A-A-2944
3.11 Performance.
3.11.1 Noise. The maximum noise generated by the cleaner shall be 60 dbA when tested in accordance with ASTM F1334.
3.11.2 Continuous duty. The cleaner shall be designed for continuous duty. Continuous duty is defined as constant operation for an 8-hour workday. As evidence of the continuous duty capability, the cleaner shall be capable of withstanding a continuous 10-hour run with the orifice wide open. All lubrication points except sealed bearings shall be visually checked after this run. The lubricant shall be visually examined and shall not contain any metallic particles and lubricant quantity shall be ample. Evidence of galling or similar deficiency or lack of lubrication shall be cause for rejection. The commutator(s) shall be visually examined there shall be no evidence of burning or pitting.
3.11.3 Vacuum producer water lift. When tested in accordance with ASTM F558, the vacuum producer shall develop a minimum of 40 inches (1.02m) of sealed water lift through a 3/4-inch (19.0 mm) orifice and 8 inches (203 mm) of sealed water lift through a 1-1/2-inch (38.1 mm) orifice.
3.11.4 Filtration. The contractor shall certify, or shall contract an independent laboratory to certify, that the filter system entraps and retains 99.97% of all microorganisms0.3 µm and larger ingested by the cleaner. This certification shall detail the test methods, the aerosols, the culture mediums, the sample count, the bacterial count of the ingested air, the bacterial count of the exhausted air, and the collection efficiency expressed percentage. Culture mediums shall be exposed to the flow of the exhaust air for 5 ± 0.5 minutes for the efficiency samplings. Certification tests shall also demonstrate that organisms cannot migrate through the filters. This shall be demonstrated by sampling exhaust air for at least 30 minutes after shutdown of the bacterial aerosol which the cleaner had been ingesting for the prior 30 minutes. Clean, new filter efficiencies shall be a minimum of 99.97%. Collection efficiencies shall show an upward trend as the cleaner is used.
3.11.5 Hose compression. The hose shall withstand a minimum compressive load of 150 lb (667 N) applied to any portion of the hose no closer than 12 inches (305 mm) from any fittings by means of parallel flat surfaces having lengths of not more than 3 inches (76.2 mm) parallel to the axis of the hose for not less than 2 minutes. The compressive load shall cause no rupture of any portion of the hose and the resulting hose diameter shall not differ more than 1/16 inch (1.59 mm) from the diameter prior to the compressive load.
3.11.6 Couplings. The engaged wand, hose, and tools shall be able to withstand a tensile force of 25 lb (111 N) for 2 minutes at each coupling without separation. Couplings shall engage and release satisfactorily before and after being subjected to the 25 lb (111N) tensile force.
3.12 Workmanship. The cleaner and all accessories shall be constructed, assembled, and finished in a manner to assure good quality equipment of a neat general appearance and free from imperfections which may affect durability, serviceability and appearance.
3.13 Measurement system. The values stated in inch-pound units are to be regarded as the standard. The metric values stated in parentheses are provided to an accuracy of three significant digits and are for informational purposes only.
3.14 Metric products. Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inch-pound units, providing they fall with the tolerances specified and all other requirements of this document are met. If a product is manufactured to metric dimensions and those dimensions exceed the tolerances specified in the inch- pound units, a request should be made to the contracting officer to determine if the product is acceptable.
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