Tusa element II Owner's Manual
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Tusa element II Owner's Manual

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  • Page 2: Warranty, Notices, Decompression Model

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

  • Page 3: Table Of Contents

    CONTENTS WARRANTY, NOTICES, DECOMPRESSION MODEL ....................2 OVERVIEW ..................................7 FULL LCD ..................................8 CONTROL BUTTONS ..............................9 OPERATING MODES ..............................10 AUDIBLE ALARM ..............................10 BACKLIGHT ................................12 POWER SUPPLY ..............................13 PC INTERFACE ................................. 14 FEATURES AND DISPLAYS ............................15 BAR GRAPHS ................................
  • Page 4 CONTENTS (continued) SET A GROUP (NORM/GAUG ALARMS) ........................ 29 Set Audible Alarm ..............................29 Set Depth Alarm ..............................30 Set EDT (Elapsed Dive Time) Alarm ........................31 Set NiBG (Tissue Loading Bar Graph) Alarm ....................... 32 Set DTR (Dive Time Remaining) Alarm ........................ 32 Set PO2 Alarm ..............................
  • Page 5 CONTENTS (continued) NORM DIVE MODES ..............................53 NO DECO DIVE TIME REMAINING (NDC) ......................54 OXYGEN ACCUMULATION ............................55 ASCENT RATE INDICATOR (ASC) .......................... 55 NORM NO DECO DIVE MODE ..........................56 No Deco Deep Stop .............................. 58 No Deco Safety Stop ............................60 CAUTIONARY MODES ..............................
  • Page 6 RETURNING MODULE TO BOOT .......................... 105 ALTITUDE SENSING AND ADJUSTMENT ......................106 CHARTS OF NO DECOMPRESSION LIMITS AT ALTITUDE ................107 CHART OF OXYGEN EXPOSURE LIMITS ......................108 SPECIFICATIONS ..............................109 TUSA INTERNATIONAL ............................114 INSPECTION/ SERVICE RECORD ......................... 115...

  • Page 7: Overview

    OVERVIEW...

  • Page 8: Full Lcd

    Components: a. Icon - Log Mode b. NiBG (Nitrogen Bar Graph) c. Icon - operating mode Surface Interval Plan NDC Time No Deco Time Remaining Deco Total Ascent Time d. O2BG (O2 Bar Graph) e. Icon - Stop Time Required Elapsed Dive Time f.

  • Page 9: Control Buttons

    CONTROL BUTTONS The Element II features three Control Buttons that 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: Operating Modes

    AUDIBLE ALARM Most warning situations that activate the Audible Alarm while operating in NORM or GAUG Mode cause the Element II to emit 1 beep per second for 10 seconds, or until the situation is Fig. 1B - GAUG MODE corrected, or it is acknowledged by momentarily pressing and releasing the S button (less than 2 seconds).
  • Page 11 Situations that will activate the NORM/GAUG 10 second Alarm include - • Descent deeper than the Max Depth Set Point selected. • Dive Time Remaining at the Set Point selected. • Elapsed Dive Time at the Set Point selected. • High PO2 of 1.60 ATA or the Set Point selected. •...

  • Page 12: Backlight

    • Press the button again to activate as desired. NOTE: Extensive use of the Backlight reduces estimated Battery life. Also, the Backlight does not operate during a Low Battery Condition or when the Element II is connected to a PC.

  • Page 13: Power Supply

    The Element II checks battery voltage every 2 minutes while on the surface. • If voltage of the Element II decreases to the Warning level (2.75 volts), the Battery icon will appear on Surface display screens (Fig.

  • Page 14: Pc Interface

    PC INTERFACE Interface with a PC (for data Upload and Download) is accom- plished by connecting the Element II to a PC USB Port using the USB Interface Cable avaiable as an optional accessory. The PC Interface program, together with a USB Driver, is downloadable from tusa.com.

  • Page 15: Features And Displays

    FEATURES AND DISPLAYS...

  • Page 16: Bar Graphs

    BAR GRAPHS The Element II features 3 Bar Graphs >> NiBG, O2BG, and ASC. NiBG (Nitrogen Loading Bar Graph) The NiBG (Fig. 6a) represents tissue loading of nitrogen, show- ing your relative no decompression or decompression status. As your depth and elapsed dive time increase, segments will add to...
  • Page 17 Oxygen Bar Graph (O2BG) The O2BG (Fig. 7a) 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 saturation de- creases, it will begin to recede, indicating that additional expo- sure is allowed for that dive and 24 hour period.

  • Page 18: 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 Fig.
  • Page 19 When Times are calculated projections such as NDC and Elapsed Dive Time (Fig. 10a/b), the colon is solid (non blinking). FREE Dive Mode displays Times in minute:second format. Date is only displayed in Log Mode. Temperature Temperature can be viewed by accessing an Alternate Display Fig.
  • Page 20 WARNINGS AND SAFETY RECOMMENDATIONS • It should not be considered that the capabilities built into the Element II 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 21: Surface Modes

    SURFACE MODES...

  • Page 22: Operating Modes And Surface Mode

    5 FT (1.5 M) for 5 seconds. The Element II will enter post dive Surface Mode following a dive upon ascent to 4 FT (1.2 M) for 1 second. The Surface Interval Time colon will flash during the first 10 minutes after a NORM/GAUG dive, or first 1 minute after a FREE dive.

  • Page 23: Norm Surf Main

    NORM SURF MAIN, information includes (Fig. 12): > Surface Interval Time (hr:min) with clock/wave icon > Graphic Nor > Tank 1 icon representing Gas 1, which is the default start Gas and default Gas 10 minutes after a dive > Number of that dive (0 if no dive has been made yet) with # icon >...

  • Page 24: Norm Surf Alt

    NORM SURF ALT, information includes (Fig. 13): > Altitude graphic (EL2 to EL7), if above 3000 feet (915 meters) elevation, blank if below. > Temperature with degrees icon and graphic F (or C) > Time of Day (hr:min) with Time (clock) and AM (or PM) icons.

  • Page 25: Setting Fo2 For Nitrox Dives

    • MODs affected by the PO2 limit set will not be displayed when FO2 for Gas 1 is set to Air. • The Element II keeps track of O2 so that if FO2 for Gas 1 is subsequently set for a numerical value, the O2 accumulated during previous Air dives will be accounted for in the next Nitrox dive (during that dive period and series of repetitive dives).

  • Page 26: Set F Group (Fo2)

    Gas 2 will Default to 50% after the dive. • The Element II is programmed to prevent FO2 for Gas 2 from being set at values lower than the FO2 Set Point for Gas 1. Gas 2 can only be set to values equal to or higher than the FO2 Set Points of Gas 1.

  • Page 27: Set Fo2 Gas 1

    Set FO2 Gas 1, information includes (Fig. 15A/B): > Graphic FO2 > Max Depth allowed for the PO2 Alarm set with MAX and FT (or M) icons and graphic PO2, blank if Air > Tank 1 icon representing Gas (mix) 1 >...

  • Page 28: Set Fo2 Gas 2

    Set FO2 Gas 2, information includes (Fig. 16A/B): > Graphic FO2 > Max Depth allowed for the PO2 Alarm set with MAX and FT (or M) icons and graphic PO2, blank if Air > Tank 2 icon representing Gas (mix) 2 >...

  • Page 29: Set Fo2 50% Default

    Set FO2 50% Default, information includes (Fig. 17): > Graphics FO2, dFLt, and 50 > Set Point graphic OFF (or ON), flashing. • Pressing and releasing the S button momentarily (< 2 sec) will toggle between OFF and ON. • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and revert to the Set F screen.

  • Page 30: Set Depth Alarm

    Set Audible Alarm, information includes (Fig. 19): > Graphic AUD > Set Point graphic ON (or OFF), flashing. • Pressing and releasing the S button momentarily (< 2 sec) will toggle between ON and OFF. • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set Depth Alarm.

  • Page 31: Set Edt (Elapsed Dive Time) Alarm

    • Depressing the A and S buttons simultaneously for 2 FREE Mode has seconds will save the setting and revert to the Set A screen. separate Depth • Depressing the M button for 2 seconds, or if no button is and EDT alarms.

  • Page 32: Set Nibg (Tissue Loading Bar Graph) Alarm

    Set NiBG Alarm, information includes (Fig. 22): > Graphic NBG (meaning Nitrogen Bar Graph). > NiBG Set Point (segments) flashing, with NI icon. • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step through the Set Points from 1 to all 5 segments (Deco) one at a time.

  • Page 33: Set Po2 Alarm

    • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Set Points one at a time. • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set PO2 Alarm. •...

  • Page 34: Set U Group (Utilities)

    SET U GROUP (UTILITIES) SET U >> Wet Activation >> Units >> Deep Stop >> Safety Stop >> Conservative Factor >> Backlight Duration >> Sample Rate. > Depressing the A and S buttons simultaneously for 6 seconds while the NORM (or GAUG) Surface Main screen is displayed, will access the Set U screen (Fig.

  • Page 35: Set Units Of Measure

    Set Units, information includes (Fig. 27): > Set Point icons/graphics F and FT (or C and M), flashing. • Pressing and releasing the S button momentarily (< 2 sec) will toggle between Imperial (F, FT) and Metric (C, M). • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set Deep Stop.

  • Page 36: Set Safety Stop

    Set Safety Stop, information includes (Fig. 29): > Graphic SAF (meaning Safety Stop). > Set Point ON or OFF, flashing, with STOP icon. • Pressing and releasing the S button momentarily (< 2 sec) will toggle the Set Point between OFF and ON. •...

  • Page 37: Set Backlight Duration

    • Depressing the M button for 2 seconds, or if no button is pressed for a period of 2 minutes, operation will revert to the NORM (or GAUG) Surface Main screen. NOTE: When the Conservative Factor is set ON, the No Deco Limit times are reduced to values equivalent to those that would be available at the next higher 3000 foot (915 meter) Altitude.

  • Page 38: Set Sampling Rate

    Set Sampling Rate, information includes (Fig. 32): > Graphic SR (meaning Sampling Rate). > Set Point (seconds value), flashing, with clock icon and graphic SEC (meaning Seconds). • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Set Points of 2, 15, 30, and 60 (seconds).

  • Page 39: Set Date Format

    Set Date Format, information includes (Fig. 34): > Set Point graphic M - D (or D - M), flashing. > Graphic dAtE. • Pressing and releasing the S button momentarily (< 2 sec) will toggle the Set Point between M - D and D - M. •...

  • Page 40: Set Time

    Set Time, information includes (Fig. 36): > Graphic SET. > Time (hr:min) Set Point, Hour digits flashing, with Time (clock) and AM (or PM) icons if 12 Hour Format. • Depressing the S button will scroll upward through the Hour Set Points at a rate of 8 per second until it is released.
  • Page 41 • Depressing the S button while the Year digits are flashing will scroll upward through the Set Points at a rate of 8 per second from 2009 to 2052 (with leap year corrections). • Pressing and releasing the S button momentarily and repeatedly (<...

  • Page 42: Serial Number

    NORM (or GAUG) Surface Main screen. NOTE: The Serial Number and Firmware Revi- sion will be requested in the event that you contact TUSA regarding the Element II. Enter them in the Records section provided in the back of this manual.

  • Page 43: Norm Plan Mode

    NORM PLAN MODE TUSA strongly recommends that you review the Plan Mode dive times prior to every NORM dive to help you plan your dive as required to avoid exceeding no decompression or oxygen exposure limits. This is especially important for repetitive dives when Plan Mode indicates adjusted dive times that are available for the next dive, based on residual nitrogen or oxygen accumulation (whichever is in control) following the last dive and surface interval.
  • Page 44 • After dives, press and release the A button momentarily (< 2 sec) to access the Time to Fly screen, then again to access the Desat screen. • Press and release the S button momentarily and repeatedly (< 2 sec each time) to access the first Plan Depth/Time screen and step upward through the sequence of screens.

  • Page 45: Fly Mode

    • Press and release the S button momentarily and repeatedly (< 2 sec each time) to increase the Planned Depth in increments of 10 FT (3 M), displaying the information one screen at a time. • Depressing the M button for 2 seconds, or if no button is pressed for a period of 2 minutes, operation will revert to the NORM Surface Main screen.

  • Page 46: Desat Mode

    • Depressing the M button for 2 seconds, or if no button is pressed during a 2 minute period, operation will revert to the NORM (or GAUG) Surface Main screen. • Pressing the L button will activate the Backlight. DESAT MODE (NORM only) The Time to Desaturate counter provides calculated time for Tissue Desaturation at sea level taking into consideration the Conservation Factor setting.

  • Page 47: Norm/Gaug Log Mode

    • Depressing the M button for 2 seconds, or if no button is pressed during a 2 minute period, operation will revert to the NORM Surface Main screen. • Pressing the L button will activate the Backlight. NORM/GAUG LOG MODE Log Mode displays information from the latest 24 NORM and/or GAUG dives sequentially in reverse order (the most recent first).
  • Page 48 Log Preview, information includes (Fig. 44): > Log (book) icon. > Graphic NOR (or GAU). > Dive Mode (wave/clock/profile) icon, if NORM. > Date (month.day or day.month) the dive was conducted. > Time of Day the dive began (hr:min) with clock icon and AM (or PM) icon if set for 12 Hour Format.
  • Page 49 • Pressing and releasing the S button momentarily (< 2 sec) will access Log Data 2. • Pressing and releasing the A button momentarily (< 2 sec) will revert to the NORM (or GAUG) Surface Main screen. • Depressing the M button for 2 seconds, or if no button is pressed during a 2 minute period, operation will revert to the NORM (or GAUG) Surface Main screen.

  • Page 50: History Mode

    HISTORY MODE History Mode displays information for NORM and/or GAUG Dives. Information is retained indefinitely. Battery removal will not affect the History data stored for viewing. • History Mode can be accessed by pressing and releasing the A button momentarily 2 times (< 2 sec each time) while viewing the NORM or GAUG Surface Main.
  • Page 51 • Depressing the S button for 2 seconds will activate the Backlight. NOTE: FREE Dives are not recorded in the viewable Log or History. The data is stored in memory for subsequent download to the TUSA PC Interface program. FREE Mode uses the NORM/GAUG settings for - >>...
  • Page 52 WARNINGS: Making decompression dives without the proper preparation and training will place you in an unnecessarily dangerous situation. Existing data for making planned decompression dives is limited, and virtually non-existent for repetitive decompression diving. Decompression diving greatly increases your risk of decompression sickness.

  • Page 53: Norm Dive Modes

    NORM DIVE MODES...

  • Page 54: Deco Dive Time Remaining (Ndc)

    NO DECO DIVE TIME REMAINING (NDC) The Element II constantly monitors No Decompression status. NDC is the maximum amount of time that you can stay at your present Depth before entering a Decompression situation. It is calculated based on the amount of Nitrogen absorbed by hypothetical tissue compartments.

  • Page 55: Oxygen Accumulation

    OXYGEN ACCUMULATION If FO2 was set for a numerical value (Nitrox), the O2BG (Fig. 50a) will add segments to represent oxygen accumulation for that dive, or 24 hour period, whichever amount is greater. If O2 reaches 100% of the allowed limit (300 OTU), the graphic O2 will replace NDC.

  • Page 56: Norm No Deco Dive Mode

    NORM NO DECOMPRESSION DIVE MODE When the Wet Activation feature is set ON, the Element II will enter the NORM No Decompression Dive Mode any time you descend to 5 FT (1.5 M) for 5 seconds, even if not yet activated.
  • Page 57 NORM No Deco ALT 1, information includes (Fig. 53) - > Temperature with degrees icon and graphic F (or C) > Time of Day (hr:min) with AM (or PM) and clock icons > Max Depth with MAX and FT (or M) icons •...

  • Page 58: No Deco Deep Stop

    No Deco Deep Stop On any No Deco dive in which Depth exceeds 80 FT (24 M), a Deep Stop Preview screen (Fig. 55) can be accessed that will display the graphic DS (meaning Deep Stop) and a recom- mended Stop Depth calculated to be 1/2 the Max Depth and a Stop Time of 02:00 (2 minutes) with DS and STOP icons.
  • Page 59 Press and release the A button (< 2 seconds) to access the ALT 1 screen (Fig. 57A) that displays Elapsed Dive Time, press it again to view the ALT 2 screen (Fig. 57B) that displays Temperature, Time, and Max Depth, then if a Nitrox dive press it again to view ALT 3 that displays FO2 and PO2 (Fig.

  • Page 60: No Deco Safety Stop

    No Deco Safety Stop (Fig. 58) Upon ascending to 20 FT (6 M) on any No Deco 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 Count- down Timer that counts down from 03:00 to 0:00 (min:sec).

  • Page 61: Cautionary Modes

    CAUTIONARY MODES...

  • Page 62: Decompression

    DECOMPRESSION Decompression mode activates when theoretical No Decompression time and depth limits (NDLs) are exceeded. Upon Entry into Decompression, the Audible Alarm will sound until acknowledged or for 10 seconds. While the audible is sounding, the UP Arrow icon, Stop Bar icon, and full NiBG will flash to alert you.
  • Page 63 NOTE: Upon entry into Deco, the Deep Stop and Safety Stop features are disabled for the remainder of that dive, even when the Deco obligation is complete and No Deco status is regained. Managing Decompression Stops To fulfill your decompression obligation, you should make a safe controlled Ascent to a depth slightly deeper than, or equal to, the Stop Depth indicated and decompress for the Time indicated.

  • Page 64: Conditional Violation

    CONDITIONAL VIOLATION (CV) If you ascend shallower than the calculated Deco Stop Depth, the Audible Alarm will sound, and no off gassing credit will be given, until you descend below the Stop Depth. If you descend below the required Ceiling before 5 minutes have elapsed, operation will continue to function in Deco and off gassing credit will resume.

  • Page 65: Delayed Violation 1

    NOTE: Upon entry into the following Violation modes, the Alarm will sound, even if Set OFF. When these events occur, the Alarm cannot be acknowledged (silenced) by pressing the S button. DELAYED VIOLATION #1 (DV1) If you remain above the required Deco Ceiling Depth for more than 5 minutes, the full NiBG will flash until you descend below the required Stop Depth.

  • Page 66: Delayed Violation 2

    DELAYED VIOLATION #2 (DV2) If the Decompression obligation requires a Ceiling Depth between 60 FT (18 M) and 70 FT (21 M), the full NiBG and TAT (Total Ascent Time) digits will flash. When this occurs, you must make a controlled ascent to just deeper than, and stay as close as possible to, 60 FT (18 M) without causing the NiBG and TAT to flash.

  • Page 67: Delayed Violation 3

    DELAYED VIOLATION #3 (DV3) If you descend deeper than the MOD (Max Operating Depth) of 330 FT (99.9 M), the Up Arrow icon will flash, and the Current Depth will only display 3 dashes ( - - - ) flashing signifying that you are Out of Range.

  • Page 68: Violation Gauge Mode

    Mode (VGM) for the remainder of that dive and for 24 hours after surfacing. VGM turns the Element II into a digital instrument without any nitrogen or oxygen calculations or monitoring functions or displayed information until 24 contiguous hours elapse on the surface with no dives.
  • Page 69 In the event that a dive is made during the 24 hour period, a full 24 hour surface interval must then be served before all functions are restored. VGM Main (on surface), information includes (Fig. 66) - > Full NiBG and full O2BG, all segments flashing >...

  • Page 70: High Po2

    HIGH PO2 When partial pressure of oxygen (PO2) becomes equal to, or greater than, 0.2 (ATA) less than the PO2 Alarm value set; the Audible will sound. Note that while in Deco, High PO2 will only alarm at 1.60. • Press/release the S button to acknowledge the alarm. >...

  • Page 71: High O2

    HIGH O2 The O2BG (Fig. 68a) represents oxygen accumulated as a result of the repetitive Nitrox dives you have conducted during that operating period. The O2BG lets you monitor how close you are coming to the limits of oxygen exposure. If the theoretical amount of oxygen accumulated reaches the limit for a single exposure, or 24 hour period (300 OTU = 100%), the graphic O2 replaces NDC time and the full O2BG and Up...
  • Page 72 • Until it has shut itself off, you must not use the Element II 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 73: Switching Gas Mixes

    SWITCHING GAS MIXES...
  • Page 74 SWITCHING GAS MIXES (NORM only) During NORM Dives, the FO2 calculations/displays can be switched from Gas 1 to 2. > Switching Gas cannot be performed while on the surface. > Every dive begins with Gas 1 and 10 minutes after surfacing from a multiple gas dive, operation defaults to the Gas 1 FO2.
  • Page 75 To access the Preview screens while viewing a NORM Dive Main screen. • Depress the M button for 2 seconds to view the Gas 1 Preview screen. • Press and release the M button momentarily (< 2 sec) while the Gas 1 Preview screens is displayed to view the Gas 2 Preview screen.
  • Page 76 GAS SWITCH ROUTINE NORM DIVE MAIN 2 sec Switches from GAS 1 Gas 2 to Gas 1 (after 3 sec) PREVIEW 2 sec < 2 sec Switches from GAS 2 Gas 1 to Gas 2 (after 3 sec) PREVIEW 2 sec <...

  • Page 77: Norm Post Dive Modes

    NORM POST DIVE MODES...

  • Page 78: First 10 Minutes On Surface

    POST DIVE FIRST 10 MINUTES ON SURFACE When you ascend to 2 FT (0.6 M) for 1 second, the Surface Main screen will be dis- played. If you descend during the first 10 minutes after surfacing (referred to as the Transition Period), time underwater will be considered a continuation of that dive.

  • Page 79: After 10 Minutes On Surface

    POST DIVE AFTER 10 MINUTES ON SURFACE Once 10 minutes have elapsed, the Surface Interval time colon will stop flashing indicating that the Dive and Transition Period are completed, and a subsequent descent will be considered a new dive. You will then have full access to all NORM DC surface modes (e.g., Plan, Fly, Sat, Log, Hist, Set, etc.).

  • Page 80: Uploading Settings And Downloading Data

    UPLOADING SETTINGS AND DOWNLOADING DATA The Element II is configured with a Data Port located on the back of the left side that enables it to be connected to a PC through a USB port using a special Interface Cable that is available as an optional accessory.

  • Page 81: Gauge Operating Mode

    GAUGE OPERATING MODE...

  • Page 82: Digital Gauge Mode

    DIGITAL GAUGE MODE (GAUG) When GAUG is selected as the operating mode, the Element II will operate as a Digital Depth Gauge/Timer without performing nitrogen and oxygen calculations. • To access GAUG mode while the NORM Surface Main screen is displayed, press the M button 1 time for 2 seconds.
  • Page 83 NOTE: Once a dive is made in Digital Gauge Fig. 77 - GAUG SURF ALT Mode, you must wait 24 contiguous hours after surfacing before the Element II resets and will operate as an Air or Nitrox dive computer in NORM Mode or FREE Dive Mode.
  • Page 84 Gauge Dive ALT, information includes (Fig. 79) - > Temperature with degrees icon and graphic F (or C) > Time of Day (hr:min) with clock and AM (or PM) icons > Max Depth with FT (or M) and MAX icons •...

  • Page 85: Free Dive Operating Mode

    FREE DIVE OPERATING MODE...
  • Page 86 FREE DIVE MODE When Free Dive Mode is selected as the operating mode, the Element II will operate with select features. Nitrogen loading is calculated based on a default FO2 of Air and the amount remaining during 24 hours is carried over between FREE and NORM modes.
  • Page 87 • Depress the A and S buttons simultaneously for 2 seconds to access the Set Free EDT (Elapsed Dive Time) Alarm, then Set Free Depth Alarms 1, 2, 3. • Depress the S button for 2 seconds to activate the Backlight. Free Surface ALT 1, information includes (Fig.

  • Page 88: Free Countdown Timer (Cdt)

    > The display will revert to the Main after 5 seconds or if the A button is pressed/ released. • Depress the S button for 2 seconds to activate the Backlight. FREE MODE COUNTDOWN TIMER (CDT) After accessing the Free CDT Status screen from the Free Surface Main screen, the CDT can be started, stopped, and set.
  • Page 89 Once the CDT has been Set and Started (by selecting ON), it will continue to run in the background while on the surface until turned OFF (stopped) or the Time reaches 0:00 at which time the Alarm will strike, the graphic CDT will be displayed, and the Timer will revert to OFF.

  • Page 90: Free Elapsed Dive Time (Edt) Alarm

    • Pressing and releasing the A button momentarily (< 2 sec) will save the Minute Set Point and the Seconds digits will flash. • Depressing the S button will scroll upward through the Seconds Set Points in 1 second increments at a rate of 8 per second.

  • Page 91: Free Depth Alarms (Das)

    NOTE: The FREE EDT Alarm can only be Set (turned OFF or ON) while on the Surface and can not be changed during a Dive. Set Free EDT Alarm, information includes (Fig. 89) - > Graphics EDT, 30 with clock icon, and SEC >...
  • Page 92 • Press and release the A button momentarily (< 2 sec) while viewing the Set Free EDT Alarm screen to access Set Free DA1 (Depth Alarm 1) screen. DA2 and DA3 are similar. Set Free DA1, information includes (Fig. 91) - >...

  • Page 93: Free Dive Main And Alts

    Free Dive Main, information includes (Fig. 92) - > NiBG, if any Nitrogen remaining from NORM or FREE dives conducted within the previous 24 hours > NDC Time (min:sec) with wave/clock/profile icons > Temperature with degrees icon and graphic F (or C) >...

  • Page 94: Free Dive Alarms

    • If no button is pressed during a period of 10 seconds, operation will revert to the Main. Free Dive ALT 2, information includes (Fig. 94) - > Time of Day with clock and AM (or PM) icons > Max Depth with MAX and FT (or M) icons >...
  • Page 95 Free Depth Alarms When Depth reaches the Free Depth Alarm 1 Set Point, 3 short beeps will sound 3 times during which the graphic DA1 will flash (Fig. 96), then NDC will be restored. The audible and flashing graphic will be repeated when Depth reaches the DA 2 and DA 3 Set Points, if set On.
  • Page 96 When Nitrogen loading increases to the Caution level, 3 short beeps will sound 3 times; and 4 NiBG No Deco segments, the Up Arrow icon, and the graphic NBG (in place of NDC) will be displayed (flashing) (Fig. 98). After the beeps, the flashing will continue until the NiBG recedes to 3 segments at which time the NDC will be restored and the Up Arrow icon will be removed.
  • Page 97 The mathematical model currently used in the Element II is based on no decompression/decompression multilevel repetitive dive schedules. This algorithm does not take into account the physiological changes associated with the high pressures that competitive type Free diving can expose a diver to.
  • Page 98 RESPONSIBLE COMPUTER DIVING • Plan each dive, and dive your plan. The Element II 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 99: General

    GENERAL...

  • Page 100: Care And Cleaning

    Instrument Lens Protector. Small scratches will naturally disappear underwater. • Soak and rinse the Element II 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. 100a) and button are free of debris or obstructions.

  • Page 101: Module Removal From Boot

    NOTE: The procedures that follow must be closely adhered to. Dam- age due to improper battery replacement is not covered by the unit's warranty. When the battery is removed, settings and calculations for repetitive dives will be retained in non volatile memory for subsequent opera- tions.
  • Page 102 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. 101) or a Battery Hatch Tool.
  • Page 103 WARNING: If damage or corrosion is found, return your Element II to an Authorized TUSA Dealer, and DO NOT attempt to use it until it has Fig. 103 -INSERTING received factory prescribed service.
  • Page 104 • Carefully place the Battery Hatch (with O-ring) into position on the rim of the Battery Compartment, then press it evenly and completely down into place with your same thumb. • Maintain the Battery Hatch securely in place and, using your other hand, slide the Retaining Ring down off your thumb and into position around the Battery Compartment.

  • Page 105: Returning Module To Boot

    WARNING: If there are any portions of the display missing or appearing dim, or if a Low Battery condition is indicated, return the Element II to an Authorized TUSA Dealer for a complete evaluation before attempting to use it. RETURNING THE MODULE TO BOOT •...

  • Page 106: Altitude Sensing And Adjustment

    1 foot (30 cm) of each other to record that ambient pressure as the current Altitude. The mathematical model in the Element II accounts for the reduced No Deco Dive Times available based on National Oceanic and Atmospheric Administration (NOAA) guide- lines.

  • Page 107: Charts Of No Decompression Limits At Altitude

    NDLs listed in the tables for the 5,001 to 6,000 foot (1,526 to 1,830 meter) range. The Element II will not function as a Dive Computer above 14,000 feet (4,270 meters). PELAGIC Z+ ALGORITHM >> NDLS (HR:MIN) AT ALTITUDE (IMPERIAL)

  • Page 108: Chart Of Oxygen Exposure Limits

    PELAGIC Z+ ALGORITHM >> NDLS (HR:MIN) AT ALTITUDE (METRIC) Altitude 1221 1526 1831 2136 2441 2746 3051 3356 3661 3966 (meters) 1220 1525 1830 2135 2440 2745 3050 3355 3660 3965 4270 Depth ( M ) 3:37 2:41 2:31 2:23 2:16 2:10 2:04...

  • Page 109: Specifications

    SPECIFICATIONS CAN BE USED AS NORM/GAUG SET MODES • Air Computer • Nitrox Computer • Set F Group (FO2 items): • Digital Depth Gauge/Timer • FO2 GAS1 (Air, 21 to 50%) • Free Dive Depth Gauge/Timer • FO2 GAS2 (Air, 21 to 100%) •...
  • Page 110 SPECIFICATIONS (CONTINUED) NUMERIC DISPLAYS: Range: Resolution: • Dive Number 0 to 24 • Current Depth 0 to 399 FT (120 M) 1 FT (.1/1 M ) • Maximum Depth 399 FT (120 M) 1 FT (.1/1 M) • Gas 1 FO2 Set Point Air, 21 to 50 % •...
  • Page 111 SPECIFICATIONS (CONTINUED) BAR GRAPHS Nitrogen Bar Graph segments • No Deco Normal zone • No Deco Caution zone • Decom Warning zone Oxygen (O2) Bar Graph: segments • Normal zone • Caution zone • Danger zone Ascent Rate Indicator: 60 FT (18 M) & Shallower Deeper than 60 FT (18 M) segments segments...
  • Page 112 SPECIFICATIONS (CONTINUED) NORM/GAUG Dive Log Mode: • Stores 24 most recent NORM/GAUG dives in memory for viewing • After 24 dives, adds 25th dive in memory and deletes the older dive Altitude: • Operational from sea level to 14,000 feet (4,270 meters) elevation •...
  • Page 113 SPECIFICATIONS (CONTINUED) Operating Temperature: • Out of the water - between 20 °F and 140 °F (-6 and 60 °C). • In the water - between 28 °F and 95 °F (-2 and 35 °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 unit and its battery with body heat before diving.

  • Page 114: 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 115: Inspection/ Service Record

    INSPECTION / SERVICE RECORD Serial Number: ______________________________________________________ Firmware Revision: ______________________________________________________ Date of Purchase: ______________________________________________________ Purchased from: _____________________________________________________ Below to be filled in by the Authorized TUSA Dealer: Date Service Performed Dealer / Technician...

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