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Metal and Nonmetal National Mine Rescue Contest Rules

Metal and Nonmetal National Mine Rescue Contest Rules

Metal and Nonmetal National Mine Rescue Contest Rules

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TESTERSTEP SETTING PROCEDURE HINTS9. Neg. Pres. Leak Re move plug from re liefvalve only.Neg. Pres. Pump down to -100 mmPump ing H 2 O (-10 mbar).Leak Test Bleed nee dle up to -70 mmH 2 O (-7 mbar).Start stop watch, ob serveme ter for 60 sec onds.Should not drop morethan 10 mm H 2 O(1 mbar).10.Preflush/Pres sureRe move plug fromGauge whis tle.Equal iza tionNeg. Pres. Open O 2 cyl in der valve.Pump ing Bag should com pletelyin flate.Com pare gauge read ings.Neg. Pres.Pump ing<strong>and</strong> LeakTest(Al ter nate Re lief Valve Test)Open cyl in der valve.Re lief valve should openbe tween +10 <strong>and</strong> +40mm H 2 O (+1 <strong>and</strong> +4mbar).11.Lung De m<strong>and</strong> Neg. Pres. Pump <strong>and</strong> count strokes.Valve/Breath ing Pump ing Should be at least 10Bag Vol ume strokes be fore de m<strong>and</strong>valve opens. Valveshould open be tween-10 <strong>and</strong> -40 mm H 2 O(-1 <strong>and</strong> -4 mbar).65

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