U.S.N. Procedures for Testing the Breathing Characteristics of Open Circuit Scuba Regulators

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U.S. Department of Commerce, National Technical Information Service, 1973 - Deep diving - 50 pages
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11 DECEMBER 12-pound force 1pm RMV 22 March ahall air flow rate air outlet line air per minute air supply ambient pressure apparatus applicable box specification boxes conforming breathing machine test breathing resistance breathing resistance tests breathing tube breaths per cation circuit SCUBA regulators cm H.O common carrier CROSSBAR demand regulator assembly demand valve depth diaphragm differential pressure diver Double-Hose during any exhalation exhalation cycle exhalation pressure test exhaust manifold exhaust valve Experimental Diving Unit face mask flberboard flow condition flow condition pressure flow inhalation Flow Inhalation Pressure flowmeter frequency response FULCRUM given ambient pressure Government hall high pressure regulator hose Hose couplings inches of water inhalation and exhalation inhalation cycle inlet inside the mouthpiece Inspection liters per manifold manometer manual maximum pressure differential Mechanical peak inhalation MIL-R mile per hour MILITARY SPECIFICATION REGULATOR Military Specifications MILSPECS minute volume mouthpiece during mouthpiece level mouthpiece or face Naval NAVXDIVINGU Navy Experimental Diving nonmagnetic observed between ambient open circuit SCUBA oxygen packaged packed peak exhalation pressure plus or minus plywood porosity pounds POUNDS WEIGHT preproduction pressure air pressure at mouthpiece pressure differential observed pressure inside pressure-volume plot procedures proposed psi over bottom psig reference pressure regu requirements reserve valve respiratory minute Respiratory Pressures sample regulator sample regulator assemblies Screw Thread sea water shipment Shipping containers shown on figure Simulated swimming Simulated swimming test Single-Hose sinusoid special tools specified herein standards steadv flow STEPHEN D subjective peak Subjective peak inhalation supplier supply pressure SWIMMER swimming test swimming test arrangement tank TANK TOP tested in accordance throttle valve tidal volume total differential transducer U.S. Naval service U.S. Navy Underwater Breathing Apparatus University of California WASHINGTON NAVY YARD waveform WEIGHTED CROSSBAR wood cleated

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