Dive Rite O2ptima Guía de usuario descargar pdf (Pagina 31)

The other unique feature pertaining to set-point maintenance is the algorithm used

to hold the selected set-point. Each manufacture comes up with their own unique

formula to determine when oxygen is injected; the user generally has no control over this

function. The Hammerhead has two user selectable modes, standard mode, which allows

a user defined deviation below set-point before the solenoid will fire, or Juergensen mode

which adapts to depth and distance from set-point to determine firing duration and

frequency.

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

The design goal of the HammerHead electronics was to make the safest CCR

controller in the industry. All reasonable attempts have been made to prevent a single

failure from becoming a life-threatening occurrence. When the electronics were being

designed, Kevin Juergensen sketched out what he called a “Threat Matrix”, listing

possible conditions along with generated warnings and solutions.

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Dive Rite O2ptima Guía de usuario Pagina 31