Technology

HEADS-UP DISPLAY (HUD)

The Primary Display (HUD) is a Shearwater DiveCAN Heads-Up Display mounted on either the right or left side of the DSV/BOV mouthpiece just below eye level. Each HUD provides a PPO2 status indicator for its corresponding O2 sensor by using a “Smithers Code” flashing the status on a cycling 5-second loop during the dive.

PRISM 2

TECHNICALLY FOCUSED

BREATHING LOOP

It’s breathing loop which is a keyed one way assembly consists of a closable mouthpiece assembly with mushroom check valves either side, which ensure uni-directional flow.

SCRUBBER DESIGN

A radial flow scrubber canister is mounted vertically on a backplate attached to the integrated BC, between twin supply cylinders (one each, oxygen and diluent).

COUNTERLUNGS

Dual, front mounted counter lungs provide the diver with a flexible reservoir equivalent to the maximum displacement of the diver’s own lung volume and ensures the lowest possible hydrostatic loading. These counter lungs are fitted with both automatic and manual gas addition systems and a variable volume control valve (used upon ascent to vent excess expanding gas volume or to purge the loop). Diluent addition is automatically achieved as hydrostatic pressure increases and the counter lung collapses against the valve actuator.

ELECTRONICS

The electronics, sensors and batteries are mounted in the electronics head assembly at the top of the scrubber, with supply hoses feeding over the diver’s shoulders into the top of the counter lungs. An analog LED primary display offers a quick reference of unit performance with status and alarm indicators while an independent digital OLED secondary display verifies the unit’s performance.

STATUS CHECK

With the electronics switched on, the secondary also provides a status check for the battery and displays the set point selected for the dive along with other critical information. The electronics vote between the three proprietary galvanic sensors and control the operation of a low wattage solenoid valve on the oxygen supply.