Micra ADJ Layout - Aberdeen Watersports

18 Micra ADJ Second Stage Service & Repair Manual3. When purge flow is correct, remove the second-stage from themouthpiece adapter on the flow test bench. Shut the valve ofthe test bench, and purge the second stage to depressurize thesystem. Remove the regulator.EXTERNAL LEAK TEST1. After disconnecting the regulator from the flow bench, connectto a scuba cylinder filled to approximately 3,000 psi.Open the cylinder valve to repressurize the regulator, andsubmerge the entire system in a test tank of clean water.2. Observe any bubbles arising from the submerged regulatorover a one minute period. The recommended time is necessarydue to slower bubble formation that occurs in smallerleaks. Bubbles indicate a leak, which requires that the systemmust be disassembled at the source to check sealing surfaces,assembly sequence and component positioning in order tocorrect the problem(s).NOTE: Extremely small leaks may be better detected byapplying a soap solution or Snoop to the leak area.Bubble streams will indicate the source of the leak. Beforedisassembling to correct any leaks, rinse the entire regulatorthoroughly with fresh water and blow out all residual moisturewith filtered, low-pressure (50 psi) air. Disassemble andremedy the problem, referring to Table 1 - Troubleshooting.SUBJECTIVE BREATHING TEST1. While the regulator is connected to a cylinder containing3,000 psi and pressurized, turn the second stage adjustmentknob completely out counterclockwise to the full positiveposition, and verify that a slight leak of airflow is present.2. Slowly turn the adjustment knob in clockwise to verify thatthe airflow stops between 2-w turn.3. Turn the adjustment knob completely in clockwise to the fullnegative position, and depress the second stage purge toensure that an adequate volume of air needed to clear thesecond stage flows through the mouthpiece..4. Turn the adjustment knob back to 2-w turn negative, andbreathe from the second stage. A properly serviced andadjusted regulator should deliver air upon deep inhalationwithout excessive inhalation effort, freeflow, or “fluttering” ofthe second-stage diaphragm. When exhaling, there should beno fluttering or sticking of the exhalation valve. If any ofthese problems occur, refer to Table 1 - Troubleshooting.This concludes annual service procedures for the Micra ADJ© 1997 U.S. Divers Co., Inc.