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The effect of water vapor and water droplets on the RAM-1 (preliminary results).
Vinson-RP; Williams-KL; Schnakenberg-GH Jr.; Jayaraman-N
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8898, 1984 Jan; :1-11
The Bureau of Mines examined the effects of high humidity and water droplets on the GCA Corp. real-time aerosol monitor (RAM-1), which used a 10-mm cyclone preseparator. Tests were conducted both in a laboratory and in a full-scale model mine entry. The laboratory tests were conducted in a test chamber saturated with moisture and water droplets. Under these extreme conditions, the ram-1 responded by indicating dust concentrations of 1 1/2 to 2 mg/m3, although the air was dust free. Within the first 2 h of each test, water accumulated in the cyclone and affected the cyclone particle separation characteristics, resulting in readings of 3 to 4 mg/m3. In addition, condensation formed inside the ram-1 case and affected the liquid crystal display. However, the full-scale mine entry tests revealed that the RAM-1 can function acceptably in an atmosphere of water vapor and water droplets similar to the most severe conditions found in an underground mine.
Dust; Monitors; Instrument-characteristics; Mine-ventilation; Dust-control; Water-impingement; Humidity; Sprayers; Aerosols; Air-pollution
IH; Report of Investigations
NTIS Accession No.
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 8898
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division