Dive Rite O2ptima Owner's Manual download pdf (Page 28)

Dive Rite

Ch. 3 Pg. 8

NEXT SELECT

GF Now [10/100]

NEXT SELECT

Open Circuit

GF [1] [10/100]

NEXT SELECT

Closed Circuit

GF [2] [20/95 ]

NEXT SELECT

GF [3] [25/85 ]

NEXT SELECT

GF [4] [30/75 ]

NEXT SELECT

GF [5] [35/70 ]

NEXT SELECT

GF User [95/100]

NEXT SELECT

The next option allows the diver to put the handset in either open circuit

or close circuit mode. In open circuit mode, solenoid control is disabled,

unless the PO2 falls to 0.19Ata. This function allows the diver to bail

onto open circuit and still have decompression obligations calculated.

Switching to open circuit mode also prevents the display from flashing

while the system is being worked on, or disconnected from the rest of

the rebreather. The left button toggles between modes while the right button selects the displayed

mode. The system has a short cut out of open circuit and into closed circuit. If the diver chooses

a set-point while the handset is operating in open circuit, the handset immediately switches to

closed circuit mode with the selected set-point.

CONSERVATISM

The next option is setting the level of conservatism for the decompression model. Upon

selecting the Conservatism function the current Gradient Factors are displayed. The

HammerHead is a true gradient factors implementation with separate limits determining where

the stops begin and when to proceed to the next level. There are five preprogrammed gradient

factor sets and one user programmable setting. The selected gradient factor can be changed

during the dive allowing full control over the dive profile. The user programmable selection can

even be reprogrammed while in dive mode.

Changing the conservatism requires entering the “OPT” menu by scrolling past the set-point

changes and other miscellaneous functions until “OPT” is displayed. Enter this menu by pressing

the RIGHT button. Press the left button until “Conservatism” is displayed, press the RIGHT

button to select. The current conservatism will be displayed.

The user can now scroll through the 6 programmed settings with the LEFT button. Each choice

will display the associated GF-Low and GF-High settings.

Once the desired setting is displayed, select it with the RIGHT button then confirm the choice

when prompted with the LEFT button. All confirmations on the HammerHead are done using

the LEFT button. This prevents accidental confirmations due to double button presses.

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Dive Rite O2ptima Owner's Manual Page 28

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