DPX warning functions
The DPX surface unit has alarm functions for incorrect use and is designed to minimize the risk of feeding a wrong gas to the diver.
There are four warnings: Red Whistle Low Gas, Blue Whistle Low Gas, Valve Open whistle and Pressure Release Valve. To know which whistle gives the warning, just put a finger on the whistle outlet and the sound is lowered or disappears, when touching the whistle that gives sound. The following list helps to take the correct actions when an alarm occurs.
Warning sound |
Cause |
Action |
Red LOW GAS Whistle (≈ 55 bar) |
Low gas supply pressure |
-Open second gas cylinder |
Blue LOW GAS Whistle (≈ 55 bar) |
||
VALVE OPENWhistle |
DPX switch valve in “DEEP” position and deco gas side pressurized. |
-If deco gas shall be used, turn DPX switch valve to “DECO” position. -If deep gas shall be used, close deco cylinder valve. |
Pressure Release Valve (≈ 30 bar) |
DPX switch valve in, or being turned to “DECO” position with "DEEP" side pressurized. |
-If deco gas shall be used, make sure that the deep gas cylinder valve is closed and continue to release remaining pressure -If deep gas shall be used, turn back the DPX switch valve to “DEEP” position. |