Oceanic GEO 4.0 Operating Manual

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GEO 4.0 OPERATING MANUAL

GEO 4.0

DIVE COMPUTER

OPERATING MANUAL

Doc. No. 12-5670-r01 (2/27/18)

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Summary of Contents for Oceanic GEO 4.0

Page 2: Table Of Contents
GEO 4.0 OPERATING MANUAL CONTENTS NOTICES SET UTILITIES 1. H2O ACTIVATION 2. UNITS (IMP/MET) GETTING STARTED 3. DEEP STOP BASICS 4. SAFETY STOP ACTIVATION 5. ALGORITHM STANDBY (POWER SAVING) MODE 6. CONSERVATIVE FACTOR BUTTONS 7. BLUETOOTH (BLUETOOTH COMMUNICATION) 8. GLO (BACKLIGHT) DURATION WATCH MODE 9.
Page 3 GEO 4.0 OPERATING MANUAL ALT 1 ALT 2 COUNTDOWN TIMER (CDT) SET ALARMS SET MODE (OPERATION MODE) INITIATING A DIVE 1. ELAPSED DIVE TIME ALARM 2. DEPTH ALARMS 1-3 FREE DIVE MAIN FREE DIVE ALT 1 FREE DIVE ALT 2...
Page 4: Notices
DECOMPRESSION MODEL The programs within the Geo 4.0 simulate the absorption of nitrogen into the body by using a mathematical model. This model is merely a way to apply a limited set of data to a large range of experiences. The Geo 4.0 dive computer model is based upon the latest research and experiments in decompression theory.
Page 5 GEO 4.0 OPERATING MANUAL Welcome OCEANIC THANK YOU for choosing the Geo 4.0 © Pelagic, 2019 Doc. No. 12-5670-r01 (2/27/18)
Page 7: Basics
Welcome to your new Geo 4.0. The Geo 4.0 is an easy to use dive computer utilizing a four button interface. Divers may choose between four modes of functionality consisting of Watch, Dive, Gauge, and Free Mode. Though the Geo 4.0 is easy to use, you will get the most out of your new Geo 4.0 if you take some time to familiarize yourself with its displays and operation.
Page 8 GEO 4.0 OPERATING MANUAL DISPLAY ICONS Tissue Loading Bar Graph Descend, Ascend, or Stop Conservative Factor Dive Time or # Daily Alarm Set Fraction of Oxygen Nitrox Low Battery Time ID Gas # Logbook Value is Max Depth Surface Bluetooth on...
Page 9: Buttons
GEO 4.0 OPERATING MANUAL BUTTONS The Geo 4.0 utilizes 4 control buttons called the MODE, SELECT, ADV. (Advance) and, LIGHT buttons. They allow you to select mode options and access specific information. They are also used to enter settings, activate the backlight, and acknowledge the audible alarm.
Page 10 GEO 4.0 OPERATING MANUAL BUTTON FUNCTIONS ACTION FUNCTION • to move backward through the Main Menu • to decrease a setting • to select/save an option or setting • to access Alt screens • to advance through selections • to toggle or change setpoints •...
Page 11 GEO 4.0 OPERATING MANUAL ACTION BUTTON FUNCTION • to scroll or increase a setting value at a faster rate • to reset chronograph (Watch Mode) © Pelagic, 2019 Doc. No. 12-5670-r01 (2/27/18)
Page 13: Watch Main Screen
WATCH MAIN SCREEN The Watch Main screen is the default screen of the Geo 4.0. The Geo 4.0 allows you to choose between displaying one or two time zones. This is useful when wearing the Geo 4.0 as your primary timepiece while travelling.
Page 14: Show Dual Time
GEO 4.0 OPERATING MANUAL SHOW DUAL TIME This setting allows you to choose whether or not to show dual time zones, both HOME and AWAY, on the Watch Main screen. If you select yes, the secondary time reading will display at the top on the Watch Main screen.
Page 15: Chronograph
GEO 4.0 OPERATING MANUAL CHRONOGRAPH The chronograph has a 9 lap memory. After 9, subsequent laps will be recorded and the earliest lap discarded. If the Chrono continues to run and reaches 9:59:59.99, it will stop and record that as a Lap. Subsequent presses of SELECT then have no effect.
Page 16: Daily Alarm
GEO 4.0 OPERATING MANUAL DAILY ALARM When set ON, the Daily Alarm, that runs in the background, will sound the audible alarm at the time set every day when that time equals the Watch Default Time selected. The Audible will not sound while operating in dive computer modes. Operation reverts back to Watch Main after selection of ON or OFF options.
Page 17: Hour Format
GEO 4.0 OPERATING MANUAL 2. HOUR FORMAT Choose your preferred hour format. to select toggle setting 12 or 24 3. DEFAULT TIME This setting allows you to choose the time HOME or AWAY that displays as the default on the Watch Main.
Page 18: Date
GEO 4.0 OPERATING MANUAL 6. DATE Set the year, month, and day in order. The corresponding digit will flash, allowing it to be set. decrease to save value year, month; increase value © Pelagic, 2019 Doc. No. 12-5670-r01 (2/27/18)
Page 20: Dtr (Dive Time Remaining)
DTR (DIVE TIME REMAINING) The Geo 4.0 constantly monitors No Decompression status and O2 Accumulation, and will display whichever time is the least amount available as DTR on the No Decompression Dive Main screen. The Time being displayed will be identified by the NDC min (no decompression time) or O2 min icons.
Page 21: Vari Bar Graph
(915 m) higher than the actual altitude at activation. Refer to the charts in the back of this manual for dive times. DEEP STOP When the DS (Deep Stop) selection is set ON, it will trigger after descending deeper than 80 ft (24 m). The Geo 4.0 then calculates (continually updating) a Stop Depth equal to ½ the Max Depth.
Page 22: Safety Stop
LOW BATTERY WHILE ON THE SURFACE WARNING: DO NOT dive with a low battery. Warning Level • The Geo 4.0 functions continue but the backlight is disabled. • The Battery icon appears solid. Alarm Level • If in Dive Computer mode, the battery icon flashes for 5 seconds and operation reverts to Watch Time with the icon flashing until the Battery is changed or voltage cannot sustain operation.
Page 23: Audible/Visual Alarm
GEO 4.0 OPERATING MANUAL AUDIBLE/VISUAL ALARM While operating in Dive or Gauge Mode, the audible alarm will emit 1 beep per second for 10 seconds when alarms strike, unless it is set to Off. During that time, the audible alarm can be acknowledged and silenced by pressing the SELECT button.
Page 25: On The Surface Before A Dive
The Geo 4 shall enter Standby mode 10 minutes after Norm Surface Mode has been activated (or 10 minutes after the post dive transition period has ended) and no button presses or dives have been initiated. Pressing a button will wake the Geo 4.0 up from Standby Mode.
Page 26: Fly/Desat
GEO 4.0 OPERATING MANUAL ALT 2 The ALT 2 screen displays temperature and current elevation readings. elevation temperature (EL2 - EL7, blank if sea level) ALT 3 The ALT 3 screen displays only after a nitrox dive. It displays the current oxygen saturation level, PO2 Alarm setting, and the current gas mix.
Page 27: Log
GEO 4.0 OPERATING MANUAL The log stores Information from the latest 24 Dive and/or Gauge mode dives for viewing. • If no dives are recorded, the message NONE YET will be displayed. • After exceeding 24 dives, the most recent dive is stored while the oldest is deleted.
Page 28: Set F (Gas Mix)
GEO 4.0 OPERATING MANUAL SET F (GAS MIX) Within this submenu you can change the two available gas mixes from air to any nitrox mix between 21 - 100 FO2 (% O2), PO2 Alarm settings, and whether to use 1 or 2 gases. Nitrox mixes are displayed with their corresponding MOD (Maximum Operating Depth) and the current PO2 Alarm setting for the selected gas.
Page 29: Set Alarms
GEO 4.0 OPERATING MANUAL SET ALARMS Within this submenu you can customize the following seven alarm settings. Within this menu you can customize the following five alarm settings. SET ALARMS LEAD-IN to Set Audible Alarm 1. AUDIBLE ALARM The Audible Alarm feature allows you to set audible alarms ON or OFF.
Page 30: Tlbg (Tissue Loading Bar Graph) Alarm
GEO 4.0 OPERATING MANUAL 4. TLBG (TISSUE LOADING BAR GRAPH) ALARM This feature allows you to set an alarm to go off at a predetermined number of TLBG segments. SET TLBG ALARM TLBG ALARM TRIGGERED decrease to select segments flashing...
Page 31: H2O Activation
GEO 4.0 OPERATING MANUAL 1. H2O ACTIVATION The H2O Activation feature allows you to turn OFF water contact activation. WARNING: With H2O Activation turned OFF, you must remember to manually activate the Dive Mode before any dive. SET H2O ACTIVATION...
Page 32: Safety Stop
GEO 4.0 OPERATING MANUAL 4. SAFETY STOP The Safety Stop feature can be set ON, OFF, or TMR (timer). If ON is selected, you may choose from an available 3 or 5 min Safety Stop at depths of 10, 15, or 20 ft (3, 4, 5, or 6 m). If TMR (timer) is selected, a manual timer will be available instead of the automatic Safety Stop count down.
Page 33: Conservative Factor
Bluetooth is initiating. When Bluetooth is turned on it will operate in sniffing mode (search- ing for compatible devices) while on the surface and the Geo 4.0 is not in Standby Mode. Communication with your Geo 4.0 must be initiated with your mobile device using Diverlog+ software.
Page 34: Sampling Rate
9. SAMPLING RATE The Sample Rate controls how frequently the Geo 4.0 stores a data snapshot for Diverlog + Download during a dive. Set- ting options are 2, 15, 30, or 60 second intervals. Shorter intervals will provide a more precise record of your dives.
Page 35: Sn (Serial Number)
Geo 4.0 requires factory service. The Geo 4.0 is configured with hidden feature that clears nitrogen and oxygen calculations. This is intended for facilities using the Geo 4.0 for rental or training activities, not for general use by individual divers. The feature is hidden to prevent accidental use. If you enter the Clear Data screen by accident, you may exit without change by holding the SEL button for 2 seconds.
Page 37: Initiating A Dive
GEO 4.0 OPERATING MANUAL INITIATING A DIVE With the Geo 4.0 in Dive mode, a dive will commence upon descending to 5 ft (1.5 m) for at least 5 seconds. Below is a diagram to help you navi- gate Dive mode functions.
Page 38: Deep Stop Preview
3 ALT displays by pressing the ADV button to cycle through them. They are similar to the No Decompression Main, Dive ALT 1, and Dive ALT 2 displays, respectively. See Deep Stop in the Dive Features chapter for further details. NOTE: The Geo 4.0 does not penalize for a missed Deep Stop. remaining...
Page 39: Surfacing
Main If the current PO2 value is greater than 1.6, then a warning not to switch will display. The Geo 4.0 will maintain the current gas without switching. The diver may override the Geo 4.0 and force the gas switch by pressing the SELECT button during the "dont CHNG TO" message.
Page 40: Decompression
COMPLICATIONS The preceding information has described standard dive operations. Your new Geo 4.0 is also designed to help you to the surface in less than ideal situations. The following is a description of these situations. Take some time to familiarize yourself with these operations before diving your Geo 4.0.
Page 41: Delayed Violation 1 (Dv 1)
• The down arrow continues to flash until descending below the required Stop Depth, then the full stop graphic will be on solid. • If the DV1 status is ignored, the Geo 4.0 will enter DV1 Surface mode for 5 minutes upon surfacing from the dive. The down arrow, Decompres- sion Stop depth/time, and Surface Time will be displayed.
Page 42: Violation Gauge Mode During A Dive
Deco is activated during a dive in Free mode, described later. Operation would then continue in VGM during the remainder of that dive and for 24 hours after surfacing. VGM turns the Geo 4.0 into a digital instrument without any decompression or oxygen related calculations or displays. Upon activation of VGM, the audible alarm will sound and the alarm LED will flash.
Page 43: High O
GEO 4.0 OPERATING MANUAL HIGH O SAT (OXYGEN SATURATION) Warning >> at 80 to 99% (240 OTU) Alarm >> at 100% (300 OTU) Warning When O reaches the Warning Level, the audible alarm sounds and the O2 SAT (saturation) value will flash in place of the DTR (Dive Time Remaining).
Page 44: Alarm On Surface
GEO 4.0 OPERATING MANUAL Alarm On Surface • If O2 SAT is 100% upon surfacing while in No Decompression, O2 SAT 100% will flash until the O2 SAT value decreases below 100%. • If you surface due to 100% O2 without having completed the Decompression obligation, the full TLBG and O2 value (100) will flash with O2SAT icons for the first 10 minutes, then operation will enter Violation Gauge Mode.
Page 46: On The Surface Before A Dive
The Geo 4 shall enter Standby mode 10 minutes after Gauge Surface Mode has been activated (or 10 minutes after the post dive transition period has ended) and no button presses or dives have been initiated. Pressing a button will wake the Geo 4.0 up from Standby Mode.
Page 47: Initiating A Dive
INITIATING A DIVE With the Geo 4.0 in Gauge Mode, a dive will commence upon descending to 5 ft (1.5 m) for longer than 5 seconds. Below is a diagram to help you navigate Gauge Dive Mode functions. The dive will end and revert to Surface Mode upon ascent to 3 ft (0.9 m) of depth for at least 1 second.
Page 48: Run Timer
The max depth will also be represented by dashes. * The maximum functional depth (330 ft / 100 m) is the depth at which the Geo 4.0 can properly perform calculations or provide accurate display information.
Page 50: Free Dive Mode Details
• The mathematical models currently used in the Geo 4.0 are based on no decompression/decompression multilevel repetitive dive schedules. • These algorithms do not take into account the physiological changes associated with the high pressures that competitive type free diving can expose a diver to.
Page 51: On The Surface Before A Dive
The Geo 4 shall enter Standby mode 10 minutes after Free Surface Mode has been activated (or 10 minutes after the post dive transition period has ended) and no button presses or dives have been initiated. Pressing a button will wake the Geo 4.0 up from Standby Mode.
Page 52: Countdown Timer (Cdt)
COUNTDOWN TIMER (CDT) The Geo 4.0 allows you to set a CDT time from 0:01 - 59:59 (min:sec). On the surface the CDT must be started and stopped in the CDT Status screen by selecting ON or OFF. The CDT will run in the background, while on the surface and during dives, until it counts down to 0:00, or it is turned OFF.
Page 53: Set Mode (Operation Mode)
INITIATING A DIVE With the Geo 4.0 in Free Mode, a dive will commence upon descending to 5 ft (1.5 m) for longer than 5 seconds. Below is a diagram to help you navigate Free Dive Mode functions. The dive will end and revert to Surface Mode upon ascent to 3 ft (0.9 m) of depth for at least 1 second.
Page 54: Free Dive Main
GEO 4.0 OPERATING MANUAL FREE DIVE MAIN The Free Dive Main provides basic information including depth, no decompression time, dive time, temperature and nitrogen loading during the dive. No Decompression Time Remaining depth 0 - 599 min, all times greater than 599 display as 599...
Page 56: Uploading/Downloading Data
Lens Protector. Small scratches will naturally disappear underwater. • Soak and rinse the Geo 4.0 in fresh water at the end of each day of diving, and check to ensure that the areas around the Low Pressure (Depth) Sensor, wet contacts, and buttons are free of debris or obstructions.
Page 57 • Inspect the button, lens, and housing to ensure they are not cracked or damaged. WARNINGS:If damage or corrosion is found, return your Geo 4.0 to an authorized Oceanic dealer, and DO NOT attempt to use it until it has received factory prescribed service.
Page 58: Altitude Sensing And Adjustment
• No adjustments are made during any time that the Wet Contacts are bridged. • When diving in high altitude waters from 3,001 to 14,000 feet (916 to 4,270 meters), the Geo 4.0 automatically adjusts to these conditions pro- vidingcorrected Depth, and reduced No Deco and O2 Times at intervals of 1,000 feet (305 meters).
Page 60 GEO 4.0 OPERATING MANUAL DSAT BASED NDLS (HR:MIN) (IMPERIAL) Altitude 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 (feet) 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 Depth (FT) 4:20 3:21 3:07 2:55...
Page 61 GEO 4.0 OPERATING MANUAL Z+ BASED NDLS (HR:MIN) (IMPERIAL) Altitude 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 (feet) 3000 4000 5000 6000 7000 8000 9000 10000 11000 12000 13000 14000 Depth (FT) 3:17 2:30 2:21 2:14...
Page 62 GEO 4.0 OPERATING MANUAL SPECIFICATIONS CAN BE USED AS • Watch • Dive Computer (Air or Nitrox) • Digital Depth Gauge/Timer • Free Dive Computer DIVE COMPUTER PERFORMANCE • Buhlmann ZHL-16c based PZ+, or DSAT based, algorithm. • No Decompression limits closely follow PADI RDP.
Page 63 GEO 4.0 OPERATING MANUAL SPECIFICATIONS (CONTINUED) NUMERIC DISPLAYS: Range: Resolution: • Dive Number 0 to 24 • Depth 0 to 330 ft (100 m) 1 FT (0.1/1 M) (0 - 99.9 M, > 99.9 then 100 M) • FO2 Set Point Air, 21 to 100 % •...
Page 64 GEO 4.0 OPERATING MANUAL ABBREVIATIONS/TERMS = Alarm M.D (D.M) = Month.Day (Day.Month) = Ascent Rate MIN (min) = Minutes (time) = Atmospheres Absolute = Meters Per Minute = Audible = No Deco DTR = Metric Unit Of Pressure = No Deco Limit...
Page 65 Serial Number: ___________________________________________________________________________________________________ Firmware Rev: ___________________________________________________________________________________________________ Date of Purchase: ___________________________________________________________________________________________________ Purchased from: ___________________________________________________________________________________________________ Below to be filled in by an Authorized Oceanic Dealer: Date Service Performed Dealer/Technician OCEANIC WORLD WIDE OCEANIC USA 1540 North 2200 West Salt Lake City, Utah, 84116 Tel: 888-270-8595 Web: www.OceanicWorldwide.com...

Oceanic GEO 4.0 Operating Manual

Getting Started

Watch Mode

Dive Features

Norm Surface Mode

Norm Dive Mode

Gauge Mode

Free Mode

Reference

Technical Data

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