Color Dive Computer Instruction Manual (FW 1.01.
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.
• TABLE OF CONTENTS IMPORTANT WARNINGS 4 PART I • 1. INTRODUCTION 5 5 DISCLAIMER 1.1. 1.2. 1.3. 1.4. 1.5. 1.6. • 2. SET DIVE 2.1. 2.2. 2.6. 2.7. 2.8. 2.9. 2.10. 2.11. 2.12. 2.13. 2.14. 2.15. 2.16. MODE ALGORITHM 2.2.1. MAIN GF 2.2.2. PERSONALIZATION 2.2.3. REPETITIVE DIVES 2.2.4. MULTIDAY GAS INTEGRATION 2.3.1. COLOR CODING FOR PRESSURE RANGES WARNINGS 2.4.1. MAX DEPTH 2.4.2. DIVE TIME 2.4.3. NO DECO 2.4.4. ENTERING DECO MULTIGAS 2.5.1. PREDICTIVE 2.5.2.
SIRIUS 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.
• PART I • 1. INTRODUCTION 1.1. GLOSSARY AIR: Air dive AVG: Average depth, calculated from the beginning of the dive. CNS: Central Nervous System. CNS% is used to quantify toxic effects of oxygen. D-TIME: 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.
SIRIUS Dive Computer 1.2. OPERATING MODES The functions of the Sirius computer can be grouped into two categories, each corresponding to a specific mode of operation: • watch mode: Sirius is dry on the surface. In this mode you can use it as a normal watch.
isn’t. The 4 more recent lap times are kept on the display (Fig. 4). BL-SP exits the stopwatch. 1.5.4. COUNTDOWN TIMER TL-LP from any TOD display brings up the COUNTDOWN TIMER (Fig. 5). TR-LP allows you to set the duration. TR-SP starts and stops the timer, BR-SP resets it (also while running). BL-LP allows you to activate the automatic repetition of the timer upon reaching 0. BL-SP exits and returns to TOD display. 1.5.5.
SIRIUS Dive Computer 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.
more information about diving with more than one gas or for dives with trimix. With BR-SP from PRE-DIVE you have direct access to the last used gas setting menu. 2.2. ALGORITHM Sirius 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.
SIRIUS Dive Computer to the MOD alarm (section 8.3.2) is triggered, albeit with the message MAX DEPTH REACHED. 2.8. DEEP STOP 2.4.2. DIVE TIME Sirius 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.
2.16. COMPASS TIME 3.5. 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 5 seconds, 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. Depending on the exact location on the planet, there can be a deviation between true North and magnetic North.
SIRIUS Dive Computer the CNS% is independent of the value of ppO2max set by the user. 8.2. ALTITUDE 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.
8.3.4.2.1. 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, Sirius will automatically switch to the EMERGENCY gradient factors (95/95), display the messagge MAIN GF > GF 95/95 (Fig. 18), and, if compatible with the current depth, keep you out of a dive violation. The message MAIN GF > GF 95/95 is displayed until you press any button to acknowledge having seen it. If you exceed the CEILING by more than 0.
SIRIUS Dive Computer - 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 - battery status of Sirius - battery status of tank module in use - gas consumption in l/min or cuft/min NOTE if you set Sirius to AIR, the information on MOD, CNS and ppO2 are not displayed in order to simplify the display.
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.
SIRIUS Dive Computer be set to consider only the gas currently in use. In the first case (PREDICTIVE = ON in 2.5.1), when you switch gas when prompted to do so during an ascent, you will not see a change in the decompression calculation: Sirius 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 2.5.
- avg depth - Diagonal: 2.7” - temperature - Technology: TFT - stopwatch - Resolution: QVGA 320*240 - time of day - Colors: 256000 - battery status - Brightness 420cd/m² The stopwatch is reset by means of TL-SP. The average depth is reset by means of BR-LP. 12.1. DIVE VIOLATION INDUCED BOTTOM TIMER MODE The following violations can occur during an Air, Nitrox or Trimix dive: - Ascent violation. - Missed deco stop violation.
SIRIUS Dive Computer ⚠ WARNING The mineral glass is not exempt from scratches resulting from improper use. ⚠ WARNING Do not blow compressed air onto Sirius, because it could damage the pressure sensor area. 13.2.1. REPLACING THE BATTERY IN SIRIUS Sirius uses a rechargeable battery, and it may be necessary to replace it after approximately 500 charging cycles. The battery should only be replaced in a center authorized by Mares.
SIRIUS Dive Computer • FIGURE Fig. 1 Fig. 7 Fig. 2 Fig. 4 Fig. 8 HP HP HP HP 15 / 10 cm Fig. 9 HP HP Fig. 5 Fig. 10 Fig. 6 Fig. 11 HP Fig.
• FIGURE Fig. 12 Fig. 17 Fig. 22 Fig. 13 Fig. 18 Fig. 23 Fig. 14 Fig. 19 Fig. 24 Fig. 15 Fig. 20 Fig. 25 Fig. 16 Fig. 21 Fig.
SIRIUS Dive Computer • FIGURE 22 Fig. 27 Fig. 32 Fig. 37 Fig. 28 Fig. 33 Fig. 38 Fig. 29 Fig. 34 Fig. 39 Fig. 30 Fig. 35 Fig. 40 Fig. 31 Fig.
code 44201627 - FW 1.01 - 03/22 - Artbook.net 18637/22 Mares S.p.A. - Salita Bonsen, 4 - 16035 RAPALLO - ITALY - Tel. +39 01852011 - Fax +39 0185201470 www.mares.com 2016/425: www.mares.
