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Tusa Element Owner's Manual

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Summary of Contents for Tusa Element

  • Page 2: Notices

    The program within the Element simulates 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 Element dive computer model is based upon the latest research and experiments in decompression theory.

  • Page 3: Table Of Contents

    CONTENTS NOTICES ..................................2 FULL LCD ..................................6 FEATURES AND DISPLAYS ..................... 7 INTRODUCTION ................................8 CONTROL BUTTON ..............................8 BAR GRAPHS ................................9 Nitrogen Loading Bar Graph (NiBG) ........................9 Oxygen Bar Graph (O2BG) ..........................10 Ascent Rate Indicator (ASC) ..........................10 ALPHA / NUMERIC DISPLAYS ..........................
  • Page 4 CONTENTS (continued) SET MODE ................................20 TO SET FO2 ................................. 20 TO SET WET ACTIVATION ..........................21 TO SET UNITS OF MEASURE ..........................22 TO SET HOUR FORMAT ............................. 23 TO SET TIME ............................... 24 TO SET PO2 ALARM ............................25 TO SET FO2 50% DEFAULT ..........................
  • Page 5 MODULE REMOVAL FROM BOOT .......................... 55 BATTERY REPLACEMENT ............................55 RETURNING THE MODULE TO BOOT ........................59 ALTITUDE COMPENSATION ............................ 60 SPECIFICATIONS ..............................61 TUSA INTERNATIONAL ............................66 SERVICE RECORD ..............................67 Pay special attention to items marked with this Warning symbol...

  • Page 6: Full Lcd

    Components: a. Icon - DS (Deep Stop) Icon - Descend Arrow Icon - Stop Bar Icon - Ascend Arrow b. O2 Bar Graph c. Icons - Operating Modes d. Icons - Times e. Icons - Am/Pm f. Icons - Depths g.

  • Page 7: Features And Displays

    NOTE: The Element will enter Dive Mode upon descent to 5 FT (1.5 M) if first activated by push button or if Wet Activation was previously set ON. FEATURES and DISPLAYS...

  • Page 8: Introduction

    INTRODUCTION Welcome to TUSA and thank you for choosing the Element ! It is extremely important that you read this manual in sequence and understand it completely before attempting to use the Element. 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. BAR GRAPHS Nitrogen Loading Bar Graph (NiBG) The NiBG (Fig. 1a) represents tissue loading of nitrogen, showing your relative no decom- pression or decompression status.

  • Page 10: Oxygen Bar Graph (O2Bg)

    Oxygen Accumulation Bar Graph (O2BG) The O2BG (Fig. 2a) represents oxygen accumulation, showing the maximum of either per dive accumulated oxygen, or 24 hour period 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. Fig.

  • Page 12: Time Displays

    Time 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 (not blinking) when times are calculated projections (e.g., Time to Fly).

  • Page 13: Power Supply

    POWER SUPPLY The Element utilizes one (1) type CR 2450 Lithium 3 volt cell style Battery that should provide 300 hours of continuous, or 50 activation periods, of operation. • If you conduct 1 dive each time the unit is activated, you should obtain approximately 50 dives.
  • Page 14 • Upon decreasing to a voltage level that will no longer sustain proper operation (<= 2.50 v), the icon will flash 5 times followed by shutdown of the unit. • If a Low Battery Condition exists when the unit is activated (by pressing the button), the graphic bAT and the Battery Indicator will appear flashing for 5 seconds followed by shutdown of the unit.

  • Page 15: Fo2 Mode

    Nitrox which is a percentage of O2 (FO2) other than AIR (a numerical value between 21 and 50 %). When set for an FO2 value of AIR (Fig. 9), the Element will perform calculations the same as if FO2 were set for 21% O2, internally accounting for O2 accumulation for any subsequent Fig.

  • Page 16: Fo2 50% Default

    FO2 50% DEFAULT If the FO2 Default is set to ON (Fig. 11) and FO2 is set to a value greater than 21%, the FO2 set point value will automati- cally revert to 50% 10 minutes after that dive. The Maximum Depth that can be achieved with a PO2 of 1.60 ATA will also be displayed.

  • Page 17: Activation And Setup

    WARNING: During Activation and Diagnostics, if any display or function varies from the information presented here, return the Element to your Authorized TUSA Dealer for inspection. ACTIVATION and SETUP...

  • Page 18: Activation

    WARNING: If the unit is activated at elevations higher than 14,000 feet (4,270 meters), it will per- form a diagnostic check and immediately shutdown. To Activate the Element, press and release the Button. • Upon manual activation, the unit will enter Diagnostic Fig. 13 - DIAGNOSTIC MODE Mode (Fig.

  • Page 19: Wet Contact Activation

    Wet Contact Activation (only if set ON) The Element will also automatically activate by Wet Contact. This is accomplished by bridging the gap between contacts located on the Button's stem and back of the case. If no dive is made within 2 hours after initial activation, the unit will automatically deactivate.

  • Page 20: Set Mode

    SET MODE After gaining access to Set Mode, settings can be made in sequence one after the other, or you can access a specific item that you want to set, bypassing others. To access Set Mode while the Surface Sequence is scrolling, press the button for 2 seconds.

  • Page 21: To Set Wet Activation

    Factory set for ON, Wet Activation can also be set OFF (dis- abled) to prevent inadvertent activation during travel or storage. When set ON, the Element will automatically Activate and enter Dive Mode upon immersion in water. • After having set and accepted the FO2 setting, the Set Wet Activation screen appears displaying the graphics ACt and WET with the Set Point flashing (Fig.

  • Page 22: To Set Units Of Measure

    • Press/release the button (less than 2 seconds) to toggle between ON and OFF. • Depress the button for 2 seconds to accept the Set Point and advance to Set Units Of Measure. TO SET - UNITS OF MEASURE Factory set for Imperial, Units of can also be set for Metric. •...

  • Page 23: To Set Hour Format

    TO SET - HOUR FORMAT Factory set for 12 Hour (12: AM to 11: PM), the Hour Format can also be set for 24 Hour (0: to 23: hours). • After having set and accepted Units, the Set Hour Format screen appears with the Set Point flashing (Fig.

  • Page 24: To Set Time

    TO SET - TIME Set for factory local time, the Time can be set to values between 1:00 and 12:59 (AM/PM) or 0:00 and 23:59. • After having set and accepted Hour Format, the Set Time screen appears with the Hour Set Point flashing (Fig. 21). - - or - - •...

  • Page 25: 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). • After having set and accepted the Time, the Set PO2 Alarm screen appears with the Set Point flashing (Fig.

  • Page 26: To Set Fo2 50% Default

    TO SET - FO2 50% DEFAULT Factory set ON, the FO2 50% Default feature can be set to OFF. The effects of this feature being ON or OFF are described on page 16. • After having set and accepted the PO2 Alarm Set Point, the Set FO2 50% Default screen appears with the Set Point flashing (Fig.

  • Page 27: Summary Of Pre Dive Setup

    TO SET - NO DECO DEEP STOP (DS) Factory set OFF, the No Deco Deep Stop feature can be set to ON. The effects of this feature being ON or OFF are described on page 34. • After having set and accepted the FO2 50% Default Set Point, the Set DS screen appears with the Set Point flashing (Fig.
  • Page 28 WARNINGS AND SAFETY RECOMMENDATIONS • It should not be considered that the capabilities built into the Element provide an implied approval or consent from TUSA for individuals to exceed the defined limits for recreational diving, as agreed on by all internationally recognized training agencies.

  • Page 29: Plan And Dive Modes

    WARNINGS: Making decompression dives without the proper preparation and train- ing will place you in an unnecessarily dangerous situation. Existing data for making planned decompression dives is extremely limited, and virtually non-existent for repetitive decompression diving. Decompression diving greatly increases your risk of decompression sickness.

  • Page 30: Pre Dive Planner

    PRE DIVE PLANNER The Pre Dive Planner, 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. No decompression times (limits), or NDLs, are only displayed for depths where there is at least 1 minute of theoretical dive Depth...
  • Page 31 • If the O2 Bar Graph is displayed (Fig. 25Ba), it is calculated to be controlled by O2 saturation. NOTE: The Element will store O2 accumulation data for up to 10 dives conducted during a 24 hour period. If the maximum limit for O2 saturation has been exceeded for that day (24 hour period), all segments of the O2BG will flash.

  • Page 32: Nibg (Nitrogen Loading Bar Graph)

    NIBG (NITROGEN LOADING BAR GRAPH) (Fig. 26a) As your Depth and Elapsed Dive Time (EDT) increase, the NiBG 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 33: Control Of Displays

    NO DECOMPRESSION DIVE MODE The Element will enter the No Decompression Dive Mode when you descend to 5 FT (1.5 M) for 5 seconds. Fig. 28 - NO DECO MAIN No Deco Dive Main Display (Fig.

  • Page 34: No Deco Dive Deep Stop

    No Deco Alternate 2 Display (Fig. 30) The ALT 2 display will not appear when FO2 is set for AIR. Information includes the graphic FO2, current value of PO2 with graphic PO2, and the FO2 value set (21 to 50). No Deco Dive DEEP STOP On any No Deco dive in which Depth exceeds 80 FT (24 M), a Deep Stop Preview screen (Fig.
  • Page 35 Upon ascending to within10 FT (3 M) below the Stop Depth, the Deep Stop Main screen (Fig. 32) will automatically appear displaying the Stop Depth (1/2 Max Depth) with the 2 minute Countdown Timer that counts down from 02:00 to 0:00 (min:sec).

  • Page 36: No Deco Dive Safety Stop

    No Deco Dive SAFETY STOP (Fig. 34) Upon ascending to 20 FT (6 M) on any No Decompression dive in which Depth exceeded 30 FT (9 M), a Safety Stop screen will appear displaying a recommended Stop at 15 FT (4.5 M) with a 3 minute Countdown Timer that counts down from 03:00 to 0:00 (min:sec).

  • Page 37: Decompression Dive Mode

    DECOMPRESSION DIVE MODE The Element is designed to help you by providing a representa- tion of how close you are to entering decompression. Decom- pression Dive Mode activates when theoretical No Decompres- sion time/depth limits are exceeded. Upon entering Decompression Mode, the Mode icon will change from No Deco to Deco (Fig.

  • Page 38: Conditional Violation Mode

    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 Stop Depth indicated until the next shallower Stop Depth appears. Then, slowly ascend to, but not shallower than that Stop Depth.

  • Page 39: Delayed Violation Mode # 1

    Required Stop Depth. This is a continuation of a Conditional Violation. DELAYED VIOLATION MODE #2 (Fig. 39) The Element cannot calculate decompression times for Stop Fig. 38 - DELAYED Depths much greater than 60 FT (18 M) and offers no indication...

  • Page 40: Delayed Violation Mode # 3

    Violation Gauge Mode during the remainder of that dive and for 24 hours after surfacing. Violation Gauge Mode turns the Element into a digital instrument without any Nitrogen or O2 monitoring functions. Only Current Depth, Max Depth, Elapsed Dive Time, and the Ascent Rate Indicator will be displayed.
  • Page 41 Violation Gauge Mode would be preceded by entering Delayed Violation Mode #2, or if High O2 occurs while in Deco. The Element will also enter Violation Gauge Mode 5 minutes after reaching the surface from a dive in which a Delayed Violation occurred.

  • Page 42: High Po2

    HIGH PO2 When partial pressure of oxygen (PO2) increases to 0.20 ATA less than the PO2 Alarm Set Point, the graphic PO2 (in place of DTR), and UP Arrow icon will appear on the Main Display (Fig. 47) until PO2 decreases. Elapsed Dive Time, Current Depth, and bar graphs will continue to be displayed.
  • Page 43 HIGH OXYGEN ACCUMULATION The O2BG displays 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 O2BG offers you a convenient way to consistently monitor how close you are coming to the limits of O2 exposure.
  • Page 44 • Until it has shut itself off, you must not use the Element at a different Altitude than the Altitude at which it was activated. Doing so will result in an error equal to the difference in barometric pressure, and possibly a false dive mode with erroneous data.

  • Page 45: Post Dive Modes

    RESPONSIBLE COMPUTER DIVING • Plan each dive, and dive your plan - Your computer was not designed to make decisions for you, only to provide you with the information you need to make responsible decisions for yourself. This begins with a dive plan that will help you avoid a low air or decompression situation. •...

  • Page 46: Post Dive Surface Mode

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

  • Page 47: After The Transition Period (The First 2 Hours)

    If you descend during the 10 minute Transition Period, 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 Elapsed Dive Time. AFTER THE TRANSITION PERIOD (THE FIRST 2 HOURS) Once 10 minutes have elapsed, the Surface Interval time display colon stops flashing indicating that the Dive and Transition Period are completed, and a subsequent descent will be consid-...

  • Page 48: Pre Dive Planner

    Log Mode 0:19 if no The Element will store up to 12 dives in its Log for viewing. previous dive Once the Log is full (12 dives), each subsequent dive will then overwrite the oldest dive stored in the Log. It is therefore sug- gested that you transfer the Log's data to your log book at the end of each day of diving.
  • Page 49 Each dive has up to 3 Log screens >> Dive Identifier (Preview), Dive Data, and O2 Data (if a Nitrox dive). Dives are displayed in a reverse sequence that starts with the dive most recently recorded, back to the oldest one stored. The most recent dive will always be the first shown in the sequence.

  • Page 50: After The First 2 Hours

    > Press/release the Button to view the third screen. O2 Data (the third screen) information includes (Fig. 57) - • Log Mode icon • Graphic FO2 with FO2 Set Point (at bottom) • Maximum PO2 level reached during the dive with the MAX icon and graphic PO2.

  • Page 51: Wet Contacts

    2 hours, then automatically reactivate again if wet, repeating the action until cleaned and dried. RESET (CLEAR) FEATURE The Element is configured with a RESET feature that allows data to be cleared, including Nitrogen and Oxygen calculations and Log Mode entries.
  • Page 52 RESET PROCEDURE • While the Surface Sequence is scrolling, press/release the button (< 2 seconds) to access the Log Mode displaying the first screen of the most recent dive (Dive Preview/Identifier). • Press/release the button again (< 2 seconds) to access the second Log screen (Dive Data) of the most recent dive.

  • Page 53: General

    GENERAL...

  • Page 54: Care And Cleaning

    Instrument Lens Protector. Small scratches will naturally disappear underwater. • Soak and rinse the Element 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. 61a) and button are free of debris or obstructions.

  • Page 55: Module Removal From Boot

    NOTE: The procedures that follow must be closely adhered to. Damage due to improper battery replacement is not covered by the unit's warranty. MODULE REMOVAL FROM BOOT If the Module is in a Console, bend the rubber Console Boot back to expose the edge of the Module.
  • Page 56 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. 62) or a Battery Hatch Tool.
  • Page 57 WARNING: If damage or corrosion is found, return your Element to an Authorized TUSA Dealer, and DO NOT attempt to use it until it has received factory prescribed service. Battery Installation • Slide a new 3 volt type CR2450 Lithium Battery, negative ( - ) side down into the Battery Cavity.
  • Page 58 WARNING: If there are any portions of the display missing or appearing dim, or if a Low Battery condi- tion is indicated, return the Element to an Authorized TUSA Dealer for a complete evaluation before at- tempting to use it.

  • Page 59: Returning The Module To Boot

    UNEXPECTED LOSS OF DISPLAYED INFORMATION If your Element 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 Decompression and Oxygen Limits, and a critical reason to avoid entering Decompression.

  • Page 60: Altitude Compensation

    The Element 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 meters (feet) of fresh water rather than feet (meters) of sea water.

  • Page 61: Specifications

    SPECIFICATIONS CAN BE USED AS OPERATIONAL MODES • Activation/Diagnostic • Air Computer • Nitrox Computer • Serial Number • Surface DIVE COMPUTER PERFORMANCE • Time to Fly Countdown • Buhlmann ZHL-16c based Pelagic Z+ algorithm • Desaturation Countdown • Pre Dive Planner •...
  • Page 62 SPECIFICATIONS (CONTINUED) DISPLAY RANGE/RESOLUTION Numeric Displays: Range: Resolution: • Dive Number 0 - 12 • Depth 0 - 330 FT (99.9 M) 1 FT (0.1 M) • Maximum Depth 0 - 330 FT (99.9 M) 1 FT (0.1 M) • FO2 Set Point Air, 21 - 50 % •...
  • Page 63 SPECIFICATIONS (CONTINUED) BAR GRAPHS Nitrogen Bar Graph segments Oxygen (O2) Bar Graph: segments • No Deco Normal zone • Normal zone • No Deco Caution zone • Caution zone • Decompression Warning zone • Danger zone Variable Ascent Rate Indicator: 60 FT (18 M) & Shallower Deeper than 60 FT (18 M) segments segments...
  • Page 64 SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE (continued) Dive Log Mode: • Stores 12 most recent dives in memory for viewing • After 12 dives, adds 13th dive in memory and deletes the first dive Altitude: • Operational from sea level to 14,000 feet (4,270 meters) elevation •...
  • Page 65 Operating Temperature: • The Element will operate in waters having temperatures 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...

  • Page 66: Tusa International

    TUSA INTERNATIONAL CONTACTS Tabata USA, Inc Tabata Europe Corporation B.V. 2380 Mira Mar Avenue Den Brielstraat 2 B, 1055 RV Long Beach, CA 90815 Amsterdam, The Netherlands Tel: 562-498-3708 Tel: 31-(0)20 68 15 955 Fax: 562-498-0415 Fax: 31-(0)20 68 24 527 www.tusa.com...

  • Page 67: Service Record

    SERVICE RECORD Serial No. & Rev. No. __________________ Date of Purchase _____________________ Purchased From _____________________ Below to be filled in by an Authorized TUSA Dealer: Date Service Performed Dealer / Technician...

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