Nitek Dive Rite User Manual

UserGuide

www.diverite.com

Dateofpurchase:

NiTekPlusDiveComputer

Content

NiTek Plus Dive Computer User Manual i

DEVELOPED BY

Dive Rite 175 NW Washington Street Lake City, FL 32055 Phone: 386.752.1087 Fax: 386.755.0613 Web: www.DiveRite.com

You may not reproduce, translate, transcribe, or transmit any part of this manual without express, written permission from Lamartek, Inc. dba Dive Rite.

WARRANTY INFORMATION

Dive Rite will—at its sole discretion—repair or replace NiTek Plus components proved to be damaged by faulty manufacture or material, at no cost, for a period of up to one year (365 days) from the date of purchase.

This warranty applies only to the original retail purchaser. It does not cover commercial or rental use, nor does it extend to units purchased from other than an authorized Dive Rite dealer.

This warranty specifically excludes battery depletion or other conditions resulting from misuse, negligence, alteration, accident, or unauthorized repair.

To make a claim under this warranty, the owner must have registered his/her warranty using Dive Rite’s website (www.diverite.com). He or she must then return the damaged items to Dive Rite, along with a copy of the original purchase invoice or receipt. No warranty service will be performed for other than registered owners.

This warranty becomes void if NiTek Plus components are damaged by anything other than normal recreational diving use, or if they have been serviced or repaired by other than authorized Dive Rite dealers.

Repairs made under this warranty will not extend the warranty period.

All further claims, especially for damage after diving accidents, are excluded from coverage under this warranty.

Dive Rite has no obligation to honor any extension of this warranty.

This warranty is in lieu of all other warranties, expressed or implied. No other person or representative is authorized to assume for Dive Rite any other liability in connection with the sale of this product.

Content

ii NiTek Plus Dive Computer User Manual

Table of contents

Chapter 1 Introduction • 1

Overview • 2 Features and functions • 3 Specifications • 5 Warnings • 6

Chapter 2 Using the NiTek Plus • 9

Getting started • 10 Accessing display modes and screens • 11 Time display mode • 12 Dive option set and display mode • 15 Plan mode • 23 Alarm display and set mode • 26 Dive computer mode • 28 Gauge mode • 37 Log mode • 38 Profile mode • 41 PC transfer mode • 43 Surface mode (upon surfacing from a dive) • 44 Altitude operation • 46

Chapter 3 Care and maintenance • 48

Proper handling techniques • 49 Low battery warning • 51

Index • 53

NiTek Plus Dive Computer User Manual 1

Chapter 1

Introduction

Summary

This chapter provides an overview of the NiTek Plus, lists the NiTek Plus’s features and functions, and covers warning information that should be read before using your NiTek Plus.

Content

Overview • 2 Features and functions • 3 Specifications • 5 Warnings • 6

When diving… • 7

Introduction

2 NiTek Plus Dive Computer User Manual

Overview

Congratulations on your purchase of the NiTek Plus dive computer. The NiTek Plus is a sophisticated and comprehensive dive computer that was designed to offer you the latest in dive computer technology, safety, and reliability.

The NiTek Plus dive computer is a multifunctional computer for recreational diving, providing information on depth, dive times, no-decompression and decompression times, and nitrogen and O2 absorption and elimination during all dive phases, including ascent, surface interval times, and subsequent dives.

This information is displayed on an easy-to-read display, providing simple and direct communication between the diver and the computer. With an easy-to-read display, the diver has no problem following and reading the displayed information.

The NiTek Plus comes standard with a number of modes, including a time mode, dive set mode, dive plan mode, log mode, profile mode, PC transfer mode, and dive mode.

Note: It is extremely important that you carefully read and

understand this manual. Make sure you fully understand how the NiTek Plus operates before diving with it.

This manual has been divided into three chapters:

• Introduction: Covers the features and functions,

specifications, and warnings for the NiTek Plus

• Using the NiTek Plus: Covers the operation of each mode

for the NiTek Plus

• Care and maintenance: Covers how to properly care for

and maintain the NiTek Plus

Introduction

NiTek Plus Dive Computer User Manual 3

Features and functions

The NiTek Plus incorporates a number of important modes and features:

• The NiTek Plus turns on automatically upon descent

• On the surface, the NiTek Plus constantly displays a minimum of date and time

• The NiTek Plus is capable of displaying two different times through an alternate time display mode

• The NiTek Plus uses easily accessible and highly reliable push buttons instead of exposed electrical contacts

• The NiTek Plus can be programmed to monitor exposure to two different gas mixtures during a dive. Mix1 is programmable for mixtures ranging from air (EAN21) to EAN50. Mix2 is programmable for mixtures ranging from air (EAN21) to EAN99. Underwater, NiTek Plus users can switch between mixes at the push of a button.

• The NiTek Plus is capable of functioning up to a depth of 328 feet (100 meters) when in dive computer mode and 656 feet (200 meters) when in gauge mode

• The NiTek Plus automatically adjusts for altitudes up to 19,680 feet (6,000 meters)

• The NiTek Plus displays a variety of data underwater including: date, time of day, current and maximum depths, no-decompression dive time elapsed and remaining, and water temperature

• The NiTek Plus displays data specifically related to the use of Enriched Air Nitrox (EANx) including: fraction of oxygen (FO2) setting, partial pressure of oxygen (PO2), and an oxygen limit index (OLI) representing the cumulative effect of a diver’s exposure to elevated PO2s (the theoretical “CNS clock”) as a bar graph

• Through a combination of audible and visible alarms, the NiTek Plus helps to alert the diver to a number of possibly hazardous situations including: violation of ascent rate, nodecompression state, and whether mandatory decompression

Introduction

4 NiTek Plus Dive Computer User Manual

stops are necessary or if the diver has ascended above a mandatory stop ceiling. Nitrox specific warnings occur when the diver approaches or exceeds a limiting PO2 of 1.4 atmospheres for mix1 and 1.6 atmospheres for mix2, and when cumulative exposure to elevated PO2s exceeds recommended limits.

• The NiTek Plus can calculate decompression stop requirements for stops as deep as 90 feet (27 meters)

• The NiTek Plus can be programmed to display data in Imperial or metric units

• Dive depth can be displayed in fresh or salt water equivalents

• Special mode indicators makes it easy to determine what display mode or screen you are in at any time

• The NiTek Plus has a back light to illuminate the screen, which can be turned on with the touch of a button in surface and dive mode

• The NiTek Plus’s memory capability enables it to hold and display log data on up to 30 hours of dive time or 60 dives

• Detailed dive-profile information can be stored for each dive through user-programmable sample intervals of 15 or 30 seconds (longer intervals allow data for a greater number of dives)

• Dive data can be uploaded and stored in a dive log format on a desktop or laptop computer using the NiTekLogic™ software and optional PC interface

Introduction

NiTek Plus Dive Computer User Manual 5

Specifications

Algorithm: Buhlmann ZH-L16 Sample tissues: 9 Tissue half-lives: from 5 to 640 minutes Size and weight

Diameter: 2 in (5 cm) Height: 0.6 in (1.5 cm) Weight: 4 ounces (115 g)

Display face

Backlight illumination Low battery indicator Four user buttons Water immersion switch

Depth sensor

Sea water calibration (fresh water depths are about 3% lower) Measuring range: 0 to 325 feet (0 to 99 m) measured every second (Gauge mode 656 feet (200 m) Accuracy: +/- 3% + 2 feet (0.5 m) Surface interval time: from 0 to 48 hrs Diving time: from 0 to 599 minutes Ascent rate warning: 26 to 59 feet per minute (8 to 18 m)

Thermometer

Measuring range: 23 °F to 104 °F (-5 to 40 °C) Accuracy: +/- 4 °F (2 °C) Measurement interval: Every minute

Clock

Accuracy: +/- 30 sec on average per month 24-hour display

Altitude

Altitude function monitoring: from 0 to 19,680 feet (6,000 m) measured every 10 minutes Accuracy: +/- 800 feet (250 meters)

Battery

Li/MnO2 CR 2032 3V button battery Average battery life: About 3 years (50 dives/year) Replacement: Must be returned to manufacturer

Breathing gas

Mixes: 2 gas settings O2 setting range: Mix1 21 to 50 percent, Mix2 21 to 99 percent O2 setting: 1% increments

Dive log

Dive logging: Maximum of 60 dives at 30 seconds Profile logging: Maximum of 30 hours at 30 seconds Profile sampling rates: 15 or 30 seconds

Introduction

6 NiTek Plus Dive Computer User Manual

Warnings

This information has been developed for your safety. Please read and understand this manual completely before using your NiTek Plus dive computer.

Important safety information:

• Before using your NiTek Plus, it is extremely important that you read the following points—as well as similar warning and caution notices that appear throughout this manual. Failure to do so could result in damage to or loss of equipment, serious personal injury, or death.

• The NiTek Plus is designed for use by certified divers who have maintained a sufficient level of knowledge and skill proficiency through a combination of formal training, ongoing study, and experience. It is not intended for use by persons who lack these qualifications and thus, may not be able to identify, assess, and manage the risks scuba diving entails. Use of the NiTek Plus in conjunction with Enriched Air Nitrox (EANx) requires that divers be trained and certified for Nitrox diving.

• The NiTek Plus is not intended for use by commercial or military divers whose activities may take them beyond the commonly accepted depth limits for recreational or technical diving.

• Although the NiTek Plus is capable of calculating decompression stop requirements, users must remember that dives requiring mandatory stage decompression carry substantially greater risk than dives made well within nodecompression limits.

• The NiTek Plus is designed for use by one diver at a time. Divers should not share a single NiTek Plus—or any other dive computer—on the same dive. Additionally, no diver should lend their NiTek Plus to anyone else until it calculates that no measurable residual nitrogen remains after previous dives and no longer displays the “desaturation time” indicator while in time mode. Further, no diver should use their NiTek Plus for repetitive dives—unless that same properly functioning NiTek Plus has accompanied them on

Introduction

NiTek Plus Dive Computer User Manual 7

all previous dives in the same repetitive dive series and is thus, accurately monitoring the diver’s total exposure to oxygen and nitrogen.

• Neither the NiTek Plus—nor any other dive computer— physically measures the amount of nitrogen present in body tissues or the rate at which nitrogen is being absorbed or released. The NiTek Plus monitors depth and time, and uses this data to work a mathematical formula designed to emulate how individuals in good general health and whose physical characteristics do not place them among those at higher risk of decompression illness (DCI) are assumed to absorb and release nitrogen from body tissues. Thus, the NiTek Plus cannot compensate for factors such as age, obesity, dehydration, cold, or exertion, which are believed to place divers at greater risk of DCI. If these, or similar factors apply to you, use the NiTek Plus—and other dive computers or dive tables—with even greater caution.

• Little is known regarding the exact nature and causes of decompression illness (also known as decompression sickness, DCI, or DCS). Susceptibility to DCI may vary substantially from person to person and from day to day. Neither the NiTek Plus—nor any other dive table or computer—can guarantee that you will not suffer decompression illness. Even though you use these items correctly, you may still suffer DCI. Use your NiTek Plus conservatively and in conjunction with other dive planning devices, such as dive tables. Do not rely on the NiTek Plus, or any similar device, as your sole means of avoiding decompression illness.

When diving…

• Do not “push” the no-decompression limits (NDLs). Make safety stops before ascending. If you exceed the nodecompression limits, check your breathing gas supply at all stop depths.

• The NiTek Plus does not monitor breathing gas supply. You must monitor this yourself, on every dive, using a submersible pressure gauge or equivalent device.

Introduction

8 NiTek Plus Dive Computer User Manual

• Do not rely solely on this or any other dive computer. Take a back-up dive computer or dive tables (along with a separate means of monitoring depth and dive time).

• Be aware that the NiTek Plus makes assumptions regarding residual nitrogen based on altitude settings. Avoid making abrupt changes in altitude following a dive, as doing so may be very dangerous.

NiTek Plus Dive Computer User Manual 9

Chapter 2

Using the NiTek Plus

Summary

This chapter provides topics about using, setting, and understanding each of the modes and options of the NiTek Plus.

Content

Getting started • 10 Accessing display modes and screens • 11

Button operation • 11

Time display mode • 12

Setting the time and date • 13 Setting the dual time • 13 Swapping primary and alternate time • 14 Activating the back light • 14

Dive option set and display mode • 15

Using computer mode • 15 Setting Mix1 and Mix2 percentages • 16 Setting the safety factor • 17 Setting for fresh or salt water use • 17 Setting the dive profile sampling rate • 18 Setting the computer for metric or Imperial operation • 19 Understanding FO2 default • 19 Using gauge mode • 21

Plan mode • 23

Plan simulation mode • 24 Alarm display and set mode • 26 Dive computer mode • 28

Primary underwater screen • 28

Second underwater screen • 29

Third underwater screen • 30

Changing gas mixes underwater • 30

Safety stop indication • 31

Warnings while in diving mode • 32 Gauge mode • 37 Log mode • 38 Profile mode • 41 PC transfer mode • 43 Surface mode (upon surfacing from a dive) • 44 Altitude operation • 46

Using the NiTek Plus

10 NiTek Plus Dive Computer User Manual

Getting started

The NiTek Plus has many modes and screens and a number of options that can be changed depending on your dive location and profile. The following is a checklist of general things that you should pay attention to before, during, and after a dive.

Before a dive

• Check that the proper time and date are set. If you traveled, your NiTek Plus may be set to your home time zone.

• Check that the proper mixes are set for mix1 and mix2. If you are using gauge mode, make sure it is set to “gage.”

• Make sure that you review the dive plan mode for maximum depths and times for the mixes you are using

During a dive

• Monitor the NiTek Plus throughout your dive for depth and time

• Monitor the N2 and O2 loading bar graphs

• Pay attention to any alarms, such as an ascent rate warning

• Follow the no-decompression limits or complete the required decompression displayed and perform the necessary safety stop

After a dive

• Monitor surface interval time if making another dive

• Follow the no-fly requirements

• Review your dive using the log mode and profile mode

• Download the dive log to your PC if you have the optional PC interface

Using the NiTek Plus

NiTek Plus Dive Computer User Manual 11

Accessing display modes and screens

There are some display modes that the NiTek Plus enters and/or exits automatically. For example, by taking the NiTek Plus underwater, the dive mode automatically turns on. Upon surfacing, the NiTek Plus automatically enters the time mode.

Accessing other modes or screens requires the use of the NiTek Plus’s buttons.

Button operation

The NiTek Plus has four buttons (lock, select, mode, and set), which are used to access the different modes and screens. To use the buttons, simply press the button once or hold the button down depending on what you are trying to do. What procedure to use is clearly defined in each topic throughout the manual.

• Lock button: This button is used to “unlock” a mode so that options can be changed and “lock” a mode when changes are complete

• Select button: This button is used to select the option field that you want to change

• Mode button: This button is used to select and scroll through the different modes, such as time mode

• Set button: This button is used to set an option’s setting, such as setting the date

Lock Select

Mode Set

The front of the NiTek Plus, showing the four buttons that are used to access and setup the different modes and options

Using the NiTek Plus

12 NiTek Plus Dive Computer User Manual

Time display mode

Time display mode is the NiTek Plus’s default mode. The computer returns to this mode automatically upon surfacing from a dive and from other modes when a period of time has passed without any buttons being pressed.

(1) Day of week: This is the day of the week (Sunday through Saturday) expressed as a two-letter abbreviation.

(2) Time of day: This is the time of day expressed in hours, minutes, and seconds. Time can be displayed in 24-hour (military) format (as shown) or 12-hour format. When in 12-hour format, an A or P appears on the screen, indicating that it is AM or PM.

(3) Dual time: This is an alternate time that can be set for a different time zone (see “Setting an alternate time”). Alternate time only appears if it has been set for a time different than the primary time. A “D.T.” (dual time) is displayed next to the alternate time when an alternate time is set.

(4) Date: This is the month and day. The first digit is the month and the second digit is the day. For example, 6-26 represents the twenty-sixth day of June.

Note: The NiTek Plus may display additional information

concerning exposure to nitrogen and oxygen, desaturation time, surface interval time, and altitude. These items are covered in “Surface mode” and “Altitude operation.”

Using the NiTek Plus

NiTek Plus Dive Computer User Manual 13

Setting the time and date

Setting the time and date are done in the time set mode. You can enter or change the year, month, day, hours, minutes, and seconds in this mode.

To set the time and date:

1. Press Lock while in time display mode.

The “alternate time” field flashes.

Note: To set the alternate time or to swap the primary time

with the alternate time, see “Setting an alternate time” or “Swapping primary and alternate time.”

2. Press Select to select the seconds field.

The “seconds” field flashes.

3. Press Set to “00” the seconds field or press Select to select another field, such as the minutes field.

4. Using Select and Set, set the year, month, day, hour, minutes, seconds, and whether you want the time displayed in 24-hour format.

For example, 1:00 PM would be 13:00.

5. Press Lock.

The computer returns to the time display mode.

Setting the dual time

The NiTek Plus has the ability to display two different times, which can be set for two different time zones.

Using the NiTek Plus

14 NiTek Plus Dive Computer User Manual

To set an alternate time:

1. Press Mode until the arrow points to D.T. at the bottom of the screen.

2. Press Select.

The alternate time field “hour” flashes.

3. Press Set to change the hour.

4. Press Select to select the minutes field.

5. Press Set to change the minutes.

6. Press Lock.

7. Press Mode.

The computer returns to the time display mode.

Swapping primary and alternate time

You can swap the primary time field with the alternate time. This is useful when traveling to a different time zone. The local time can be displayed in the primary time field and the time zone you traveled from can be displayed in the alternate time field. This allows you to monitor the time in both time zones.

To swap primary and alternate time:

1. Press Mode until the arrow points to D.T. at the bottom of the screen.

2. Press Select to swap alternate and primary times.

Activating the back light

The NiTek Plus has a back light that illuminates the screen.

To activate the back light:

1. Press Set.

The back light illuminates for four to five seconds.

2. Press Set again to reactivate the back light.

+ 42 hidden pages

Nitek Dive Rite User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual