Hollis DG02 Operating Manual
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Hollis DG02 Operating Manual

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DG02
DIVE COMPUTER
OPERATING MANUAL

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  • Page 1 DG02 DIVE COMPUTER OPERATING MANUAL...

  • Page 2: Limited Two-Year Warranty

    DIVE COMPUTER MODEL The program within the DG02 simulates the absorption of nitrogen into the body by using a mathemati- cal model. This model is merely a way to apply a limited set of data to a large range of experiences.

  • Page 3: Table Of Contents

    CONTENTS LIMITED TWO-YEAR WARRANTY ..........................2 NOTICES ..................................2 DIVE COMPUTER MODEL ............................2 FULL LCD ..................................6 FEATURES AND DISPLAYS ..................... 7 INTRODUCTION ................................8 CONTROL BUTTON ..............................8 BAR GRAPHS ................................9 Tissue Loading Bar Graph (TLBG) ......................... 9 Oxygen Bar Graph (O2BG) ..........................
  • Page 4 CONTENTS (continued) SET MODE ................................22 Set Mode Access ..............................22 TO SET FO2 ................................. 23 PC INTERFACE ..............................24 TO SET UNITS OF MEASURE ..........................25 TO SET HOUR FORMAT ............................. 25 TO SET TIME ............................... 26 TO SET DATE ..............................27 TO SET PO2 ALARM ............................
  • Page 5 CONTENTS (continued) POST DIVE MODES ....................... 49 POST DIVE SURFACE MODE ..........................50 TRANSITION PERIOD .............................. 50 AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) .................. 51 Time to Fly/Desaturate ............................51 Pre Dive Planning Sequence ..........................52 Log Mode ................................53 AFTER THE FIRST 2 HOURS ..........................

  • Page 6: Full Lcd

    Components: a. Icon - Operating Mode b. Icon - Battery Status c. O2 Bar Graph d. Icon - Time e. Ascent Rate Indicator f. Icon - Ascent Too Fast g. Icon - Depth h. Icon - Dive No. i. Icon - Log Mode j.

  • Page 7: Features And Displays

    FEATURES and DISPLAYS...

  • Page 8: Introduction

    INTRODUCTION Welcome to HOLLIS and thank you for choosing the DG02 ! It is extremely important that you read this Operating Manual in sequence and understand it completely before attempting to use the DG02. Remember that technology is no substitute for common sense, and a dive computer only provides the person using it with data, not the knowledge to use it.

  • Page 9: Control Button

    CONTROL BUTTON The Control Button allows you to select display options and access specific information when you want to see it. It is also used to enter settings and activate the Backlight. BAR GRAPHS Tissue Loading Bar Graph (TLBG) The TLBG (Fig. 1a) represents tissue loading of nitrogen, show- ing your relative no decompression or decompression status.

  • Page 10: Oxygen Bar Graph (O2Bg)

    Oxygen Accumulation Bar Graph (O2BG) The O2BG (Fig. 2a) represents oxygen loading, showing the maximum of either per dive or 24 hour accumulated oxygen. As your oxygen exposure (accumulation) increases during the dive, segments will add to the O2BG, and as loading de- creases, it will begin to recede, indicating that additional exposure is allowed for that dive and 24 hour period.

  • Page 11: Alpha / Numeric Displays

    ALPHA / NUMERIC DISPLAYS Each numeric and graphic display represents a unique piece of information. It is imperative that you understand the formats, ranges, and values of the information represented to avoid any possible mis- understanding that could result in error. Depth Displays Fig.

  • Page 12: Time And Date Displays

    Time and Date Displays Time displays are shown in hour:minute format (i.e., 1:16 represents 1 hour and 16 minutes, not 116 minutes!). The colon that separates hours and minutes blinks once per second when the display is indicating real time (e.g., Elapsed Dive Time), and is solid (non-blinking) when times are calculated projections (e.g., Time to Fly).

  • Page 13: Temperature Display

    Temperature Display Ambient Temperature is displayed in the center/left portion of the screen (Fig. 7a) while in the Surface Mode and Log Mode, and can be viewed as part of an Alternate Display when the button is pressed while in a dive mode. NOTE: The Informational Displays are described in detail as the various operating modes they appear in are presented throughout this manual.

  • Page 14: Backlight

    • Depress the button again to activate as desired. POWER SUPPLY The DG02 utilizes one (1) type CR 2450 Lithium 3 volt cell that should provide 300 hours of continuous, or 50 activation peri- ods, of operation. If you conduct 1 dive each time the unit is activated, you should obtain approximately 50 dives.

  • Page 15: Low Battery Condition

    Low Battery Condition Voltage is checked upon activation and every (1) minute during operation on the surface. • When 75 % of the rated power has been consumed, the lower bar of the Battery icon (only segment) will be dis- played, and the shell of the icon will flash once per second (Fig.

  • Page 16: Fo2 Mode

    O2 (FO2) other than Air (a numerical value between 21 and 50 %). When set with an FO2 value of 'Air' (Fig. 10), the DG02 will perform calculations the same as if FO2 were set for 21% O2, internally accounting for O2 for any subsequent Nitrox dives.

  • Page 17: Fo2 50% Default

    FO2 50% Default If the Default feature is set to ON (Fig. 12) and FO2 is set to a value 'greater than 21%', the FO2 Set Point value will auto- matically revert to 50% 10 minutes after that dive. The Max Depth that can be achieved with a PO2 of 1.60 ATA will also be displayed.
  • Page 18 SET MENU While the SURFACE SEQUENCE is scrolling >> press button 2 seconds each time to access >> • SET FO2 • PC (view only) • SET UNITS • SET HOUR FORMAT • SET TIME • SET DATE • SET PO2 ALARM •...

  • Page 19: Activation And Setup

    ACTIVATION and SETUP...

  • Page 20: Activation

    ACTIVATION To Activate the DG02, press and release the Button. • Upon manual activation, the unit will enter Diagnostic Mode (Fig. 14), displaying all segments of the LCD as 8's, followed by dashes (- -), then a countdown from 9 to 0. Diagnostic Mode checks the display and Battery voltage to ensure that everything is within tolerance and functioning properly.

  • Page 21: Wet Activation

    Wet Activation When the Wet Activation feature is set On, the DG02 will automatically activate by immersion in water. This is accomplished by bridging the gap between contacts located on the button stem and back of the case. If no dive is made within 2 hours after initial activation, the unit will automatically deacti- vate.

  • Page 22: Set Mode

    If the wet contacts are bridged, the graphic 'H2O' will be displayed in place of the dive number (Fig. 17). After the unit is rinsed and dried, the dive number will replace 'H2O'. While the Surface Sequence is scrolling - •...

  • Page 23: To Set Fo2

    TO SET - FO2 Factory set for Air, FO2 can also be set to values between 21 and 50% in increments of 1%. • While the Surface Sequence is scrolling, press the button for 2 seconds. • Release the button when the FO2 screen appears with the Set Point flashing (Fig.

  • Page 24: Pc Interface

    PC INTERFACE PC Interface is not a setting, it is included in the Set menu for easy access when data in the DG02's memory is to be down- loaded (copied) to the PC download software program for storage and viewing.

  • Page 25: To Set Units Of Measure

    TO SET - UNITS OF MEASURE Factory set for Imperial, Units of can also be set for Metric. • While the Surface Sequence is scrolling, or after having set FO2, depress the button until the Set Units screen appears with the Set Point flashing (Fig. 22), then release the button. •...

  • Page 26: To Set Time

    TO SET - TIME Set for factory local time, the Time can be set to values between 0:00 and 12:59 (AM/PM) or 0:00 and 23:59. • While the Surface Sequence is scrolling, depress the button until the Set Time screen appears with the Hour digits flash- ing (Fig.

  • Page 27: To Set Date

    TO SET - DATE Factory set for the factory local Date, the Date can be set to values between 01/01/2008 and 12/31/2051. • After having set and accepted the Time, the Set Date screen appears, or while the Surface Sequence is scrolling, depress the button until it appears with the graphic dAY and Year digits flashing (Fig.

  • Page 28: To Set Po2 Alarm

    TO SET - PO2 ALARM Factory set for 1.60 (ATA), the PO2 Alarm can be set to values between 1.20 and 1.60 (ATA) in increments of .10 (ATA). • While the Surface Sequence is scrolling, depress the button until the Set PO2 screen appears with the Set Point flashing (Fig.

  • Page 29: To Set Digital Gauge Mode

    Factory set ON, Wet Activation can also be set for OFF (dis- abled) to prevent inadvertent activation during travel or storage. When set On, the DG02 will automatically Activate and enter Dive Mode upon immersion in water. • While the Surface Sequence is scrolling, depress the button until the Set Wet Activation screen appears with the Set Point flashing (Fig.

  • Page 30: To Set Deep Stop

    TO SET - DEEP STOP Deep Stop (described in more detail later in the No Deco Dive Mode section) is a completely optional safety stop that, when set ON, will trigger upon descent past 80 FT (24 M) and display a recommended Stop to be taken at 1/2 the calculated Max Depth of that dive.

  • Page 31: Plan And Dive Modes

    PLAN and DIVE MODES...

  • Page 32: Pre Dive Planning Sequence Tm

    PRE DIVE PLANNING SEQUENCE The Pre Dive Planning Sequence (PDPS), which appears after Surface Mode prior to the first dive of a new activation period, provides a sequence of theoretical dive times available for depths ranging from 30 FT (9 M) to 190 FT (57 M) in 10 FT (3 M) increments.
  • Page 33 • If the O2BG is displayed (Fig. 31B), it is calculated to be controlled by oxygen loading. NOTE: The DG02 will store O2 calculations for up to 10 dives conducted during a 24 hour period. If the O2 limit (100% = 300 OTU) has been exceeded for that day (24 hour period), all segments of the O2BG will be displayed flashing.

  • Page 34: Tissue Loading Bar Graph

    TISSUE LOADING BAR GRAPH (TLBG) (Fig. 32a) As your Depth and Elapsed Dive Time increase, the TLBG will add segments to represent the absorption of nitrogen. While ascending to shallower depths, the number of segments displayed will begin to recede, offering a graphic representation of your multilevel diving capability.

  • Page 35: Control Of Displays

    They will revert to the Main after 5 seconds unless the button is pressed to access other Alternate Displays. NO DECOMPRESSION DIVE MODE The DG02 will enter the Dive Mode when you descend to 5 FT (1.5 M) for 5 seconds. No Deco Main Display (Fig. 34)
  • Page 36 No Deco Alternate Display #1 (Fig. 35) Information includes Current Depth with icon, Temperature with degrees icon and graphic F (or C), Time of Day with clock icon, Dive Time Remaining with icon, and bar graphs. • Press and release the button 1 time (< 2 seconds) to access Alternate Display #2.

  • Page 37: No Deco Deep Stop

    No Deco Deep Stop Preview screen (Fig. 37) The intent of this screen is to suggest that a Stop should be made as indicated (at 1/2 Max Depth) to help reduce the probability of DCS. The screen will not be available for display once you ascend 10 FT (3 M) above the calculated Stop Depth.

  • Page 38: No Deco Safety Stop

    In the event that you descend 10 FT (3 M) deeper than, or ascend 10 FT (3 M) shallower than, the Stop Depth for 10 seconds during the countdown, the No Deco Main display will replace the Deep Stop display which will be disabled for the remainder of that dive. The Deep Stop feature will be disabled and it's screens not displayed if you enter Deco or High O2 (80%), during High PO2 (=>...

  • Page 39: Decompression Dive Mode

    DECOMPRESSION The DG02 is designed to help you by providing a representation of how close you are to entering decompression. Decompres- sion Dive Mode activates when theoretical No Decompression time/depth limits are exceeded. Upon entering Decompression (Fig. 40), the Mode icon will change from No Deco to Deco, the Audible Alarm will sound and the red LED Warning Indicator will flash for 10 seconds.
  • Page 40 The amount of decompression Credit Time that you receive is dependent on Depth, with slightly less Credit given the deeper you are. You should stay slightly deeper than the Required Stop Depth indicated until the next shallower Stop Depth appears. Then, you can slowly ascend to that Stop Depth.

  • Page 41: Violation Modes

    Deco Alternate Display #2 (Fig. 44) Information includes Current Depth with icon, Temperature with icon and graphic, Time of Day with icon, Total Ascent Time with icon, and the applicable bar graphs. • Press and release the button 1 time (< 2 seconds) to access Alternate Display #2.

  • Page 42: Conditional Violation Mode

    Conditional Violation (CV) If you ascend shallower (Fig. 46a) than a Deco Stop Depth displayed (Fig. 46b), the Down Arrow, Deco Bar, and Total Ascent Time will flash until you descend below the Stop Depth. Also displayed will be Current Depth and applicable bar graphs. The Audible Alarm will sound and the red LED will flash as a warning for 10 seconds.
  • Page 43 Delayed Violation #2 (DV 2) (Fig. 48) The DG02 cannot calculate decompression times for Stop Depths much greater than 60 FT (18 M) and offers no indication of how much time spent underwater would result in the need for a greater Stop Depth.

  • Page 44: Violation Gauge Mode

    The DG02 would then operate with limited functions in Violation Gauge Mode (VGM) during the remainder of that dive and for 24 hours after surfacing. VGM turns the DG02 into a digital instrument without any decompression or oxygen monitoring Fig. 50 - VGM (during dive functions.

  • Page 45: High Po2

    HIGH PO2 When partial pressure of oxygen (PO2 or PPO2) becomes equal to, or greater than, 0.20 ATA less than the PO2 Alarm Set Point; the Audible Alarm will sound with the red LED flashing, and the current PO2 value, graphic PO2, O2 segment of the O2BG, and UP Arrow icon will appear on the Main Display as a warning until PO2 decreases.

  • Page 46: High O2

    HIGH O2 The O2BG represents either O2 accumulated during that Nitrox dive, or during the repetitive Nitrox dives you conduct during that 24 hour period, whichever of the two is greater at that time. The Caution Zone of the O2BG offers a convenient way to consistently monitor how close you are coming to the limits of oxygen exposure.

  • Page 47: Digital Gauge Mode

    DIGITAL GAUGE MODE (DGM) When DGM is set for ON, the DG02 will operate as a Digital Depth Gauge/Timer without performing any nitrogen and oxygen calculations. While in this mode, the range of the Current and Max Depth displays is extended to 399 FT (120 M) to accommodate activi- ties involving diving beyond the normal depth limit of the unit.
  • Page 48 UNEXPECTED LOSS OF DISPLAYED INFORMATION If your DG02 stops working for any reason, it is important that you have anticipated this possibility and are prepared for it. This is an important reason for not pushing the No Deco and O2 Limits, and a critical reason to avoid entering Decom- pression.

  • Page 49: Post Dive Modes

    • The oxygen features of the DG02 are intended for use by recreational divers trained for nitrox diving by an instructor certified by a recog- nized training agency to teach diving with nitrox.

  • Page 50: Post Dive Surface Mode

    POST DIVE SURFACE MODE When you ascend to 2 FT (0.6 M) for 1 second, the DG02 will enter Surface Mode and begin counting your surface interval. TRANSITION PERIOD The first 10 minutes is, in affect, a Transition Period during which time the following information is displayed (Fig.

  • Page 51: After The Transition Period (The First 2 Hours)

    If you descend during the 10 minute Transition Period, the further time underwater will be considered a continuation of that dive. The time at the surface (if less than 10 minutes) will not be added as Dive Time. AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) Once 10 minutes have elapsed, the Surface Mode icon and Surface Interval colon stop flashing (Fig.

  • Page 52: Pre Dive Planning Sequence

    The Desat countdown usually begins at some lower time (Fig. 60) with 23:50 being the maximum. If a Violation occurred during the dive a single dash ( - ) will appear instead of the letters FLY. The Desat time screen will not be displayed.

  • Page 53: Log Mode

    Log Mode The DG02 will store up to 24 dives in its Log for viewing. Each dive has 3 Log screens >> Preview, Data, and O2 (only if a Nitrox dive). Once the Log is full (24 dives), each subsequent dive will then overwrite the oldest dive stored in the Log.
  • Page 54 Dive Data information includes (Fig. 64) - • Log icon • Max Depth, reached during the dive, with icons • Temperature, minimum during the dive, with icon • Surface Interval (hr:min), prior to that dive, with icon • Elapsed Dive Time (hr:min) with icon •...

  • Page 55: After The First 2 Hours

    Operation will automatically revert to the Surface Sequence after 2 minutes if the button is not pressed to view another screen. AFTER THE FIRST 2 HOURS Two hours after the last dive, the Surface Sequence will no longer be displayed. The Fly and Desat screens will be dis- played alternately for 3 seconds each until they count down to 0:00 or another dive is made.

  • Page 56: Downloading Data To A Pc

    The Interface Cable will be connected to the Data Port located on the side of the DG02 housing and a PC USB port. Prior to attempting to download data from your DG02, refer to the instructions provided for the download package.

  • Page 57: General

    • Never participate in sharing or swapping of a dive computer. Doing so may result in injury or death. • The DG02 provides information based upon a diver’s personal dive profile, and therefore must not be shared between divers. You should...

  • Page 58: Care And Cleaning

    The propellants may chemically attack the plastic. • Soak and rinse the DG02 in fresh water at the end of each day of diving, and check to ensure that the areas around the low pressure (Depth) sensor (Fig. 69a), PC Interface Port (Fig.

  • Page 59: Inspections And Service

    DO NOT attempt to dive with it until it has been inspected by an Authorized HOLLIS Service Technician. It is possible to damage the Depth Sensor of the DG02 if it is not pressure tested properly. Ensure that the Service Technician adheres to the following Warning.

  • Page 60: Module Removal From A Boot

    MODULE REMOVAL FROM BOOT If the Module is in a Console, bend the rubber Console Boot back to expose the edge of the Module. If the Boot is flexible enough to permit, you may bend it back far enough to scoop the Module out with your finger.
  • Page 61 Battery Hatch Removal • Locate the Battery Compartment on the back of the Module. • While applying steady inward pressure on the center of the Battery Hatch, rotate the Hatch Retaining Ring 10 degrees clockwise using a flat blade screwdriver (Fig. 70) or a Battery Hatch Tool.
  • Page 62 • Replace the Hatch O-ring with a new one which must be a genuine HOLLIS part that can be purchased from an Autho- rized HOLLIS Dealer. Use of any other O-ring will void the warranty. Fig. 73 - Inserting Retaining •...
  • Page 63 WARNING: If there are any portions of the display missing or appearing dim, or if a Low Battery condi- tion is indicated, return your DG02 to an Authorized HOLLIS Dealer for a complete evaluation before Fig. 76 -Tightening the attempting to use it.

  • Page 64: Returning A Module To A Boot

    • If any portions of the display are missing or appear dim, or a Low Battery Condition is indicated after Battery replacement, return your DG02 to an Authorized HOLLIS Dealer for a complete evaluation before attempting to use it.

  • Page 65: Reset Feature

    RESET FEATURE The DG02 is configured with a RESET feature that allows data to be cleared, including Nitrogen/O2 calculations and Log Mode entries. WARNING: Reset after a dive and subsequent use for a repetitive dive conducted by the same diver could result in serious injury to or death.

  • Page 66: Altitude Compensation

    No Deco and O2 limits to add a larger zone of caution. The DG02 senses ambient pressure when it is activated, every 15 minutes while it is activated, or every 30 minutes when it is not activated. At an Altitude of 3,001 feet (916 meters), it will automatically recalibrate itself to measure depth in feet of fresh water rather than feet of sea water.

  • Page 67: Specifications

    SPECIFICATIONS CAN BE USED AS SET MENU • Air Computer • Set FO2 (Air, 21 to 50%) • Nitrox Computer • PC (to download data) • Digital Depth Gauge/Timer • Set Units (Imperial/Metric) • Set Hour Format (12/24) DIVE COMPUTER PERFORMANCE •...
  • Page 68 SPECIFICATIONS (CONTINUED) DISPLAY RANGE/RESOLUTION Numeric Displays: Range: Resolution: • Dive Number 0 - 24 • Depth 0 - 399 FT (0 - 120 M) 1 FT (.1 M / 1 M > 99.9 M) • Maximum Depth 399 FT (120 M) 1 FT (.1 M / 1 M >...
  • Page 69 SPECIFICATIONS (CONTINUED) BAR GRAPHS TLBG: segments O2BG: segments • No Decompression 1 - 5 • Normal 1 - 3 • No Deco Caution • Caution • Deco Warning 8 (all) • Danger 5 (all) VARI: <= 60 FT (18 M) >...
  • Page 70 SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE (continued) Power: • Battery 1 - 3 vdc, type CR2450 Lithium battery • Shelf life Up to 5 years • Replacement User replaceable (annual recommended) • Life expectancy 100 dive hours (if 1 - 1 hour dive per dive day) to over 300 dive hours (if 3 - 1 hour dives per dive day) Battery icon: segments displayed...
  • Page 71 • The DG02 will operate in almost any temperature diving environment in the world, between 32 °F and 140 °F (0 and 60 °C). At extremely low temperatures, the LCD may become sluggish, but this will not affect it's accuracy. If stored or transported in extremely low temperature areas (below freezing), you should warm the module and its battery with body heat before diving.
  • Page 72 WARNINGS: • The DG02 is intended for use by divers who have successfully com- pleted a nationally recognized course in scuba diving, and diving with enriched nitrogen-oxygen (Nitrox) breathing gas mixtures. • It is intended for no decompression diving, NOT intentional decom- pression diving.
  • Page 73 DG02. • If you do not fully understand how to use this dive computer, or if you have any questions, you should seek instruction in its use from your Authorized HOLLIS Dealer before you dive with this product.
  • Page 74 PELAGIC Z+ ALGORITHM >> NDLS (HR:MIN) AT ALTITUDE (IMPERIAL) A l t i t u d e 3001 4001 5001 6001 7001 8001 9001 10001 11001 12001 13001 ( f e e t ) 3000 4000 5000 6000 7000 8000 9000 10000 11000...

  • Page 75: Service Record

    SERVICE RECORD Serial Number _______________________ Date of purchase _____________________ Purchased from ______________________ Below to be filled in by an Authorized HOLLIS Dealer: Date Service Performed Dealer / Technician...
  • Page 76 DG02 was developed by - Pelagic Pressure Systems/2002 Design 2002 Davis Street San Leandro, CA 94577 © 2002 Design, 2008 Doc. No. 12-4023-r01 (12/15/08)

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