Owner`s manual

Dive Rite

Ch. 3 Pg. 2

Activation PINS:

Primary: Serial Number: __________ User: _________ Helium: _________

Secondary: Serial Number: __________ User: _________ Deco: _________

The primary handset can operate using Imperial or Metric units of depth and temperature

but the PO2 on both handsets is ALWAYS displayed in units of ATA not Bar. This should be

of particular interest because several other CCRs and dive computers use Bar as base unit. The

use ATA as the base unit conforms to NOAA exposure definitions. The European tradition of

using NOAA exposure tables but treating the values, in units of Bar is slightly more conservative

for oxygen exposures. Planning the dive with the set-point in Bar while set-point is actually in

ATA will result in a slightly more conservative profile.

The HammerHead features automatic set-point switching and set-point maintenance,

manual set-point switching with automatic set-point maintenance, and fully manual PO control.

The control mode is chosen by the diver and can be changed at anytime. Closed circuit

rebreather divers typically use more than a one set-point during a dive, the Hammehead allows

for 5 preprogrammed (and editable) set-points.

Set-Point Switching

The HammerHead determines manual or automatic set-point switching based on the

selected Set-point. Manual mode is selected on the surface by choosing any set-point 1.0 ATA

or less. If the diver chooses a set-point greater than 1.0 ATA, the electronics will start the dive

with a set-point of 0.4 ATA, transition to 1.0 ATA at 1m (~3fsw), and finally the chosen

set-point at 3m (10fsw). Automatic set-point switching is performed (in reverse) on ascent if the

selected set-point is greater than 1.0 ATA and the depth is less than 3m (10fsw).

Each handset has two buttons, which are used for programming and control.

Pressing either button will activate the backlight for the user chosen time, and will wake up a

handset that is in sleep mode. The left button scrolls through menu selections and values while

the right button selects the current value. The handsets will timeout after a 10 second period of

inactivity, and return to the normal operation mode. Several options will require confirmation.

Failure to confirm action cancels any changes. The handset Backlight and LEDs also serve as

a CRITICAL ALARM. This alarm is disabled on the primary while operating in open circuit

mode