Nemesis Nitrox - Cochran Undersea Technology

Nemesis Nitrox - Cochran Undersea Technology
Limited Two-Year Warranty
To the original owner only, Cochran Undersea Technology, a division of Cochran Consulting, Inc.,
guarantees this dive computer to be free of defects in both materials and craftsmanship under
normal SCUBA use for two years from the date of purchase. Failing to provide proper care, which
includes having an Annual Maintenance performed, will cause this warranty to be null and void.
Any defect not excluded in the limitations section below will be repaired, replaced, or replaced with
a refurbished unit, at Cochran Undersea Technology’s discretion, free of charge. Purchaser is
responsible for shipping the product to the Cochran Undersea Technology Service Department
and for all associated freight and insurance costs. This warranty IS NOT transferable. All correspondence concerning this warranty MUST be accompanied by a photocopy of the original sales
receipt and proof of an Annual Maintenance, if applicable.
Your warranty registration card must be returned to Cochran Undersea Technology within 15 days
of the purchase date. Failing to do so will cause this warranty to be null and void. The purchase
date recorded on your warranty registration form and the date on the original sales receipt must
also match. Charges for the Annual Maintenance are not covered under this warranty. The
Annual Maintenance includes accuracy verification of the depth and pressure sensors, overall
calibration and overall performance. You may return your dive computer to the place of purchase, or you may ship your unit directly to the Cochran Undersea Technology Warranty Center.
LIMITATIONS
This warranty DOES NOT cover any damages including, but not limited to, those resulting from
abuse, tampering, battery leakage, accident, or lack of proper care. Proper care includes having
an Annual Maintenance performed. Additionally, any modifications or repairs to this unit performed
by anyone other than an authorized Cochran Undersea Technology dealer will void this warranty.
All plastics, o-rings, batteries, or damage due to accident, abuse, modification, or tampering are
NOT covered.
STATEMENT OF LIABILITY
A mathematical model is used by this dive computer to calculate nitrogen absorption into the body
as well as nitrogen elimination during a surface interval between dives. While great care and
extensive research has gone into the making of this model, variables such as, but not limited to,
dehydration, being overweight, age and old injuries may require a more conservative use of this
instrument. COCHRAN UNDERSEA TECHNOLOGY DOES NOT GUARANTEE THE PREVENTION OF DECOMPRESSION SICKNESS OR ANY OTHER INJURY THAT MAY REQUIRE TREATMENT IN A RECOMPRESSION CHAMBER. This dive computer should be used solely as a guide,
providing the trained and certified diver the information needed to make safe diving decisions. It is
expressly understood that by buying and/or using this dive computer, the diver assumes ALL risk
as to its quality, performance, and accuracy. Cochran Undersea Technology, its distributors, or
retailers will not be held liable for any personal injuries or other damages resulting from its operation, even if Cochran Undersea Technology has been advised of such occurrences and damages.
Cochran Undersea Technology supports and strongly agrees with maximum depth limits of 130
feet for recreational SCUBA diving, as set by recognized certification agencies. Cochran Undersea
Technology in no way encourages diving deeper than this limit. You should always adhere to safe
diving practices which include, but are not limited to, always using the buddy system, diving within
your own limitations, having your tanks filled only by a certified NITROX blending station, and
making only dives that do not require decompression.
1
FCC Label
FCC ID: LYP744556-01
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
Interference Statement
NOTE: This equipment has been tested and found to comply with both the limits for a
Class B digital device and an intentional radiator, pursuant to Part 15, Subpart B/C of
the FCC Rules. This equipment generates, uses, and radiates radio frequency energy.
If not installed and used in accordance with the instructions, it may cause interference to
radio communications.
The limits are designed to provide reasonable protection against such interference in a
residential situation. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause interference to radio or television
reception, which can be determined by turning the equipment on and off, the user is
encouraged to try to correct the interference by one or more of the following measures:
·
Reorient or relocate the receiving antenna of the affected radio or television.
·
Increase the separation between the equipment and the affected receiver.
·
Connect the equipment and the affected receiver to power outlets on separate
circuits.
·
Consult the dealer or an experienced radio/TV technician for help.
MODIFICATIONS
Changes or modifications not expressly approved by Cochran Consulting, Inc. could
void the user’s authority to operate the equipment.
SHIELDED CABLES
This product is designed to be used only with the DCI interface cable (RS-232) to maintain compliance with FCC Regulations.
2
Patent Information
Protected under one or more of the following patents:
US
AUS
EUR
4949072, 4999606
591804
0305450
Other patents pending. All specifications subject to change without prior notice. Nemesis is a trademark of Cochran Consulting, Inc. Copyright 1995 Cochran Consulting,
Inc.
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TABLE OF CONTENTS
Limited Two-Year Warranty ................................................... 1
FCC Label ................................................................................ 2
Patent Information ................................................................... 3
Table of Contents .................................................................... 4
How This Manual Is Organized .............................................. 8
Installation ................................................................................ 9
Activation ................................................................................. 9
SECTION I. The NEMESIS™ II NITROX: OVERVIEW ......... 10
Nitrox-specific Functions
Altitude Adaptation......................................................................10
Intelligent Deep Dive Compensation ............................... 10
Salt Water/Fresh Water Compensation ........................... 10
Temperature, Workload, Ascent Rate Compensation .... 10
Dual Blend Capability ....................................................... 10
Equivalant Air Depth .......................................................... 11
CNS and OTU Oxygen Toxicity ........................................ 11
Operating Modes
Self-Diagnostic Mode ....................................................... 13
Surface Mode .................................................................... 13
Predive Prediction Mode .................................................. 13
CNS/OTU Toxicity Percentage Display ....................... 13
O2 Mix Display .............................................................. 13
Battery/Altitude Display ............................................... 13
Logbook Mode .................................................................. 14
Subsurface Mode .............................................................. 14
Emergency Decompression Mode .................................. 14
Gauge Mode ...................................................................... 15
SECTION II. DISPLAYS ......................................................... 16
Explanation of Page Layouts ............................................... 17
Self-Diagnostic Mode ....................................................... 17
Surface-Mode .................................................................... 18
Main Display.................................................................. 18
Alternate Display .......................................................... 19
Predive Prediction Mode .................................................. 20
Beginning NDC Limits ................................................. 21
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CNS/OTU Toxicity Display ........................................... 21
O2 Mix Display .............................................................. 22
Battery/Altitude Display ............................................... 23
Subsurface-Mode ............................................................. 24
Main Display.................................................................. 24
Alternate Display .......................................................... 25
Emergency Decompression Mode .................................. 26
Main Display.................................................................. 26
Alternate Display .......................................................... 27
Gauge Mode ...................................................................... 28
Conditions That Will Cause Gauge Mode ................... 29
Logbook Mode .................................................................. 30
Main Display.................................................................. 30
Alternate Display .......................................................... 31
SECTION III. EXPLANATIONS .............................................. 33
Description of Functions ..................................................... 35
Altitude Diving ................................................................... 35
Ascent Rate ....................................................................... 35
Ascent Rate Bar Graph..............................................................36
BATT ................................................................................... 36
BOTTOM ............................................................................ 36
BP ....................................................................................... 37
CEILing .............................................................................. 37
DEPTH ............................................................................... 38
DIVE ................................................................................... 38
MAX DEPTH ...................................................................... 38
Metric ................................................................................. 39
REMAINing TIME AIR ........................................................ 39
REMAINing TIME NDC ...................................................... 39
REMAINing TIME DEC ...................................................... 40
SURFace Time .................................................................. 40
TANK .................................................................................. 40
TEMP .................................................................................. 40
Time-To-FLY ...................................................................... 41
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AUDIBLE & VISUAL WARNINGS .......................................... 41
User Defined Maximum Depth ......................................... 41
1/2 Tank Pressure Alarm................................................... 41
Low On Air ......................................................................... 42
Ceiling Violation ................................................................ 42
Breathing Parameter Alarm .............................................. 42
Ascent Rate Alarm ............................................................ 42
Low Battery Voltage ......................................................... 43
Gauge Mode Alarm ........................................................... 43
Two-Minute Warning ......................................................... 43
60 Foot Decompression Stop Warning ........................... 43
Entering Emergency Decompression Mode................... 43
Oxygen Toxicity Unit (OTU) Warning: ........................... 44
SECTION IV. CARE AND MAINTENANCE ........................... 47
Normal Care and Maintenance ........................................ 49
Rinsing and Cleaning ....................................................... 49
High-pressure Transducer Care ...................................... 49
Battery Life and Replacement.......................................... 49
Battery Care ...................................................................... 50
Annual Maintenance ......................................................... 51
SECTION V. TECHNICAL SPECIFICATIONS ...................... 53
Replacement Parts ........................................................ 56
SECTION VI. ACCESSORIES ............................................... 57
Dial-A-Mix ............................................................................... 59
Limited 90-DAY Warranty .................................................. 59
Overview ............................................................................ 60
Installation ......................................................................... 60
Using the Dial-A-Mix ......................................................... 61
DCI .......................................................................................... 65
Features of the DCI Software Package ........................... 65
Minimum Hardware Configuration .................................. 65
Iinstallation of the DCI Software to the PC ..................... 66
Quick Start ......................................................................... 66
Detailed Software Installation .......................................... 66
Installation of the Data Probe to the PC .......................... 67
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Attaching Data Probe to the Dive Computer................... 68
Keyboard Keys and their Usage...................................... 69
Uploading Dive Data ......................................................... 70
Files .................................................................................... 70
Statistics ............................................................................ 71
Profiles ............................................................................... 74
Logbook ............................................................................ 79
Configuration .................................................................... 80
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How This Manual Is Organized
Your NEMESIS™ II NITROX Dive Computer from Cochran Undersea Technology is
one of the most advanced instruments made for this application. It incorporates more
user-programmable functions than any other dive computer made. Once your personal
preferences and maybe some dive site or condition-specific settings are entered, its
computing power goes to work in the background. What you, the diver, see is all the
critical information you need, in an informative and easy to comprehend display, with
minimal distraction.
It is in that same light that we have designed this Manual to be as easy to use as
possible, yet as comprehensive as it needs to be. The basic operating information is
presented first, followed by more technical and detailed sections for reference. Following are the sections you will find as you get acquainted with your NEMESIS™ II NITROX. We hope you find this format helpful, informative, and readily absorbed.
I.
OVERVIEW. This section provides a brief look at several of the key functions
and features of the NEMESIS™ II NITROX, then makes reference to appropriate items in SECTION III for more detailed explanations.
II.
DISPLAYS. This section illustrates a typical display in each of the various
operating modes of your dive computer, explains what is being shown, then
makes reference to appropriate items in SECTION III for more detailed explanations.
III.
EXPLANATIONS. This section goes into much more detail on each function,
how it relates to other information, and, where appropriate, what choices are
available with regard to user programmable functions.
WARNINGS. A number of audible and visual warnings are generated by your
NEMESIS™ II NITROX when circumstances warrant. Many of these may be
set by the user; this section explains their meanings and user choices.
QUESTIONS AND ANSWERS. We answer the most frequently asked questions about the NEMESIS™ II NITROX and its operation.
IV.
CARE AND MAINTENANCE. This section details the basic maintenance and
care necessary to assure optimum useful life from this device. This section
also explains how to arrange for the factory-performed Annual Maintenance
and Re-calibration.
V.
TECHNICAL SPECIFICATIONS: This section lists the technical specifications for your NEMESIS™ II NITROX.
VI.
ACCESSORIES. This section contains the operational manual for the optional Dial-A-Mix field programming unit as well as the Personal Computer
Dive Computer Interface (DCI) program.
8
Installation
The Tank Unit (TU) high-pressure sensor installs into a high-pressure port of your firststage regulator. This should be done by your Authorized Dealer at the time of purchase.
An adapter (included with your unit) may be necessary depending on your regulator
type and high-pressure port location since these differ by manufacturer. Should you
choose to install the TU yourself, remove your current high-pressure hose or the highpressure plug from your first stage regulator. Lightly lubricate the sensor o-ring only with
a lubricant approved for use with Enriched Air Nitrox equipment. YOU SHOULD NOT
USE SILICONE GREASE. Screw the sensor into the first-stage high-pressure port.
Then, use an 11/16" open-end wrench to make certain the connection is “snug”, but not
overtightened.
CAUTION: DO NOT use your hand to tighten the high-pressure connection. This
procedure should only be accomplished by using an open-end wrench placed
over the metal nut of the high-pressure connection. It must not be overtightened.
With the first stage properly attached to a filled SCUBA tank, turn the tank on slowly.
Once the tank valve has been opened, listen to the TU’s connection for any escaping
air. If possible, completely immerse the tank and regulator in water to see if bubbles
form around your connection. If any air leak is seen or heard, turn the air off by closing
the tank valve and take the entire regulator system to the place where your purchased
your NEMESIS™ II NITROX.
The Tank Unit (TU) clips to a low-pressure hose close to the first-stage. The Wrist Unit
(WU) may be worn on the wrist or attached to your Buoyancy Control Device.
Activation
The TU will automatically activate when it senses a tank pressure greater than 200 psi
or may be manually activated by tapping on the TU case in the circle area that says
"PWR". The TU comes from the factory set so that the unit may be awakened in either
way.
The WU is activated by rotating the wrist quickly or tapping on the face of the unit for
approximately five seconds.
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The NEMESIS™ II NITROX: Overview
In addition to the standard time/depth-based no-decompression (NDC) limit calculations, the NEMESIS™ II NITROX can, at the diver's choosing, also incorporate several
other nitrogen absorption influencing variables. You now have a computer which
recognizes environmental and diver activity factors and can adjust the algorithm accordingly, overcoming limitations inherent to a fixed nitrogen loading algorithm. Also,
considerations which are specific to use of Nitrox breathing mixture are recognized.
And finally, the manner in which certain items of information are displayed can be set
to the diver's preference. All of these are accessible via the DCI Personal Computer
Interface, and may be adjusted on a per-dive or a "set and forget" basis. Here is a brief
look at some of the key items:
Altitude Adaptation
As the diver's (and the dive computer's) altitude changes during travel between destinations, the NEMESIS™ II NITROX remains "aware" of the changes and incorporates
them into its processing. Appropriate adjustments are then made to no-decompression and /or Emergency Decompression calculations.
Intelligent Deep-dive Compensation
Rather than setting pre-determined repetitive deep-dive compensation depths, your
NEMESIS™ II NITROX will base this compensation on the remaining residual nitrogen values in all twelve half-time compartments.
Sea Water/ Fresh Water Recognition
Indicated depth is influenced by a factor of approximately three percent due to the
different densities of sea water and fresh water. Unlike some systems which make
assumptions based on altitude, etc., the NEMESIS™ II NITROX can determine which
type of water it is in and adjusts accordingly. This greatly increases the accuracy of the
data conveyed to the diver.
Temperature, Workload, and Ascent Rate Compensation
Each of these factors is known to have a direct bearing on the nitrogen loading rate.
Since much of the effect is cumulative, the NEMESIS™ II NITROX tracks each factor
separately and adjusts its calculations accordingly for the duration of the "dive day".
The diver may opt to have each factor included in or excluded from nitrogen calculations via the optional DCI interface. See more detailed explanations on each of these
items listed separately in SECTION III. Also review the explanation of BP (Breathing
Parameter), which is directly related to Workload Compensation.
Enriched Air Nitrox, Dual Blend Capability
Diving with Enriched Air Nitrox requires additional calculations to reflect the changed
no-decompression limits and to help the diver avoid oxygen toxicity. Also, since many
divers use two different nitrogen/oxygen mixtures, the NEMESIS™ II NITROX has the
ability to recognize when a switch is made from one mixture to the other and incorporate this critical information into its calculations. Mix 1 (usually considered the "bottom
mix") can range from 21- to 50-percent oxygen. Mix 2 (usually the "decompression
mix") can range from 21- to 99.9-percent oxygen. Both mixes are preprogrammed via
either of two optional devices, the DCI Personal Computer Interface or the Dial-A-Mix
Field Programmer.
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Equivalent Air Depth
Your dive computer uses Equivalent Air Depth (EAD) in determining the no-decompression limits for each individual dive. A standard NOAA equation is used to determine the EAD based upon the oxygen percentage entered. This equation is:
EAD =
Where
(1 - O2%) ´ (D + 33)
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ - 33
.79
O2 is entered in decimal form and D is the actual depth in feet.
For example, if you were diving with NOAA II (36% oxygen) to 70 feet, the EAD used for
determining your no-decompression limit would be:
EAD =
(1-.36) ´ (70+33)
¾ ¾ ¾ ¾ ¾ ¾ ¾ ¾ - 33
.79
.64 ´ 103
¾ ¾ ¾ ¾ - 33
.79
= 50.44 feet
Therefore, the no-decompression time for this example would be calculated to an
EAD of 50.44 feet.
This dive computer provides even greater flexibility by allowing the diver to select and
enter oxygen percentages from 21.0 to 50.0 percent for Mix 1 and from 21.0 to 99.9
percent for Mix 2 in 0.1 percent increments.
Central Nervous System (CNS) Oxygen Toxicity
An additional consideration for the NITROX diver is Oxygen Toxicity. Your dive computer will provide audible and visual warnings to alert you to this hazardous condition.
Maximum exposure time for a given depth is calculated based on the Partial Pressure
of oxygen (PO2). The following standard formula is used to determine the PO2:
D X O2% = PO2 level
Where O2 is entered in decimal form and D is the actual depth in atmospheres
absolute.
For example, if you were diving to 86 feet with NOAA II your PO2 level would be:
3.6 ( or 86 ¸ 33 + 1) ´ .36 = 1.296
which would be rounded up to PO2 = 1.3. PO2 levels from 0.5 to 1.6 are calculated.
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Exceeding this maximum limit will greatly increase your chances of immediate onset
of CNS Oxygen Toxicity. While various training organizations have established maximum PO2 limits, the maximum time limits and their associated PO2 levels used in this
dive computer's calculations are shown on the following table:
PO2 LEVEL
.5
.6
.7
.8
.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
Max Bottom Time (minutes)
1304
719
496
379
306
257
221
194
172
149
110
44
Your dive computer calculates CNS or OTU toxicity percentages and it issues a unique,
onetime audible alarm should you reach 75 percent of the associated maximum limit.
In addition to this audible warning, the WARNING legend will appear and flash AND
the TEMPerature digits will be replaced with the current calculated CNS Oxygen Toxicity percentage. This warning will continue until the calculated toxicity percentage is
less than 75 percent.
NOTE: While all other audible alarms of the dive computer consist of five long
beeps, the toxicity audible alarm consists of short double-beeps that sound for five
seconds.
WARNING: It is possible in certain diving circumstances to reach an Oxygen Toxicity limit well before reaching a no-decompression limit. For this reason, NITROX
diving should only be conducted by a diver who has successfully completed a
sanctioned NITROX diving course from a recognized certifying agency.
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OPERATING MODES
Self-Diagnostic Mode
At turn-on, both the TU and WU complete self-diagnostic tests before displaying current information. During these tests, all of the legends and digits on the WU illuminate
for five seconds. Upon completion, your computer enters the Surface Mode.
Surface Mode
At the completion of the Self-Diagnostic Mode, the NEMESIS™ II NITROX enters the
Surface Mode. The Main Display shows: DIVE number, time-to-FLY, TEMPerature,
SURFace time, TANK pressure, and MAXimum DEPTH (of the last dive) The Alternate
Display shows the last dives BOTTOM time, and breathing parameter (BP).
Predive Prediction Mode
After one minute of Surface-Mode, the NEMESIS™ II NITROX will begin its Predive
Prediction Mode scrolling, Predictions begin with 30 feet and continues in 10 foot
increments to 160 feet or to the limit pre-set by the diver via the optional DCI PC
interface. NDC limits of less than two minutes will not be displayed. The WU will
show the DEPTH, TANK pressure, and the lesser of the NDC (no-decompression
time) or AIRtime remaining for that depth.
NOTE: Should your NEMESIS™ II NITROX detect a tank pressure less than 500 psi,
predive predictions will display no-decompression times only.
CNS/OTU Toxicity Percentage Display
At the conclusion of the Predive Prediction Mode, your computer will display the current
CNS and OTU Toxicity percentages. The CNS percentage is displayed under the TANK
legend and the OTU percentage is displayed under the DEPTH legend.
O2 Mix Display
Following the CNS/OTU Toxicity Percentage Display, the current oxygen percentages
for Mix 1 and Mix 2 are displayed as a factor of 10. For example, an oxygen percentage
of 35.5 would be displayed as 355.
Mix 1 will be displayed under the TANK legend and Mix 2 will be displayed under the
DEPTH legend.
NOTE: Oxygen percentages are entered in 1/10 of a percent increments.
Battery/Altitude Display
The two digits under the DEPTH legend indicate the current TU battery voltage as a
factor of 10. For example if the TU's battery voltage is 5.8 volts, the two digits under the
DEPTH legend would display 58.
The numbers under the TANK legend display altitude in 1000 foot increments. For
example, if under the TANK legend you see 4, the altitude calculated would be 4000 feet
above sea level (4 X 1000 = 4000).
At the conclusion of this display, your computer will re-enter the Surface Mode.
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WARNING: While your NEMESIS™ II NITROX will automatically adjust its no-decompression algorithm for altitude, you should NOT attempt to dive at altitudes greater
than 1,000 feet above sea level without first completing a sanctioned altitude diving
course from a recognized training agency for recreational diving. A NEMESIS™ II
NITROX should not be used by anyone without this important training.
Logbook Mode
While your NEMESIS™ II NITROX is in its normal Surface Mode, you can access the
Logbook Mode. To do this, tap the crosshatched area on the TU. This will cause the
display to change on the WU to the Logbook Mode.
A feature of your NEMESIS™ II NITROX is its ability to provide diving data to you in this
mode for your previous 300 dives beginning with your most recent dive. To move to the
next prior dive, tap the crosshatched area of the TU again. Wait for the new data to be
displayed on the WU before tapping again to go to the next prior dive. Access the WU's
Alternate Display by rotating the WU until the display appears. It will appear for three
seconds before returning to the Logbook Mode's Main Display. Your NEMESIS™ II
NITROX will return to the Surface Mode thirty seconds after the final selected log has
been displayed.
The information contained on the Logbook Mode's Main Display include: DIVE number,
time-to-FLY, ASCENT rate, TEMPerature, BOTTOM time, TANK pressure, and MAXimum
DEPTH. The Alternate Display shows: REMAINing time, CEILING, BP, and DEPTH.
Subsurface Mode
Upon descending below five feet, your NEMESIS™ II NITROX enters and remains in
the Subsurface Mode until you:
ascend to a depth less than three feet -ORenter Emergency Decompression Mode -ORenter Gauge Mode
The Subsurface Mode has a Main and Alternate display. The Main Display shows: the
REMAINing TIME for either AIR or NDC, whichever is less; CEILING, BOTTOM time for
this dive, current TANK pressure, current DEPTH, and ASCENT rate.
The Alternate Display shows:REMAINing TIME for either AIR or NDC, whichever is
greater; TEMPerature, BP, and MAXimum DEPTH of this dive. The Alternate Display
remains for three seconds.
Emergency Decompression Mode
WARNING: Your NEMESIS™ II NITROX should not be used for deliberate decompression diving, but merely as an aid to assist you during ascent should you
mistakenly overstay your no-decompression limit. Cochran Undersea Technology in no way encourages deliberate decompression diving.
Should you exceed your NDC time limit, your NEMESIS™ II NITROX will enter its Emergency Decompression Mode. Five audible warning chirps will sound and the DEC legend will appear on your WU. Should you require a 70 foot or greater decompression
stop your unit will issue five additional warning chirps.
WARNING: You should IMMEDIATELY begin your ascent to the proper CEILing depth
upon hearing these warnings.
14
Your NEMESIS™ II NITROX is configured at the factory to alternate between total
decompression time and time at current stop. Via the optional DCI, stop time can also
be configured to display:
1. Total decompression time only -OR2. Time at current stop only .
CEILING is the depth to which you must ascend, BUT NOT EXCEED, for your first
emergency decompression stop. Ceiling depths of: 10, 20, 30, 40, 50, or 60 feet are
displayed. A stop greater than 60 feet is indicated by showing a CEILing depth of 60,
but with the digits under the DEPTH legend flashing.
NOTE: When completing your decompression stops, minor changes in your depth
may occur due to swells at the surface. For this reason, you should make your
stop slightly deeper than the CEILing depth. Your NEMESIS™ II NITROX will continue to give decompression credit when this precaution is taken.
Time spent above a CEILing depth will not be credited to the required decompression
obligation. Instead, a 1.5 second penalty will be added to that time for each one second
spent above the CEILing.
CAUTION: Ascending above the CEILing depth will cause your NEMESIS™ II
NITROX to issue an audible chirp. The current depth digits and the WARNING
legend will flash. Both the audible alarm and the flashing display will continue
until you descend below the CEILing depth.
Your BOTTOM time, TANK pressure, ASCENT rate, and DEPTH gauge will continue to
operate normally as if you were in the Subsurface Mode.
Gauge Mode
Violating certain conditions will cause your dive computer to cease providing remaining
time information, and stop calculating nitrogen absorption/elimination. When this occurs, your unit has entered its Gauge Mode. Once in this mode, 24 hours of surface
time MUST elapse before the system will resume its normal operation.
Any one of the following conditions will cause your dive computer to immediately enter
Gauge Mode:
·
More than five minutes has elapsed with the depth less than the CEILing.
·
A CEILing 100 feet or greater is calculated
·
The maximum functional operating depth of 327 feet is exceeded.
15
SECTION I DISPLAYS
16
Explanation of Page Layouts
The following pages provide a "snapshot" of the screen displays for each of the
computers various functional modes, showing:
1. An illustration of the WU display
2. The LEGEND displayed
3. The MEANING of that legend
4. The VALUE depicted under that legend
5. The PAGE where you may find more information on that particular function.
Any WARNINGS or NOTES about that mode, they will be displayed on this page also.
Self-Diagnostic Mode
FIG-1
17
Main Display
Upon activation, the TU and WU enter their respective diagnostic modes. In this
mode, all segments on the WU are illuminated so the diver can verify the display (See
FIG-1). The TU will issue 5 beeps if it has successfully completed its diagnostic self
-test.
NOTE: If the computer is in its Altitude Acclimatization Mode, the TU will issue 4
beeps instead of
Surface-Mode
The Surface Mode has two displays, a Main Display and an Alternate Display. You may
switch to the Alternate Display by rotating the wrist quickly or tapping firmly on the face
of the unit for approximately 5 seconds.
FIG-2
Main Display
Approximately 10 seconds after powering up, your dive computer enters the Surface
Mode.
LEGEND
DIVE
MEANING
dive of the day
FLY
time-to-fly
15 hours
40
TEMP
present air temperature
73 deg. F
40
SURF
present surface time
0:20 minutes
40
TANK
current tank pressure
3024 psi
40
MAX DEPTH
maximum depth of previous dive
118 feet
38
18
VALUE SHOWN
2
PAGE
38
FIG-3
Alternate Display
LEGEND
BOTTOM
MEANING
bottom time of last dive
VALUE SHOWN
PAGE
1:26 (1hour 26 minutes) 36
BP
breathing parameter of last dive
33
37
19
Predive Prediction Mode
FIG-4
Main Display
After one minute of Surface Mode, the dive computer will automatically enter the Predive
Prediction Mode. During this mode, predictions of no-decompression limits (NDC) or air
time remaining (whichever is the lesser) will be made in ten foot increments beginning at
30 feet and ending at either 160 feet (normal), or the depth specified by the user utilizing
the optional DCI Personal Computer Interface.
LEGEND
REMAIN TIME NDC
MEANING
remaining NDC time
VALUE SHOWN
2:17 (2 hrs 17 mins.)
PAGE
39
TANK
tank pressure
2176 psi
40
DEPTH
predicted depth
40 feet
38
NOTE: If the tank pressure is less than 500 psi, all predictions will reflect
NDC time only.
The following chart displays the beginning, sea-level no-decompression times
for the depths from 30 to 160 feet for the U.S. Navy, DSAT, and the NEMESIS™ II.
20
Beginning NDC Limits
DEPTH
30 FEET
40 FEET
50 FEET
60 FEET
70 FEET
80 FEET
90 FEET
100 FEET
110 FEET
120 FEET
130 FEET
140 FEET
150 FEET
160 FEET
BEGINNING NO-DECOMPRESSION LIMITS (IN MINUTES)
U.S. NAVY
DSAT NEMESIS™ II NITROX
———
———
262
200
140
137
100
80
78
60
55
56
50
40
39
40
30
30
30
25
23
25
20
18
20
16
13
15
13
11
10
10
9
10
8
8
5
——
7
5
——
6
CNS/OTU Toxicity Display
At the conclusion of the Predive Prediction Mode, your dive computer will display the
current Central Nervous System (CNS) Toxicity and Oxygen Tolerance Unit (OTU) Toxicity levels. The CNS and OTU levels will be displayed in percent. This screen will be
displayed for three seconds.
FIG-5
Main Display
LEGEND
REMAIN TIME NDC
MEANING
VALUE SHOWN
used to identity the
2:00
CNS/OTU Toxicity Display
PAGE
39
TANK
indicates the CNS
Toxicity percentage.
27%
40
DEPTH
indicates the OTU
Toxicity level percentage.
8%
38
21
O2 Mix Display
Following the CNS display, the O2 MIX Display will be shown for three seconds.
FIG-6
Main Display
LEGEND
REMAIN TIME NDC
MEANING
used to identity the
O2 Mix Display
VALUE SHOWN
1:00
PAGE
39
TANK
indicates the Mix 1 O2
percentage times 10.
21.5%
40
DEPTH
Indicates the Mix 2 O2
percentage times 10.
62.5%
38
Your dive computer has the ability to enter O2 percentages in 1/10 of a percent increments via the optional Dial-A-Mix, or the DCI Personal Computer Interface. The WU
displays these values as whole numbers. Therefore 28.7% O2 would be displayed as
287 on the WU.
22
Battery/Altitude Display
At the conclusion of the O2 Mix Display, your dive computer will display the TU’s battery
voltage a factor of 10 and the last calculated altitude (displayed in 1000 foot increments) for three seconds. At the end of the 3 second display, the unit returns to Surface
Mode.
FIG-7
Main Display
LEGEND
REMAIN TIME NDC
MEANING
used to identify the
Battery/Altitude Display
VALUE SHOWN
0:00
PAGE
39
TANK
altitude
2000 feet
above sea level
40
DEPTH
battery voltage
5.8 volts
38
23
Subsurface Mode
FIG-8
Main Display
The Subsurface Mode activates when the dive computer senses a depth greater than
five feet and is exited when the dive computer senses a depth less than three feet.
LEGEND
REMAIN TIME AIR
or
REMAIN TIME NDC
MEANING
VALUE SHOWN
lesser of the two
0:22 (22 minutes of
remaining NDC time)
39
ASCENT
rate at which you are
ascending
11-20 feet per minute*
36
CEIL
ceiling stop
required (if any)
0 feet
37
BOTTOM
bottom time
0:34 (34 minutes)
36
TANK
current tank pressure
1856 psi
40
DEPTH
current depth
46 feet
38
*This is based on the dive computer being set for a fixed ascent rate
of 60 feet per minute.
24
PAGE
FIG-9
Alternate Display
LEGEND
REMAIN TIME AIR
or
REMAIN TIME NDC
MEANING
greater of the two
VALUE SHOWN
PAGE
2:47 (2hours 47 minutes 39
of remaining AIR time)
TEMP
average temperature
58 deg. F
40
BP
current breathing
parameter
34
37
MAX DEPTH
maximum recorded depth 87 feet
38
25
Emergency Decompression Mode
FIG-10
Main Display
Should you exceed your NDC time limit, your dive computer will enter its Emergency
Decompression Mode. Your unit will issue five audible warning chirps and the DEC
legend on your WU will replace the AIR or NDC legend.
WARNING: You should IMMEDIATELY begin your ascent to the proper CEILing
depth upon entering the Emergency Decompression Mode.
Should a diver enter the Emergency Decompression Mode, the following information
is shown on the Normal Display.
LEGEND
REMAIN TIME DEC
MEANING
amount of time
remaining at this
CEILing. *
VALUE SHOWN
0:15 ( 15 minutes)
PAGE
39
CEILING
depth which you
MUST NOT
ascend above.
20 feet
37
BOTTOM
total bottom time
1:56 (1hour 56 minutes)
36
TANK
current tank pressure
1654 psi
40
DEPTH
current depth
25 feet
38
* This value is dependent upon how the dive computer is configured. If BOTH is
selected, then this value could mean the total decompression time left. See section regarding REMAIN TIME DEC for more information.
26
FIG-11
Alternate Display
The following information is provided on the Alternate Display while in Emergency
Decompression Mode.
LEGEND
REMAIN TIME AIR
MEANING
remaining airtime
VALUE SHOWN
0:30 (30 minutes)
PAGE
39
TEMP
water temperature
68 deg. F
40
BP
breathing parameter
22
37
MAX DEPTH
greatest depth reached
on this dive
122 feet
38
27
Gauge Mode
FIG-12
Main Display
NOTE: Only one display is available when in Gauge Mode.
LEGEND
TEMP
MEANING
water temperature
VALUE SHOWN
55 degreesF
ASCENT
rate at which you
are ascending
31-40 feet per minute*
BOTTOM
or
SURF
current time either
3:36 ( 3 hours 36 minutes)36
on surface or submerged
depending on
40
if you are underwater
TANK
tank pressure
1000 psi
40
DEPTH
current depth
22 feet
38
*
PAGE
40
36
This value is correct if your dive computer is set for a fixed ascent rate of 60 feet per
minute. See section regarding ascent rate for more information.
28
Conditions That Will Cause Gauge Mode
Violating certain conditions will cause your dive computer to cease providing remaining
time information and stop calculating nitrogen absorption/elimination. When this occurs, your unit has entered its Gauge Mode. Once in this mode, 24 hours of surface
time MUST elapse before the system will resume its normal operation.
Any one of the following conditions will cause your dive computer to immediately enter
Gauge Mode:
·
More than five minutes elapsed with the depth less than the CEILing.
·
A CEILing depth greater than 90 feet is calculated
·
The maximum functional operating depth of 327 feet is exceeded.
EXCEEDING THE CEILING DEPTH:
If you ascend to a depth shallower than the Ceiling depth when in the Emergency Decompression Mode, the dive computer will issue its chirp alarm continuously and flash
the WARNING legend and the DEPTH digits once a second until you descend back
below the CEILing. If five minutes elapse without this violation being corrected, the dive
computer enters its Gauge Mode.
EXCEEDING A 90 FOOT CEILING STOP:
A Ceiling depth of greater than 60 feet will only occur if you grossly overstay your nodecompression limit. The second that your dive computer calculates that a Ceiling of
greater than 60 feet is required, it will immediately issue its five second chirp alarm. If
the unit determines that you require a ceiling stop greater than 90 feet, the unit will issue
five audible warning chirps and enter Gauge Mode.
EXCEEDING THE MAXIMUM OPERATING RANGE:
The dive computer will continue to operate as long as you DO NOT descend below 327
feet. Descending below 327 feet will cause the dive computer to issue its five second
chirp alarm and enter Gauge Mode.
In Gauge Mode, your dive computer will continue to display DEPTH (if it is 327 feet or
less), TEMPerature, BOTTOM time, ASCENT rate, and TANK pressure.
WARNING: You should wait a minimum of 24 hours before flying or making another dive if your unit has entered Gauge Mode. Failing to do so will greatly
increase your risk of Decompression Sickness.
29
Logbook Mode
FIG-13
Main Display
While your computer is in its normal Surface Mode, you can access the Logbook Mode.
To do this, tap the cross-hatched area labeled "PWR" on the TU.
The Nemesis II has the ability to provide diving data for your past 300 dives beginning
with your most recent dive. To move to the next prior dive, tap the TU again. With each
tap, your computer will move to the next prior dive.
LEGEND
DIVE
MEANING
dive of the day number
VALUE SHOWN
2
FLY
waiting period before
flying.
15 hours
40
ASCENT
the maximum ascent
of the dive.
31-40 feet / minute*
36
TEMP
average water
temperature of the dive
63 deg. F
40
BOTTOM
duration of the dive
1:46 (1 hour 46 minutes) 36
TANK
ending tank pressure
546 psi
40
MAX DEPTH
maximum depth of the
dive
324 feet
38
*Based on a fixed ascent rate of 60 feet per minute.
30
PAGE
38
FIG-14
Alternate Display
LEGEND
REMAIN TIME AIR
MEANING
VALUE SHOWN
the minimum calculation 0:20 (20 minutes)
of either NDC, AIR or the
total decompression time
recorded for this dive.
CEIL
ceiling stop required
0 feet
37
BP
average breathing
parameter for dive
25
37
average depth of dive
40 feet
38
DEPTH
PAGE
39
31
THIS PAGE INTENTIONALLY LEFT BLANK
32
SECTION II EXPLANATIONS
33
THIS PAGE INTENTIONALLY LEFT BLANK
34
EXPLANATION OF FUNCTIONS
Altitude Diving
Your NEMESIS™ II NITROX senses the barometric pressure for altitudes up to 15,000
feet above sea level. Barometric pressures at a given altitude can change due to high
and low-pressure weather systems as well as temperature. Therefore, the displayed
altitude may not be the same as the actual altitude above sea level.
When compared with most analog depth gauges at altitude, the NEMESIS™ II NITROX
will display a greater depth. This is due to the reduced atmospheric pressure at the
surface. Your NEMESIS™ II NITROX is no substitute for the completion of a sanctioned altitude diving course from a recognized recreational dive training agency. The
NEMESIS™ II NITROX will only provide information that will allow the trained altitude
diver to make safe diving decisions. Greater care should be taken when diving at altitude to avoid extending no-decompression times to their maximum limits.
WARNING: Diving at altitude requires a slower rate of ascent as well. Your NEMESIS™ II NITROX will continue to display your rate of ascent as usual, but rates
slower than 60 feet per minute should be used. Your certifying agency in altitude
diving will provide you with their current recommended rates.
Ascent Rate:
Emergency Decompression Mode, Gauge Mode, or Subsurface Mode:
The dive computer performs a continuous four second average of the change
in depth per second to determine the divers ascent rate. For purposes of the
description, this manual will just refer to ascent rate with the reader understanding that this is a four-second averaged ascent rate and not an instantaneous ascent rate.
You can also select between a Fixed or Variable Ascent Rate with the optional
DCI Personal Computer Interface.
FIXED: In the fixed mode, the ascent rate will be fixed throughout the entire
dive profile regardless of depth. The fixed rate set at the factory is 60 feet per
minute. With this default setting, your computer will alarm if you exceed an
ascent rate of 60 feet per minute.
The diver may select fixed rates from 20 to 60 feet per minute.
VARIABLE ASCENT RATE: This feature utilizes several different ascent rates
that are depth dependent. At depths greater than 60 feet, the maximum
allowable ascent rate is set to 60 feet per minute. At depths less than 30 feet,
the maximum allowable ascent rate is set to 30 feet per minute. From depths
between 30 and 60 feet, the maximum allowable ascent rate will be the same
as the current depth. For example, when you are at 43 feet, the maximum
allowable ascent rate is 43 feet per minute.
Logbook Mode: The maximum speed of ascent recorded on the dive is displayed.
35
Ascent Rate Bar Graph:
The Ascent Rate Bar Graph is comprised of a vertical five-segment bar. With the
optional DCI Personal Computer Interface, you can select this bar graph to either
represent the speed of your ascent or a percentage of the selected maximum ascent
rate.
SPEED: With this option, each bar of the graph represents an additional 10
feet per minute of speed. For example, if you were ascending between 11 and
20 feet per minute, one bar segment would illuminate. If you were ascending
between 21 and 30 feet per minute, two bar segments would illuminate, and so
on with all five bar segments appearing when ascending between 51 and 60
feet per minute. The performance of this option remains the same regardless
of the type or the maximum ascent rate selected.
PERCENTAGE: With this option, each bar of the graph represents and additional 20% of the maximum ascent rate selected. For example, if you had
selected a fixed ascent rate limit of 30 feet per minute, each bar segment
would represent an additional ascent rate of 6 feet per minute. (6 is 20% of 30)
This option is especially useful if a variable ascent rate is selected. Regardless of the depth and associated maximum ascent rate, you will quickly be
able to identify if you are approaching 100% maximum limit.
The Ascent Rate Bar Graph is set at the factory to display SPEED.
Batt:
This legend is illuminated when either the battery in the TU or WU is low. If this legend
is flashing, then the battery in the TU is low. If the legend is on solid, then the battery in
the WU is low.
NOTE: If both batteries are low, then the BATT legend will flash. Upon replacement of the TU’s batteries, the BATT legend will then be on solid indicating that
the WU’s batteries need to be replaced.
Bottom:
This is the total bottom time ( displayed in hours and minutes ) calculated for a particular dive. Should a diver ascend to the surface, remain on the surface for less than 10
minutes and then commence another dive, the bottom time will continue to increment as
though there was no time spent on the surface.
Surface Mode: The bottom time of your last dive is provided to you on the Alternate
Display in hours and minutes. At the start of a new dive day, the bottom time
will be 0:00.
Logbook Mode: The bottom time for the profile viewed is displayed on the Main display..
Gauge Mode or Emergency Decompression Mode or Subsurface Mode: Your dive
computer begins to count your bottom time when you have descended below
five feet. Bottom time continues to be counted until you have ascended above
three feet. This time is expressed in hours and minutes.
36
BP:
Breathing Parameter (BP) is a measure of your breathing efficiency. The more you dive,
the more efficient your breathing becomes. With your dive computer, you will be able to
monitor and log your progress. The number displayed is the amount of air you breathe
per minute in psi normalized to the surface (one atmosphere). This data is sometimes
referred to as Surface Air Consumption (SAC). Since Breathing Parameter is a “parameter”, it remains in psi per minute regardless of metric or imperial calculations.
By eliminating the variable of depth, you will easily be able to compare your breathing
rate from depth to depth and dive to dive. As you know, the amount of actual air you
breathe per minute varies proportionate with depth even if your breathing rate remains
unchanged. By normalizing your breathing rate to the surface, an immediate comparison of the rates can be made. For example, let’s say that you made two dives, the first
to 99 feet and the second to 66 feet. Lets also assume that your breathing rate was the
same on both dives; and using the previous example, lets say your BP displayed 23,
indicating your breathing rate as 23 psi per minute normalized to the surface. If depth
entered the equation, your 99 foot dive would display a BP of 92 (23 x 4ATM’s = 92)
while the dive to 66 feet would display a BP of 69 (23 x 3ATM’s = 69). With your dive
computer, you can immediately see that your rate remained unchanged from the first to
second dive. If the actual psi per minute breathed at depth was displayed, you would
have seen two very different numbers, 92 and 69, and you would then have to calculate
further to achieve a comparison.
Since BP is computed by monitoring the drop in tank pressure, a larger volume tank will
show a more efficient BP while the BP of a smaller tank will be less efficient. For normal,
casual sport SCUBA diving on a 10-litre (80 cubic foot tank), a BP of between 18 and 35
is considered normal. Breathing Parameter is computed and updated only at depths
below ten feet.
Subsurface Mode: The averaged Breathing Parameter for the dive in progress is displayed.
Logbook Mode: The average BP for the profile view is provided.
Ceiling:
Logbook Mode: This will show whether or not the dive profile viewed was a no-decompression dive. If you entered Emergency Decompression Mode on that particular dive, the CEILing would display the deepest stop that was required.
Emergency Decompression Mode: The depth above which you must not ascend when
in the Emergency Decompression Mode.
Subsurface Mode: When making a no-decompression dive, the CEILing should read 0
indicating that you may make a direct ascent to the surface without completing
any decompression stops. Should you enter into a decompression situation,
the CEILing will indicate, in feet or meters, the depth to which you must ascend
and complete a Decompression Stop.
37
Depth:
The numbers under the DEPTH legend are used to display the current depth.
Subsurface Mode: The numbers under the DEPTH legend are used to display the
current depth. Your dive computer has the intelligence to automatically determine if you are diving in fresh or sea water thereby providing you with the
actual depth for the type of water in which you are diving.
Emergency Decompression Mode: The numbers under the DEPTH legend are used to
display the current depth.
Gauge Mode: The numbers under the DEPTH legend are used to display the current
depth.
Pedive Prediction Mode: In this mode, the digits under the DEPTH legend indicate the
depth associated with the displayed NDC prediction.
Logbook Mode: The numbers under the DEPTH legend are used to display the average
depth of the dive.
CNS/OTU Toxicity Display: On this display, the number under the DEPTH legend are
used to display the OTU Toxicity percentage.
O2 Mix Display: On this display the number under the DEPTH legend is used to display
the percentage of oxygen in mix #2. This value is displayed as a factor of 10.
For example if your oxygen percentage in Mix #2 is 61.5 percent, then 615
would be displayed.
Battery/Altitude Display: The two digits under the DEPTH legend will indicate the TU’s
current battery voltage as a factor of ten. For example, if the TU’s battery
voltage is 5.8 volts, the two digits under the DEPTH legend would display 58. If
the battery voltage was 5.3 volts, the two digits under the DEPTH legend would
be 53.
Dive:
Surface Mode: The dive number counts the number of dives made in a single “dive
day”. This counter begins with 0 and continues through 9, resetting back to 0
each time the TU is powered on.
Logbook Mode: The dive number in the Logbook Mode will identify which dive of that
particular “dive day” you are viewing. For example, if you had just made your
third dive of the day, the dive number would display 3 for the first profile viewed.
The next would display 2, and the next would display 1. The next would display
the last dive’s DIVE number from the previous day. If you only made two dives
on that previous day, the DIVE number would display 2 and so on.
NOTE: A "dive day" is defined as from the time you turn the TU on an lasting until the
all tweleve half-time compartments reach normal levels. For this reason,
a you may have more than one "dive day" within a single 24 hour period or
a "dive day" may last for more than 24 hours.
Max Depth:
Surface Mode:After your dive, the maximum depth reached on that dive will be displayed up to the maximum gauge depth of 327 feet.
Logbook Mode: The maximum depth recorded on the profile viewed is displayed.
Subsurface Mode: This is the maximum depth recorded during the dive.
38
Metric:
This legend indicates that the dive computer is set to calculate and display altitude,
depth, and tank pressure values in the METRIC mode. Altitude and Depth will be
calculated in meters. Tank pressure will be calculated and displayed in either BAR or
Kg/cm2. You may select the metric display via the optional DCI Personal Computer
Interface.
Remain Time Air:
Predive Prediction Mode: When tank pressure greater than 500 psi is present on the
computer's high pressure transducer, the lesser of either remaining airtime
or the predicted no-decompression time is displayed for each depth.
Subsurface Mode: The display on which this data appears is dependent on whether
the remaining airtime is greater or less than the remaining no-decompression. If the remaining airtime is less than the remaining no-decompression
time, it will appear on the Main Display along with the AIR legend. If the
remaining airtime is greater than the remaining no-decompression time, it
will appear on the Alternate Display along with the AIR legend.
Emergency Decompression Mode: The remaining airtime is always displayed on the
Alternate Display.
Logbook Mode: If during the profile being displayed, the minimum recorded remaining time data was remaining airtime, the Alternate Display will display this
data under the REMAIN TIME legend.
Remain Time NDC:
Predive Prediction Mode: When tank pressure greater than 500 psi is present on the
computer's high pressure transducer, the lesser of either remaining airtime
or the predicted no-decompression time is displayed for each depth. If there
is less than 500 psi present on the computer's high pressure transducer, all
predive predictions will be made using only no-decompression times.
NOTE: If the no-decompression limit for a given depth is less than two minutes,
your dive computer will not make a predive prediction for that depth.
Logbook Mode: If during the profile being displayed, the minimum recorded remaining time data was remaining no-decompression time, the Alternate Display
will display this data under the REMAIN TIME legend.
Subsurface Mode: This is the amount of no-decompression time remaining displayed in hours and minutes.
CNS/OTU Toxicity Display: The number 2:00 under the REMAIN TIME legend is used
to indicate the CNS/OTU Toxicity Display.
O2 Mix Display: The number 1:00 under the REMAIN TIME legend is used to indicate
the O2 Mix Display.
Battery/Altitude Display: The number 0:00 under the REMAIN TIME legend is used to
indicate the Battery/Altitude Display.
39
Remain Time DEC:
Emergency Decompression Mode: The time displayed will be dependent upon how
the dive computer has been setup. The information displayed will be either:
1
Total time to complete all required decompression - or 2
Time Remaining at each individual stop - or 3
Alternating between total and stop time.
If the alternating option is selected, each time is displayed for 2 seconds.
Logbook Mode: If you are viewing an Emergency Decompression dive, the total
required decompression time would be displayed followed by the DEC legend.
Surface Time:
Surface Mode or Gauge Mode: Surface time is displayed in hours and minutes from
the time the TU is turned on or at the end of a dive when ascending above
three feet. Surface times from 0:00 to 17:03 will be displayed.
Tank:
Surface Mode , Subsurface Mode, Emergency Decompression Mode, or Gauge Mode:
The numbers under the TANK legend are used to display the current tank
pressure in 1 psi increments.
Predive Prediction Mode: If the amount of air remaining in your tank allows five minutes or less of bottom time for a given depth during the Predive Prediction
Mode, the tank digits will flash. This flashing will only occur for the predicted
depths which apply.
Logbook Mode: During the first three seconds of display, the total accumulative dive
number is shown, then replaced by the ending tank pressure for the dive profile viewed.
CNS/OTU Toxicity Display: The numbers under the TANK legend indicate the current
CNS Toxicity percentage.
O2 Mix Display: On this display the number under the DEPTH legend is used to display
the user programmed percentage of oxygen in mix #1. This value is displayed
as a factor of 10. For example an oxygen percentage of 21.5 percent would be
displayed as 215.
Battery/Altitude Display: In the Battery/Altitude Display, the number under the TANK
legend are used to display altitude rounded to the nearest thousands of feet
above sea level. For example, if under the TANK legend you see 4, the altitude calculated would be between 3600 feet and 4500 feet
Temp:
Surface Mode: The current temperature that is calculated by the TU will be displayed.
Subsurface Mode: This is the water temperature calculated by the TU.
Logbook Mode: This is the average water temperature recorded for the viewed profile .
40
Time-To-Fly:
Surface Mode: If you plan to fly after diving, you must first allow time for your body to
eliminate all of the residual nitrogen it has absorbed from diving. Your dive
computer calculates this for you and displays the hours you must wait before
safely flying or traveling to altitude after diving. The time calculated includes
an additional 12 hour surface time for added safety. For example, if it would
take your body three hours to eliminate all residual nitrogen, the time-to-FLY
would display 15 hours (three hours plus the 12 hour added safety margin).
Logbook Mode: In the Logbook Mode, the time-to-FLY calculated at the end of that
particular dive profile is displayed.
CAUTION: It is always recommended that you wait at least 24 hours before flying
after diving.
AUDIBLE & VISUAL WARNINGS
In this chapter you will learn to recognize the audible and visual warnings that your dive
computer may issue to alert you of a potentially hazardous condition.
User Defined Maximum Depth:
During the Predive Prediction Mode, you have the ability to define a maximum depth to
which you wish to dive. When the desired maximum depth is displayed during the
Predive Prediction Mode, tap the TU on the circular cross-hatched are identified by
"PWR". Three confirmation beeps will be issued. You may also set this depth via the
optional DCI personal computer interface. Should you descend to a depth deeper than
your selected maximum depth, the DEPTH digits will flash and once every minute, the
five-chirp audible alarm will sound.
1/2 Tank Pressure Alarm:
When you have utilized 1/2 the tanks" usable" pressure, your dive computer will issue a
one time five-chirp audible alarm. If you use all of the "useable" tank pressure, you will
still have a safety reserve of 500 psi. The point at which the 1/2 Tank Pressure Alarm
will sound is easily determined by using the following formula:
( TP - 500)
TP
= 1/2 Tank Pressure Alarm limit
2
Where: TP = beginning tank pressure
For example, let us say you started your dive with a tank pressure of 2500 psi.
(2500 - 500)
2500
= 1500 psi
2
The 1/2 Tank Pressure Alarm would sound at 1500 psi.
41
Low On Air:
Should you approach 500 psi of pressure remaining in your SCUBA tank or five minutes or less of remaining air time, your dive computer will:
Issue a one time, five-chirp audible warning - and
Flash both the WARNING legend and the TANK digits
If you should ever have less than five minutes of remaining air time, your dive computer
will also illuminate the AIR legend on the WU.
The flashing of the WARNING legend and the digits under the TANK legend will continue until the Air Time Remaining is increased to at least ten minutes. This may be
accomplished by ascending to a shallower depth.
If you are in the Emergency Decompression Mode and the remaining air time is either
equal to or is less than the total decompression obligation, both the AIR and DEC legends will appear. Remaining Decompression Time is ALWAYS shown on the Main
Display while the Remaining Air Time in this mode is ALWAYS displayed on the
Alternate Display. On the Main Display, the AIR legend will flash while on the Alternate
Display, the DEC legend will flash.
NOTE: See the section of this manual regarding the Emergency Decompression
Mode for more information.
Ceiling Violation:
When in the Emergency Decompression Mode, ascending to a depth shallower than the
Ceiling depth will cause your dive computer to:
Flash the WARNING legend and the depth digits and
Continuously sound its audible chirp alarm.
NOTE: You will receive a 1.5 second penalty for each second you remain above
your CEILing. If you remain in a CEILing violation condition for more than five
minutes, your dive computer will enter its Gauge Mode.
Breathing Parameter Alarm:
Using the optional DCI Personal Computer Interface, you may enter predefined high
and low limits for Breathing Parameter. If your Breathing Parameter is greater than
your high limit or less than your low limit, your dive computer will issue a five beep alarm
once each minute until your Breathing Parameter is back with the decided range. This
feature is disabled at the factory and can only be enabled via the DCI.
Ascent Rate Alarm:
Your dive computer allows the user to select either fixed or variable Ascent Rate warnings. See the description of Ascent Rate under the EXPLANATION OF FUNCTIONS
section for a description of fixed and variable ascent rates.
42
If you exceed the maximum ascent rate, your dive computer will:
Flash both the WARNING legend and
Sound its audible alarm once every second.
The sound of this audible alarm is unique. Rather than a low-to-high "sweep" in
sound, the Ascent Rate Alarm is a high-to-low "sweep".
Low Battery Voltage:
Both the TU and WU are powered by standard, user-replaceable batteries. The TU is
powered by four, size-AA alkaline batteries and the WU by two size-N alkaline batteries.
Should the WU’s battery voltage become low, the BATT legend on the WU will illuminate. When the TU’s batteries become low, the BATT legend on the WU will flash and
the TU will issue a one time five-chirp audible warning. The batteries should be replaced as soon as possible after the low battery indicators appear.
WARNING: Properly replacing the batteries from the TU will not cause your dive
computer to lose current nitrogen absorption and elimination data for the most
recent dive or dive series. See the section regarding BATTERY REPLACEMENT
in this manual.
Gauge Mode Alarm:
You will hear your dive computer sound its five-chirp alarm just prior to entering the
Gauge Mode. It will re-issue its five-chirp alarm if the TU is powered up within 24
hours after entering Gauge Mode.
You computer will enter the Gauge Mode if:
more than five minutes elapsed with the depth less than the ceiling
or
a ceiling depth of 90 feet or greater is required
or
the maximum functional operating depth of 327 feet is exceeded.
Two-Minute Warning:
Should you have less than two minutes of remaining no-decompression time, your dive
computer will:
issue a one time, five-chirp audible warning
and
flash the WARNING legend on the WU.
60 Foot Decompression Stop Warning:
Should you require a decompression stop greater than 60 feet, the unit will issue a one
time five-chirp audible warning.
Entering Emergency Decompression Mode:
Should you enter Emergency Decompression Mode, the TU will issue a one time fivechirp audible alarm.
43
Oxygen Tolerance Units (OTU) Dose Warning:
Should you reach 75 percent of the allowable Mission OTU dosage, your dive computer will issue a one-time audible warning consisting of short, double-beeps that
sound for five seconds. The WARNING legend will appear and flash and the
TEMPerature digits will be replaced with the current calculated OTU toxicity percentage. This visual warning will continue until the calculated toxicity percentage is less
than 75 percent.
Central Nervous System (CNS) Oxygen Toxicity Warning:
Should you reach 75 percent of the associated maximum limit, your dive computer will
issue a one-time audible warning consisting of short, double-beeps that sound for five
seconds. The WARNING legend will appear and flash and the TEMPerature digits will
be replaced with the current calculated CNS Oxygen Toxicity percentage. This visual
warning will continue until the calculated toxicity percentage is less than 75 percent.
(See FIG-14 which shows a diver that has reached 92% of the allowable maximum
bottom time for any PO2).
NOTE: If both CNS and OTU levels are greater than 75 percent, the more critical
of the two's percentage will be displayed.
FIG-15
OXYGEN TOXICITY WARNING DISPLAY
44
QUESTIONS AND ANSWERS
Should I turn my WU off when it is not in use?
Yes. While your WU is powered by 2 alkaline ‘N’ batteries that will provide over 400
hours of power, you still should turn the WU off when you are going to be away from the
TU for an extended time.
Shouldn’t I take the batteries out of the TU when my dive computer is not going to be
used for several months?
No. Inside your TU is a small lithium battery that provides power for long-term data
storage. Removing the batteries, or leaving fully discharged batteries in the TU, will
cause this coin cell to gradually lose its power.
Is this coin cell replaceable?
The coin cell can only be replaced by Cochran Undersea Technology since it requires
the opening of the TU. By keeping charged batteries in the TU, the battery life of this
coin cell is expected to be over ten years.
When I change the batteries in my TU, will my dive computer retain data for the current
dive?
Yes. Providing you follow the instructions on battery replacement.
When I tapped the TU on, it did not issue the five confirmation beeps, WHY?
The TU may already be on. Turn your WU on to see if the TU is transmitting data. If it
is not, check the batteries to see if their voltage is low. In a noisy environment, such as
on the boat when it is underway, it may be difficult to hear the confirmation beeps.
At what battery voltage will my TU cease to operate?
Fully charged, the four AA alkaline batteries provide six volts. When they discharge to
below 4.5 volts, your TU will not turn on.
Can I turn the TU on underwater?
No. The TU will not turn on if you are underwater. Should you enter the water and begin
a descent without turning the TU on, slowly surface, turn the TU on, wait for it to complete its Self-Diagnostic Mode, and then begin your descent once again.
Is the transmitting range affected by the positioning of the TU and WU?
Yes. The specification sheet of this manual will illustrate the proper orientation for maximum transmitting range. However, in normal diving situations there is sufficient operating range regardless of orientation.
What is the proper way to tighten the TU and WU battery caps?
The caps should be tightened using the enclosed battery removal tool. The o-rings
should not be visible when the caps are properly tightened, but be careful not to overtighten the caps. Once the o-rings are seated, simply hand-snug each cap.
45
What happens if the battery compartments flood?
The electronics of both the TU and WU are completely environmentally sealed. The
construction of the battery compartments will not allow water to enter the electronics. If
you have flooded the battery compartments, first rinse the compartment as soon as
possible with fresh water. Then fill each compartment with alcohol and shake the alcohol to ensure complete rinsing. Drain the alcohol and allow the compartment to air-dry
12 hours with the battery caps off. Discard the batteries. Finally, examine the battery
cap, replace and lubricate the o-rings, install new batteries and reinstall the battery
caps.
Can I transport my dive computer in a watertight container while traveling at altitude?
No. Your dive computer continuously monitors the altitude to perform nitrogen in-gassing and out-gassing. These nitrogen levels are then used when you arrive at the dive
site and intelligently applied to your dive.
What should I do if I have additional questions?
Call us! For your convenience, we are available Monday through Friday, 8:00 a.m. to
5:00 p.m. Central Time. Our staff of certified divers will be glad to assist you by answering any of your questions. Our telephone number is 214.644.6284. You may also FAX
questions to 214.644.6286.
46
SECTION III CARE AND MAINTENANCE
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48
NORMAL CARE AND MAINTENANCE
Rinsing and Cleaning
Your dive computer is designed to require minimum care and maintenance. Both the
TU and WU are molded from fiberglass reinforced resins that are extremely resistant to
salt, chlorine, and exposure to ultraviolet light. However, both the TU and WU contain
sophisticated electronic components, and therefore, require reasonable care and treatment.
·
Avoid sharp impacts to the TU and WU.
·
Do not expose units to extreme heat or cold.
·
Replace batteries when they become discharged, or once a year, whichever
should occur first.
·
Rinse both units with fresh water and allow them to air-dry after each use.
Take special care when rinsing the opening on the TU that is between the
battery caps. DO NOT attempt to clean this area with a pointed object. Doing
so will cause severe damage to your TU, rendering it inoperable.
You can extend the service life of your dive computer by simply rinsing it with fresh
water. When using a garden hose to rinse your unit, keep the water pressure very low.
No chemicals of any type should be used on your dive computer. The WU’s rubber
strap may be conditioned with silicone spray especially developed for use with SCUBA
equipment. You will find this type of silicone spray at your local dive shop. Care should
also be taken to prevent your WU’s lens from becoming scratched or damaged. Minor
scratches will become invisible underwater. However severe gouges or cracks in the
lens would require that it be replaced.
High-pressure Transducer Care
When installing your high-pressure transducer, use an open-ended wrench on the
transducer’s hex nut to tighten. When the TU is not attached to your regulator, replace
the dust cap on the high-pressure transducer to prevent contaminants from entering the
opening.
Battery Life and Replacement
Your dive computer operates on two different sizes of user-replaceable batteries. The
TU requires 4 alkaline ‘AA’ batteries while the WU requires 2 alkaline ‘N’ batteries. We
recommend using only high quality alkaline batteries for both the TU and the WU. Other
types of batteries (such as Lithium and Nickel Cadmium) may permanently damage the
Tank Unit or Wrist Unit and void the warranty. Use of old, off-brand, incorrect and/or
visibly corroded batteries will also affect performance, damage unit, and void warranty.
49
Four fresh AA Alkaline batteries in the TU should provide bottom time and subsequent
off-gassing computation time for approximately 400 hours of normal sport diving use
or one year, whichever occurs first. However, there are factors which can significantly
vary battery operating life. These include:
Original quality of battery as manufactured.
Age of battery prior to installation.
Length of time batteries have been installed.
Frequency and cumulative number of WARNINGS issued by the computer.
Temperature of battery in operation.
·
·
·
·
·
Fresh batteries installed in the TU will read 6 volts. At 5.4 volts the low battery indicator
is shown on the WU. At 4.8 volts, your TU will not turn on.
Normal battery life in the WU should also last for approximately 400 hours of actual
“on” time or one year, whichever occurs first.
Battery Care
Two separate, sealed TU battery compartments isolate the alkaline batteries from the
main computer. Gases given off by the chemical reaction that produces electricity within
batteries react with the metal contacts of the batteries, causing corrosion. Over time,
this coating accumulates and lowers the amount of power the battery can deliver. Even
though batteries that have been in the dive computer for a period of time may indicate
ample voltage, the corrosion interferes with delivery of power from the battery to the dive
computer. Preventive maintenance in the form of the periodic burnishing of the battery's
contacts will greatly reduce this phenomenon.
NOTE: It is always advisable to replace older or questionable TU batteries with
new, fresh batteries before a long series of dives, especially if your dive computer
has been inactive for an extended time.
NOTE: Remember, your TU cannot be manually turned off; and since the TU
computes all of the diving data, turning your WU off will not affect your decompression information. Residual nitrogen elimination, as well as time-to-FLY can
be viewed by turning the WU back on.
50
ANNUAL MAINTENANCE
An Annual Maintenance Service is an important part of your dive computer’s Care and
Maintenance Schedule. It is also necessary to have an Annual Maintenance performed
within 30 days of the first anniversary of the purchase of your dive computer to validate
the second year of your two-year limited warranty.
Your Annual Maintenance includes the following:
·
Tank Pressure Gauge Calibration: The accuracy of this measurement will be
verified and calibrated if necessary.
·
Depth Gauge Calibration: The accuracy of this measurement will be verified
and calibrated if necessary.
·
Temperature Gauge Calibration: The accuracy of this measurement will be
verified and calibrated if necessary.
·
Tank Unit Transmit Range: The transmit range from the TU to your WU will be
verified to be at least three feet and reset if necessary.
·
Battery Voltage: The battery voltage in your TU and WU will be recorded and
new batteries installed, if necessary.
·
Battery Drain Test: The amount of current drain while in use as well as when
dormant will be confirmed to be within specifications, and corrected if necessary.
·
O-rings: All o-rings will be inspected, lubricated, and replaced as necessary.
·
Visual Inspection: Your entire dive computer will be visually inspected for any
cracks or scratches that may lead to potential flooding. Should one be found,
we will contact you to discuss the options available for repair.
·
Pressure Test: Your dive computer will then complete a pressure test.
·
Final System Test: A functional System Test is performed to ensure complete
system operation as well as to confirm that all calibration constants are in place
and functioning.
The cost for your Annual Maintenance is:
International
Continental United States (except Texas)
Texas
$42.50 U.S. Dollars
$35.00
$37.89 ($35.00 + $2.89 tax)
All returns MUST BE freight prepaid which includes any associated fees for customs and duties.
51
To return your dive computer for its Annual Maintenance:
·
Call 214.644.6284 to obtain a Return Material Authorization Number. Items
returned to us without PRIOR authorization will be subject to inspection and
may be refused.
·
Remove the TU from your first stage.
·
Wrap and box the TU and WU in a manner that will prevent each unit from
movement inside.
·
Include any required documentation such as Proof-of-Purchase.
·
Include your name, address, and phone number and place this information
inside the shipping box.
·
On the outside of the box:
Write the Return Material Authorization Number
·
Send the unit to:
Cochran Undersea Technology
Warranty Repair Center
1758 Firman Drive
Richardson, Texas 75081 USA
52
SECTION IV TECHNICAL SPECIFICATIONS
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54
SPECIFICATIONS
(Subject to change without notice)
No-Decompression Model
Algorithm:
Modified Haldanean
Number of Half Time Compartments:
12
Decompression Ceilings
Ceiling Depths:
10, 20, 30, 40, 50, & 60 feet (3, 6, 9, 12, 15, &18 meters)
Altitude Diving Model
Procedure: Altitude adjust is seamless from sea level to 15,000 feet (4600 meters)
above sea level.
FUNCTIONAL MODES
Self-Diagnostic Mode
Surface-Mode
1)
Main Display
2)
Alternate Display
Subsurface-Mode
1)
Main Display
2)
Alternate Display
Predive Prediction Mode
CNS/OTU Toxicity Display
Oxygen Percentage Display
Battery Altitude Display
Emergency Decompression Mode
1)
Main Display
2)
Alternate Display
Gauge Mode
Logbook Mode
1)
Main Display
2)
Alternate Display
Dive Number
Depth
Temperature
Surface Time
Maximum Depth
Tank Pressure
FUNCTIONAL
RANGE
0 - 9 dives
0 - 327 feet
0 - 99.9 meters
0 - 99 deg F.
0 - 37 deg C
0 - 17 hours 03 minutes
0 - 327 feet
0 - 99.9 meters
0 - 5119 psi
0 - 353 BAR
0 - 360 Kg/cm2
INCREMENT
1 Dive
1 Foot
0.1 meter
1 degree
1 degree
1 minute
1 foot
0.1 meter
1 psi
0.1 BAR
0.1 Kg/cm2
55
OPERATIONAL
327 feet / 99.9 meters
327 feet / 99.9 meters
5119 psi
353 BAR
360 Kg/cm2
17 hours 03 minutes
350 dives
9 dives
15,000 feet / 4,600 meters
15,000 feet / 4,600 meters
99 psi per minute
13.6 hours
Depth/Max Depth
Depth Gauge Range
Tank Pressure
Clock Timer
Logbook
Dive Of The Day Counter
Altitude
Altitude Functional Range
Breathing Parameter
Second-by-second Profiles
HARDWARE
Fiberglass reinforced ABS Plastic
Polycarbonate
Casing
Lens Material
Battery
Battery type
Battery Life
Dormant Life
Activation
Switch
Temperature
Depth Gauge
Tank Pressure
Bottom/Surface Time
POWER
TANK UNIT
4 ‘AA’
Alkaline
400 hours
1 year
WRIST UNIT
2 ‘N’
Alkaline
600 hours
1 year
TURN-ON
TU
Sonic/Tank Pressure
WU
Inertial
ACCURACY
+/- 1.5% full scale
+/- 1.0% full scale
+/- 1.0% full scale
+/- 1.0 sec. /24 hours
REPLACEMENT PARTS
High-pressure O-ring:
Tank Unit Battery Cap O-ring:
Wrist Unit Battery Cap O-ring:
56
90D
-207 BUNA N
-038 BUNA N
EPDM
SILICON
SILICON
SECTION V ACCESSORIES
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58
DIAL-A-MIX
LIMITED 90-DAY WARRANTY
To the original owner only, Cochran Undersea Technology, a division of Cochran Consulting,
Inc. guarantees the Dial-A-Mix to be free of defects in both materials and craftsmanship under
normal SCUBA use for 90 days from the date of purchase. Failing to provide proper care will
cause this warranty to be null and void. Any defect not excluded in the limitations section below
will be repaired, replaced, or replaced with a refurbished unit, at Cochran Undersea Technology’s
discretion, free of charge. This warranty does not include charges for shipping and handling.
This warranty IS NOT transferrable. All correspondence concerning this warranty MUST be
accompanied by a photocopy of the original sales receipt.
Your warranty registration card must be returned to Cochran Undersea Technology within 15
days of the purchase date. Failing to do so will cause this warranty to be null and void. The
purchase date recorded on your warranty registration form and the date on the original sales receipt must also match. Should repair be required you may return your Dial-A-Mix to the place of
purchase or you may ship your unit to Cochran Undersea Technology.
LIMITATIONS
This warranty DOES NOT cover any damages that occur from abuse, tampering, or accident.
Additionally, any modifications or repairs performed by anyone other than an authorized Cochran
Undersea Technology Repair Center to this unit will void this warranty. All plastics, rubber or damage due to accident, abuse, modification, or tampering are NOT covered.
STATEMENT OF LIABILITY
It is expressly understood that by buying and/or using the Dial-A-Mix, the diver assumes ALL risk
as to its quality, performance, and accuracy. Cochran Undersea Technology, its distributors, or
retailers will not be held liable for any personal injuries or other damages resulting from its operation, even if Cochran Undersea Technology has been advised of such occurrences and damages.
59
Overview
The Dial-A-Mix is designed to be used with the NEMESIS™ NITROX Dive Computer.
This device allows the user to program into the dive computer a value representing the
percentage of oxygen contained in a given breathing gas mix. It also allows monitoring
of “Mission OTU Dose” and “CNS Oxygen Toxicity Dose” values. Refer to the NEMESIS™ NITROX User’s Manual for definitions of these terms and complete explanation of
use of the NEMESIS™ NITROX Dive Computer.
WARNING: The NEMESIS™ NITROX Dive Computer and the DIAL-A-MIX programming device are to be used only by divers trained and certified in the use of Nitrox
breathing gas mix by an accredited certifying agency.
NOTE: The Dial-A-Mix is NOT waterproof.
Installation
1.
Prior to installing the Dial-A-Mix to the TU, turn the dial on the Dial-A-Mix
clockwise until it stops.
2.
To install, orient the probe of the Dial-A-Mix as shown in FIG-16 then press down
on the probe until it snaps into place.
FIG-16
60
Using The DIAL-A-MIX
1.
Turn on the TU and WU and wait until both have finished their diagnostics before
proceeding.
2.
With the TU in the normal Surface Mode (not Predive Prediction, Post-Dive
Interval, or Logbook mode), tap on the top of the TU in the same manner as if
you were turning it on. The WU display will change to the Dial-A-Mix display
(FIG-17).
FIG-17
3.
Turn the dial fully counter-clockwise then tap the top of the TU again. The WU
will display 'LO' see FIG-18.
FIG-18
61
4.
After approximately three seconds, the WU display will resemble FIG-19. This
is the Mix 1 screen.
FIG-19
NOTE: The WU display will be updated approximately once per second. You
should turn the dial more slowly as you near the value you wish to program in.
5.
Turn the dial to set Mix 1. In FIG-19, the value shown for and oxygen percentage
of 24.8 percent is displayed as 248.
6.
When you have set the desired mix, tap the TU. This sets the Mix 1 oxygen
percentage level and automatically changes to the Mix 2 display. (see FIG-20)
7.
Turn the dial to set Mix 2.
8.
When you have selected the desired mix, tap the TU to set Mix 2.
9.
Immediately remove the probe assembly from the TU immediately.
At this point, the TU will return to the Surface Mode. You should confirm your settings
on the O2 Percentage Display prior to diving.
62
FIG-20
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64
The Analyst Personal Computer Interface
OPERATION OF THE PC INTERFACE
The Analyst Personal Computer Interface is a complete hardware/software system
that uploads data from the NEMSIS II NITROX dive computer to an IBM or compatible
Personal Computer. Along with data that is retrieved from the dive computer, the
Analyst allows the diver to customize the dive computer and also to enter and store
additional information for each dive in a logbook data base.
Features of the Analyst Software Package
UPLOAD all stored information from the dive computer to the Personal Computer's
hard disk drive. Multiple dive computers may be uploaded to the PC. The program
automatically stores data on subsequent uploads from each dive computer to its
unique file on the PC hard drive.
PRINT all charts and graphs using the GRAPHICS function of DOS.
MOVE BETWEEN DIVES instantly by using the - and ¯ keys to move forward and
backward one dive, or the <PAGE UP> and <PAGE DOWN> keys to move 10 dives at a
time. Move to the oldest recorded dive by using the <HOME> key, and to the most recent
dive by using the <END> key. Each dive’s detailed statistics screen, graphic profile
screen, and logbook screen are grouped together, so you can scan from dive to dive,
in any screen type, and instantly recall the other screens for that particular dive.
Minimum Hardware Configuration
For proper operation, your Personal Computer must have the following configuration:
IBM OR COMPATIBLE, 386 or greater
1 MB of RAM
1 MB of available storage on hard disk drive
COM1 OR COM2 (Serial) Port
DOS Ver. 3.0 or Higher
VGA Graphics Card or card capable of VGA emulation
NOTE: To obtain maximum usage of the new Analyst program, you will need a 3button mouse configured into your Personal Computer system.
65
INSTALLATION OF THE ANALYST SOFTWARE TO THE PC
If you are comfortable with installing software and are familiar with the hardware
configuration of your system, follow the instructions in the following section titled "QUICK
START". Otherwise, please go to the "DETAILED SOFTWARE INSTALLATION" section.
QUICK START
1.
Place the installation diskette into your Personal Computer's diskette drive.
2.
Change to that diskette drive.
3.
Type INSTALL, then press <ENTER>.
4.
The installation program will guide you through the different options that need
to be selected to properly install your software.
Having completed the installation process you are now ready to proceed to the section
titled "INSTALLATION OF THE DATA PROBE TO PERSONAL COMPUTER".
DETAILED SOFTWARE INSTALLATION
To install the Analyst software on your Personal Computer (PC):
1.
Power up the PC as usual. Most modern computers provide automatic loading
of the DOS; however, if you are accustomed to “booting up” your computer
before starting any work, you must also do so with the Analyst system.
2.
Insert the Analyst software diskette into your diskette drive. (We will assume
that this is drive A.)
To install the software, type:
A: and press <ENTER> Then type:
INSTALL and press <ENTER>.
The first screen that is displayed will inform you of the minimum hardware configuration
required for the Analyst program to run. You also have the ability, by pressing the <F1>
key to obtain help on how to select the different items on the screen.
When you are ready to continue with the installation select the CONTINUE option;
otherwise select the EXIT option.
Next you are asked for the Destination Directory for the Analyst. The screen displays
C:\ANALYST. The C: represents hard drive C. ANALYST is the name of the subdirectory
which the Analyst program will create and in which the data will be placed. If you wish
to use this default, press <ENTER>. Otherwise, enter the drive and/or subdirectory name
you wish to use.
The next screen asks you to select the serial COM port to which the Analyst probe will
be connected. The only options are COM1 and COM2. You can select the help button
for more information on the COM port selection. Use the - and ¯ keys to move between
the two choices.
66
The next screen allows you to select the type of printer that you have attached to your
Personal Computer system. Use the - and ¯ keys to move between the selections
until you are at the best match for your type of printer. Press <ALT> and <C> at the same
time to continue to the next screen. If you need more information, press the help button
<F1>.
The next screen asks you to "Select Analyst output file method:". If you select the "User
defined Analyst output files", you can create different file names for different Tank Units,
or for different divers.
If you select the "Always use the UPLOAD.CCI" option, only one Tank Unit can be used
with this software package.
You may choose to select this option if only one TU will ever be uploaded to your Personal
Computer. For the greatest flexibility however, Cochran Undersea Technology recommends that you select the "Select Analyst output file method" option.
When you have selected one of the upload functions, press <ENTER>. The installation
program will now copy the Analyst program from diskette to your Personal Computer's
hard disk drive.
The next screen will display the options that you have selected and give you the option
of either running the Analyst program, redoing the installation, or exiting the program.
If you are still unsuccessful with the installation, please contact Cochran Undersea
Technology at (214) 644.6284
INSTALLATION OF THE DATA PROBE TO THE PC
To install the Data Probe to your Personal Computer (PC), locate the COM (Serial) port
on the back of your PC which corresponds to the one you selected during the software
installation. Your PC owner’s manual can assist you in its identification. Plug the Data
Probe directly into the COM port and secure it to the computer.
NOTE: The Analyst interface will only function on COM1 or COM2.
WARNING: Do not attempt to connect the dive computer to any device other than a
serial COM1 or COM2 port of a Personal Computer. The data probe has a 25-pin
connector. Your Personal Computer COM1 or COM2 port may have a 9-pin connector
instead of a 25 pin connector. In this situation, you will need to purchase a 25 to 9
pin adapter. Adapters are available at most computer stores. Many Personal
Computers have a printer port with a connector that resembles the connector of the
Analyst. Do not connect the Analyst to the printer port, or any port other than a COM
port. If you are not positive of the location of the COM port of your Personal Computer,
refer to your PC owner’s manual or contact a computer store for help in locating the
proper connector. Do not attempt to connect the dive computer to a Personal
Computer by any means other than with the Analyst probe. Do not attempt to modify
the connector of your Analyst, other than to install an adapter.
Most NOTEBOOK or LAPTOP computers use a 9-pin sub-D connector. You must use
an adapter to interface the Analyst to these computers. Adapters are available at most
computer stores.
67
ATTACHING DATA PROBE TO DIVE COMPUTER
To install the Data Probe on the dive computer’s Tank Unit:
1.
Position the Tank Unit on a flat surface with its three clips facing upward.
2.
With the probe’s wire at the same end as the Tank Unit’s high-pressure
transducer wire, set the Data Probe’s three metal sections on the Tank Unit’s
three clips and press down to “snap” the probe into place.
NOTE: It is important that the Data Probe is installed in the same direction as shown
in FIG-21.
FIG-21
NOTE: Snapping the data probe onto the sport dive computer will often cause the
dive computer to turn on, with resulting “beeps”. This is normal. It is NOT necessary
for the dive computer to be on for data to be uploaded. However, do not start the
upload while the dive computer is “beeping”.
68
KEYBOARD KEYS AND THEIR USAGE
The following list describes the keyboard key combinations and what function they
perform.
<ALT + B>
Converts the displayed data to METRIC with tank pressure converted
to BAR
<ALT + C>
Selects the CONFIGURATION menu
<ALT + D>
In the CONFIGURATION mode, this will set the dive computer's date
and time to the pc's data and time.
<ALT + F>
Selects the FILE menu
<ALT + I>
Converts the displayed data to IMPERIAL with tank pressure converted to p.s.i.
<ALT + K>
Converts the displayed data to METRIC with tank pressure converted
2
to Kg/cm
<ALT + L>
Selects the LOGBOOK menu
<ALT + M>
Toggles the magnification of the bracketed area on the PROFILES
display OFF and ON.
<ALT + P>
Selects the PROFILES menu.
<ALT + S>
Selects the STATISTICS menu
¬ or ®
Allows you to move left and right across the top bar menu selections.
They also move you between fields in divers' logbook screen. On the
PROFILE screens, these keys move the left vertical marker bar left or
right.
- or ¯
Allows you to move up and down the top bar menu selections.
Depending upon which screen you have displayed, this will also
move you between dives, one dive at a time.
<HOME>
This key takes you to the first dive stored.
<END >
This key takes you to the last dive stored.
<DEL >
In diverslog screen to delete data from one field only.
< ENTER>
In diverslog screen to move forward to next field to enter data.
<TAB >
In diverslog screen to move forward to next field to enter data
<SHIFT + TAB> In diverslog screen to move backward one field.
<PAGE UP >
This key takes you forward ten dives.
<PAGE DOWN > This key takes you backward ten dives.
<BS >
In the diverslog page to erase the previous character.
<ESC >
Return the program to the previous menu.
<ALT + ¬ or ®
®>In the PROFILE screens, these keys move the right vertical marker bar
left or right. In the Configuration Menu, this will allow you to select the
desired setting.
<ALT + DEL>
In diverslog page to clear all data from the current page and return the
cursor to the first field on the screen.
<SHFT + PRNT SCRN > Sends the displayed page to the printer.
0-9
Changes the smoothing effect on the profile screens with 0 being no
smoothing and 9 being the most smoothing.
<ALT + - or ¯ > In the Configuration Menu, this allows you to move from option to
option.
69
UPLOADING DIVE DATA
After the Data Probe is installed on the dive computer and the program is installed on
the Personal Computer (PC), you are ready to upload dive data to a file on the PC. To
do this from the C:\ANALYST> prompt, type:
DCI
and press <ENTER>
FILES
You will now need to open the FILES section to allow you to create, upload, or view your
data files. .
To access the FILES section you can either use your mouse to select the menu option.
When the FILES changes color from blue to red, depress and hold the left mouse
button and drag the cursor “down” until the item you want to perform is selected, then
release the left mouse button.
You may also access the FILES section by pressing on the keyboard <ALT + F>. Then
use the up and down arrow keys to select the item you wish to perform.
You will see a screen display similar to FIG-22 displayed.
FIG-22
70
Should you desire to CREATE, UPLOAD, or VIEW file information, the Analyst package
will display a list of existing files that you may select from. DO NOT include the extension
"N2" when you enter the filename.
Please enter name of new file to be created:
At this point, if you enter a file name (using up to eight characters or numbers) from the
list of files displayed. The file name you create will correspond to one specific dive
computer only. If data from more than one dive computer is going to be stored on your
PC, you will need a unique name for each dive computer. You might incorporate the
name of the dive computer’s owner (“TOMSFILE”) or the Tank Unit SERIAL NUMBER
(“1234FILE”). The program will automatically add the file extension of “.N2”.
NOTE: The dive computer which first uploads data to a given file will be permanently
associated with that file. You will not be able to upload from any other dive computer
using that specific filename.
If you enter a file name which already exists, the PC will prepare to upload data from the
dive computer, then prompt you to position the data probe on the dive computer and
press any key to continue.
While the data is being transferred, a counter will appear on the lower right-hand of your
monitor screen and begin rapidly counting upward. If this counter does not appear, or
if it appears but does not increment after a few seconds, exit the program using the
<ESC> key or you may select the FILES menu option and select EXIT to begin again.
If you have created a file and uploaded data to it for the first time, the program will go
immediately to the main menu page after data is uploaded.
Note that once your dive computer's total storage capacity has been reached, the oldest
data will be "pushed out" of its memory to make room for the most recent. However, your
PC can continue to store new data indefinitely without losing the old.
NOTE: You may initiate an upload to a file, even when there have been no dives logged
on the dive computer.
STATISTICS
You may select the STATISTICS section by using the mouse, as described in the
FILES section, or you may use the keyboard by depressing <ALT + S>. The STATISTICS MENU screen will appear.
There are four different choices that you may choose from the STATISTICS menu.
These are:
GENERAL
THIS DIVE
CONFIGURATION
COMPARTMENTS
FIG-23
FIG-24
FIG-25
FIG-26
71
FIG-23
FIG-24
72
FIG-25
FIG-26
73
On the Compartments graph you will notice three different color bars. The purple bar
stands for ending nitrogen values. The green bar stands for the beginning nitrogen
values for the dive, and the gray bar stands for the current nitrogen values when the
dive was uploaded to this program.
PROFILES
The PROFILES menu provides you with different profiles relating to your dive. These
are:
DEPTH / TANK PRESSURE
FIG-27
DEPTH / BREATHING PARAMETER
FIG-28
DEPTH / ASCENT RATE
FIG-29
DEPTH / TEMPERATURE
FIG-30
DEPTH / NITROX PO2
FIG-31
DEPTH / NITROX CNS%
FIG-32
DEPTH / NITROX OTU%
FIG-33
Each of these graphs may have the jaggedness smoothed out by pressing the number 0 - 9 keys with 0 being no smoothing and 9 being maximum smoothing. You may
also magnify a given area of the graph (see section titled MAGNIFICATION OF AN
AREA for more information). On the bottom of the profile, you may see very short
colored vertical lines. These lines refer to different warnings that the dive computer
has posted. Should you move the left marker line over one of these little vertical lines
the graphic screen informs you as to what type warning was issued.
FIG-27
74
FIG-28
FIG-29
75
FIG-30
FIG-31
76
FIG-32
FIG-33
77
FIG-34
MAGNIFICATION OF AN AREA
To magnify a profile area, first bracket the area to be magnified by using the left and
right mouse button keys. Place the cursor in the vertical area of the graph that you want
expanded. Depress and release the center mouse button.
By depressing the center mouse button again, you will return the display as it was
prior to the expansion selection.
Note: If you are using a two-button mouse, use ALT + M on your keyboard to
magnify. The magnification feature is not available on the PO2, CNS%, or OTU%
profile screens. You may also use the < ¬ or ®
®> to move the left marker and <ALT
+ ¬ or ®
®> to move the right marker.
SMOOTHING
As you view the graphic profiles, you have the ability to view them in extremely fine
detail or in a very "smoothed" detail. The greater the desired smoothing, the more
generalized the profile. By pressing the numbers 0 through 9, you will be able to
change the smoothing of the graph with 0 representing no smoothing and 9 representing maximum smoothing.
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LOGBOOK
You may access this area by using the mouse as described in the FILES section, or
you may depress <ALT + L> on the keyboard. This will display the options available on
the LOGBOOK menu. Selecting any of the options will cause the logbook data entry
screen to appear (FIG-35)
FIG-35
79
CONFIGURATION
This is the area where you configure your dive computer to your personal preferences.
As in previous sections, you may use the mouse to select the configuration menu, or
you may press <ALT + C> on the keyboard.
There are three options that you may select to configure your dive computer. These
are:
STANDARD
FIG-36 This is where you configure the basic functions of your dive computer.
NDC COMPS
FIG-37 This is where you configure the NITROX
and No-Decompression functions of your dive
computer.
DISPLY & ALARM
FIG-38 This is where you configure the DISPLAY
and ALARM functions of your dive computer.
STANDARD FIG-36
80
NDC COMPS FIG-37
DISPLAY & ALARM FIG-38
81
To make a change to your dive computer's configuration:
1) Move the mouse courser to the desired option
2) Press the left mouse button to highlight the option
3) Make the desired change for that option
4) Press ENTER to save the change
If you select another option prior to pressing ENTER, the change WILL NOT be saved.
There are two different types of data entry in each of the three configuration screens.
You will be asked to either 'SELECT' or 'ENTER' the desired data.
If the option asks for you to 'SELECT', use either the right or left mouse button to toggle
between the available selections for that particular configuration option.
If the option asks for you to 'ENTER' your choice, use the number pad to make the
desired selection. In either case, remember to press ENTER before moving to the
next configuration option.
NOTE: If you are not using a mouse, you move to the desired configuration option by
using the <ALT + - or ¯ > and using the <ALT + ¬ or ® > to toggle between the
available selections.
PRINTING
This program's BATCH file contains the DOS print command:
GRAPHICS,GRAPHICS.
During the installation of this program, you were asked to select a compatible printer
option. If you changed printers, reinstall the program and make the desired changes.
For optimum printing quality, you should first change your display to black and white
prior to printing. You can toggle between black and white or color by pressing the F10
key on your keypad.
To print a screen, press <SHIFT + PRINT SCREEN>. The displayed screen will be
printed. To print additional screens, simply repeat this process.
82
DAN RESEARCH FILE
This function allows the user to create three non-comma-delimited ASCII files: one for
depth, tank pressure, and temperature. These files will interface with the Diver's Alert
Network's Project Dive Safety software package. The interval at which this data is
recorded is based upon the selected sampling rate which can be as frequent as once
per second.
To create these files and store their data, you must:
1. Display either the Depth/Tank Profile Screen or the Depth/Temperature
Profile Screen
2. Depress the <F11> key of your keyboard.
NOTE: You must be in the Depth/Temperature Profile Screen in order to create a
temperature research file.
To append to a profile, use same procedure as above, but depress the <F12> key
instead.
The files will be created automatically with the appropriate data stored in them, and
will be named using the following formats:
xxxxyyyy.DPT for the depth file
xxxxyyyy.TNK for the tank pressure file
xxxxyyyy.TMP for the temperature file
where xxxx represents the last four digits of the TU's serial number and yyyy represents the sequential dive number.
For example, if your TU's serial number was 3263 and you were creating a set of
research files for dive number 247, the files would be identified as:
32630247.DPT
32630247.TNK and
32630247.TMP.
By submitting your research files to DAN, you will be assisting in the development of
future decompression algorithms. To obtain additional information regarding this
program, contact:
Diver's Alert Network
Project Dive Safety
3100 Tower Boulevard, #1300
Durham, NC 27707
P. 919.684.2948
F. 919.490.6630
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EXPLANATION OF TERMS
GENERAL STATISTICS
Tank Unit Serial Number: This identifies the entire serial number of your Tank Unit.
Wrist Unit Serial Number: This identifies the entire serial number of your Wrist Unit.
File Originated On: This is the creation date of your filename.
File Last Updated On: This is the date of your last upload to this program.
Manufacture Date: This is the date your computer was manufactured.
Calibration Date: This is the date your computer was last calibrated.
Configuration: This information is needed should you request service.
Analyst Com Port: This identifies the selected Serial Port for your data probe.
Total # of Dives: This identifies the total dives recorded by your computer.
Total Dive Hours: This identifies the total bottom time recorded by your computer.
Total Decompr. Dives: This identifies the total number of dives made that entered
decompression.
Total Decompr. Time: This identifies the total time spent in decompression.
Total # of Warnings: This identifies the total number of warnings issued to date by
your computer.
Total Marginal Dives: This identifies the total number of marginal dives recorded by
your computer.
Total Violated Dives: This identifies the total number of violated dives recorded by
your computer.
The 'Current' Dive Computer Status data displays the recorded values of your dive
computer at the time of the last upload.
BEGINNING STATISTICS
Altitude: This is the surface altitude of the dive rounded to the nearest 1,000 feet
above sea level.
Surface Interval: This is the time between dives on a single dive day, show in hours
and minutes. On dive number 1 of any particular dive day, the surface interval displays
the elapsed time from when you turned-on your dive computer until the dive is initiated.
Tank Pressure: This is the beginning tank pressure
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Breathing Parameter: This is the beginning breathing parameter.
Battery Voltage: This is the voltage of the Tank Unit batteries at the beginning of the
dive.
Time-To-Fly: This is the remaining wait time before flying, as of the beginning of the
dive, shown in hours and minutes.
Dive O2 CNS Dose: This is the beginning percentage of CNS Oxygen Toxicity.
Mission O2 OTU Dose: This is the beginning percentage of Mission OTU Dose
Oxygen Toxicity.
OTU Mission Clock: This is the running Mission OTU Clock at the beginning of the
dive.
ENDING STATISTICS
Maximum Depth: This is the maximum depth reached during the dive.
Bottom Time: This is the total bottom time of the dive. Bottom time begins once you
have descended below five feet and continues until you ascend above three feet.
Tank Pressure: This is the ending tank pressure recorded for the dive.
Breathing Parameter: This is the ending Breathing Parameter for the dive.
Min Battery Voltage: This is the minimum recorded battery voltage of the dive.
Time-To-Fly: This is the wait time before flying, shown in hours and minutes, after the
dive.
Dive O2 CNS Dose: This is the ending percentage of CNS Oxygen Toxicity.
Mission O2 OTU Dose: This is the ending percentage of Mission OTU Dose Oxygen
Toxicity.
OTU Mission Clock: This is the running Mission OTU Clock at the end of the dive.
ADDITIONAL ENDING DIVE INFORMATION
Min Remain Air Time: This is the minimum remaining air time recorded during the
dive, shown in hours and minutes.
Min Remain NDC Time: This is the minimum remaining no-decompression time
recorded during the dive, shown in hours and minutes.
Average Depth: This is the average depth of the dive.
85
NOTE: Your dive computer derives true average depth, temperature, and breathing
parameter by including all depth, temperature, and breathing parameter samples
into the calculation, not just the minimum and maximum samples.
Missed Deco. Time: This is the remaining decompression time after the dive, shown
in hours and minutes. It should read 0:00 on all no-decompression dives and all
emergency decompression dives where the required decompression stops were
completed. Should you omit any decompression stop time, the remaining omitted
time will be displayed here.
Maximum Deco. Time: This is the maximum amount of time you spent in emergency
decompression, shown in hours and minutes.
Missed Ceiling: This is the deepest stop not satisfied while you were in decompression. As with Missed Deco Time, this should be "0" on all decompression dives
where the required decompression stops were completed.
Maximum Ceiling: This is the deepest ceiling that was required for decompression
during the dive.
This Dive's Warnings: This is the total number of warnings that were issued by the
computer during the dive.
Tank Size: This the total volume of the tank(s) that you entered for this dive, to be used
in workload calculations.
Sea/Fresh Water: This identifies they type of water in which the dive was made.
Maximum Ascent Rate: This is the fastest ascent rate recorded during the dive.
Maximum A/R Depth: This is the depth at which the maximum ascent rate occurred.
Maximum A/R Bot.Time: This is the bottom time recorded when the maximum ascent
rate occurred.
Minimum Temperature: This is the coldest water temperature recorded during the
dive.
Average Temperature: This is the average water temperature calculated for the total
dive.
Maximum Temperature: This is the warmest water temperature recorded during the
dive.
Avg Breath Parameter: This is the average breathing parameter for the dive.
Max Breath Parameter: This is the maximum breathing parameter calculated during
the dive.
O2 Mix Switch Depth: This is the depth recorded at the time of the switching to Mix 2.
86
O2 Mix Switch B. Time: This is the bottom time recorded at the time of the switching
to Mix 2.
Maximum PO2: This is the largest PO2 level recorded during the dive.
CONFIGURATION
STANDARD
Dive Time/date Stamp: This is the internal clock setting that is used to timestamp
each individual dive. The time displayed is the recorded time when you began the
current uploading of your dive computer. To change the setting of the clock, highlight
this option and press <ALT + D>. The program will now set your dive computer's clock
to your Personal Computer's internal clock. If you want to change it from this setting,
use the <BACKSPACE> key to erase the setting and enter the desired setting. This
manual entering of the DATE and TIME STAMP must follow the same format by entering day/month/year and then time in hours/minutes/seconds. Press <ENTER> to
save the setting.
Displayed Measurement Units: This identifies whether you dive computer is programmed to display tank pressure, depth and temperature measurements in metric
or imperial units. Use the left or right mouse button to toggle between the two choices.
When the desired setting is displayed, press <ENTER>.
Tank Pressure Metric Measurement Units: If you computer is set to display in the
metric mode, you may select either BAR or kg/cm2 to determine the units in which
pressure is displayed. Use the left or right mouse button to toggle between the two
choices. When the desired setting is displayed, press <ENTER>.
Profile Store Period: This selection determines the resolution in which your dive
profiles are created. You may select from 1 second to 30 second resolution. For each
1 second of profile store period, you gain 13 hours of profile storage space (bottom
time). As long as you upload to this program within the profile storage space, the
Analyst will append or "add" to the previous profiles. It is recommended that you select
the highest resolution profile store period that will provide ample time between uploads. To make this entry, highlight this option with the middle mouse button and
using the keyboard, enter the desired profile store period and press <ENTER>.
Logbook Viewing Time: This option will allow you to select the number of seconds
each logbook display is shown before time-out. To change this "timer", use your PC's
numeric keypad to enter the desired number of seconds, from 10 to 60 and press
<ENTER>.
PreDive Planning Maximum Depth: This option allows you to enter the maximum
depth that will be predicted during the Predive Prediction Mode. You may enter this
maximum depth in 10 foot increments from 30 to 320 feet. To make this entry, highlight
this option with the middle mouse button and using the keyboard, enter the desired
setting and press <ENTER>.
TAP ON Turn-on: This option allows you to either enable or disable the ability to
87
activate you computer via the sonic TAP circuit. Use the left or right mouse button to
toggle between the two choices. When the desired setting is displayed, press
<ENTER>.
NCD COMPS
Nitrogen Computation Conservatism: This options allows you to enter an added
degree of conservatism to the computer's algorithm. The percentage will affect
Equivalent Air Depth. For example, if you select 10% conservatism and make a dive
to 100 feet, the no-decompression algorithm will calculate for a depth of 110 feet or
10% deeper than actual depth. To make this entry, highlight this option with the
middle mouse button and using the keyboard, enter the desired setting and press
<ENTER>.
Temperature Dependent Nitrogen: This option allows you to enable or disable the
temperature compensation in the computer's algorithm. You may wish to disable
this function if you were diving in a dry suit. Use the left or right mouse button to
toggle between the two choices. When the desired setting is displayed, press
<ENTER>.
Ascent Rate Dependent Nitrogen: This option allows you to enable or disable the
fast ascent rate compensation in the computer's algorithm. Use the left or right
mouse button to toggle between the two choices. When the desired setting is
displayed, press <ENTER>.
Workload Dependent Nitrogen: This option allows you to enable or disable the
workload compensation in the computer's algorithm. Use the left or right mouse
button to toggle between the two choices. When the desired setting is displayed,
press <ENTER>.
Enter the BP Workload Computations Tank Size: This is the TOTAL volume of all
connected diving tanks. If you are diving with twin ten-liter tanks, you would enter 20
for this option. If you select zero, the dive computer defaults to a tank size of 10
liters. To make this entry, highlight this option with the middle mouse button and
using the keyboard, enter the desired setting and press <ENTER>.
Select Decompression Time Display: You are given three options for the manner
in which your decompression time is displayed. If you select TOTAL, the decompression time displayed will indicate the total time you will spend in decompression. You should watch the Ceiling depth change in order to identify when to
ascend to the next stop depth. If you select STOP, the decompression time displayed will indicate the time you must remain at the current Ceiling. When this time
is 0:00, the Ceiling depth will decrease and the new stop time will be displayed. If
you select BOTH, the TOTAL time and STOP time will alternate at the rate of once
every 2 seconds. Use the left or right mouse button to toggle between the two
choices. When the desired setting is displayed, press <ENTER>.
88
Select DIAL-A-MIX option: This option enables and disables the ability to use your
computer with the optional Dial-A-Mix field programmer. Use the left or right mouse
button to toggle between the two choices. When the desired setting is displayed,
press <ENTER>.
Select Dual NITROX Blend Switching: This option enables the dual-mix feature of
the algorithm. Once enabled, the dive computer will calculate its algorithm depending on whether you are diving on Mix 1 or Mix 2. Use the left or right mouse button to
toggle between the two choices. When the desired setting is displayed, press
<ENTER>.
Enter Blend #1 Oxygen % in NITROX mixture: This option allows you to enter the
desired oxygen percentage for Mix 1 in 0.01 percent increments. To make this entry,
highlight this option with the middle mouse button and using the keyboard, enter
the desired setting and press <ENTER>.
Enter Blend #2 Oxygen % in NITROX mixture: This option allows you to enter the
desired oxygen percentage for Mix 2 in 0.02 percent increments. To make this entry,
highlight this option with the middle mouse button and using the keyboard, enter
the desired setting and press <ENTER>.
DISPLAY & ALARM
Select One-half Tank Pressure Alarm: This option enables or disables the onehalf tank pressure alarm. Use the left or right mouse button to toggle between the
two choices. When the desired setting is displayed, press <ENTER>.
Select Breathing Parameter Alarm: This option enables or disables the breathing
parameter alarm. Use the left or right mouse button to toggle between the two
choices. When the desired setting is displayed, press <ENTER>.
Enter Breathing Parameter Alarm Lower Limit: If you have enabled the breathing
parameter alarm, you will need to set the lower limit below which the alarm will
sound. To make this entry, highlight this option with the middle mouse button and
using the keyboard, enter the desired setting and press <ENTER>.
Enter Breathing Parameter Alarm Upper Limit: This option sets the upper limit
above which the breathing parameter alarm will sound. To make this entry, highlight this option with the middle mouse button and using the keyboard, enter the
desired setting and press <ENTER>.
Select Depth Alarm: This option enables or disables the depth alarm. Use the left
or right mouse button to toggle between the two choices. When the desired setting
is displayed, press <ENTER>.
Enter Fixed Ascent Rate Alarm Limit: This option allows you to enter the maximum
ascent rate desired before the ascent rate alarm sounds. To make this entry,
highlight this option with the middle mouse button and using the keyboard, enter
the desired setting and press <ENTER>.
89
Select Ascent Rate Bar Graph: This option determines whether you wish the bar
graph to indicate the speed of ascent or the percentage of the selected maximum
ascent rate. Use the left or right mouse button to toggle between the two choices.
When the desired setting is displayed, press <ENTER>.
Enter Ascent Rate Response: This option allows you to tailor the ascent rate
responsiveness. You are given eight different levels of responsiveness. If you find
that the ascent rate alarms sounds too easily for you style of diving, you can "slow
down" the sensitivity by selecting a larger number such as 5 or 6. If you wish for a
very responsive ascent rate alarm, you should select 0 to 3. To make this entry,
highlight this option with the middle mouse button and using the keyboard, enter
the desired setting and press <ENTER>.
Enter Breathing Parameter Response: As with the Ascent Rate Response option,
this option relates to the Breathing Parameter Alarm. To make this entry, highlight
this option with the middle mouse button and using the keyboard, enter the desired
setting and press <ENTER>.
Enter Remaining Time Response: This option determines the responsiveness of
the displayed remaining no-decompression time. If you wish to have you data
"immediately" updated, you should select a setting from 0 to 3. This setting is
suggested for deep, technical diving which usually accompanies fast descent rates.
For recreational diving, a slower responsiveness is suggested. This will prevent
large changes in the remaining no-decompression times while hovering in open
water at very shallow depths. To make this entry, highlight this option with the
middle mouse button and using the keyboard, enter the desired setting and press
<ENTER>.
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