (personal sampler with membrane filter) …
DEPARTMENT OF MINING ENGINEERING DEMONSTRATION PLAN Discipline: ... Group2(3p) Study & uses of Konimeter. 8th Group1/3p) EXPT-8-RECORD EVALUATION/SESSIONAL/VIVA VOCE Group2(3p) EXPT-8-RECORD EVALUATION/SESSIONAL/VIVA VOCE Group1(3p) Sampling of dust by gravimetric …
Many translation examples sorted by field of work of "konimeter" – English-Chinese dictionary and smart translation assistant.
Describes methods of dust-sampling such as weighing the dust caught on cotton-wool, the sugar tube, konimeter, circular konimeter and the thermal precipitator. Covers the work of mine dust inspectors, the Miners' Phthisis Prevention Committee and the Chamber of Mines Dust Department.
century with initial dust sampling techniques employing the konimeter, the use of the real-time Hund Tyndallometer, and later the introduction of gravimetric sampling in the mid-1990s, despite ... flow rate is 2.2 L/min (Kenny, Baldwin and Maynard, 1998). Currently, mine dust sampler pumps draw 2.2 L/min of air through a mini-cyclone, which ...
Major hazards in an underground coal mine include methane and coal dust explosions and personal exposure to dust. Based on the first ever recorded coal mine explosion in Southern Africa in Natal in 1891, it can be inferred that underground coal mines have been operational for over 125 years [1].Considering where the global coal mining …