Shearwater Petrel
Revision 1.1.0
35
Shearwater Research Inc.
Switch to OC/CC
Depending on the current computer setting, this selection will show as
either “Switch CC > OC” or “Switch OC > CC”�
Pressing SELECT will select the displayed mode for decompression
calculations� When switching to open circuit while diving, the most
appropriate open circuit gas will become the breathing gas for
calculations�
At this point, the diver may want to switch to a different gas, but since
the diver may have other things to deal with, the computer will make a
“best guess” of which gas the diver would choose�
On computers with external oxygen sensor monitoring, there is also
an option to set the computer to calculate decompression predictions
using semi-closed circuit� This is enabled in the System Setup menu�
You can also switch to from CC to OC on a fixed PPO2 model. In that
case, the computer will use the user entered high and low setpoints�
Dive
Setup+
The Dive Setup menus are available both on the surface and when
diving�
The values in Dive Setup+ can also be accessed in the Systems
Setup+ menu, but the System Setup+ menu is not available when
diving�
Pressing SELECT will enter the Dive Setup sub-menu�
Low Setpoint
This item allows you to set the low setpoint value� It will display the
currently selected value� Values from 0�4 to 1�5 are allowed�
A press of MENU will increment the setpoint�
Press the SELECT button when “Edit Low SP” is displayed and the edit
display will be shown� It is set at the lowest valid value for setpoint, �4�
DEPTH TIME SURFACE
O 2
Hr
45
Mn
Switch CC > OC
DEPTH TIME SURFACE
O 2
Hr
45
Mn
Switch OC > CC
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DEPTH TIME SURFACE
O 2
Hr
45
Mn
Switch OC > SC
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DEPTH TIME SURFACE
O 2
Hr
45
Mn
Dive Setup+
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DEPTH TIME SURFACE
O 2
Hr
45
Mn
Switch CC > OC
1.3
DEPTH TIME SURFACE
DEPTH TIME SURFACE
Next
Change
Edit
Save
O 2
Hr
45
Mn
O 2
Hr
45
Mn
Edit Low SP O.7
Edit Low SP O.4
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Summary of Contents for Petrel EXT
Page 1: ...Standalone EXT Models...