mares 414148-BKSI Color Dive Computer Instruction Manual

: June 29, 2024
: mares

Table of Contents

414148-BKSI Color Dive Computer
Product Information
Specifications:
Product Usage Instructions
Part I – Getting Started
Part II – Advanced Features
- Frequently Asked Questions (FAQ)
Q: Can the dive computer be used for technical diving with
Q: How can I calibrate the compass on the dive computer?

414148-BKSI Color Dive Computer

Product Information

Specifications:

Product Name: Color Dive Computer CEIL-CON
Operating Modes: Various modes for different diving
scenarios
Battery: Rechargeable with charging instructions provided
Communication: Bluetooth connectivity
Features: Digital compass, dive display, pressure information,
gas integration, alarms, and more

Product Usage Instructions

Part I – Getting Started

Glossary: Familiarize yourself with diving
terminologies.
Operating Modes: Understand the different
modes available for diving.
Rechargeable Battery: Charge the battery
following the provided instructions.
Button Operation: Learn how to operate the
device using the buttons.
Digital Compass: Utilize the digital compass
feature for navigation.

Part II – Advanced Features

Nitrox and Altitude: Learn about specialized
diving conditions.
Alarms: Set alarms for ascent rate, gas
levels, and other safety measures.
Dive Profile and Tissue Saturation Graph:
Monitor your dive progress and saturation levels.
Maintenance: Follow maintenance guidelines for
optimal performance.

Frequently Asked Questions (FAQ)

Q: Can the dive computer be used for technical diving with

multiple gas mixtures?

A: Yes, the dive computer supports setting and switching between
multiple gas mixtures for technical diving scenarios. Refer to the
manual for detailed instructions.

Q: How can I calibrate the compass on the dive computer?

A: To calibrate the compass, follow the compass calibration
instructions provided in the manual. Ensure proper calibration for
accurate navigation underwater.

Instruction Manual

Color Dive Computer

CEIL-CON
CEILING-CONTROLLED DECOMPRESSION READ BEFORE ACTIVATING FEATURE
Ceiling-controlled decompression (CEIL-CON) aims to maximize the inert gas pressure gradient in the leading tissue within the limit allowed by your choice of GF LOW and GF HIGH. This results in a slightly higher supersaturation compared to standard decompression, due to the decrease in inert gas tissue pressure during a stationary decompression stop. Figure 1 shows an example of the gradient factor in the leading tissue (GF NOW) for CEIL-CON and for standard decompression, using GF 30/85. As the mechanisms leading to decompression sickness are not yet fully understood, caution should be exercised when performing a ceilingcontrolled decompression. If you are comfortable with a given set of GF low/high for standard decompression, we recommend decreasing both values by 10 when activating the CEIL-CON feature. Perform a sufficient number of dives and become comfortable with the procedure before gradually increasing GF low/high. For more information about ceiling controlled decompression, please check www.mares.com/downloads/ articles. If you have any doubts about CEIL-CON, do not activate it.

· TABLE OF CONTENTS

IMPORTANT WARNINGS

DISCLAIMER

PART I

· 1. INTRODUCTION

1.1. GLOSSARY

1.2. OPERATING MODES

1.3. RECHARGEABLE BATTERY

1.3.1. CHARGING THE BATTERY

1.4. COMMUNICATING VIA BLUETOOTH

1.5. BUTTON OPERATION

1.6. DIGITAL COMPASS

1.7. PRE-DIVE

1.8. MENUS AND SETTINGS

1.9. MOUNTING AND PAIRING OF THE TANK MODULE (OPTIONAL) 11

1.9.1. DIVE DISPLAY AND PRESSURE INFORMATION

1.9.2. INFORMATION PERTAINING TO THE PRESSURE GAUGE

FUNCTION

· 2. SET DIVE

2.1. MODE

2.2. ALGORITHM

2.2.1. MAIN GF

2.2.2. ALTERNATE GF

2.2.3. PERSONALIZATION

2.2.4. REPETITIVE DIVES

2.2.5. MULTIDAY

2.3. CEIL-CON DECO

2.4. MULTIGAS

2.4.1. PREDICTIVE

2.4.2. SWITCH BELOW MOD

2.5. DECO STOP

2.6. FUTURE DECO

· 3. SET SAFETY

3.1. ASCENT VIOLATION

3.2. WARNINGS

3.2.1. MAX DEPTH

3.2.2. DIVE TIME

3.2.3. NO DECO

3.2.4. ENTERING DECO

3.2.5. HALF TANK

3.3. ALL SILENT

3.4. ERASE DESAT

· 4. SET PARAMETERS

4.1. GAS INTEGRATION

4.1.1. COLOR CODING FOR PRESSURE RANGES

4.2. WATER

4.3. BACKLIGHT

4.4. COMPASS TIME

4.5. DEEP STOP

4.6. SURFACING MODE

· 5. SET COMPUTER

5.1. LANGUAGE

5.2. UNITS

5.3. CLOCK

5.4. BRIGHTNESS

5.5. COMPASS DECLINATION

5.6. COMPASS CALIBRATION

· 6. LOGBOOK

· 7. DIVE PLANNER

· 8. INFO

· 9. BLUETOOTH

PART II

· 10. DIVING WITH QUAD CI

10.1. A FEW WORDS ABOUT NITROX

10.2. ALTITUDE

10.3. ALARMS

10.3.1. ASCENT RATE

10.3.2. MOD/PPO2

10.3.3. CNS = 75%

10.3.4. MISSED DECOMPRESSION STOP

10.3.4.1. CEILING-CONTROLLED DECO OPTION

10.3.4.2. ALTERNATE GRADIENT FACTORS AND MISSED

DECO STOP MODE

10.3.5. LOW TANK PRESSURE

10.3.6. LOW BATTERY

· 11. DISPLAY INFORMATION

11.1. DEEP, DECO AND SAFETY STOPS

11.1.1. GF @+3

11.2. FUTURE DECOMPRESSION

11.3. DIVE PROFILE

11.4. TISSUE SATURATION GRAPH

11.5. COMPASS

11.6. ALTERNATE GRADIENT FACTORS

11.7. UNDERWATER MENU

· 12. AFTER THE DIVE

· 13. DIVING WITH MORE THAN ONE GAS MIXTURE

13.1. SETTING MORE THAN ONE GAS

13.2. SWITCHING GAS

13.3. SPECIAL SITUATIONS

13.3.1. SWITCHING BACK TO A GAS MIXTURE WITH LOWER

OXYGEN CONCENTRATION

13.3.2. SUBMERGING BELOW THE MOD AFTER A GAS SWITCH 24

13.3.3. LOGBOOK FOR DIVES WITH MORE THAN ONE GAS

MIXTURE

13.4. DIVING WITH MORE THAN ONE GAS MIXTURE – TRIMIX OR

HELIOX

· 14. BOTTOM TIMER MODE

14.1. DIVE VIOLATION INDUCED BOTTOM TIMER MODE

· 15. TAKING CARE OF QUAD CI

15.1. TECHNICAL INFORMATION

15.2. MAINTENANCE

15.2.1. REPLACING THE BATTERY IN QUAD CI

· 16. WARRANTY

16.1. WARRANTY EXCLUSIONS

16.2. HOW TO FIND THE PRODUCT SERIAL NUMBER AND

ELECTRONIC ID

· 17. DISPOSAL OF THE DEVICE

QUAD CI Dive Computer

· IMPORTANT WARNINGS

No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form without the written permission of Mares S.p.A.
Mares adopts a policy of continuing improvement, and therefore reserves the right to make changes and enhancements to any of the products described in this manual without notice.
Under no circumstances shall Mares be held responsible for any loss or damage sustained by third parties deriving from the use of this instrument.

WARNING
A dive computer is an electronic instrument and as such it is not immune to failure. To protect yourself against the unlikely event of a failure, in addition to the dive computer, also use a depth gauge, a submersible pressure gauge, a timer or watch, and dive tables.
WARNING
Do not dive if the display appears unusual or unclear.
WARNING
The dive computer must not be used in conditions that preclude its use (e.g.: low or no visibility, making it impossible to read the gauge).
WARNING
The dive computer cannot ensure against possible decompression sickness.

DISCLAIMER
This manual describes how to operate an instrument and it describes the information provided by the instrument during a dive.
Neither this manual nor the instrument are a substitute for dive training, common sense and good diving practices.
How the information provided by the instrument is interpreted and put to use by the diver is not the responsibility of Mares. Read the manual carefully and make sure you understand completely how the instrument works and the information it provides during a dive, including information on depth, time, decompression obligations and all warnings and alarms. Unless you fully understand how the instrument works and the information it displays and unless you accept full responsibility for using this instrument, do not dive with it.
WARNING
In particular, unless you fully understand the implications of certain features, you should not use them. Examples of features not to be used unless fully understood are:
– alternate gradient factors
– ceiling-controlled deco
– high oxygen content decompression mixes
– trimix.

· PART I

· 1. INTRODUCTION

1.1. GLOSSARY

ABBREVIATIONS DESCRIPTION

ALT GF:

The gradient factor setting for the alternate/emergency decompression calculation.

AVG:

Average depth, calculated from the beginning of the dive.

CNS:

Central Nervous System. CNS% is used to quantify toxic effects of oxygen.

DECO:

Decompression obligation.

DTIME:

Dive time, the whole time spent below a depth of 1.2m/4ft.

DESAT:

Desaturation time. The time needed for the body to eliminate the nitrogen taken up during diving.

GF:

Gradient factor.

GF END:

The value of GF @SURF at the end of the dive. This value is shown in the LOGBOOK.

GF LOW:

The gradient factor value determining the first stop during ascent in decompression dives. This value is set by the diver.

GF HIGH: GF NOW:
GF SET:
GF @SURF: GF @+3: MAX:

The gradient factor determining the residual nitrogen at the end of the dive. This value is set by the diver.
The gradient factor of the leading tissue during the dive evaluated at ambient pressure. This is calculated by the algorithm and represents inert gas pressure in the leading tissue.
The gradient factor setting used by the computer to finish the dive. It is normally the MAIN GF inclusive, if set, of personalizations, rep dive and multiday, unless there was a switch to the ALT GF, manual or caused by a deco stop violation. This value is shown in the LOGBOOK.
The gradient factor of the leading tissue during the dive evaluated at surface pressure. This is calculated by the algorithm and represents inert gas pressure in the leading tissue.
The prediction of GF @SURF 3 minutes ahead if the diver stays at current depth. This is calculated by the algorithm and represents inert gas pressure in the leading tissue.
Maximum depth attained during the dive.

MAIN GF: MOD:
NO DECO: O2: O2%: ppO2: S. I.: TTS: TTS @+X:

The gradient factor setting for the primary decompression calculation.
Maximum Operating Depth. This is the depth at which the partial pressure of oxygen (ppO2) reaches the maximum allowed level (ppO2max). Diving deeper than the MOD will expose the diver to unsafe ppO2 levels. This is the time that you can stay at the current depth and still make a direct ascent to the surface without having to perform mandatory decompression stops.
Oxygen.
Oxygen concentration used by the computer in all calculations.
Partial pressure of oxygen. This is the pressure of the oxygen in the breathing mix. It is a function of depth and oxygen concentration. A ppO2 higher than 1.6bar is considered dangerous. Surface interval, the time that has elapsed since the end of the dive.
Time To Surface, the time it takes to perform the ascent from your current depth to the surface in a decompression dive, including all decompression stops.
The overall ascent time inclusive of all decompression stops if the dive is extended by X minutes at the current depth.

QUAD CI Dive Computer

TERMINOLOGY Ceiling: Gradient Factor: Heliox:

DESCRIPTION
The depth at which you would exceed the permissible gradient factor. As you clear a stop and begin the next one, the ceiling is the same as or very close to the stop depth itself. As the duration of the stop decreases, so does the ceiling until it reaches the depth of the next stop.
Reduction of Bühlmann’s original value of maximum tolerated inert gas pressure. The term is used for settings in the algorithm. It is also used for the calculated value of inert gas pressure in a tissue so that it can be referenced to the settings in the algorithm.
A breathing gas containing Oxygen and Helium.

Multigas:

Refers to a dive in which more than one breathing gas is used.

Nitrox:

A breathing mix made of oxygen and nitrogen, with the oxygen concentration being 22% or higher.

Nitrogen bar graph:
NO-FLY:

It represents nitrogen saturation (any amount in excess of the equilibrium state at the surface) in the leading tissue. Minimum amount of time the diver should wait before taking a plane.

POST DIVE:

The computer on the surface at the end of a dive. This mode is available until there is remaining desaturation.

ppO2max: PRE-DIVE:

The maximum allowed value for ppO2. Together with the oxygen concentration it defines the MOD. The computer on the surface ready to dive.

Trimix:

A breathing gas containing oxygen, nitrogen and helium.

1.2. OPERATING MODES
The functions of the Quad Ci computer can be grouped into two categories, each corresponding to a specific mode of operation:
· surface mode: Quad Ci is dry on the surface. You can change settings, review your logbook, use the dive planner, see remaining desaturation after a dive, download to smart phone and much more;
· dive mode: Quad Ci monitors depth, time, temperature and performs all decompression calculations; dive mode itself can be broken down into 4 sub categories:
– PRE-DIVE (Quad Ci is on the surface but actively monitoring ambient pressure, so that it can begin to calculate a dive the instant it is submerged below 1.2m/4ft);
– dive;
– surfacing (Quad Ci is on the surface at the end of a dive; dive time calculation is halted but if the diver submerges within three minutes the dive is resumed including the time spent on the surface);
– POST DIVE (after the three minutes of surfacing mode, Quad Ci closes the logbook and reverts to a display showing desaturation time, no-fly time and surface interval; this lasts until the desaturation and the no-fly time both have been reduced to zero).

1.3. RECHARGEABLE BATTERY
Quad Ci uses a rechargeable battery. A full charge allows you up to 20 hours of diving (30 hours without transmitter), depending on the usage of the backlight and the temperature of the water. If during a dive the battery level drops to 15%, Quad Ci will display a low battery warning. When this appears, you should start your final ascent to the surface.
WARNING
– Quad Ci will not enter in dive mode if the battery level is 20% or less.
– Leaving Quad Ci unattended for long periods of time such that the battery will be completely discharged does not harm neither the battery nor Quad Ci. Logbook data and all settings will be saved. After charging you must however set the time and date again.
– When the battery in Quad Ci is completely discharged, it may take up to 20 minutes from the moment it is connected to a power source before Quad Ci reacts.
– Temperature can noticeably affect battery performance. A low battery warning may appear when diving in cold waters even if you think that the battery should have sufficient charge.
– It is advised that you charge the battery if you intend to dive in cold water.

1.4. COMMUNICATING VIA BLUETOOTH
Quad Ci can communicate via low power bluetooth and the apps MARES or MySSI directly to a smartphone to transfer logbook information or to perform firmware upgrades.
To initiate a bluetooth connection, select BLUETOOTH from the main menu or press and hold the bottom right button from the HOME display, then start the Mares or MySSI app on your smartphone and follow the instructions.

The rechargeable battery has a life time of approximately 500 charging cycles. Please contact your authorized Mares dealer if you need to replace it.

1.3.1. CHARGING THE BATTERY
Quad Ci charges the battery via the included clip and USB cable. The battery takes about 3 hours to charge from completely empty to completely full.

1.5. BUTTON OPERATION
QUAD Ci has four buttons, which we refer to as TL (top left), BL (bottom left), TR (top right) and BR (bottom right). Each button can perform two operations, depending on whether it is pressed and released (short press – SP) or pressed and held for one second (long press – LP). A button operation is then defined, for instance, as TL-SP: top left, short press.

LP SP
1s
TL

SP LP
1s
TR

BL
1s
SP LP

BR
1s
LP SP

QUAD Ci switches on in HOME display. BL-SP allows the user to toggle between PRE-DIVE and HOME. In presence of remaining desaturation, the POST DIVE screen is part of this loop.
BOTTOM LEFT – SHORT PRESS

In HOME display: BL: – SP cycles through HOME and PRE-DIVE display; In case of residual nitrogen from a dive, the POST DIVE display is included in this loop. – LP calls up the COMPASS. While in compass, TR-SP sets a bearing, TR-LP erases a set bearing. BL-SP exits the compass.
7

QUAD CI Dive Computer
TL: – SP brings up the stopwatch. In stopwatch mode, TR-SP stops and starts the stopwatch, BR-SP resets the time to zero. The stopwatch does not
feature a lap function. BL-SP exits stopwatch mode and returns to PRE-DIVE. – LP brings up the MENU. Once inside the menu, TR-SP moves up in the list while BR-SP moves down. TL-SP or TR-LP enters the selected line
while BL-SP or BR-LP goes back one level. TR: – SP brings up the ALGORITHM menu (from which you can access the GF settings). BL-SP or BR-LP returns to HOME display. – LP turns on the backlight. BR: – SP brings up the GAS SETTING menu. – LP starts a BLUETOOTH connection.
TOP RIGHT – SHORT PRESS BOTTOM RIGHT – SHORT PRESS TOP LEFT – SHORT PRESS BOTTOM LEFT – SHORT PRESS TOP LEFT – LONG PRESS BOTTOM RIGHT – LONG PRESS BOTTOM LEFT – LONG PRESS
As a general rule, once inside a menu, TR-SP and BR-SP scroll through the options or change a value, TL-SP, TR-LP and BR-LP confirm and either jump to the next option or go back one level, BL-SP goes back one level without saving. Both PRE-DIVE and POST DIVE offer shortcuts to often used functions. From PRE-DIVE, TR-SP allows you to go straight into the gradient factor setting menu. BR-SP allows you go to directly into the gas setting menu (AIR, single gas nitrox, multigas nitrox or multigas trimix). BR-LP brings up the gas table with tank information for all paired and active tank modules.
TOP RIGHT – SHORT PRESS BOTTOM RIGHT – SHORT PRESS BOTTOM LEFT – SHORT PRESS BOTTOM RIGHT – LONG PRESS
From POST DIVE, TR-SP allows you to access the log of your most recent dive. BR-SP gives you direct access to the planner function. BR-LP starts a bluetooth connection.
8

TOP RIGHT – SHORT PRESS BOTTOM RIGHT – SHORT PRESS BOTTOM RIGHT – LONG PRESS
In DIVE MODE BL: – SP cycles through E-Z, FULL, DIVE PROFILE, TISSUE SATURATION GRAPH and LIST OF STOPS (for decompression dives). – LP calls up the COMPASS, While in compass, TR-SP sets a bearing, TR-LP erases a set bearing. BL-SP exits the compass. TL: – SP resets the stopwatch even when it is not visible on the display. – LP brings up the UW MENU (11.7). TR: – SP modifies the information field in the top row momentarily (E-Z) or in the top right corner (FULL) – LP activates the backlight. BR: – SP modifies the information field in the bottom row momentarily (E-Z) or in the bottom right corner (FULL) – LP brings up the GAS SWITCH TABLE
(for multigas dives). The image below provides a schematic view of button function in HOME display and in dive mode.
9

QUAD CI Dive Computer

DIVE

TOP RIGHT – SHORT PRESS BOTTOM RIGHT – SHORT PRESS TOP LEFT – SHORT PRESS BOTTOM LEFT – SHORT PRESS TOP RIGHT – LONG PRESS BOTTOM RIGHT – LONG PRESS TOP LEFT – LONG PRESS BOTTOM LEFT – LONG PRESS

DCO49 / QUAD Ci / FIG. 6 OVERVIEW TOP RIGHT – SHORT PRESS BOTTOM RIGHT – SHORT PRESS TOP LEFT – SHORT PRESS BOTTOM LEFT – SHORT PRESS

TOP RIGHT – LONG PRESS BOTTOM RIGHT – LONG PRESS TOP LEFT – LONG PRESS BOTTOM LEFT – LONG PRESS

BACK TO MAIN SCREEN

RST SW

FULL DISPLAY

BACK TO MAIN SCREEN

RST SW

E-Z DISPLAY

TIME-OUT 5S
TIME-OUT 5S
TIME-OUT 5S BACK TO E-Z DISPLAY

BACK TO MAIN SCREEN

1.6. DIGITAL COMPASS
Quad Ci has a tilt-compensated digital compass which can be used at almost any inclination. The compass can be called up at any moment on the surface or during a dive by BL-LP. With TR-SP you can set a reference bearing.This is useful for instance if you are on a boat and there is a landmark on the shore that you can use for alignment to reach a specific spot on that dive site. A triangle will appear to indicate the set bearing. Additional symbols will appear as well: squares at 90 degrees, triangles at 120 degrees and two parallel lines at 180 degrees, as an aid in navigation for square, triangular and reciprocal courses. Once underwater, align the arrow and start swimming in that direction.
The number underneath the ribbon represents the deviation of the direction you are pointing at with reference to the set bearing. In dive mode the stopwatch appears next to it, useful to time legs of a course.
Repeating TR-SP sets a new bearing, while TR-LP erases the set bearing.
BL-SP exits the compass and returns to HOME display or dive display.
1.7. PRE-DIVE
BL-SP puts Quad Ci into PRE-DIVE mode, which means that Quad Ci is ready to start a dive. From this mode you still have quick access to the ALGORITHM menu (TR-SP) and the GAS SETTING menu (BR-SP).

1.9. MOUNTING AND PAIRING OF THE TANK MODULE (OPTIONAL)
Quad Ci can communicate with up to 5 tank modules regarding tank pressure and gas consumption information. Each tank module needs to be mounted on a high pressure port of a first stage regulator.
In order for Quad Ci to display tank pressure and gas consumption information, you must first establish a channel of communication between the tank module and Quad Ci. This is called pairing. This operation needs to be performed only once and ensures a permanent and interference-free link between the two devices.
NOTE To perform the pairing operation, the tank module must be pressurized to at least 15bar/220psi. Hence it must be mounted on a first stage regulator, which is itself mounted on a full scuba tank and the valve opened.
To mount the tank module on the first stage regulator, first remove the high pressure port plug, then screw in the tank module gently by hand until you feel a minimum of resistance, then use a 19mm wrench to tighten it.

transmission, we recommend positioning the tank module as described below.
To pair the tank module with the Quad Ci, proceed as follows: – Go into SET PARAMETERS/GAS
INTEGRATION/PAIR DEVICES – Choose the channel that you wish to assign
to the device (if this is your only tank module for single gas diving, choose G1. G2 through G5 are used for multigas dives. More information on this in section 13); – The message WAITING FOR PAIRING OPEN THE TANK appears on Quad Ci. – Keep Quad Ci within 1 m / 3 ft of the tank module and open the tank. The message READY FOR PAIRING appears on Quad Ci. If RADIO ERROR appears, exit with BL-SP and repeat. – Place Quad Ci against the tank module as shown below. Quad Ci must touch on the tank module.

1.8. MENUS AND SETTINGS

TL-LP calls up the menu of settings and functions.
TR-SP advances in one direction, BR-SP advances in the other. TR-LP or TL-SP enters the highlighted line item, whereas BR-LP or BL-SP goes back one level. Some menus allow you to go deeper into another menu, some allow you to set a value, change a setting or perform an operation (such as pairing of a transmitter). TR-SP advances in a list or increases a value, BR-SP advances backwards in a list or decreases a value. TR-LP or TL-SP confirms a setting and goes back one level. BL-SP goes back one level without confirming.
The menu contains the following entries:
– SET DIVE – section 2
– SET SAFETY – section 3
– SET PARAMETERS – section 4
– SET COMPUTER – section 5
– LOGBOOK – section 6
– PLANNER – section 7
– INFO – section 8
– BLUETOOTH – section 9

NOTE – Do not force the tank module while
holding it by the plastic cap.
– Do not overtorque while using the wrench: the o-ring seal is assured as soon as you feel the first resistance. The only reason for using a wrench to tighten a bit more is to prevent the tank module from unscrewing itself over time.
The Mares tank module communicates via radio frequency with Quad Ci. For best

20 bar / 300 psi
– Within 30 seconds you should see the message PAIRING OK. This means you are done. If you see the message PAIRING FAILED you need to repeat the whole procedure. If more than two minutes have elapsed since you opened the tank, you must turn off the valve and depressurize the first stage completely, then wait 1 minute before attempting again.

QUAD CI Dive Computer

NOTE – When diving with more than one gas
mixture, tanks G1 through G5 must be set to increasing oxygen levels. Refer to section 13 for more information on multigas diving.
– A tank module can only be paired to one channel on one Quad Ci. If you pair the same tank module to a second channel on the same Quad Ci or to a second Quad Ci, the first one will be erased.
After a successful pairing of G1 to Quad Ci, the pre-dive display will show the tank pressure in either bar or psi. If G1 has been paired but Quad Ci is not receiving any signal, it will show – – – instead of a pressure value.

1.9.1. DIVE DISPLAY AND PRESSURE INFORMATION
From the factory Quad Ci has no paired transmitters and on a dive the display would be optimized for use without tank pressure (Figures A and B). As soon as you pair a transmitter to G1, the display automatically switches to the format with tank pressure (Figures C and D). If for any reason you want to switch back to the dive display without tank pressure (maybe because you are on a liveaboard, the transmitter has a dead battery and you are using a standard pressure gauge), you can DEACTIVATE the transmitter with TL-LP from the PAIRING menu. TL-LP will reactivate the transmitter again once you are ready to return to the display with transmitter.

NOTE – The Mares tank module has a range of
approximately 1.5m/5ft.
– If a tank module battery is weak, Quad Ci alerts you with a screen message referencing the channel designation assigned to the tank module in question.
– During a dive, you can ask Quad Ci to display the battery status of the tank module. More information about this in section 10.3.6 and 11.
WARNING
– If Quad Ci receives no signal from the tank module for 45 seconds, the pressure value is replaced by —. Check the position of Quad Ci with respect to the tank module. Start ascending if you don’t get a tank pressure reading unless you have a spare pressure gauge.
– If the tank pressure reaches 10bar/145psi, the tank module will turn off and Quad Ci will not show tank pressure any longer.
Refer to the dedicated tank module manual for information on how to replace the battery in the tank module.
NOTE – You do NOT need to repeat the pairing
procedure after a battery replacement in the tank module.
– You do NOT need to repeat the pairing procedure if the battery in Quad Ci is completely empty.
– You do NOT need to repeat the pairing procedure after upgrading the firmware in your Quad Ci.

Fig. E

1.9.2. INFORMATION PERTAINING TO THE PRESSURE GAUGE FUNCTION

The pressure gauge (tank module) described

in this manual is manufactured by Mares SpA,

Fig A

Salita Bonsen 4, 16035 Rapallo, Italy.

The accuracy of the pressure measurement is:

at 50bar ± 5bar

at 100bar ± 10bar

at 200bar ± 10bar

at 300bar ± 15bar

at 750psi ± 75psi

at 1500psi ± 150psi

at 3000psi ± 150psi

at 4350psi ± 220psi

Connecting port airflow: <100 liters/min. at a

Fig B

pressure of 100 bar.

CE CERTIFICATION The pressure gauge is a Category III device as defined under European Regulation 2016/425, and complies with the specifications set out in the harmonized European Standard EN250:2014 for use with air. It is compliant with the specifications set forth in the harmonized European Standard EN 13949:2003 for use with oxygen-rich mixtures (Nitrox).

The pressure gauge described in this

Fig C

instruction manual has been tested and

CE certified to a maximum depth of 50m by

Registered Test Center 0474 – RINA Via Corsica

12, 16128, Genova, Italy.

APPLICATION The submersible pressure gauge is a safety device for monitoring residual pressure in the tank, designed to be used as part of a SCUBA set (open-circuit, self-contained underwater breathing apparatus).

The gauge can be used in cold water (below 10

°C / 50 °F). Maximum operating depth is 150 m

Fig D

/ 492 ft.

The pressure gauge must not be used in conditions that preclude its use (e.g.: low or no visibility that makes it impossible to read the gauge) and under which it is necessary to use appropriate safety devices.

The pressure gauge is designed for use exclusively with Nitrox, up to 100% oxygen.

The use of air (EN 12021) or any mixture other than Nitrox or oxygen would contaminate the equipment, requiring cleaning and servicing by a Qualified Technician at a Mares Lab Service Center before it can be used with nitrox or oxygen again.
It must be kept in mind that the depth and duration of the dive are strictly dependent on the percentage of oxygen in the breathable mixture.
WARNING
Training is compulsory before the device described in these instructions may be used.
The user must have received adequate prior training on the use of SCUBA diving equipment, both for use with air and for use with Nitrox.
WARNING
Gaskets and o-rings for the Nitrox pressure gauge must be lubricated exclusively with oxygen-compatible grease; in the presence of oxygen-rich mixtures, the use of other types of lubricants may spark an explosion.
WARNING
In the event of use with mixtures contaminated with oil, the entire system must be cleaned and serviced by a Qualified Technician at a Mares Lab Service Center.
CHECKS PRIOR TO USE, PREPARING FOR THE DIVE AND USE Slowly open the tank valve to avoid the “water hammer” effect resulting from the high pressure entering the tank module.
When using Nitrox or oxygen, always open the tank valve very slowly to reduce the risk of an explosion.
Once the tank valve is open and the system is pressurized, close the valve and make sure there are no leaks, checking that the pressure indicated by the dive computer is stable and does not drop. If a drop in pressure is detected, do not dive and double check the entire system.
During the dive, remember to check the residual pressure frequently.
In addition to a numeric value for the tank pressure, Quad Ci uses color coding for an immediate at-a-glance tank pressure visualization. The color is applied to the lower screen divider bar. When the tank pressure reaches 50 bar / 500 psi, the inside of the bar turns red, to alert the diver of a low tank pressure situation.
The tank module must only be used with CEmarked SCUBA components.

MARKING The instrument markings are the following:
· EN250: tested and certified according to European Norm EN250;
· CE 0474: CE conformity and identification number of notified body controlling production in compliance with Module D of European Regulation 2016/425
· 300 bar: maximum operating pressure
· NITROX/O2: tested and certified according to European Norm EN 13949.
CARE, STORAGE AND TRANSPORT Rinse your regulator and tank module thoroughly in fresh water after every dive. Ensure that the dust cap is installed on the first stage prior to doing so. Store the regulator and tank module in a dry place away from direct sunlight. When travelling with your equipment, it is best to use a padded bag such as is commonly used to transport diving equipment.

· 2. SET DIVE

MENU SET DIVE MODE
ALGORITHM
CEIL-CON DECO
MULTIGAS
DECO STOP
FUTURE DECO

Description
Allows you to choose between air, nitrox, trimix and bottom timer mode.
Allows you to set gradient factors, personalization levels, and more.
Allows you to switch between staged decompression and continuous ascent (CEILing CONtrolled).
Allows you to define parameters relating to multigas dives.
Allows you to choose the depth of the shallowest stop among 3m/10ft, 4.5m/15ft, 6m/20ft.
Allows you to set the parameters for the future deco prediction. Please refer to section 2.6 for more details on this.

2.1. MODE
In this menu you define the type of gas you will be breathing during the dive (AIR as SINGLE GAS, NITROX as SINGLE GAS, NITROX as MULTIGAS, TRIMIX as MULTIGAS). You can also set Quad Ci to BOTTOM TIMER, in which case Quad Ci will show only time, depth and temperature: it will not carry out any decompression calculation and it will not show any warnings and alarms.
Use TR-SP or BR-SP to highlight your choice, then press TL-SP or TR-LP to activate it. AIR is the equivalent of setting NITROX to 21% and a ppO2max of 1.4bar.
When selecting NITROX, you are taken to a submenu in which you can define the

percentage of oxygen in the mixture (O2%) and the maximum value of oxygen partial pressure (ppO2max) for up to three breathing mixes. The maximum possible value for the ppO2max is 1.6bar. Most training agencies recommend not to exceed a value of 1.4bar.
Once inside this menu, use TR-SP or BR-SP to change the O2%, and watch how this affects the maximum operating depth (MOD). Then with TL-SP or TR-LP move on to the ppO2max and use TR-SP or BR-SP to change the value, again noticing how this affects the MOD. With TL-SP or TR-LP save and exit the menu. Note that you can press BR-LP after having set the O2% to save and exit skipping the ppO2max setting.
WARNING
– Diving with Nitrox may only be attempted by experienced divers after proper training from an internationally recognized agency.
– Before every dive and after changing the tank, you must make sure that the set oxygen concentration in Quad Ci corresponds to the oxygen concentration in the tank. Setting the wrong oxygen concentration can lead to serious injury or death.
This is also the menu where you would be setting your decompression gases if you dived with more than one gas. See chapter 13 for more information about diving with more than one gas or for dives with trimix.
With BR-SP from HOME or PRE-DIVE you have direct access to the gas setting menu.
2.2. ALGORITHM
Quad Ci employs the unmodified Bühlmann ZH-L16C algorithm with gradient factors. Gradient factors are used to lower the maximum tolerated inert gas pressure in the tissues with respect to Bühlmann’s original values. This results in less nitrogen in the body at the end of the dive, which under normal circumstances makes the dive safer. Gradient factors are expressed in pairs: the first value, also called GF low, represents the reduction of the original Bühlmann value that defines the beginning of the final ascent (relevant only in decompression dives); the second value, also called GF high, represents the reduction of the original Bühlmann value that defines the residual nitrogen at the surface at the end of a dive. As an example GF 50/85 will get you to the surface with a 15% lower gradient factor with respect to Bühlmann’s original maximum tolerated inert gas pressure and, if this was a decompression dive, your first decompression stop would have been at a depth such that you would not have exceeded 50% of the gradient factor with respect to Bühlmann’s original value at that depth.
For more information about gradient factors, please refer to www.mares.com/downloads/articles
TR-SP from HOME or PRE-DIVE gives you direct access to the ALGORITHM menu.

QUAD CI Dive Computer

2.2.1. MAIN GF
This is where you set the conservatism level of the ZH-L16C algorithm via gradient factors. We use Bühlmann’s original values reduced by 15% as a starting point, and you can make the algorithm more conservative from there. There are four predefined sets of gradient factors with increasing conservatism from R0 (85/85) to R3 (50/60) for recreational dives and from T0 (30/85) to T3 (25/40) for tech dives. You can also enter the GF low and GF high values directly via the CUSTOM setting. The default value is R0 (85/85).
2.2.2. ALTERNATE GF
Quad Ci allows you to define an alternate set of gradient factors, to use when you need to cut your decompression short in case of an emergency. The set of alternate gradient factors cannot be more conservative (i.e. lower) than the main set of GF values. The default value is R0 (85/85).
2.2.3. PERSONALIZATION
This menu allows you to define additional conservatism in a way similar to going from R0 to R1, R2 or R3 but in a more personal way. It has three submenus, called PHYSIO, DIVE, I TODAY. The values set in each menu are subtracted from the MAIN GF values yielding the values used by Quad Ci for the decompression calculations.
PHYSIO allows you to define an additional conservatism based on how you feel about yourself and diving overall. Each step from LOW to MEDIUM to HIGH incrementally reduces both gradient factor values by 10. There is also a setting called ADVANCED, which increases the gradient factor by 5 so that a maximum of 90/90 can be achieved. This is only for experienced divers who have accumulated enough experience to know they can tolerate such levels of inert gas. We do not recommend doing this since it increases the risk of decompression sickness thus Quad Ci requires that you insert a code (1234) to allow the setting.
The value set in PHYSIO remains stored until you manually change it. The default value is OFF.
DIVE allows you to define an additional conservatism based on how you feel about the dive conditions. Each step from LOW to MEDIUM to HIGH incrementally reduces both gradient factor values by 3. If you think there will be much current or the water will be very cold, pick one of these settings. Since conditions can actually be different from what you expected, this parameter can be edited also DURING the dive (via the underwater menu). The default value is OFF.
The value set in DIVE resets automatically to OFF at midnight.
I TODAY allows you to define an additional conservatism based on how you feel about yourself today, for instance to account for a restless night or not having hydrated sufficiently. Each step from LOW to MEDIUM to HIGH incrementally reduces both gradient factor values by 5.
The default value is OFF. Also the value set in I TODAY resets automatically to OFF at midnight.

2.2.4. REPETITIVE DIVES
The original Bühlmann algorithm assumes normal offgassing of inert gas via diffusion after a dive. This seems to work well for most people and indeed most dive computers available today compute repetitive dives like this. There is evidence however that some people produce bubbles after a dive, or produce more bubbles than others, and these bubbles though harmless slow down the offgassing process. Surface intervals of three hours or longer are known to dissipate most if not all bubbles. Quad Ci allows you to account for this by applying an additional conservatism to repetitive dives, reducing both gradient factor values by 8 upon surfacing from a dive and then increasing it again by 1 every 15 minutes of surface interval. When setting REP DIVE to ON you will have recovered the full gradient factor values after a two-hour surface interval. Any dive started before such surface interval will carry an automatic additional gradient factor reduction. If you set the value to OFF, the GF values are not modified during a surface interval.
2.2.5. MULTIDAY
Increasing inert gas load on your tissues over several days of diving has effects that are not fully understood and are different from person to person. Most dive computers available today do not account for this and compute simple inert gas offgassing by diffusion. Quad Ci allows you to increase the conservatism automatically for each day of diving with less than 24-hours of surface interval by reducing both gradient factor values by 2 on the second day, an additional 2 on the third day and an additional 2 on the fourth day up to a maximum of 6.
2.3. CEIL-CON DECO
This feature allows you to decompress following the ceiling (0.1 m / 1 ft decrements) instead of the common 3 m / 10 ft steps. This is particularly advantageous when the difference between GF low and GF high is considerable. Turning this option ON makes the CEILING become the default indication in the upper right corner of the display once you are within 3 m / 10 ft of the deepest stop, and allows you to ascend to the ceiling without incurring into a deco stop violation. The decompression schedule itself is still displayed in the usual 3 m / 10 ft steps. Once the ceiling has reached the value of 6.0 m / 20 ft, the remainder of the decompression has to be carried out in the standard way at 6.0 m / 20 ft and, if applicable, at 4.5 / 15 ft m or 3.0 m / 10 ft. In order to remind the diver of this, the upper right field will show STOP followed by depth of the stop. The actual ceiling can still be called up but within 4 seconds STOP and the depth of the stop are shown again.
NOTE When CEIL-CON is turned on and you have a decompression obligation, the display defaults to FULL. E-Z is not available anymore due to the fact that near the decompression stop the CEILING has to be displayed next to the current depth.

2.4. MULTIGAS
2.4.1. PREDICTIVE When set to ON, Quad Ci will consider all gases in the decompression calculation, with switches carried out at the MOD of each gas. When set to OFF, the decompression calculation will consider the currently breathed gas only. See Section 13 for more information about the PREDICTIVE feature. The default value is ON.
2.4.2. SWITCH BELOW MOD When set to ON, Quad Ci will allow a switch to a gas at a depth deeper than the MOD of the gas (resulting in an immediate MOD alarm). The default value is ON.
2.5. DECO STOP
This menu allows you to choose the depth of the shallowest stop among 3m/10ft, 4.5m/15ft and 6m/20ft. Decompression times increase when the shallowest stop is deeper. For the setting to be active the following conditions have to be met: – predictive multigas is ON; – at least one gas is set to an oxygen
percentage of at least 50%; – when prompted to do so, the gas switch is
carried out. If these conditions are not met, Quad Ci will recalculate the decompression with a 3 m / 10 ft shallowest stop.
2.6. FUTURE DECO
In this menu you can define the parameters of the future deco prediction and of the runaway deco alarm. Refer to section 11.2 for more information.

· 3. SET SAFETY

Description

SET SAFETY

ASCENT VIOLATION

Allows you to turn off the dive violation due to uncontrolled ascent. This is for dive instructors only, who may find themselves in such a situation because of their teaching requirements.

WARNINGS

Allows you to define and activate certain warnings individually.

ALL SILENT

Allows you to silence the dive computer.

ERASE DESAT

Allows you to reset the inert gas saturation to zero, thereby erasing the effects of a previous dive. This is only for people who plan to lend their computer to another diver who has not performed a dive within the last 24 hours.

3.1. ASCENT VIOLATION

3.4. ERASE DESAT

4.1. GAS INTEGRATION

If the ascent rate exceeds 120% of the allowed value over a depth change of more than 20m/66ft, due to the potential of harmful bubble formation, Quad Ci locks the computer for 24 hours in order to prevent you from diving again. In this menu, you have the option to disable the locking up of the computer in the event of an uncontrolled ascent.
WARNING
– An uncontrolled ascent increases your risk of decompression sickness (DCS)
– This feature is intended for very experienced divers only, such as dive instructors, who take full responsibility for the consequences of turning off this function.
3.2. WARNINGS

Quad Ci allows you to reset the desaturation in the computer. Any tissue saturation information from a recent dive will be reset to zero and the computer treats the next dive as a non-repetitive dive. This is useful when the computer is loaned to another diver who has not dived in the last 24 hours.
WARNING
Diving after having reset the desaturation is extremely dangerous and is very likely to cause serious injury or death. Do not reset the desaturation unless you have a valid reason to do so.
Once inside the menu, you must enter the security code once you decide to proceed with the reset. The security code is 1234.
After entering the security code you will get a confirmation of the successful completion of the operation.

3.2.1. MAX DEPTH Quad Ci allows you to set an alarm at a depth independent of the MOD. The default value is OFF. Using TR-SP or BR-SP you can set it between 10m / 30ft and up to just shy of the MOD, in 1m / 5ft increments. Upon reaching the defined depth an alarm similar in behaviour to the MOD alarm (section 10.3.2) is triggered, albeit with the message MAX DEPTH REACHED.
3.2.2. DIVE TIME Quad Ci allows you to set a time alarm, triggering also a warning at half of the set time limit. The default value is OFF. Using the TR- SP or BR-SP buttons, you can set the value between 20 and 90 minutes in 2-minute increments. Upon reaching half of the set limit, the message TURN AROUND appears and stays on the display until you hit any button to acknowledge it. Upon reaching the set time limit, the message TIME LIMIT appears and stays on the display until you hit any button to acknowledge it.
3.2.3. NO DECO When this is set to ON, a warning will alert you when the NO DECO time reaches 2 minutes.
3.2.4. ENTERING DECO When this is set to ON, a warning will alert you when a mandatory decompression stop has been calculated by Quad Ci.
3.2.5. HALF TANK This allows you to turn off the half tank warning described at 4.1.
3.3. ALL SILENT
In this menu you can disable audible alarms.
WARNING

· 4. SET PARAMETERS

Description

SET PARAMETERS

GAS INTEGRATION

Allows you to synchronize your Quad Ci with optional tank modules and to define all parameters concerning gas integration (tank volume, operating tank pressure, tank reserve and more).

WATER

Allows you to choose between salt and fresh water.

BACKLIGHT

Allows you to choose between AUTO-OFF (the backlight stays on for only 6 s) or PUSH ON/PUSH OFF (the light stays only until you turn it off manually).

COMPASS TIME

Allows you to set the duration of the compass display before it reverts back to the dive data. You can set this value to 15 seconds or PUSH ON/PUSH OFF. If set to PUSH ON/PUSH OFF, you exit compass mode with BL-SP.

DEEP STOP

Allows you to activate or deactivate the visualization of deep stops.

SURFACING MODE

Allows you to set the time interval after surfacing before the dive is closed.

Disabling audible alarms can lead you into potentially dangerous situation and could result in serious injury or death.

This menu contains five submenus. The first one allows you to pair the tank modules to Quad Ci. Please refer to section 1.9 for the description of the pairing process.
The second menu, TANK VOLUME, allows you to set the size of the volume of the tank, individually for G1 through G5. This parameter is important for a correct evaluation of your gas consumption in l/min or cu ft /min. Default setting is 12l for metric system and 80 cubic feet in imperial. For the imperial setting it is paramount that you also set the correct operating tank pressure, since the size of the tank is referenced to this pressure.
The third menu, MAX PRESSURE, is where you define the nominal fill pressure of your tanks. This can be set individually for each tank (G1 through G5). This value is used to scale the graphic tank representation but also to define the pressure ranges for color coding (described in section 4.1.1). When the units are set to ft/°F/psi, this value is important because together with the tank volume it allows Quad Ci to correctly evaluate your gas consumption in cu ft/min. Default values are 200bar and 3000psi.
The fourth menu, HALF TANK, is the value at which Quad Ci triggers a half tank warning. This can be set individually for each tank (G1 through G5). This value is also used in the definition of the pressure ranges for color coding as described below. Default values are 100bar and 1500 psi.
The fifth menu, TANK RESERVE, is the value at which an alarm is triggered because you should always be at the surface before reaching this level. Furthermore, this value is used to calculate the TTR value (see section 10.3.5 and 11). This can be set individually for each tank (G1 through G5). Default values are 50bar and 500psi.
4.1.1. COLOR CODING FOR PRESSURE RANGES
In addition to a numeric value for the tank pressure, Quad Ci uses color coding for an immediate at-a-glance tank pressure visualization. The color is applied to the lower screen divider in FULL view. The pressure range from operating tank pressure to empty tank is split into 4 ranges, from BLUE to GREEN to YELLOW to RED. The ranges are so defined:
BLUE: the upper half between MAX PRESSURE and HALF TANK
GREEN: lower half between MAX PRESSURE and HALF TANK
YELLOW: between HALF TANK and 50bar/500psi.
RED: below 50bar / 500psi

QUAD CI Dive Computer

4.2. WATER

· 5. SET COMPUTER

5.6. COMPASS CALIBRATION

You can set the computer to fresh water, salt water or EN13319 calibration, depending on where you intend to dive. Setting the wrong water type entails an error in depth measurement of maximum 3% (i.e. at a depth of 30m/100ft, a computer set to salt water will show 29m/97ft in fresh water whereas a computer set to fresh water will show 31m/103ft in salt water). Note that this does not affect the proper functioning of the computer, since the computer performs all of the calculations based purely on pressure measurements. EN13319 corresponds to a water density of 1.0197kg/l and it is used in European Norm 13319.

Description

SET COMPUTER

LANGUAGE

Allows you to set the language for the user interface, all menus and warning messages during the dive.

UNITS

Allows you to choose between metric (m, °C, bar) and imperial (ft, °F, psi) units.

CLOCK

Allows you to set the time and date.

The digital compass in Quad Ci is calibrated from the factory and does not require, under normal circumstances, any further maintenance. In certain instances, however, such as after exposure to extremely intense magnetic fields, it may be necessary to recalibrate the compass to ensure its accuracy. If you notice an obvious deviation in the indication of the compass, access this menu and perform the calibration as described below.
First you must enter the security code, 1234. Then the image shown below appears on the display.

4.3. BACKLIGHT
This menu allows you to choose between AUTO-OFF (the backlight stays on for only 6 s) or PUSH ON/PUSH OFF (the light stays only until you turn it off manually). This setting applies to the duration of the backlight in dive mode only.
4.4. COMPASS TIME

Allows you to set the BRIGHTNESS maximum brightness of the
backlight.

COMPASS DECLINATION

Allows you to compensate between magnetic north and geographic north in the digital compass.

COMPASS

Allows you to recalibrate the

CALIBRATION compass.

This menu allows you to set the duration of the compass display before it reverts back to the dive data. You can set this value to 15 seconds or PUSH ON/PUSH OFF. If set to PUSH ON/ PUSH OFF, you exit compass mode with BL-SP. This setting applies to dive mode only.
4.5. DEEP STOP
Quad Ci calculates a deep stop for air and nitrox dives only. The depth is defined as that at which the 5th compartment (27-minute half time) switches from ongassing to offgassing. Stopping at this depth during an ascent allows the first four tissues to offgas at a relatively high ambient pressure (theoretically preventing microbubble formation) without causing excessive nitrogen uptake in the other tissues. The deep stop, when calculated, is shown in the top right corner of the display, next to the current depth. The deep stop is optional, not carrying it out does not introduce any penalties and its duration is NOT included in the total ascent time.
This menu allows you turn off the calculation and display of the deep stop. The default setting is OFF.

5.1. LANGUAGE
In this menu you can set the language for the user interface and for alarm messages during the dive.
5.2. UNITS
You can choose between metric (depth in meters, temperature in °C, tank pressure in bar) and imperial (depth in feet, temperature in °F, tank pressure in psi).
5.3. CLOCK
This menu allows you to set the time format, time and date.
5.4. BRIGHTNESS
This menu allows you to change the brightness of the display between the two options HIGH and MAX. MAX is brighter but uses more power. Default setting for DIVE is HIGH. In this menu you can also invert the colors by choosing NIGHT MODE OFF.

Perform repeated revolutions of the device around its own axis while rotating the axis itself.
Visit https://www.mares.com/en/download for a link to a video describing the process.
· 6. LOGBOOK
Quad Ci can record the profiles of over 100 hours of diving, at a sampling rate of 5 seconds. The information can be transferred to a Smartphone (Mares or MySSI app, via bluetooth). In addition, Quad Ci can show most of the information directly on the display. On the main page of the logbook you will see a listing of all dives, including date, time the dive started, depth and dive time. Scroll up and down using TR-SP and BR-SP, then press TR-LP or TL-SP to access the details of the dive. BR-SP scrolls through pages of data and profile and BL-SP or BR-LP goes back one level.

4.6. SURFACING MODE
In this menu you can set the duration of the interval from the moment you reach the surface to when the dive computer closes the dive. During this interval you can submerge again and resume the dive. This menu allows you to change the default 3-minute interval to any value between 1 minute and 45 minutes.

5.5. COMPASS DECLINATION
Depending on the exact location on the planet, there can be a deviation between true North and magnetic North. Any compass will always show magnetic North, so via this menu you can set a value for the so-called declination that will make the compass show true North instead.

· 7. DIVE PLANNER

· PART II

10.2. ALTITUDE

This function allows you to plan your next dive. In case you dived recently, with TR-SP you can enter an additional surface interval in 15-minute increments between now and when you intend to dive: the residual nitrogen load will be adapted accordingly. Quad Ci will consider all active gases and set gradient factors, listed for reference at the bottom of the screen. Then enter the planner with TR-LP or TL-SP; with TR-SP and BR-SP you can scroll through the no decompression limits for all depths, in 3m / 10ft increments, up to the MOD for the gas in use. With TR-LP or TL-SP you can see what would happen if for a given depth you extended your dive time beyond the no decompression limit. Use TR-SP to increase your dive time and see what your corresponding decompression obligation would be. Use BR-LP or BL-SP to return to the no decompression limits. From here BR-LP or BL-SP exits the dive planner.
· 8. INFO
This submenu provides various information about the hardware and software of your Quad Ci.
· 9. BLUETOOTH
This menu starts the bluetooth connection to a smart device via the MARES or MySSI app.

· 10. DIVING WITH QUAD CI
10.1. A FEW WORDS ABOUT NITROX
Nitrox is the term used to describe breathing gases made of oxygen-nitrogen mixes with an oxygen percentage higher than 21% (air). Because Nitrox contains less nitrogen than air, there is less nitrogen loading on the diver’s body at the same depth as compared to breathing air.
However, the increase in oxygen concentration in Nitrox implies an increase in oxygen partial pressure in the breathing mix at the same depth. At higher than atmospheric partial pressures, oxygen can have toxic effects on the human body. These can be lumped into two categories:
– Sudden effects due to oxygen partial pressure over 1.4bar. These are not related to the length of the exposure to high partial pressure oxygen, and can vary in terms of the exact level of partial pressure they happen at. It is commonly accepted that partial pressures up to 1.4bar are tolerable, and several training agencies advocate maximum oxygen partial pressures up to 1.6bar.
– Long exposure effects to oxygen partial pressures over 0.5bar due to repeated and/ or long dives. These can affect the central nervous system, cause damage to lungs or to other vital organs.
Quad Ci warns you with respect to these two effects in the following ways (as long as it is set to either AIR or NITROX):
· Against sudden effects: Quad Ci has an MOD alarm set for a user-defined ppO2max. As you enter the oxygen concentration for the dive, Quad Ci shows you the corresponding MOD for the defined ppO2max. The default value of ppO2max from the factory is 1.4bar. This can be adjusted to your preference between 1.2 and 1.6bar. Please refer to section 2.1 for more information on how to change this setting. If Quad Ci is set to AIR, the ppO2max is set to 1.4bar by default.
· Against long exposure effects: Quad Ci “tracks” the exposure by means of the CNS % (Central Nervous System). At levels of 100% and higher there is risk of long exposure effects, and consequently Quad Ci will activate an alarm when this level of CNS% is reached. Quad Ci also warns you when the CNS level reaches 75%. Note that the CNS% is independent of the value of ppO2max set by the user.

Atmospheric pressure is a function of altitude and of weather conditions. This is an important aspect to consider for diving, because the atmospheric pressure surrounding you has an influence on uptake and subsequent release of nitrogen. Above a certain altitude, the decompression algorithm has to change in order to account for the effect of the change in atmospheric pressure. Quad Ci automatically adapts the algorithm by sensing the ambient pressure every 20 seconds even when it is turned off.
NOTE We do not recommend diving at altitudes above 3700m / 12100ft. If you do, set Quad Ci to BOTTOM TIMER and find appropriate altitude dive tables.
10.3. ALARMS
Quad Ci can alert you of potentially dangerous situations. There are six different alarms: – Ascent rate alarm; – Exceeding a safe ppO2/MOD; – CNS =75%; – Missed decompression stop; – Low tank pressure; – Low battery during the dive.
WARNING
When in bottom timer mode, all warnings and all alarms are OFF aside for the low battery alarm.
NOTE – Alarms are both visual and audible, as
described in detail below. – If you are in any graphic display mode
(compass, dive profile, or tissue graph) when an alarm is triggered, you will be kicked out of that mode and back to the standard numeric display. – Ascent rate alarm has priority over other alarms if they are triggered simultaneously.
10.3.1. ASCENT RATE As soon as depth decreases Quad Ci activates the ascent rate control algorithm and displays the calculated value both numerically and graphically.
WARNING
A rapid ascent increases the risk of decompression sickness.

If Quad Ci determines an ascent rate higher than set limits, the fast ascent alarm is triggered: an audible alarm goes off, the screen dividers start blinking in red and the message SLOW! is displayed on the screen.

QUAD CI Dive Computer

10.3.4. MISSED DECOMPRESSION STOP
WARNING
Violating a mandatory decompression obligation may result in serious injury or death.

The message is displayed until you press any button to acknowledge having seen it, but the depth and the MOD remain in red until the situation has been corrected.
While the alarm is active you can call up the compass or the gas switch table, but the top row will continue showing the depth and MOD in red until the situation has been corrected.

If you ascend above the decompression stop depth by more than 0.3m (1ft), the display switches to FULL, an audible alarm goes off and the message DECO STOP! is displayed. This alarm remains active until you return to the correct depth.

WARNING

This persists until the ascent rate is reduced to below the pertinent limit. The limits are dependent on the current depth as follow:

Depth in m

Speed in Depth in Speed in

m/min

feet

ft/min

50 m

165 ft

30 50 m

100 165 ft

10 30 m

30 100 ft

< 10m

< 30ft

WARNING
If the ascent rate exceeds 120% of the allowed value over a depth change of more than 20m/66ft, Quad Ci locks the computer for 24 hours in order to prevent you from diving again. You can disable this function in the menu ASCENT VIOLATION. This should only be done by highly experienced divers, who take full responsibility for the consequences of this action.

10.3.2. MOD/PPO2
WARNING
– The MOD should not be exceeded. Disregarding the alarm can lead to serious injury or death.
– Exceeding a ppO2 of 1.6bar can lead to sudden convulsions resulting in serious injury or death.
When the diver reaches a depth at which the ppO2 of the inspired gas exceeds the maximum limit entered in the corresponding setting (from 1.2 to 1.6bar), an audible alarm goes off, the depth is shown in red and the message MOD EXCEEDED! is shown.

When the MOD alarm is triggered, ascend immediately until the alarm stops. Failure to do so could result in serious injury or death.
10.3.3. CNS = 75%
WARNING When the CNS reaches 100% there is danger of oxygen toxicity. Quad Ci starts alerting you when you reach 75%.
Oxygen toxicity exposure is tracked on Quad Ci by means of the CNS% based on currently accepted recommendations for exposure limits. This toxicity is expressed as a percentage value which ranges from 0% to 100%. When the value exceeds 75%, Quad Ci switches automatically to the FULL display and the message CNS > 75% is displayed until you hit any button to acknowledge having seen it. For as long as the CNS value stays above 75%, the field which can be selected via the BR-SP button shows the CNS value in red and it becomes the default value. If you push the BR-SP button to view any other value, it will remain for 4s only, and then return to the CNS value.
If the oxygen toxicity level reaches 75%, ascend to shallower depth to decrease oxygen loading and consider terminating the dive.
WARNING Diving with oxygen toxicity at levels of 75% or greater may put you into a potentially hazardous situation, which could result in serious injury or death.

WARNING Never ascend above the displayed decompression stop depth.
10.3.4.1. CEILING-CONTROLLEDDECOOPTION If CEIL-CON DECO is set to ON, the message CEILING! will be triggered as soon as you exceed the CEILING.
10.3.4.2. ALTERNATE GRADIENT FACTORS AND MISSED DECO STOP MODE
If the stop depth is exceeded by less than 1m (3ft) for more than three minutes or by more than 1m (3ft) for more than 1 minute, Quad Ci will automatically switch to the alternate gradient factors, display the messagge MAIN GF > ALT GF, and, if compatible with the current depth, keep you out of a dive violation. The message MAIN GF > ALT GF is displayed until you press any button to acknowledge having seen it.
If the alternate gradient factors are not compatible with the current depth, Quad Ci considers this a dive violation and the display will show DECO VIOLATION!.

battery symbol will appear as a reminder.

In this case, if the diver attempts a repetitive dive after surfacing, Quad Ci will function only as a depth gauge and timer (bottom timer mode), and it will display the message LOCKED BY PREVIOUS DIVE.
10.3.4.2.1.CEILING-CONTROLLED DECO OPTION
If CEIL-CON DECO is set to ON, and you exceed the CEILING by up to 0.3m /1 ft for 1 minute or more, Quad Ci will automatically switch to the alternate gradient factors, display the messagge MAIN GF > ALT GF, and, if compatible with the current depth, keep you out of a dive violation. The message MAIN GF

ALT GF is displayed until you press any button to acknowledge having seen it. If you exceed the CEILING by more than 0.3 m / 1 ft the switch to the alternate gradient factors is instantaneous.
If the alternate gradient factors are not compatible with the current depth, Quad Ci considers this a dive violation and the display will show DECO VIOLATION!.
In this case, if the diver attempts a repetitive dive after surfacing, Quad Ci will function only as a depth gauge and timer (bottom timer mode), and it will display the message LOCKED BY PREVIOUS DIVE.
NOTE The purpose of this is to provide you, when the circumstances allow it, with the means to perform an alternative decompression and to prevent a computer lockdown after surfacing. To perform an alternative decompression, observe the values of GF NOW/GF @SURF and ascend so as to keep both values as close as possible to the original MAIN GF values within the limits of your gas supply.

Additionally, when the tank pressure reaches the value specified under HALF TANK and TANK RESERVE, the message HALF TANK and TANK RESERVE, respectively, is displayed until you hit any button to acknowledge having seen it.

WARNING
When the BATTERY LOW warning appears, you should start your final ascent to the surface.
WARNING
If the battery is completely drained during or right after a dive, Quad Ci will lose the nitrogen loading information in the tissues, and hence it will calculate the next dive wrongly. Do not dive for 24 hours following a dive during or after which the battery was completely drained.
In addition to monitoring the status of its own battery, Quad Ci also monitors the status of the battery in all tank modules paired to it, and alerts you when a battery is low and should be replaced. The message G1 LOW BATTERY (or G2 through G5) is displayed until you hit any button to acknoweldge having seen it. Furthermore the display switches to FULL and the lower right corner shows the tank module battery information in red. If you push BR-SP to view any other value, it will remain for 4s only, and then return to the tank module battery information.

10.3.5. LOW TANK PRESSURE

When during a decompression dive Quad Ci calculates a TTR which is inferior to the total ascent time, the message LOW TANK PRESSURE appears on the display and remains there until you hit any button to acknowledge having seen it. We strongly suggest initiating an ascent when this situation arises, in order to avoid running out of breathing gas during the decompression stop.

10.3.6. LOW BATTERY WARNING

If before a dive the battery power level is 20% or less, the message NO DIVE appears on the display. Quad Ci will not function as a dive computer.

When the battery power level reaches 15%, Quad Ci will show the message LOW BATTERY on the display until you hit any button to acknowledge having seen it. Furthermore a

QUAD CI Dive Computer

· 11. DISPLAY INFORMATION
BR-SP from the home display puts Quad Ci in PRE-DIVE to ensure that monitoring of the dive starts as soon as a depth of 1.2m/4ft is reached. If you start the dive without putting Quad Ci into PRE-DIVE mode, Quad Ci will switch into dive mode automatically but with a delay of up to 20 seconds from immersion.
NOTE – If you remain in PRE-DIVE for longer
than 10 minutes without pressing any button, Quad Ci will return to the home display. – It is recommended to put Quad Ci into PRE-DIVE before submerging. Not doing so can lead to a delay of up to 20s in Quad Ci monitoring the dive.
The PRE-DIVE display shows the active GF values in the top row, the active gases in the middle row and the tank pressure of G1 in the bottom row (if a tank module is paired and connected). From the PRE-DIVE display you have a few options of quick access to settings. With TR-SP you access the ALGORITHM menu, in case you want to change your GF values. With BR-SP you can access the gas settings menu. With Quad Ci you have a choice of how the information is presented on the display. The E-Z display presents the bare minimum of dive information:
– current depth and tank pressure in top row – dive time and no deco time in bottom row
(depth of deepest stop, time at deepest stop and total ascent time in case of decompression dives) – nitrogen bar graph between the top and the bottom row – ascent speed: in case of an ascent, the value in m/min or ft/min is displayed instead of the NO DECO or next to the DECO information, while graphically it is shown in lieu of the horizontal bar graph, in green up to 80% of the allowed limit, in yellow from 80 to 100% and in red beyond that. With TR-SP, the depth is momentarily replaced by the temperature. TR-SP within two seconds and the temperature is replaced by the maximum depth reached so far. After two seconds without button operation, the tank pressure is shown again. With BR-SP the dive time is momentarily replaced by TTR (Time To Reserve). BR-SP within two seconds brings up gas consumption in l/min or cuft/ min, O2%, time of day and battery status. After two seconds without button operation, the dive time is shown again.

NOTE Quad Ci needs approximately 2 minutes to analyze your breathing pattern, thus the TTR is not displayed at the very beginning of the dive.
With BL-SP you can switch to the FULL display, which presents more data fields:
– current depth, temperature in top row – dive time, no deco time in middle row (depth
of deepest stop, time at deepest stop and total ascent time in case of decompression dives) – tank pressure, TTR in bottom row – nitrogen bar graph between the top and the middle row – graphic representation of tank pressure between the middle and the bottom row – ascent speed: in case of an ascent, the value in m/min or ft/min is displayed in the bottom right corner, while graphically it is shown with the upper bar graph in green up to 80% of the allowed limit, in yellow from 80 to 100% of the allowed limit and in red beyond that. With TR-SP the field to the right of the current depth is modified in the following sequence: – max depth – average depth – MOD of gas in use – deep stop if active and calculated – TTS @+5 – ceiling. With BR-SP the field to the right of the tank pressure is modified in the following sequence: – main GF – current gradient factor/gradient factor at the surface if the diver ascends now – O2% (Nitrox only) – CNS (Nitrox only) – ppO2 (Nitrox only) – time of day – stopwatch – battery status of Quad Ci – battery status of tank module in use – gas consumption in l/min or cuft/min – TTR The stopwatch can be reset by TL-SP even when the stopwatch is not displayed. This will also set a bookmark in the dive profile memory.

NOTE if you set Quad Ci to AIR, the information on MOD, CNS and ppO2 are not displayed in order to simplify the display. The CNS value is however calculated in the background and both the CNS alarm and MOD alarm are triggered if the circumstances require it. If you are diving air but would anyway like to see the MOD, CNS and ppO2, set Quad Ci to Nitrox 21%.
If no tank module is paired with G1 Quad Ci changes the layout of the displayed information as follows: – the current depth is centered in the top
row (E-Z); the dive time replaces the tank pressure (FULL); – the lower colored screen divider replicates the behaviour of the upper colored screen divider (FULL); – in the BR-SP sequence TTR and gas consumption do not appear.
11.1. DEEP, DECO AND SAFETY STOPS
DEEP stops are generated as you approach the no deco limit. DEEP stops are NOT mandatory but rather suggestions which attempt to minimize bubble production by offgassing some nitrogen at high ambient pressure. Deep stops are shown to the right of the current depth (FULL only).
DECO stops are generated progressively as you stay at depth beyond the no deco time. DECO stops are MANDATORY As you approach the depth of a stop, the duration of the stop is gradually reduced. The duration itself is always shown in minutes, and is calculated as a function of the pressure gradient achieved at the stop depth itself. Hence the farther you are from the exact depth of the stop, the longer it will take for each minute to tick off. Once there is a mandatory decompression stop, BL-SP from the tissue saturation graph will display the LIST OF STOPS computed by Quad Ci, up to a maximum of 4, starting from the deepest.

decompression will be affected by remaining at the current depth a while longer.

A SAFETY stop is generated as soon as the depth of the dive exceeds 10m / 33ft. It has a duration of 3 minutes and it is carried out between depths of 6m / 20ft and 3m / 10ft at the end of a dive prior to surfacing. Such stop is NOT mandatory but HIGHLY RECOMMENDED. A safety stop is always shown as a 3-minute countdown in minutes and seconds.

It is also very useful because, as the slower tissues start accumulating nitrogen, you could find yourself in a situation in which the decompression time grows very quickly, so much so that you may find yourself with insufficient gas to finish the dive.
NOTE Associated to a large difference between the current TTS and the TTS @+5 value, Quad Ci will alert you with the RUNAWAY DECO warning: since the TTS @+5 calculation runs in the background and is permanently updated, Quad Ci monitors this value and, if it is calculated to be greater than 10 minutes beyond the current TTS, Quad Ci will trigger the alarm RUNAWAY DECO. This remains on the display until you press any button to acknowledge having seen it.

11.1.1. GF @+3 As you approach the surface towards the end of the dive, at a depth shallower than 10 m / 30 ft and if there is no decompression obligation, GF @+3 appears next to GF @SURF in the lower right corner. GF @+3 represents the prediction of GF @SURF 3 minutes ahead. This is a tool that allows you to appreciate the effect of spending time at shallow depth at the end of the dive, especially the effect of carrying out the safety stop and possibly extending it past three minutes.
When the safety stop has elapsed, a check mark appears and a countup timer starts as long as you stay shallower than 6 m / 20 ft.
WARNING
During all dives, perform a safety stop between 3 and 5 meters/10 and 15 feet for 3 minutes, even if no decompression stop is required.
11.2. FUTURE DECOMPRESSION
In case of a decompression dive, the TR-SP sequence also features TTS @+5. The value shown represents the total ascent time if you were to remain at the current depth for an additional 5 minutes. This is very useful since it allows you to estimate how your

NOTE The prediction of TTS can be set between 3 and 10 minutes in advance via the TTS @+X menu within FUTURE DECO in SET DIVE. The value of X can be set between 3 and 10 minutes.
Likewise, the trigger point of the RUNAWAY DECO alarm can be set between 2 and 4 times the value of X. As an example, if you set the prediction of TTS to a value of +6 and the RUNAWAY DECO to a value of 3, the alarm will be triggered when the difference between the current TTS and the predicted one 6 minutes later is 6*3=18 minutes or greater.
11.3. DIVE PROFILE
During the dive you can view the depth profile performed so far by pressing BL-SP from the FULL display. This is a static image and it automatically reverts to the E-Z display within 5 seconds unless you press BL-SP to access the TISSUE SATURATION GRAPH.

11.4. TISSUE SATURATION GRAPH
With BL-SP from the profile view a complete description of the current tissue saturation fills the space underneath the top row. It remains on the display for a maximum of 5 seconds before reverting to the E-Z dive display. BL-SP within 5 seconds brings up the LIST OF STOPS.
The graph shows the tissue tension in each of the 16 compartments simulated by the algorithm. The vertical axis represents pressure. For air and nitrox dives, on the graph there is also a horizontal yellow line: this represents, on the same pressure scale, the partial pressure of nitrogen in the inhaled gas. The distance between the line and top of a bar represents the pressure difference driving gas in or out of a tissue and is thus indicative of the speed of on or offgassing. As long as the line is above the bar, the tissue in question is taking on gas and the bar is depicted in yellow. Once the line descends into the bar, the tissue in question is offgassing and the bar becomes blue.
11.5. COMPASS
During the dive you can access the compass by pressing BL-LP.
The compass will remain on the screen for the duration defined in COMPASS TIME or until an alarm is triggered. With TR-SP you can set a reference bearing. A red triangle will appear to indicate the set bearing. Additional symbols will appear as well: squares at 90 degrees, triangles at 120 degrees and two parallel lines at 180

QUAD CI Dive Computer

degrees, as an aid in navigation for square, triangular and reciprocal courses. The number at the bottom represents the deviation of the direction you are pointing at with reference to the set bearing. With TR-SP a new bearing will override the one in memory. With TR-LP you erase the bearing. TL- SP resets the stopwatch.

11.7. UNDERWATER MENU
With TL-LP you can call up a menu which allows you to change certain settings during the dive. These are described in detail in sections 2, 3 and 4.

The post dive screen shows the following information:

11.6. ALTERNATE GRADIENT FACTORS

To switch from the main gradient factors to alternate gradient factors, press BR-SP until MAIN GF appears on the display. Now with BR-LP the center row will show both decompression calculations, that for MAIN GF on top and that for ALT GF underneath it. The two decompression calculations will remain on the display for 10 seconds after which the display will revert to normal unless you do one of the following:
– press or press and hold either left button or the bottom right button (labelled MAIN), in which case you immediately revert to the normal display
– press or press and hold the top right button (labelled ALT) in which case the alternate gradient factors are activated, the display returns to normal, the decompression calculation shown in the center row is that pertaining to the alternate gradient factors, and ALT GF and its values replace MAIN GF and its values in the bottom right corner data field.

BOOKMARK – allows you to set a bookmark which you can later review in the downloaded dive profile DIVE – as described in 2.2.3 FUTURE DECO – as described in 2.6 MAX DEPTH – as described in 3.2.1 DIVE TIME – as described in 3.2.2 BACKLIGHT – as described in 4.3 TANK VOLUME – as described in 4.1 MAX PRESSURE – as described in 4.1 HALF TANK – as described in 4.1 TANK RESERVE – as described in 4.1 WATER – as described in 4.2 COMPASS TIME – as described in 4.4
· 12. AFTER THE DIVE
Upon returning to the surface, Quad Ci first goes into the so-called surfacing mode. This mode allows you to resume your dive after a brief period of orientation. The screen shows the surfacing mode countdown timer, dive time, and tank pressure.

NOTE – The two decompression calculations
can be called up as often as you wish before making a switch to the alternate gradient factors.
– The switch to alternate gradient factors can be made only once.
– Once the alternate gradient factors are active, it is not possible to return to the MAIN GF or see the two decompression calculations together on the display.

– The remaining desaturation time (DESAT): this is calculated by the decompression model in the computer. Any dive started while there is remaining desaturation on your computer is considered a repetitive dive, meaning that Quad Ci accounts for the pre-existing nitrogen load in your body.
– The no-fly time: this is the time during which an exposure to the reduced pressure inside the cabin of an airplane could cause decompression sickness. Quad Ci employs, as recommended by NOAA, DAN and other agencies, a standard 12-hour (no-deco non-repetitive dives) or 24-hour (deco and repetitive dives) countdown.
The DESAT TIME could be shorter than the NO-FLY TIME, which would imply that you cannot fly although you are desaturated. This is simply the consequence of the desaturation time being calculated by the algorithm based on the actual dive profile, while the no-fly time is an accepted standard in the diving industry. Since the real effect of flying after diving has never been fully investigated, this approach fits with our philosophy.
WARNING
Flying while Quad Ci displays NO-FLY can result in serious injury or death.
– The surface interval (S. I.): this is displayed from the moment the dive is closed for as long as there is remaining desaturation or no-fly time on the computer.
– CNS: this allows you to track how the CNS load from the previous dive is gradually reduced during the surface interval.
– GF NOW: this helps you track your inert gas in excess of ambient pressure.
The screen also shows the main data of the last dive: max depth, temperature and dive time.
The POST DIVE display is part of the BL-SP loop.
From POST DIVE you have quick access to the LOGBOOK (TR-SP), to the PLANNER (BR-SP) and to BLUETOOTH (BR-LP).

If you submerge again before the countdown is over, the dive time will resume from where it left off, including the time spent on the surface. If you do not submerge before the end of the countdown, Quad Ci considers the dive finished, records the data to the logbook and reverts to the so-called POST DIVE mode.
22

· 13. DIVING WITH MORE THAN ONE GAS MIXTURE
WARNING
– Diving with more than one gas mixture represents a much higher risk than diving with a single gas mixture, and mistakes by the diver may lead to serious injury or death.
– During dives with more than one gas mixture, always make sure you are breathing from the tank that you intend to breathe from. Breathing from a high oxygen concentration mix at the wrong depth can kill you instantly.
– Mark all your regulators and tanks so that you cannot confuse them under any circumstance.
– Before each dive and after changing a tank, ensure that each gas mixture is set to the correct value for the corresponding tank.
Quad Ci enables you to use up to three gas mixtures during the dive (air and Nitrox only). The three mixtures are labeled G1, G2 and G3 and must be in ascending order of oxygen content, i.e. G1 has the lowest oxygen concentration, G2 an intermediate value, and G3 has the highest oxygen concentration of the three. Two or more tanks can also be set to the same oxygen concentration. If you are diving with only two mixtures, you will be utilizing tanks G1 and G2.
Quad Ci can be set to consider all active gases in the decompression calculation, or it can be set to consider only the gas currently in use. In the first case (PREDICTIVE = ON in 2.4.1), when you switch gas when prompted to do so during an ascent, you will not see a change in the decompression calculation: Quad Ci considered that you were going to switch gas and already considered the effect of this on the decompression. In the second case (PREDICTIVE = OFF in 2.4.1) you will see a reduction in the total ascent time as you switch to a gas with higher oxygen content and Quad Ci considers this for the decompression calculation.
Quad Ci can show the tank pressure of each tank if the corresponding first stage regulator is equipped with a Mares tank module, paired as described in section 1.9. Note that Quad Ci can be programmed and used for diving with more than one gas mixture whether you use tank modules for each or not.
NOTE Gases with a paired transmitter associated with them will use the dive display with tank pressure (Section 1.9.1, Figures C and D). Gases without a paired transmitter associated with them will use the dive display without tank pressure (Section 1.9.1, Figures A and B). For each gas you can temporarily DISABLE the transmitter in the PAIRING menu with TL-LP (Section 1.9.1, Fig. E).
NOTE You can set all the gases to the same oxygen percentage.

13.1. SETTING MORE THAN ONE GAS
The characteristics of the gases must be entered in the computer before the dive. It will then be your responsibility to tell Quad Ci which gas is currently being used during the various phases of the dive.
NOTE – If you dive using just one gas, select G1
and deselect the other two. – For dives with two gases, select G1 and
G2 and deselect the third. – When enabling G2 and G3, you must first
define G2 and then G3. – You cannot activate G3 without first
having activated G2. – G2 cannot have an oxygen percentage
higher than G3. – If you set G2 to OFF, G3 will
automatically be set to OFF also. – The MOD for G2 and G3 is the switch
depth for the corresponding gas. This is what Quad Ci uses for its calculation, alarms and suggested switch points. – Setting a tank to OFF does not affect the pairing of the corresponding tank module.
To use multiple gases, you will need to enable the gases and set the oxygen percentage and the ppO2max for each one, as described below. Keep in mind that the MOD for G2 and G3 is the depth at which Quad Ci will prompt you to perform the gas switch (see section 13.2 below).
NOTE – When setting an oxygen concentration of
80% or higher, Quad Ci automatically sets the ppO2max to 1.6 bar. – For gases with oxygen concentration 80% or higher, the ppO2 can be set between 1.6 bar and 1.8 bar.
WARNING A ppO2 higher than 1.6 bar is dangerous and can result in injury or death.
NOTE Display changes with respect to single gas dives: – When more than one gas is set, the label
G1 (or G2 or G3) appears together with the O2% label. – BR-SP from PRE-DIVE brings up the gas summary table, from which you can see the pressure of all active transmitters and also edit each gas individually.

13.2. SWITCHING GAS
Quad Ci always begins the dive with G1, which has the lowest percentage of oxygen. When during the ascent you reach the depth corresponding to the MOD of G2, Quad Ci sounds an audible signal and displays the message SWITCH TO G2. With TR-SP or BR-SP you perform the switch, at which point Quad Ci shortly displays the message GAS SWITCH OK; with TL-SP or BL-SP you stay on the current gas, at which point Quad Ci shortly displays the message GAS NOT SWITCHED. If you don’t perform any action within 30 seconds, Quad Ci shows GAS NOT SWITCHED and returns to the normal display. If set to PREDICTIVE = ON and the gas was not switched, Quad Ci will show the message EXCLUDING G2 prior to changing the decompression calculation to reflect the exclusion of G2.
If you drop again below the MOD for G2, Quad Ci will show the message INCLUDING G2 AGAIN and changes the decompression calculation accordingly.
NOTE The same process is repeated when you approach the MOD for G3 with the message SWITCH TO G3
You can always perform a manual switch with BR-LP. This will make the gas summary table appear, which shows all active gases.
NOTE You can reach this screen at any time during the dive, for instance to check on the planned switch point of G2 and G3.
NOTE The table will show tank pressure for a paired and active transmitter, — for a paired but not active (or out of reach) transmitter, OFF for a paired but DISABLED transmitter and NP (NOT PAIRED) for a gas without a paired transmitter.

QUAD CI Dive Computer

WARNING
Diving with trimix requires extensive dedicated training. This manual does not provide such training!
Failure to acquire appropriate training prior to diving with trimix is very likely to result in injury or death!

In case of a violation, Quad Ci will restrict the use for 24 hours, and will only allow operation in Bottom Timer mode, continuously displaying the message LOCKED BY PREVIOUS DIVE.
· 15. TAKING CARE OF QUAD CI

15.1. TECHNICAL INFORMATION

Scroll through the available gases with TR-SP and BR-SP, then with TR-LP or BR-LP you activate it. With BL-SP you can exit without making changes. The decompression calculation will reflect the switch in breathing gas.
13.3. SPECIAL SITUATIONS
13.3.1. SWITCHING BACK TO A GAS MIXTURE WITH LOWER OXYGEN CONCENTRATION
There may be situations in which you have to switch back to a gas with lower oxygen concentration than what you are currently breathing. This can happen for instance if you want to descend deeper than the MOD for the current gas, or if for instance you have run out of gas in G3 during the decompression. To do so, call up the gas switch screen with BR-LP. Choose another gas with TR-SP or BR-SP, then with either TR-LP or BR-LP you activate it. The decompression calculation will reflect the switch in breathing gas.
13.3.2. SUBMERGING BELOW THE MOD AFTER A GAS SWITCH
If after having switched to a gas mixture with a higher oxygen concentration you inadvertently drop again below the MOD for that mixture, the MOD alarm will immediately go off. Either switch back to a gas mixture suited for that depth, or ascend above the MOD for the gas mixture you are breathing from.
13.3.3. LOGBOOK FOR DIVES WITH MORE THAN ONE GAS MIXTURE
For dives carried out with more than one gas mixture, Quad Ci adds information on oxygen concentration, initial, final and differential pressure for all gases used.
13.4. DIVING WITH MORE THAN ONE GAS MIXTURE – TRIMIX OR HELIOX
Quad Ci allows you to set up to 5 gases in which in addition to the oxygen percentage you can also set the helium percentage. In the tissue saturation graph you will see bars for the nitrogen partial pressure and for the helium partial pressure. Everything is the same as with multigas nitrox diving with the addition of OTUs (Oxygen Toxicity Units) in the sequence of data fields in the bottom right corner.

· 14. BOTTOM TIMER MODE
When Quad Ci is set to BOTTOM TIMER mode, it will only monitor depth, time, and temperature, and will not carry out any decompression calculation. You can only switch to bottom timer mode if the computer is completely desaturated. Alarms are limited to ascent rate, low battery and, if set by the user, max depth and dive time.
WARNING Dives in bottom timer mode are performed at your own risk. After a dive in bottom timer mode you must wait at least 24 hours before diving using a decompression computer.
During a dive in bottom timer mode, the following information is displayed:
– current depth – average depth – dive time – temperature – in case of an ascent: ascent speed (in m/min
or ft/min). With TR-SP and BR-SP you can change the values in the center left and right field respectively, choosing among: – max depth – avg depth – temperature – stopwatch – time of day – battery status The stopwatch is reset by means of TL-SP. The average depth is reset by means of BR-LP.
14.1. DIVE VIOLATION INDUCED BOTTOM TIMER MODE
The following violations can occur during an Air, Nitrox or Trimix dive: – Ascent violation. – Missed deco stop violation.

Operating altitude: – with decompression sea level to
approximately 3700m/12100ft
– without decompression (gauge mode) at any altitude
Decompression model: Bühlmann ZH-L16C with gradient factors (16 tissues)
Depth measurement: – Max displayed depth: 150m/492ft
– Resolution: 0.1m until 99.9m and 1m at depth deeper than 100m. Resolution in ft is always 1ft
– Temperature compensation of the measurement between -10 °C to +50 °C / 14 °F to 122 °F
– Accuracy from 0 to 80m/262ft: 1% ±0.2m/1ft
Temperature measurement: – Measurement range: -10 °C to +50 °C /
14 °F to 122 °F
– Resolution: 1 °C / 1 °F
– Accuracy: ± 2 °C / ± 4 °F
Digital compass: – resolution: 1°
– accuracy: ± 1° + 5% of tilt angle (example: at 50° tilt, accuracy is ±3.5°)
– tilt angle: up to 80°
– refresh rate: 1s
Clock: quartz clock, time, date, dive time display up to 999 minutes
Oxygen concentration: adjustable between 21% and 99%, ppO2max range between 1.2 and 1.6bar up to 79% O2, then 1.6 – 1.8 bar. Logbook memory: over 200 hours of dive profile at 5-second sampling rate
Operating temperature: -10 °C to +50 °C / 14 °F to 122 °F
Storage temperature: -20 to 70 °C / -4 to 158 °F
Display: – Diagonal: 2.7″
– Technology: MIP
– Resolution: 400 x 240
– Colors: 8
– Mineral Glass
Power supply: · Quad Ci:
– lithium-ion rechargeable battery, with battery charge indicator
– operating temperature:
· discharging: from -10 to +50 °C / 14 to 122 °F
· charging: from 0 to 45 °C / 32 to 113 °F

– battery duration from one charge: approx 20 hours of diving (30 hours without transmitter). Actual battery duration depends on the usage of the high intensity backlight and the water temperature
– lifetime of the battery: approx 500 charging cycles
Bluetooth:
EU
This device is in compliance with the essential requirements and other relevant provisions of RED Directive (2014/53/EU).
FCC Warnings
– Model: Quad Ci FCC ID: 2AIKSQuadCi
– 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.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment and receiver.
– Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
– Consult the dealer or an experienced radio/ TV technician for help.
– Responsible party’s contact located in the United States: Head USA – dba as Mares Diving a division of Head USA, Congress Corporate Plaza II 902 Clint Moore Road Suite 208, 33487 Boca Raton, Florida. www.mares.com
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

To avoid possible problems with your Quad Ci, the following recommendations will help assure years of trouble free service: – avoid dropping or jarring your Quad Ci; – do not expose Quad Ci to intense, direct
sunlight; – do not store Quad Ci in a sealed container,
always ensure free ventilation.
NOTE If you notice signs of moisture on the inner wall of the glass, take your Quad Ci immediately to an authorized Mares service center.
WARNING
The Mineral Glass is not exempt from scratches resulting from improper use.
WARNING
Do not blow compressed air onto Quad Ci, because it could damage the pressure sensor area.
15.2.1. REPLACING THE BATTERY IN QUAD CI The Quad Ci computer uses a rechargeable battery. It may last up to 500 charging cycles. The battery can only be replaced by a Mares battery center. Mares declines all responsibility for any damage caused by replacing the battery.
NOTE Dispose of the old battery properly. Mares adopts a policy of respect for the environment, and urges use of the appropriate separated waste collection services.

· 16. WARRANTY
Mares products are guaranteed for a period of two years subject to the following limitations and conditions: The warranty is non-transferable and applies strictly to the original purchaser. Mares products are warranted free from defects in materials and workmanship: components that, upon technical inspection, are found to be defective, will be replaced free of charge. Mares S.p.A. declines all responsibility for accidents of any kind that result from tampering or incorrect use of its products. Any products returned for overhaul or repairs under warranty, or for any other reason, must be forwarded exclusively via the vendor and accompanied with a proof of purchase slip. Products travel at the risk of the sender.
16.1. WARRANTY EXCLUSIONS
Damage caused by water seepage resulting from improper use (e.g. dirty seal, battery compartment closed incorrectly, etc.). Rupture or scratching of the case, glass or strap as a result of violent impact or blows. Damage resulting from excessive exposure to elevated or low temperatures. Damage caused by the use of compressed air to clean the dive computer.
16.2. HOW TO FIND THE PRODUCT SERIAL NUMBER AND ELECTRONIC ID
The serial number is laser-engraved on the back side of Quad Ci, in front of the front attachment point of the strap. To see the electronic ID, enter the INFO menu. Both serial number and electronic ID can be found on the warranty card inside the box and also on the label outside the box.
· 17. DISPOSAL OF THE DEVICE
Dispose of this device as electronic waste. Do not throw it away with regular rubbish. If you prefer, you can return the device to your local Mares dealer.

15.2. MAINTENANCE
The tank pressure gauge and the parts of this product used to measure tank pressure should be serviced by an authorized Mares dealer every other year or after 200 dives (whichever comes first). In addition, the depth accuracy should be verified every two years. Aside from that, Quad Ci is virtually maintenance free. All you need to do is rinse it carefully with fresh water after each dive (avoid any chemical products) and charge the battery when needed.

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Mares S.p.A. – Salita Bonsen, 4 – 16035 RAPALLO – ITALY – Tel. +39 01852011 – Fax +39 0185201470 www.mares.com
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mares 414148-BKSI Color Dive Computer Instruction Manual

414148-BKSI Color Dive Computer

Product Information

Specifications:

Product Usage Instructions

Part I – Getting Started

Part II – Advanced Features

Frequently Asked Questions (FAQ)

Q: Can the dive computer be used for technical diving with

Q: How can I calibrate the compass on the dive computer?

References

Read User Manual Online (PDF format)

Download This Manual (PDF format)

mares User Manuals

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