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Equipment for Serious Divers®
CO8000
NiTek Q
Computer
User Manual
CO8000 NiTek Q Computer User Manual_Nov 14 2011
www.DiveRite.com
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IMPORTANT WARNINGS
Read this manual carefully before diving with the NiTek Q. It is imperative that you fully understand the functions
and displays of the computer and that you are procient in their use prior to diving.
The NiTek Q is an electronic device and electronic devices can fail. NEVER dive this computer without a back up
device or dive tables.
Before using your NiTek Q it is extremely important that you read and understand each warning, as well as warnings and cautions that appear throughout the manual. Failure to do so could result in damage to or loss of equipment, serious personal injury, or death.
Before diving, you should have the proper training from a qualied instructor and obtain certication from a recognized training agency. Use of the NiTek Q in conjunction with Enriched Air Nitrox (EANx) requires that Q divers
also be trained and certied for Nitrox diving.
If you purchase the Trimix upgrade for your NiTek Q, you should have the proper training from a qualied instructor and obtain certication from a recognized training agency in these specialties.
If you purchase the CCR upgrade for your NiTek Q, you should have the proper training from a qualied instructor
and obtain certication from a recognized training agency in closed circuit rebreather diving.
The NiTek Q is not for commercial or military divers whose activities may take them beyond the commonly accepted depth limits for recreational or technical diving.
You should never share or trade your NiTek Q – or any other dive computer – during a dive. You should never lend
your dive computer to another diver until it fully “clears”, which means that no measurable residual nitrogen remains after previous dives and the computer no longer displays the “desaturation time” indicator. Your computer
gathers information during a dive that is applicable only to you. If you share or trade your computer with another
diver, your decompression limits will be inaccurate, which may cause decompression sickness (DCS).
You should use the same computer for all repetitive dives in the same repetitive dive series, thereby accurately
monitoring your total exposure to oxygen and nitrogen (and helium if you have upgraded to Trimix).
The NiTek Q does not physically measure the amount of nitrogen present in body tissues or the rate at which
nitrogen is absorbed or released. The NiTek Q monitors depth and time and uses this data to work a mathematical formula designed to emulate how individuals in good general health, whose physical conditions do not place
them at a higher risk of DCS, are assumed to absorb and release nitrogen from body tissues. This computer cannot compensate for factors such as age, obesity, dehydration, cold, or exertion, which experts believe place divers
at greater risk of DCS. If these factors apply to you, use the NiTek Q, any other dive computer, or dive tables with
greater caution.
You should never dive with Nitrox (EANx) unless you have personally veried the oxygen percentage in your tanks
and correctly entered the %O2 into your dive computer. Failing to verify the oxygen percentage or entering the
wrong percentage could lead to serious injury or death.
If you have upgraded your NiTek Q to Trimix, you should never dive with Trimix unless you have personally veried the oxygen and helium percentage in your tanks and correctly entered the% O2 and %HE into your dive
computer. Failing to verify the oxygen and helium percentage or entering the wrong percentages could lead to
serious injury or death.
You should never y after diving until you verify that no measurable residual nitrogen remains after previous
dives and the computer no longer displays the “desaturation time” indicator. Flying during the no-y time can
result in decompression sickness (DCS).
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Table Of Contents
WARNINGS..............................................................................................................................................................
Product Description............................................................................................................................................
Support...............................................................................................................................................................
Specications....................................................................................................................................................
Battery......................................................................................................................................................................
Using The NiTek Q................................................................................................................................................
Button Operation and Navigation.............................................................................................................
Sleep Mode........................................................................................................................................................
Surface Mode....................................................................................................................................................
Date and Time...................................................................................................................................................
Menus.......................................................................................................................................................................
Dive Option SET Mode...................................................................................................................................
PLAN Mode.............................................................................................................................................................
LOG Mode...............................................................................................................................................................
PROFILE Mode.......................................................................................................................................................
PC Mode..................................................................................................................................................................
Dive Mode...............................................................................................................................................................
Primary Underwater Screen.........................................................................................................................
Second Underwater Screen.........................................................................................................................
Changing Gas Mixes Underwater...................................................................................................................
Surface Mode (Upon Surfacing From A Dive)............................................................................................
Desaturation Time..............................................................................................................................
Surface Interval Time.........................................................................................................................
Oxygen Limit Index (OLI) Bar Graph............................................................................................
Pressure Gas in Tissue (PGT) Bar Graph......................................................................................
Altitude Operation...............................................................................................................................................
WARNINGS While in Dive Mode......................................................................................................................
Ascent Rate Warning.........................................................................................................................
P02 Limit Warning..............................................................................................................................
OLI (Oxygen Limit Index) Warning................................................................................................
Decompression-Stop Violation Warning....................................................................................
Care and Maintenance.......................................................................................................................................
Warranty Information.........................................................................................................................................
Accessories for Your NiTek Q............................................................................................................................
Appendix A - Trimix Upgrade...........................................................................................................................
Appendix B - CCR Upgrade...............................................................................................................................
Appendix C - Custom Gradient Factor Upgrade.......................................................................................
Appendix D - Compass Upgrade....................................................................................................................
CO8000 NiTek Q
How to Check The Charge Status..........................................................................................................
Charging Your Battery...............................................................................................................................
SET Screen One.............................................................................................................................................
Maximum Operating Depth (MOD)..................................................................................................
Programming Gas Mixes.......................................................................................................................
SET Screen Two.............................................................................................................................................
Setting the Maximum Depth Alarm...........................................................................................
Setting the Maximum Time Alarm................................................................................................
SET Screen Three..........................................................................................................................................
Setting Your Conservatism/Gradient Factor..............................................................................
Setting For Metric or Imperial Operation...................................................................................
Setting the Dive Setting Log/Prole Sampling Rate..............................................................
Setting for FRESH or SEA Water Use.............................................................................................
SET Screen Four...........................................................................................................................................
Setting Brightness Control...................................................................................................................
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PRODUCT INFORMATION
Congratulations on your NiTek Q computer purchase.
Your NiTek Q has been designed, manufactured, and tested for the highest possible performance and reliability. With
proper use and maintenance outlined in this manual it will provide you with many years of outstanding service.
Web Resources: As you read through the manual, watch for pointers and helpful tips from the Dive Rite
pros. To access our complete library, interactive Solution Finder, and helpful videos at
Dive Rite TV, go to www.DiveRite.com
For product updates and new product release notications, SIGN UP for the Dive Rite Newsletter
and follow us on Facebook at http://www.facebook.com/DiveRiteTechGear.
Product Description
This two-gas Nitrox dive computer is for recreational diving, and
provides information on depth, dive times, no-decompression
limits, decompression obligations, and nitrogen and oxygen absorption and elimination during all dive phases (including ascent,
surface interval times, and subsequent dives). Using the well established Buhlmann ZLH16 algorithm along with a default gradient
factor of 30/75, the NiTek Q has three pre-set GF settings to choose
from that allow for deep stops or shallow stops.
Housed in a mil-spec aluminum case with a mineral glass viewing
port, the OLED face provides an easy-to-read display for intuitive,
push-button navigation. The Q has an always-on screen and comes
with a number of modes including a power-saving sleep mode, SET
mode, PLAN mode, DIVE mode, LOG and PROFILE modes, PC mode
for planning dives and mixes on either a PC or a MAC, and a TIME
mode (which includes the Date).
Freedom of Choice
The NiTek Q gives you the freedom to choose additional features as your skills grow and your equipment changes. The
Q diver can upgrade to normoxic and hypoxic Trimix, closed circuit rebreather, digital compass, custom gradient factors, and the Workbench logbook program that allows you to upload your dives to any PC or MAC. You only pay for the
features you will use and can upgrade to additional features at any time. Contact us at Dive Rite at Qunlocks@diverite.
com to upgrade your NiTek Q and then simply connect to the desktop planner/workbench via any standard USB port to
unlock the features you have added.
Using Your Upgrades
Instructions on how to use your NiTek Q once you’ve unlocked any of the optional upgrades can be found in appendices
at the end of this manual. Because certain modes and screens will oer new information and/or require additional programming based on your upgrade, icons throughout the manual will indicate when to reference the appendix.
Trimix icon – refer to Appendix A
CCR icon – refer to Appendix B
It is extremely important that you carefully read and understand this manual before diving your NiTek Q.
SUPPORT: All Dive Rite products receive our commitment to excellence in customer service from your fellow divers.
Contact us with any questions at support@diverite.com or phone at 800-495-1046, Monday through Friday, 9 AM-4 PM,
Eastern Standard Time.
GF icon – refer to Appendix C
Compass icon – refer to Appendix D
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TECH SPECS
Includes:
Self-donning ladderlock wrist strap
USB Cable
120V US AC charger
Specications:
Algorithm: Buhlmann ZH-L16
Three pre-set gradient factors: 30/75 (default), 40/100 or 75/95
Optional custom gradient factor upgrade
Sample tissues: 16
Tissue half-lives: from 5 - 640 minutes
Size and weight
Length: 3.5” (8.9 cm)
Height: 1.25” (5.7 cm)
Thick: 1” (2.54 cm)
Weight: 9 oz. (255 g)
Display face
Yellow OLED always-on
Visible in complete darkness
Scratch-resistant mineral glass
Low battery indicator
Two user buttons
Visual alarms
Imperial or metric
Depth Sensor
Sea and freshwater calibration
Rated to a depth of 492 feet (150 meters) - measured every second
Accuracy: +/- 3% + 2 feet (0.5 meters)
Surface interval time: from 0 - 24 hours
Diving Time: from 0 - 699 minutes
Ascent rate warning: Depth Range Ascent Rate
0-19 feet (0-5.9 meters) 26 feet (8 meters) per minute
20-58 feet (6-17.9 meters) 39 feet (12 meters) per minute
59 feet (18 meters) or deeper 52 feet (16 meters) per minute
Clock
Accuracy: +/- 30 seconds on average per month
24-hour display
Daytime with seconds and hr.min.sec or total min.sec
Thermometer
Measuring range: - 40° F - 176 F (- 40° C - 85° C)
Accuracy: +/- 4° F ((2° C)
Measurement interval: every second during the dive
Altitude
Altitude function monitoring: from 0 to 19,685 feet (6,000 meters)
Battery
Lithium polymer 3.7V rechargeable
Average battery life: About 3 years (50 dives per year)
USB cable included
120v US AC charger
Breathing Gas
Mixes: 2
02 setting range: 8 - 99%
02 settings: 1% increments
Optional 3-gas normoxic Trimix ((21%-99% O2, 0-79% He)
Optional 7-gas hypoxic Trimix (8%-99% O2, 0-92% He)
Dive Log
Dive logging: Minimum of 15 hours, depending on settings
Prole sampling rates: 15 or 30 seconds
Uploadable via standard USB cable, included
Optional Workbench logbook program
Optional Accessories
Bungee wrist mount
Carrying case
Screen protector
Replacement USB cap / o-ring service kit
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USING THE NiTek Q
Battery and Charge Set-up
Your NiTek Q uses a rechargeable Lithium polymer battery
that is sealed inside the housing. You will need to check the
battery level and fully charge the battery before the rst use
(and afterwards, as needed). The best battery life will come
from keeping the battery charged. A full charge will last for
approximately 20 hours of dive time (depending on screen
brightness settings). The battery will last for several years of
normal use before gradually diminishing in capacity, and can
be replaced by Dive Rite or an authorized Dive Rite Dealer.
How To Check Battery Status
Press either the A or B button to bring the computer out of
sleep mode. The Home screen will display for a few seconds
and then automatically advance to the SURFACE screen.
The icon showing the battery charge status is displayed just
above the date. If the battery shows a full charge, you are ready
to program your computer and make a dive. If not, you will
need to charge it.
Charging Your Battery
The NiTek Q can be charged with either the included AC charger or from any USB connector. To access the charging port,
use a coin and turn the cap a quarter turn counter clockwise to align the groove on the battery cap with the groove on
the computer case. When this groove is aligned the battery cap is no longer sealed. Plug the charger into an AC outlet or
USB connection and then into the port on the computer. The battery symbol is animated to indicate charging. Periodically disconnect the charging cable and check the number of bars - a solid battery symbol indicates a full charge. Upon
full charge, reinsert the battery cap and using a coin turn the battery cap a quarter turn clockwise to seal. Do not dive
the computer unless the battery cap is sealed.
Battery Charge Indicator
SURFACE Mode Screen
MAINTENANCE TIP: To ensure your computer stays watertight, it is important to inspect the USB plug o-ring periodi-
cally. Check for dirt and grit and clean o the o-ring if anything is found. Use of the correct o-ring is critical to a proper
seal. Using the wrong o-ring could allow the computer to ood.
Never replace the o-ring with anything but one supplied by Dive
Rite in a service kit.
Using The NiTek Q
Button Operation and Navigation
Navigating the menus of the Q is intuitive: the left (A) button and
the right (B) button are used in the same way across all screens.
Press A to scroll
Press B to select
Press A to conrm the choice and advance to the
next option
A B
Sleep Mode
The computer automatically hibernates after 10 minutes of disuse to conserve battery use. To bring the computer out of
hibernation, press either A or B button. To extend the battery charge, put the computer back into hibernation whenever
it is not in use. To do this, press and hold the A button to return to the Surface mode screen. Then press the B button for
2-3 seconds.
HOME Screen
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USING THE NiTek Q
SURFACE Mode
The SURFACE mode is the NiTek Q’s default screen. At
the surface, the computer automatically returns to this
mode from any other screen after 20 seconds, (slightly
longer than 20 seconds when in prole and compass
modes). Upon surfacing from a dive, the computer also
returns to the SURFACE mode screen, and displays additional post-dive information (see page 16).
To manually return to the SURFACE mode, press and hold
the A button for 2-3 seconds.
Date
Battery Charge Indicator
Time
The SURFACE mode displays battery charge status, date,
time, choice of FRESH or SEA calibration, and the rst gas
mix you will use when diving.
MIX #
P02
SURFACE Mode Screen
02%
FRESH or
SEA
Calibration
Date and Time
IMPORTANT! The date and time must be correctly set in
order to accurately track your dives. Setting the date and
time enables the NiTek Q to keep track of dives chronologically. The internal clock is also used for decompression
calculations. If you travel to a dierent time zone, set the
local time before diving. The time and date will have to be
reset if the battery becomes completely discharged.
Date: This is the month and the day. The rst digit is the
month and the second digit is the day. The “07” represents
July and “12” represents the 12th day of the month. “2011”
represents the year.
Time: This is the time of day expressed in hours, minutes,
and seconds. Time can also be displayed in a 24-hour clock (military time). The “10” represents elapsing seconds, “19”
represents minutes after the hour, and “06” represents the hour of the day.
TIME Mode Screen
Setting the Date and Time
Setting the date and time are done in the TIME mode. You can enter or change each element in this mode.
From the SURFACE mode, scroll through the menus to the TIME mode screen pressing the A button. The seconds will be
ashing.
1. Press the B button to enter the TIME mode.
2. Press the B button to reset the seconds to 00.
3. Press the A button to scroll to minutes.
4. Press the B button to set the accurate time.
5. Press the A button to lock in your time. To exit, press and hold the A button for 2-3 seconds to return to the Sur face mode.
Continue setting the hours, year, day, and month using the A and B buttons as directed above.
To change to 24-hour (Military) time, press the B button when “PM” is ashing.
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MENUS
Menus
Dive Option SET and Display Mode
The dive option SET and display mode is where all “dive” settings are programmed including your P02 alarm for each gas,
%02, the maximum safe operating depth (MOD), an optional maximum depth alarm, a maximum dive time alarm, conservatism/gradient factor options, a sampling rate for the log book, the FRESH or SEA water option, and screen brightness
control. When the computer is in this mode, “SET” is displayed in the lower left hand corner of the screen.
There are four SET screens that are used to set up your entire dive planning options.
SET Screen One is where you will program your mixes, including the following options:
1. MIX Number – This is the mix number you are setting.
2. P02 Setting – This is the P02 setting for the mix num ber selected. It can either be 1.4 or 1.6.
3. F02 – This is the oxygen percentage for the mix num ber selected. The 02 range is 21%-99%.
Your maximum operating depth (MOD) is also displayed on SET
Screen One. The MOD is the safe operating depth (maximum)
for the mix selected and will automatically update to reect the
chosen P02 limit (either 1.4 or 1.6).
SET Screen One
To enter the Dive SET mode from the Surface screen:
1. Press the A button until “SET is displayed.
2. Press the B button to enter the dive set up option screen. The MIX number will be ashing.
Programming Gas Mixes
When you have entered the Dive SET mode and the MIX number is ashing:
1. Press the B button to change to the desired mix number that you want to set or change.
2. Press the A button to set the mix number. The computer will automatically advance to the P02 set/alarm option.
3. Press the B button to toggle between 1.4 and 1.6.
4. Press the A button to set the maximum P02 for this mix. The computer will automatically advance to the %02
option.
5. Press the B button to select your %02 for this mix.
6. Press the A button to lock in your %02 and the computer will automatically advance to SET screen two. To exit,
press and hold the A button for 2-3 seconds to return to the Surface mode.
NOTE: Up to two dierent gas mixes can be programmed, but if you are only using one mix, you only need to set MIX 1.
The NiTek Q starts the dive on the last gas mix used or viewed in the SET mode, not on MIX 1. Be sure to check and set
your mix number before your dive.
It is strongly recommended that you use either a secondary computer or dive tables as a backup to the NiTek Q.
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MENUS
SET Screen Two - The NiTek Q has maximum depth and time alarms
that can be set on SET Screen Two. These alarms will be activated
when the diver reaches selected presets. When the maximum depth
is reached, the current depth indicator will ash until you ascend to a
depth that is shallower than the maximum depth you have set. The
Maximum Depth alarm can be set from 0 – 492 feet (0-150 meters).
When the maximum dive time is reached, the dive-time and maximum dive-time alarm indicators will continue to ash until after you
surface.
Setting the Maximum Depth Alarm
SET Screen Two
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option
screen (SET Screen One).
3. Repeatedly press the A button until the screen changes to SET Screen Two and the maximum depth is ashing in
the upper left portion of the screen.
4. Press button B to select the depth at which you want the alarm to activate.
5. Press button A lock the depth and advance to the Maximum Depth Alarm “ON/OFF” indicator in the center left
portion of the screen. This will be ashing.
6. Press button B to toggle the alarm “ON” or “OFF”.
7. Press button A to lock your selection and advance to the Dive Time Alarm option. To exit, press and hold the A
button for 2-3 seconds to return to the SURFACE mode.
Setting the Maximum Dive Time Alarm
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option screen (SET Screen One).
3. Repeatedly press the A button until the screen changes to SET Screen Two and the maximum dive time is ash ing in the upper right portion of the screen.
4. Press button B to set the time when you want the alarm to activate.
5. Press button A to lock the time and advance to the Maximum Time Alarm “ON/OFF” indicator in the center right
portion of the screen. This will be ashing.
6. Press button B to toggle the alarm “ON” or “OFF”.
7. Press button A to lock your selection and advance to the Conservatism/Gradient Factor option. To exit, press and
hold the A button for 2-3 seconds to return to the Surface mode.
SET Screen Three – This SET screen allows you to choose one of three preset Conservatism/Gradient Factors, whether you
wish your computer to display depth in feet or meters (Imperial or Metric), the sampling rate for the computer log
and prole, and whether the computer will calibrate for FRESH or SEA water.
Setting Your Conservatism/Gradient Factor
The NiTek Q uses the Buhlmann ZLH16 algorithm, a default gradient
factor (GF) of 30/75, and two additional pre-set GF options that allow
for deep stops or shallow stops.
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option
screen (SET Screen One).
3. Repeatedly press the A button until the screen scrolls
through SET Screens One and Two and changes to SET
Screen Three. CONS2, CONS1, or CONS0 will be ashing
in the upper left portion of the screen.
SET Screen Three
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MENUS
4. Press the B button to toggle through the selections.
• CONS2 = 30/75 (default/most conservative)
• CONS1 = 40/100
• CONS0 = 75/95
5. Press the A button to lock in your choice and advance to the Imperial/Metric option. To exit, press and hold the A
button for 2-3 seconds to return to the Surface mode.
Web Resource - Learn about setting custom gradient factors in Dive RIte’s library at:
http://www.diverite.com/education/library/articles/
Setting the Computer for Metric or Imperial Operation
The NiTek Q can calculate and give you values in Imperial units or Metric units. When in Imperial, depth values are expressed in feet. When in Metric, depth values are expressed in meters.
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option screen (SET Screen One).
3. Repeatedly press the A button until the screen scrolls through SET Screens One and Two, changes to SET Screen
Three and “ft” or “m” is ashing.
4. Press the B button to toggle between ft (feet) and m (meters).
5. Press the A button to lock in your choice and advance to the Sampling Rate option. To exit, press and hold the A
button for 2-3 seconds to return to the Surface mode.
Setting the Dive Log/Prole Sampling Rate
The NiTek Q allows you to choose how frequently it samples and stores depth and time data. These snapshots of your
dive data are used in the LOG and PROFILE mode, as well as when data is uploaded to a personal computer. The Q can be
programmed to sample your data every 15 seconds or every 30 seconds. The 30-second sampling rate is the computer’s
default setting.
The 15-second sampling rate provides a more detailed dive prole, but because it stores more information, fewer dives
can be stored.
The 30-second sampling rate provides a less detailed dive prole, but it is capable of storing more information for more
dives.
NOTE: When the computer’s memory storage is full, it overwrites the oldest dive prole data stored with the new information.
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option screen (SET Screen One).
3. Repeatedly press the A button until the screen scrolls through SET Screens One and Two, changes to SET Screen
Three and Dive Prole Sampling Rate is ashing.
4. Press the B button to toggle between 15 and 30 seconds.
5. Press the A button to lock in your choice and advance to the FRESH or SEA calibration option. To exit, press and
hold the A button for 2-3 seconds to return to the Surface mode.
Setting for FRESH or SEA (Salt) Water Use
Before going diving, you will need to set your computer for the type of water you will be diving in – either fresh or salt.
This allows for the most accurate calculations that determine your no-decompression limits and decompression stops.
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MENUS
These calculations are based on:
• One atmosphere of saltwater = 33 feet (10 meters)
• One atmosphere of freshwater = 34 feet (10.3 meters)
To set for FRESH or SEA Water Use:
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option screen (SET Screen One).
3. Repeatedly press the A button until the screen scrolls through SET Screens One and Two, changes to SET Screen
Three and “FRESH” or “SEA” is ashing.
4. Press the B button to toggle between the two.
5. Press the A button to lock in your choice and advance to SET Screen Four. To exit, press and hold the A button for
2-3 seconds to return to the SURFACE mode.
SET Screen Four is where you will nd and program the brightness of the text and numbers displayed on the screen.
Setting Brightness Control
1. Press the A button until “SET” is displayed.
2. Press the B button to enter the dive set up option screen (SET Screen One).
3. Repeatedly press the A button until the screen scrolls through SET Screens One, Two, and Three and changes to
SET Screen Four where the brightness number is ashing.
4. Press the B button to change the brightness. When you are satised with the display brightness, press the A
button to advance to the MIX number option. To exit, press and hold the A button for 2-3 seconds to return to
the SURFACE mode.
PLAN Mode
PLAN mode is a dive-planning tool that enables you to determine how long you can stay at various depths while
remaining within no-decompression limits (NDL). The
no-decompression limits are based on the mix that is currently displayed. If you are making a dive within 24 hours of
a previous dive, the no-decompression limits are adjusted for
residual nitrogen.
The two most important values that are displayed on the
screen in PLAN mode are the depth and no-decompression
time limit.
1. Depth - When you rst enter PLAN mode, the initial
depth displayed is 30 feet (9 meters). You can ad vance the depth in 10-foot (3-meter) increments. Fifteen dierent dive plan increments can be displayed to a
maximum depth of 170 feet (51 meters).
2. No-decompression limit (NDL) - The no decompression limit is dependent upon the depth displayed and the
current %02 (F02) setting. The NDL is displayed in minutes and is found in the upper right portion of the PLAN
mode screen.
If the NiTek Q calculates that there is residual nitrogen present from previous dives, your no-decompression limits will be
shorter. Depending on how much residual nitrogen is present, there may not be a NDL time for some deeper depths. If
this takes place, the Q will display a series of horizontal dashes. Similarly, if a combination of depth and F02 would cause a
diver to exceed the selected P02 limit (either 1.4 or 1.6), a series of horizontal dashes appear in the place of the no-decompression limit.
PLAN Mode Screen
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MENUS
Using the PLAN Mode
1. Repeatedly press the A button until “PLAN” is displayed.
2. Press the B button to enter the PLAN mode screen.
3. Press the B button to advance the depth. The no-decompression time limits change automatically based on the depth.
4. When nished, press and hold the A button return to the SURFACE mode.
Do not plan dives to depths deeper than those for which the NiTek Q is capable of displaying an available no-decompression limit. Doing so could cause you to exceed the no-decompression limits or a limiting P02 of 1.4 or 1.6 atmospheres.
This may increase your risk of decompression sickness or central nervous system (CNS) oxygen toxicity and can lead to
serious personal injury or death.
LOG Mode
The NiTek Q stores information, such as depth, time, and gases, for every dive in a log. This stored information can be
viewed on screen in the LOG mode. The logbook stores a minimum of 15 hours, depending on settings. Each dive is assigned a log number and the date the dive is made, making it easy for you to toggle between the dive log pages.
1. Log Entry Number – This is the sequence in which the log
appears. The most recent log entry has the lowest log num ber, beginning with Log 1. When the computer’s memory
is full, the oldest dives are overwritten with the new dives.
This causes the log entry number assigned to an earlier dive
to change.
2. Max Depth – This is the maximum depth reached dur ing the dive.
3. Date – This is the month and day of the dive.
4. Dive Time – This is the actual bottom time for the dive.
5. F02 Gas Percentage – This is the %02 that you entered
for the dive. All calculations were based on this percentage.
To View the Dive Log
1. Repeatedly press the A button until “LOG” is displayed.
2. Press the B button to enter the LOG mode screen.
3. Press the B button change to the log page displaying your most recent dive, -OR Repeatedly press the B button to scroll through the logged dives from the newest to the oldest. To rapidly scroll,
press and hold the B button.
4. When nished, press and hold the A button return to the SURFACE mode.
LOG Mode Screen
PROFILE Mode
PROFILE mode enables you to see a graphic representation of your dive. The NiTek Q can display a detailed prole of
each dive stored in your log showing the depths you reached at various points during your dive. When a dive is selected,
the computer automatically displays the depth and the time during the dive when you reached that depth until it reaches
the end of the dive.
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MENUS
Dive prole information is either stored in 15-second or 30-second intervals during a dive. This must be set prior to making your dive. Refer to “Setting the Dive Log/Prole Sampling Rate” on page 10 for step-by-step instructions.
The dive number and date of the dive are displayed when you scroll through your dives, making it easy to nd the dive
prole you want to view.
1. Dive Log number – This is the dive number that corresponds
to the dive number when in LOG mode.
2. Max Depth – This is the maximum depth reached during the dive.
3. Dive Time – This is the actual bottom time for the dive.
To View a Dive Prole
1. Repeatedly press the A button until “PROF” is displayed.
2. Press the B button to enter the PROFILE mode screen.
3. Press the B button change to the prole page displaying
your most recent dive, -OR Repeatedly press the B button to scroll through the dive
proles from the newest to the oldest. To rapidly scroll,
press and hold the B button.
4. When nished, press and hold the A button return to the
SURFACE mode.
PROFILE Mode Screen
PC Mode
Workbench dive software allows the Q diver to perform dive planning on either a PC or MAC. An optional upgrade to the
Workbench Logbook allows you to upload dive data using a USB interface cable and view dive proles.
Before connecting the USB interface cable to your computer, be sure to download the NiTek Q Workbench TM software
rst.
For more information about how to purchase Workbench Logbook software, contact Dive Rite at Qunlocks@diverite.com.
To Enter PC Transfer Mode
1. Using a coin, remove the USB cap from the back of the NiTek Q and attach the USB interface cable to the connector.
Be sure no water gets into the compartment.
2. Connect the other end of the cable to an internet-compatible PC or MAC computer with NiTek Q Workbench TM
software installed.
3. Repeatedly press the A button on the NiTek Q until “PC” is displayed in the lower left portion of the screen.
4. Press the B button to enter the PC mode screen. “USB” Communicating” is displayed on the screen.
5. Your dive log data will automatically transfer to your PC or MAC.
6. When nished, press and hold the A button for 2-3 seconds to return to the SURFACE mode.
Web Resource - For detailed instructions on how to use Workbench Logbook visit Dive RIte’s library at:
http://www.diverite.com/education/library/articles/
DIVE Mode
The DIVE computer mode is automatically entered when the computer enters the water. It begins performing its dive
calculations once you descend below 5 feet (1.5m). While in DIVE mode, the computer calculates and displays informa-
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DIVE MODE
tion about your dive and prompts you with safety stop information and warnings, if needed. When diving, there are two
screens you can toggle between, and you can switch to dierent gas mixes, when needed.
Primary Underwater Screen
The primary underwater screen in DIVE mode displays your depth, remaining no-decompression time, dive time, max
depth, mix P02, 02 percentage, mix number, and OLI (oxygen limit
indicator) and PGT (pressure gas in tissue) bar graphs, which are
graphic representations of your “CNS clock”.
1. Depth – This is your current depth.
2. Maximum Depth – This is the maximum depth you have
reached during your dive.
3. P02 – This is the partial pressure of 02 at your current depth.
It is based on the F02 settings for the mix selected.
4. 02 (OLI) Bar Graph – This is the oxygen limit index (OLI)
that calculates the cumulative eect of your exposure to
elevated partial pressures of oxygen (P02). This bar
graph can display up to nine bars. If all bars are displayed,
it means that you have used 100 percent of your “CNS”
clock triggering a visual warning. This graph increases when
you descend due to higher partial pressures and may decrease
when you ascend.
OLI
Bar
Primary Underwater Screen
PGT
Bar
VISUAL WARNING
Oxygen Limit Index (OLI) Warning
The OLI warning accounts for the intensity and length of your exposure to partial pressures of oxygen. When 7 of the OLI
bars are displayed, the OLI graph ashes as a warning to ascend to a shallower depth. If you fail to heed this warning and
all 9 of the bars are displayed, the graph continues to ash until you ascend to a shallower depth and the graph drops to
seven bars.
5. Dive Time – This is the time spent (in minutes and seconds) underwater, measured from the time you descended
below 5 feet (1.5 meters).
6. Remaining No-Decompression Limit (NDL) – This is the time that is remaining (in minutes) before you reach the
no-decompression limit. This NDL time limit increases as you ascend and decreases as you descend.
7. Mix Number – This is the mix number for which the computer is currently calculating dive data.
8. 02 Percentage – This is the oxygen percentage programmed for the mix number that is displayed.
9. PGT Bar Graph – This is how much nitrogen the computer calculates your body has absorbed. There are a
maximum of 9 bars. If all 9 bars are displayed, it means that you are at or have exceeded the no-decompression
limit triggering a visual warning.
VISUAL INDICATOR
Pressure Gas in Tissue (PGT) Limit Indicator
The PGT limit indicator alerts you to the fact that you are approaching or have approached the no-decompression limit.
When 7 of the 9 bars are displayed, the PGT graph ashes to indicate that you must ascend to a shallower depth to avert a
decompression obligation. If all nine bars are displayed, the NiTek Q will change to the decompression mode.
When Diving
Do not “push” the no-decompression limits (NDL’s). Make safety stops before ascending. If you exceed the no-decompression limits, check your breathing gas supply at all decompression stop depths.
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DIVE MODE
The NiTek Q does not monitor breathing gas supply. You must monitor this yourself, on every dive, using a submersible pressure gauge or
equivalent device.
Decompression
If you exceed the no-decompression limits during a dive, the computer
enters the decompression mode. This indicates that you will have to limit
your ascent time and enter a series of one or more decompression stops.
PGT
Bar
1. Deco Stop Symbol – The “DECO” symbol displays indicating
that you have to stop at the depth displayed.
2. Required Stop Depth – This is the required decompression
stop depth.
3. Required Stop Time – This is the time (in minutes) you must remain at the indicated stop depth.
4. Total Ascent Time – This is the total amount of time (in minutes) you must spend at the decompression stops and
the ascent time between decompression stops.
5. PGT Bar Graph – This visual indicator continues to monitor the calculated nitrogen in your body tissues during
decompression.
Decompression diving is considered to substantially increase your risk of decompression sickness (DCS).
Second Underwater Screen
While underwater, you can change to the second DIVE mode screen that displays additional information. When you
switch screens, the current depth, conservatism/gradient factor, time of day, temperature, and strip compass are displayed.
1. Dive Time – This is the current time of day.
2. Maximum Depth – This is the maximum depth that you
have reached on this dive.
3. Temperature - This is the current water temperature.
4. Strip Compass – This is inactive unless you have purchased
the compass upgrade.
Primary Underwater Screen
Decompression Symbol
To Display the Second Underwater Diving Mode Screen
1. Press and hold the B button.
2. Release the B button to return to the primary diving mode
screen.
Changing Gas Mixes Underwater
Because the NiTek Q has the ability to use two (or more if upgraded) dierent gas mixes during a dive, you need the ability to switch between these mix settings while underwater. When you switch mix settings, the P02 adjusts to reect the
current mixture you are breathing.
The NiTek Q starts the dive on the last gas mix used or viewed in the SET mode, not on MIX 1. Be sure to check and set your mix
number before your dive.
Only switch gas mixes when you have reached the safe operating depth limit for the gas to which you are switching.
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DIVE MODE
To Change Gases Underwater
1. Press the A button. The mix number will ash.
2. Press the B button to select a mix number. The 02 percentage will change to the programmed mix and the P02
indicator will change to reect the P02 set for the selected mix.
NOTE: Only the mix numbers that have been programmed with a gas mixture are available.
3. Press the A button to lock in the mixture and return to the primary diving mode.
NOTE: You cannot lock in a mix if it causes you to exceed a P02 of 1.4 or 1.6 atmospheres, depending on which
P02 you selected in the SET mode.
SURFACE Mode Upon Surfacing From a Dive
Once you surface from a dive, the NiTek Q automatically switches to
the SURFACE mode after 1 minute. However, if your surface interval
is less than 10 minutes, the NiTek Q will continue the dive and it will
be logged as a single dive.
OLI
In addition to the SURFACE mode information displayed as described on page 7, new information is displayed on the SURFACE
mode screen following each completed dive:
• Desaturation Time
• Surface Interval Time
• Oxygen Limit Index (OLI) Bar Graph
• Pressure Gas in Tissue (PGT) Bar Graph
Bar
SURFACE Mode Screen
Following A Dive
PGT
Bar
This information is displayed on the screen until the NiTek Q calculates that it is no longer needed or after 24 hours have
passed since the dive.
NOTE: If you are making repetitive dives, you need to pay close attention to your surface interval and use it in conjunction with the PLAN mode. This will ensure that you stay within no-decompression limits.
1. Desaturation Time – This is the amount of time, expressed in hours and minutes, that must pass before the re-
sidual nitrogen levels drop to a point where subsequent dives are treated as single (non-repetitive) dives. This is
not the same as “time to y” time. On the NiTek Q, DESAT times are displayed until completely desaturated.
2. Surface Interval Time – This is the amount of time you have spent on the surface since your last dive if there is
residual nitrogen present from a previous dive. It is displayed up to 24 hours of surface interval time.
3. OLI Bar Graph – This indicates the CNS toxicity level at the end of the dive. This drops as your surface interval
time increases.
4. PGT Exposure Bar Graph – This is the amount of residual nitrogen in your body at the end of the dive. This drops
as your surface interval time increases.
It is recommended that you wait at least 24 hours following any dive before ying in an aircraft or driving to altitude. Failure to allow sucient surface interval time before doing so may increase your risk of decompression sickness (DCS).
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DIVE MODE
Altitude Operation
The NiTek Q adjusts automatically for diving at altitude. The Q monitors altitude information in all modes, except PC
transfer mode. Upon arriving at altitude, the NiTek Q’s PGT bar graph may show that there is excess nitrogen present,
even though you may not have made any dives in the preceding 24 hours.
If you have obtained altitude specialty diver training (which everyone should do before diving at altitudes substantially
above sea level), you already understand that this is to be expected. By ascending to a higher altitude from a lower one,
your body has more nitrogen saturated in body tissues than would be present had you spent the preceding 24 hours at
the higher altitude. By displaying residual nitrogen and a surface interval, your NiTek Q is merely reecting this fact.
When traveling by air, be sure to carry the NiTek Q in your hand luggage or the pressurized cabin, not the cargo hold.
Otherwise, the NiTek Q could enter dive mode while ying.
WARNINGS While In DIVE Mode
While in Dive mode, there are several visual warnings that you
should be alert to and heed.
• Ascent Rate Warning
• P02 Limit Warning
• OLI (Oxygen Limit Index) Warning
• Decompression-Stop Violation Warning
Ascent Rate Warning
If your ascent rate exceeds the following limits, “SLOW” ashes on
the screen and will continue until you slow your ascent to an acceptable rate or you reach 5 feet (1.5 meters).
Depth Range Ascent Rate
0-19 feet (0-5.9 meters) 26 feet (8 meters) per minute
20-58 feet (6-17.9 meters) 39 feet (12 meters) per minute
59 feet (18 meters) or deeper 52 feet (16 meters) per minute
P02 Limit Warning
The P02 warning indicates that you have exceeded 1.4 or 1.6 atmospheres for the gas you are breathing, which can lead to severe
injury or death. If you exceed the P02 setting, the P02 symbol and
the P02% will ash. Ascend to a shallower depth until the warning
indicator stops ashing.
OLI (Oxygen Limit Index) Warning
The OLI warning accounts for the intensity and length of your exposure to partial pressures of oxygen. When seven of the OLI bars
are displayed, the OLI graph ashes as a warning to ascend to a
shallower depth. If you fail to heed this warning and all nine of the
bars are displayed, the graph continues to ash until you ascend to
a shallower depth and the graph drops to seven bars.
Primary Underwater Screen
Ascent Rate Warning
Primary Underwater Screen
P02 Limit Warning
Primary Underwater Screen
OLI Rate Warning
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CARE & MAINTENANCE
Decompression Stop Violation Warning
A decompression stop violation warning is triggered when you ascend to a shallower depth than the indicated stop depth or if you
do not spend sucient time at the required depth before ascending. If you violate the decompression obligation, the computer’s
“DECO” symbol will ash and continue to ash as long as you
remain shallower than the indicated stop depth.
If you do not correct an indicated deco stop violation, the warning
continues for several minutes after surfacing. At this point, the
computer will display a “Decompression Violation” warning with a
countdown timer beginning at 24 hours.
Primary Underwater Screen
Decompression Stop Violation Warning
Dive Checklist
Before A Dive
• Check that the proper time and date are set. If you are traveling, your NiTek Q may still be set to your home time zone.
• If you have upgraded to CCR, check that the proper mixes and modes are set. Ensure that you are in either the
open-circuit (O/C) mode or closed-circuit mode (C/C) when programming your NiTek Q.
• Make sure that you review the dive plan mode for maximum depths and times for the mixes you will use.
During A Dive
• Monitor the NiTek Q throughout your dive for depth and time.
• Monitor the Pressure Gas in Tissue (PGT) and Oxygen Limit Indicator (OLI) 02 loading bar graphs.
• Follow the no-decompression limits or complete the required decompression displayed.
After A Dive
• Monitor surface interval time if making another dive.
• Follow desaturation and no-y guidelines.
• Review your dive using the log mode and prole mode.
• Download the dive log to your PC or MAC if you have the optional PC interface and software.
Care and Maintenance
Proper Handling Techniques
The NiTek Q is constructed to withstand the most demanding diving conditions. It is, however, a high-precision instrument, which requires proper care.
1. Always rinse the computer with freshwater after use.
2. Store your NiTek Q in a cool, dry location. After diving, wipe the computer dry and store it in a location separate
from other damp items.
3. Battery care and maintenance – see page 6.
Failure to follow these handling techniques may result in damage to the NiTek Q.
1. Do not store the computer in hot, humid, or wet environments. The pressure transducer is sensitive to both heat
and humidity. If impaired, it may cause incorrect altitude or depth readings.
2. When in hot and/or humid environments, dip the computer in water for several minutes to cool it to room tem perature before using it. If it is cold, allow the computer to warm to room temperature. Do not take it underwater
immediately after doing so.
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WARRANTY & ACCESSORIES
3. If the NiTek Q does not appear to be functioning properly, do not use it to dive. Return it to your authorized
Dive Rite dealer for repair.
4. The NiTek Q should not come in contact with solvents or any type of chemical substances.
5. Do not use compressed air to dry the NiTek Q.
6. Do not use the NiTek Q in hyperbaric chambers unless the device can be fully submerged in water inside the
chamber during recompression.
Warranty Information
Dive Rite will – at its sole discretion – repair or replace NiTek Q components proved to be damaged by faulty manufacture
or material, at no cost, for a period of up to one year from the date of purchase.
This warranty applies only to the original 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 specically excludes battery depletion or other conditions resulting from misuse, negligence, alteration,
accident or unauthorized repair.
To make a claim under the warranty, the owner must have registered his/her NiTek Q on our website at:
http://www.diverite.com/products/service/product registration/. All warranty repairs should be accompanied by a copy
of the purchase receipt. A Return Authorization (RA) can be obtained by calling Dive Rite at 800-495-1046 or e-mail at
Service@DiveRite.com.
Before shipping, ensure that the NiTek Q is adequately packaged and protected. Dive Rite is not responsible for any damage that may occur during shipping.
This warranty becomes void if NiTek Q components are damaged by anything other than normal recreational diving use,
or if they have been serviced or repaired by anyone other than authorized Dive Rite dealers.
Repairs made under the 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, express 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.
Accessories Available At Your Local Dive Rite Dealer
Learn more about all the accessories available for your new NiTek Q dive computer at www.diverite.com or visit your local
Dive Rite dealer.
Web Resource - To nd the nearest Dive Rite Dealer, go to http://www.diverite.com/dealers/
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Appendix A - TRIMIX UPGRADE
Normoxic or Hypoxic Trimix Upgrade Instructions
If you have upgraded to normoxic or hypoxic Trimix, you will be programming your computer for a percentage of helium
as well as oxygen. The SURFACE mode, DIVE mode, PLAN mode, and LOG mode screens reect the additional gas option
in your mix choices. You will need to become familiar with and learn how to manage the addition of helium to your
breathing gas throughout these menus. All other menus and screens are the same as the base model NiTek Q.
SURFACE Mode
The SURFACE mode is the NiTek Q’s default screen. At the surface, the computer automatically returns to this mode from any
other screen after 20 seconds, (slightly longer than 20 seconds
when in prole and compass modes). Upon surfacing from a
dive, the computer also returns to the SURFACE mode screen,
and displays additional post-dive information (see page 16).
The Surface mode displays battery charge status, date, time,
choice of FRESH or SEA calibration, and the gas mixes you will
use when diving, including both 02 and helium.
Menus
Dive Option SET and Display Mode
The dive option SET and display mode is where all “dive” settings are programmed including your P02 alarm for each gas,
%02, %HE, the maximum safe operating depth (MOD), an optional maximum depth alarm, a maximum dive time alarm,
conservatism/gradient factor options, a sampling rate for the log book, the FRESH or SEA water option, and screen brightness control. When the computer is in this mode, “SET” is displayed in the lower left hand corner of the screen.
SET Screen One is where you will program your mixes, including
the following options:
SURFACE Mode Screen
1. MIX Number – This is the mix number you are setting.
2. P02 Setting – This is the P02 setting for the mix number
selected. It can either be 1.4 or 1.6.
3. F02 – This is the oxygen percentage for the mix number
selected. The 02 range is 8%-99%.
4. % HE - This is the helium percentage for the mix number
selected. The %HE range for normoxic Trimix is 0-79%
and the %HE range for hypoxic Trimix is 0-92%.
Your maximum operating depth (MOD) is also displayed on SET Screen One. The MOD is the safe operating depth (maximum) for the mix selected and will automatically update to reect the chosen P02 limit (either 1.4 or 1.6).
To enter the Dive SET mode from the Surface screen:
1. Press the A button until “SET is displayed.
2. Press the B button to enter the dive set up option screen. MIX number 1 will be ashing.
Programming Gas Mixes
When you have entered the Dive SET mode and the MIX number is ashing:
1. Press the B button to change to the desired mix number that you want to set or change.
2. Press the A button to set the mix number. The computer will automatically advance to the P02 set/alarm option.
3. Press the B button to toggle between 1.4 and 1.6.
4. Press the A button to set the maximum P02 for this mix. The computer will automatically advance to the P02
set/alarm option.
SET Screen One
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Appendix A - TRIMIX UPGRADE
5. Press the B button to select your %02 for this mix.
6. Press the A button to lock in your %02 and the computer will automatically advance to your %HE.
7. Press the B button to select your %HE for this mix.
8. Press the A button to lock in your %HE and the computer will automatically advance SET screen two. To exit,
press and hold the A button for 2-3 seconds to return to the Surface mode.
NOTE: Up to three dierent gas mixes can be programmed for normoxic Trimix and seven dierent gas mixes can be
programmed for hypoxic Trimix, but if you are only using one mix, you only need to set MIX 1.
You should not rely on the NiTek Q as your sole means of tracking your exposure to elevated partial pressures of oxygen,
nitrogen, and helium. It is strongly recommended that you use either a second computer or dive tables when you dive.
PLAN Mode
PLAN mode is a dive-planning tool that enables you to determine how long you can stay at various depths while remaining within no-decompression limits (NDL). The no-decompression limits are based on the gas programmed for mix 1. If
you are making a dive within 24 hours of a previous dive, the
no-decompression limits are adjusted for residual nitrogen.
The two most important values that are displayed on the
screen in PLAN mode are the depth and no-decompression
time limit.
1. Depth - When you rst enter PLAN mode, the initial depth displayed is 30 feet (9 meters). You can advance the
depth in 10-foot (3-meter) increments. Fifteen dierent dive plan increments can be displayed to a maximum
depth of 170 feet (51 meters).
2. No-decompression limit (NDL) - The no decompression limit is dependent upon the depth displayed and the
current %02 (F02) setting. The NDL is displayed in minutes and is found in the upper right portion of the PLAN
mode screen.
If the NiTek Q calculates that there is residual nitrogen and helium present from previous dives, your no-decompression limits will be shorter. Depending on how much residual nitrogen is present, there may be no NDL time for some
deeper depths. If this takes place, the Q will display a series of horizontal dashes. Similarly, if a combination of depth
and F02 would cause a diver to exceed the selected P02 limit (either 1.4 or 1.6), a series of horizontal dashes appear in
the place of the no-decompression limit.
Using the PLAN Mode
1. Repeatedly press the A button until “PLAN” is displayed.
2. Press the B button to enter the PLAN mode screen.
3. Press the B button to advance the depth. The no-decompression time limits change automatically based on the depth.
4. When nished, press and hold the A button return to the SURFACE mode.
PLAN Mode Screen
Do not plan dives to depths deeper than those for which the NiTek Q is capable of displaying an available no-decompression limit. Doing so could cause you to exceed the no-decompression limits or a limiting P02 of 1.4 or 1.6 atmospheres.
This may increase your risk of decompression sickness or central nervous system (CNS) oxygen toxicity and can lead to
serious personal injury or death.
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Appendix A - TRIMIX UPGRADE
DIVE Mode
The DIVE computer mode is automatically entered when the computer enters the water. It begins performing its dive
calculations once you descend below 5 feet (1.5m). While in DIVE mode, the computer calculates and displays information about your dive and prompts you with safety stop information and warnings, if needed. When diving, there are two
screens you can toggle between, and you can switch to dierent gas mixes, when needed.
Primary Underwater Screen
The primary underwater screen in DIVE mode displays your
depth, remaining no-decompression time, dive time, max
depth, mix P02, 02 percentage, HE percentage, mix number,
and OLI (oxygen limit indicator) and PGT (pressure gas in
tissue) bar graphs, which are graphic representations of your
“CNS clock”.
1. Depth – This is your current depth.
2. Maximum Depth – This is the maximum depth you
have reached during your dive.
3. P02 – This is the partial pressure of 02 at your current
depth. It is based on the F02 settings for the mix
selected.
4. 02 (OLI) Bar Graph – This is the oxygen limit index (OLI) that calculates the cumulative eect of your exposure
to elevated partial pressures of oxygen (P02). This bar graph can display up to nine bars. If all bars are displayed,
it means that you have used 100 percent of your “CNS” clock triggering a visual warning. This graph increases
when you descend due to higher partial pressures and may decrease when you ascend.
OLI
Bar
Primary Underwater Screen
PGT
Bar
VISUAL WARNING
Oxygen Limit Index (OLI) Warning
The OLI warning accounts for the intensity and length of your exposure to partial pressures of oxygen. When 7 of the OLI
bars are displayed, the OLI graph ashes as a warning to ascend to a shallower depth. If you fail to heed this warning and
all 9 of the bars are displayed, the graph continues to ash until you ascend to a shallower depth and the graph drops to
seven bars.
5. Dive Time – This is the time spent (in minutes and seconds) underwater, measured from the time you descended
below 5 feet (1.5 meters).
6. Remaining No-Decompression Limit (NDL) – This is the time that is remaining (in minutes) before you reach the
no-decompression limit. This NDL time limit increases as you ascend and decreases as you descend.
7. Mix Number – This is the mix number for which the computer is currently calculating dive data.
8. 02 Percentage – This is the oxygen percentage programmed for the mix number that is displayed.
9. HE Percentage – This is the helium percentage programmed for the mix number that is displayed.
10. PGT Bar Graph – This is how much nitrogen the computer calculates your body has absorbed. There are a
maximum of 9 bars. If all 9 bars are displayed, it means that you are at or have exceeded the no-decompression
limit triggering a visual warning.
VISUAL INDICATOR
Pressure Gas in Tissue (PGT) Limit Indicator
The PGT limit indicator alerts you to the fact that you are approaching or have approached the no-decompression limit.
When 7 of the 9 bars are displayed, the PGT graph ashes to indicate that you must ascend to a shallower depth to avert a
decompression obligation. If all nine bars are displayed, the NiTek Q will change to the decompression mode.
VISUAL WARNING
The screen will ash if the mix you are diving is not suitable for breathing at your current depth.
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Appendix A - TRIMIX UPGRADE
LOG Mode
The NiTek Q stores information, such as depth, time, and gases, for every dive in a log. This stored information can be
viewed on screen in the LOG mode. The logbook holds a minimum of 15 hours, depending on settings. Each dive is assigned a log number and the date the dive is made, making it easy for you to toggle between the dive log pages.
1. Log Entry Number – This is the sequence in which
the log appears. The most recent log entry has the
lowest log number, beginning with Log 1. When the
computer’s memory is full, the oldest dives are
overwritten with the new dives. The causes the log
entry number assigned to an earlier dive to change.
2. Max Depth – This is the maximum depth reached
during the dive.
3. Date – This is the month and day of the dive.
4. Dive Time – This is the actual bottom time for he dive.
5. F02 Gas Percentage – This is the %02 that you entered
for the dive. All calculations were based on this per centage.
6. %HE – This is the %HE that you entered for the dive. All calculations were based on this percentage.
To View the Dive Log
LOG Mode Screen
1. Repeatedly press the A button until “LOG” is displayed.
2. Press the B button to enter the LOG mode screen.
3. Press the B button change to the log page displaying your most recent dive, -OR-Repeatedly press the B button
to scroll through the logged dives from the newest to the oldest. To rapidly scroll, press and hold the B button.
4. When nished, press and hold the A button return to the SURFACE mode.
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Appendix B - CCR UPGRADE
CCR Upgrade Instructions
If you have upgraded to CCR for your NiTek Q, your computer can now be used with closed circuit rebreathers using a
constant–P02 setpoint ranging from 0.4 to 1.6. The CCR upgrade allows you to program the NiTek Q with the set point
you have programmed into your rebreather. As long as you run the rebreather at the setpoint you programmed into the
Q, it will provide accurate dive and decompression information. You can change setpoints on the y in DIVE mode to account for any shifts you may make on the rebreather.
You will need to program the NiTek Q with your rebreather diluent gas and all bailout gases for each dive. The setpoint
is programmed separately and is used to calculate your decompression. If you have to switch from closed circuit (C/C) to
open circuit (O/C) mode during a dive, you will be able to change to your pre-programmed bailout gases to complete
any decompression.
NOTE: You must unlock the Trimix upgrade to upgrade to CCR.
The SURFACE mode, SET mode, and DIVE mode screens reect the closed circuit upgrade. You will need to become familiar with and learn how to use these menus. All other menus and screens are the same as the basic NiTek Q.
SURFACE Mode
The SURFACE mode is the NiTek Q’s default screen. At the
surface, the computer automatically returns to this mode from
any other screen after 20 seconds, (slightly longer than 20
seconds when in prole and compass modes). Upon surfacing from a dive, the computer also returns to the SURFACE
mode screen, and displays additional post-dive information
(see page 16).
The Surface mode displays battery charge status, date, time,
choice of FRESH or SEA calibration, either “O/C” or “C/C”, and
the gas mixes you will use when diving.
To switch between O/C and C/C, simultaneously hold buttons A and B for 2-3 seconds.
Be sure you are in the appropriate O/C or C/C mode when programming your NiTek Q for dives with a rebreather.
Dive Option SET and Display Mode
The dive option SET and display mode is where all “dive” settings are programmed including your P02 alarm or setpoint
(SP) for each gas, %02, the maximum safe operating depth
(MOD), an optional maximum depth alarm, a maximum dive
time alarm, conservatism/gradient factor options, a sampling
rate for the log book, the FRESH or SEA water option, and
screen brightness control. When the computer is in this mode,
“SET” is displayed in the lower left hand corner of the screen.
SET Screen One is where you will program your mixes, including the following options:
1. MIX Number – This is the mix number you are setting.
2. P02 or SP Setting – This is the P02 setting for the mix number selected on O/C mode, or setpoint (SP) setting in
C/C mode. The P02 can be set for either be 1.4 or 1.6 in O/C mode, and the SP for 0.4 to 1.6 in C/C mode.
3. F02 – This is the oxygen percentage for the mix number selected. The 02 range is 8%-99%.
4. % HE - This is the helium percentage for the mix number selected. The %HE range is 0%-92%.
SURFACE Mode Screen
SET Screen One
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Appendix B - CCR UPGRADE
Your maximum operating depth (MOD) is also displayed on SET Screen One. The MOD is the safe operating depth
(maximum) for the mix selected and will automatically update to reect the chosen P02 limit (either 1.4 or 1.6)
To Set P02 Setpoints
NOTE: If you only plan on using one P02 setpoint and mixture on your dive, you only need to set that P02 and mix.
From the SURFACE mode screen, repeatedly press the A button to reach the SET screen.
1. If you are not already in closed circuit (C/C) mode, put the Q into C/C mode.
2. Press and hold the A button for 3-4 seconds until “SP” is ashing. Press the A button to enter the setpoint selec tion mode. The setpoint P02 is ashing.
3. Press the B button to change the P02 to the desired value that you want to set or change.
4. Press the A button to select the mix setting.
5. Press the B button to set the mix number.
6. Press the A button to lock in your mix and the computer will automatically advance to the %02 option. To exit,
press and hold the A button for 2-3 seconds to return to the Surface mode.
NOTE: Up to seven dierent gas mixes can be programmed, but if you are only using one mix, you only need to set MIX 1.
The NiTek Q should serve as a back up device to your closed circuit rebreather electronics and never be the primary
means for tracking exposure to elevated partial pressures of oxygen.
To Change Setpoints Underwater
1. Press and hold the A button for 2-3 seconds and the “SP” number ashes.
2. Press the B button to scroll through the setpoint numbers. The setpoint value changes to reect the PO2 for the
selected mix,. .
3. Press the A button to lock in a setpoint and return to the primary diving mode screen.
NOTE: You cannot lock in a setpoint if it causes you to exceed a PO2 of 1.6 atmospheres.
Only switch setpoints when you have reached a safe operating depth for the P02 you are switching to.
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Appendix C - CUSTOM GF UPGRADE
Custom Gradient Factor (GF) Upgrade Instructions
Your custom gradient factor upgrade allows you to set your own gradient factors. The NiTek Q automatically defaults to
the most conservative gradient factor setting. Creating and using custom gradient factors should only be undertaken by
those who understand the consequences of these settings. Aggressive settings should not be undertaken lightly. It is
not recommended diving any computer to the maximum limits.
Web Resource - See Matti Anttila’s article, “Gradient Factors” to learn more about customizing your gradient factor.
http://www.diverite.com/downloads/
To Set Custom Gradient Factors (GF)
From the SURFACE mode screen repeatedly press the A button
until the rst SET screen is reached.
1. Press the B button to enter the rst SET screen.
2. Repeatedly press the A button until you reach the SET
screen three and the CONS0, CONS1, or CONS2 is ashing.
3. Press the B button to toggle to CONS GF and the rst
number will be ashing.
4. Press the B button to change the rst number.
5. Press the A button to set the rst number and automati
ally advance to the second number.
6. Press the B button to change the second number.
7. Press the A button to lock in the second number and advance to your Imperial or Metric preference. To exit, wait
2-3 seconds and the computer will automatically return to the SURFACE mode.
SET Screen Three
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Appendix D - COMPASS UPGRADE
COMPASS Upgrade Instructions
Now that you have added a digital compass to your computer, it must calibrated before use. When the DIVE mode is
activated when you enter the water, the compass is displayed on the second underwater screen.
COMPASS Mode Screen
To Calibrate Your Digital Compass
From the SURFACE mode screen repeatedly press the A button to scroll to the COMPASS screen.
1. Press and hold the B button while holding the computer in a horizontal position. Holding the unit at, smoothly
rotate the computer twice in a 20-second period. Following this exercise, a “Calibration Complete” message will
be displayed.
Web Resource - Go to Dive Rite TV for a step-by-step video showing compass calibration:
http://www.diverite.com/tv/gear/
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Copyright © 2011 Lamartek, Inc. dba Dive Rite
This manual is copyrighted by Lamartek, Inc. dba Dive Rite.
You may not reproduce, translate, transcribe, or
transmit any part of this manual without express,
written permission from Lamartek, Inc. dba Dive Rite.
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