Aqua Lung i550C - User Manual

© Aqua Lung International, Inc. (2018)
Dive Computer Owner's Manual
Doc. 12-7909-r06 (7/10/19)
i550C
(P/N's NS117121 - NS117126)

Summary

Notices and Safety Guidelines

Decompression Model and Warning Symbols

Explains the decompression model and warning symbols.

Responsible Computer Diving Practices

Essential rules for safe computer-assisted diving.

General and Safety Warnings

Manual Usage, Training, and Backup

Emphasizes training, manual use, and backup systems.

Understanding Displays and Technology Limitations

Interpreting data and device limitations.

Altitude Diving Considerations and Risks

Decompression, Depth, and Violation Mode Risks

Risks of deep dives and computer behavior when limits are exceeded.

Getting Started

Introduction to the i550 C Dive Computer

Device Activation Procedure

Steps to power on and initiate the dive computer.

Getting Started

Button Operation Guide

Dive Features

Dive Time Remaining (DTR) and No-Decompression Limits

Explains DTR calculation and NDL definitions.

Ascent Rate and Nitrogen Bar Graphs

Audible Alarm System

Oxygen Time Remaining (O2 MIN) and Bar Graphs

Algorithm, Conservative Factor, and Deep Stop Settings

Explains Z+ algorithm, CF, and DS features.

Dive Features

Safety Stop (SS) and Low Battery Warnings

Dive Surface Mode

Dive Log Data Screens and Gas Settings

Alarm Settings Overview and Audible Alarms

Elapsed Dive Time and Nitrogen Alarms

Time;Date Setup, Mode Selection, and History

Dive Surface Mode

Dive Planning (PLAN) and Dive Log Access (LOG)

Gas Configuration Screens

Dive Surface Mode

Deep Stop, Safety Stop, and Conservative Factor Settings

Configuring key dive safety features.

Dive Operation

Initiating a Dive and No-Decompression Display

Steps to start a dive and main screen during no-deco dives.

Complications and Dive Issues

Section covering dive problems.

Entering Decompression Mode and Stop Displays

What happens when deco limits are exceeded and related screens.

Dive Operation

Dive Alternative Screens and Deep Stop Features

Gas Switching Procedures and Overview

VGM on Surface and High PO2 Alarms

High O2 Saturation (O2 SAT) Alarms

Dive Operation

Safety Stop Display and Surfacing

Surface Alarms and VGM Transition

Dive Operation

High PO2 Warning and Override Procedures

Managing critical oxygen partial pressure levels.

Conditional Violation (CV) and Delayed Violation Type 1 (DV1)

Handling deco violations without credit.

Delayed Violation Types 2 & 3 and VGM During Dive

Handling further violations and VGM during dives.

Gauge Mode

Surface Display and Main Menu Navigation

Gauge Mode

Initiating a Gauge Dive and Main Displays

Steps to start a dive and key screens in Gauge Mode.

Gauge Mode

Delayed Violation Type 3 in Gauge Mode

Reference

Data Transfer, Care, and Servicing

Battery Installation and Altitude Adjustments

Reference

Battery Replacement Procedure

Technical Data

No Decompression Time Limits Tables

NDL data for various altitudes and depths.

Technical Data

Altitude Levels and Oxygen Exposure Limits

Display Details and Operational Limits

Technical Data

Dive Computer Specifications

Detailed technical specifications of the i550C.

Aqua Lung i550C Specifications

General

Brand	Aqua Lung
Model	i550C
Category	Diving Instrument
Language	English