User manual
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5 PREPARATIONS BEFORE DIVING
5.1 LEAKAGE AND FUNCTION TEST
5.1.1 LEAKAGE AND FUNCTION TEST FOR MKIII REGULATOR
Quick check of reserve valve
1. Close the reserve valve handle (position C) by pressing it in as far as possible.
2. Open the cylinder valve.
Check that the pressure is > 270 bar (3916 psi).
3. Close the cylinder valve.
Wait one minute.
Pressure drop < 10 bar/minute (145 psi/min) = OK
4. Open the cylinder valve.
5. Vent the octopus breathing valve by pressing the air discharge button.
Airow? Yes = OK
6. Vent the primary breathing valve by pressing the air discharge button.
Airow? No = OK
7. Reset the lever on the primary breathing valve if an overpressure version is being used.
8. Pull out the reserve valve handle as far as possible.
Is the reserve valve handle in middle position (D)? Yes = OK
9. Close the cylinder valve.
10. Release the pressure from the primary breathing valve by breathing slowly until the reserve position
is triggered (the respiratory resistance increases until the air supply stops completely). Check that the
air supply stops at an acceptable level above zero bar (or psi). (That is, the pressure gauge's red area.)
Yes = OK
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1. Pull out the reserve valve handle.
Does the needle of the pressure gauge drop to approximately 0 bar (0 psi)? Yes = OK
12. Reset the lever on the primary breathing valve if an overpressure version is being used.
13. Open the cylinder valve before diving.