Owner`s manual

O ptima FX Owner’s Manual

Ch. 3 Pg. 1

Chapter 3

HammerHead Electronics

Introduction

This chapter is a basic overview of the electronics used on the HammerHead CCR.

This chapter is meant as a quick introduction rather than a detailed manual documenting all

the features and their uses. A separate document “HammerHead Electronics User Manual”

that is meant as a complete documention is available from Juergensen Marine and several

sources on the internet. The electronics user manual is continually updated as features are

added and improved.

The HammerHead electronic package consists of two handsets called the primary and

secondary, and the DIVA Heads-Up display. The primary is responsible for maintaining the

selected set-point, displaying the measured PO2 for the three main oxygen sensors, time,

depth and decompression information. The secondary is a backup display for the main

Oxygen sensors, secondary depth gauge, timer, DIVA Heads-Up display controller and

OPTIONAL decompression information. The secondary DOES NOT CONTROL the

solenoid, it is meant to allow the diver to manually maintain the breathing loop in the event

of a primary failure. The only common point between the primary and secondary is the

oxygen sensors. Each handset is fully independent and does not communicate with the other

in any way. All set-point changes and calibration must be independently performed.

System Overview

Before being able to dive the unit, it is necessary to understand the conventions used by

the handsets, calibrate the oxygen sensors and set diver preferences. Initially out of the factory,

some common set-points are defined, all gas mixes are programmed to AIR, and the units are

set to imperial. The handsets need activation before they will operate. This is done by the entry

of a PIN which can only be obtained for a specific unit from the manufacturer through a certified

instructor. The primary handset requires one PIN to enable the handset and another to enable

helium based decompression. The secondary requires one PIN to activate the handset and has

an optional PIN to enable deco functionality.