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1.    UDI 28    User Manual    Restricted Distribution    Copy number  Customer lead number    Protected by patents no  6125080  6130859  6272072  in the US and in other countries    Version  1 3 41 dubyNovember 2014       Dear valued customer  if you find any typo or need any clarification  please send us an email with the  relevant information  info utc co il      4er          UTC gP UTC Ltd   Henwotaores centen Omer Industrial Park  Omer 84965  Israel          Form  UTC0002 Date 12 11 14    List of Changes    Open High priority Bugs                                                        Date Description Change Comment and page  12 11 14   Shut down algorithm Power off screen 15  12 11 14   SOS transmit Transmitting limit 28  Approved by  Title  Signature  Date   12 11 14                      yaaa SS SS SS  Disclaimers    LIABILITY DISCLAIMER  As is true of every device of diving equipment  underwater navigation systems and other underwater  equipment  the Underwater Digital Interface      UDI 28     abilities are not limitless  There are certain  limitations and restrictions of which you must be aware and certain precautions you must take when  using the UDI 28     Please read carefully all warnings in this document and disclaimers in each specific  chapter of the user manual     The UDI 28    is a computation hardware device combined with software applications that implements a  digital compass  depth measurements  navigation or tracking after acoustical signals  text messag
2.   if enabled   the message is automatically displayed     The received message identifies  the message sender   Only if the message is an SOS        The depth of the diver sending the  MSG FROM   message is also displayed in the Brad 15 21  message  Boat above you     In the example on the right  the   sender is Brad              Click Enter to turn off the sound  signal and automatically transmit  an acknowledgement signal to the  sender  After a short while  the  UDI 28    returns to the dive info  display     27    Navigation to a target   UDI 28    can be used to track an SOS beacon or a Homing beacon  A homing beacon transmits a  homing signal from the boat unit on a specific dedicated frequency  An SOS beacon transmits a homing  signal on a specific frequency  received on all networks used with UDI 28     Navigation using the UDI 28    can be done only while the diver or beacon is moving in relation to each  other  In other words  the UDI 28    diver  the beacon  or both must be moving  since the navigation  beacon relies on the Doppler Effect     Navigation method for tracking   Correct navigation as you dive showing the adjusted direction of the target beacon on the UDI 28   Choose a random initial direction to start diving  and then adjust as you go        x    1  Starting location of diver 3  Beacon location  2  Course adjustments             To enter Navigation mode   e From the UDI 28    Main menu  select Navigation and press Enter   To exit the Navigation mode an
3.   users or all users and press Enter   5  Armi  This will be the user to whom you sei    send a message by default     39    Transmission power  UDI 28    boat unit has the ability to adjust the transmission power  This feature enables the user to  select from 3 transmission power levels    e Low power   e Med power   e High power       TRANS POWER  1 Low power    2 Med power    3 High power             Working with low power level increases the battery lifetime while high power level shorten battery  lifetime   This feature also serves for next update to identify out of range capabilities     Select a power level and press Enter    UDI 28 Boat unit setup  Use the UDI 28    Boat unit Setup menu options to set the time  ring volume  and backlight duration on  the UDI 28    boat unit                 Clock   Use this option to set the time and date    1  Select a time unit  CLOCK SETUP   2  Use the Up Down buttons to  set the appropriate value  11   3  Press Enter to move to the 25 03 2014  next time unit on the list    4  Repeat     5  When you have set the year  value  press Enter to return to  the UDI 28    boat unit  Setup menu     AUDIO    Use this option to select an audio alert volume  The Audio alerts sound to get your attention   There are five levels of alert     e Med High  e Med   e Low   e   Off       AUDIO  Select a ring volume and press A  Enter 1 High  2 Med High  3 Med             40    An external siren and flashing light can also be connected to the unit exter
4.  Ensure that you have properly installed the UDI28 MANAGER software to be able to use this  function        To activate the connection to the PC  you must enable this option on the UDI 28  See page  16     13       Using the UDI 28  Turning UDI 28    On and Off    To turn the UDI 28    on   1  Press and hold the Enter button for about 5 seconds  The UTC Proprietary screen opens    If pushing the Enter button for a short time  a message on the screen will appear mentioning    the need for a longer push    NOTE  The UTC Proprietary screen contains a disclaimer  Clicking on the Enter button signifies that  you accept responsibility for use of the UDI 28  and that you accept the terms of the disclaimer   If you do not agree  please do not dive with the UDI 28              2  Press the Enter button again  The current settings screen opens   3  Press the Enter button again  The setup main menu opens  After a few seconds  the dive info   displays   Standby mode     e The UDI 28    unit goes into Standby mode after 10 minutes of inactivity on the surface    e The UDI 28    unit goes from Standby to    Off    after 1 hour of inactivity on the surface    e When in Standby mode  the UDI 28    unit instantly returns to use upon contact with water   or when a button is pushed for 2 seconds                    To turn UDI 28    off  POWER OFF  i __Press and hold the Enter button for about 6 seconds  Yes  lt 4   Formatted  Numbered   Level  1   Numbering Style  1  2  3   2  Press Yes button 
5.  No      Start at  1   Alignment  Left   Aligned at  0 63 cm    3 _ The UDI 28    turns off  Indent at  1 27 em             A    WARNING  Power cannot be turned off during a dive        Scrolling the menus  To scroll through the menu options  press the Up or Down buttons     To select an option  press the Enter button     14       UDI 28    main menu    The main UDI 28    menu allows you to access UDI 28    functions  The main menu flowchart is shown  below           1  Messages    2  Navigation    3  Compass    4  Dive Info       Use of the various functions is described in detail as follows   e Setup     see page 15   Dive Info     see page 21   Messages     see page 24   Navigation     see page 26   Compass     see page 23    15    Setting up the UDI 28       Use the Setup menu to set up the UDI 28    for the following features     PC Connection     Connect to a PC for use with the UDI28 MANAGER software   Network Setup     Set network for communication with buddy    Trans  Power      Set the transmission power of the UDI 28    units    UDI 28    Setup     Set UDI 28    parameters     clock  audio  led  units  etc   Main     Back to the Main menu     The Setup menu flowchart is shown below                  1  PC    Connection    2  Network  Setup    3  Trans   power    4  UDI Setup    1  From the Dive Info display  double click of the Enter button will open the Main menu   2  Use the Up Down buttons to scroll to Setup   3  Press Enter to choose the selection     To exit th
6.  be received by any device that  belongs to any SYSTEM in the operation range  Only devices that contain same table  tag as the SOS sender  will be able to receive full information  i e  NET and name of  user           To enter the Message menu   e From the Main menu  select Messages and press Enter     To exit the Messages menu and return to the Main menu  select Main  and press Enter     Sending a message  The UDI 28    unit can send any message from the preset text messages to other UDI 28    users     To send a text message   1  In the Messages menu  select  MESSAGES  New Message  and then click 5  Main    Enter   1  New Message    2  User to Send             2  Inthe Message list  choose a MESSAGES  message by scrolling with the  Up Down buttons  3 Are you OK   Click Enter           3  Inthe Messages menu  User MESSAGES  to Send is selected  5  Main    Click Enter  1  New Message             36       4  Inthe Send To menu  choose  SEND TO  a user by scrolling with the  Up Down buttons  2  Bob  Click Enter           5  Inthe Messages menu  Send  MESSAGES    is selected  1  New Message    2  User to Send             6  Click Enter  The message is  sent  You are automatically  returned to the Main menu     Viewing last message   1  Inthe Messages menu  MESSAGES  select Last Msg Rev  Click 3  Send  Enter  The last message 4  Last Msa R  received is shown  and   a 9 e  identifies the sender and 5  Main  network used    2  Use the Up Down    buttons to scroll the last  five me
7.  customizations and settings you have done will be erased  and UDI 28 will turn on with the original  factory settings     32       Base  boat  unit    The boat unit is an optional component of the UDI 28    system  It is used for text message  communication with the underwater divers  and its homing capabilities allow divers to navigate their  way back to the boat  In addition  pending to sea conditions  the Boat unit can send transmissions by  using its Active Antenna up to 2000 meters     The boat unit is shown below        1  OLED display  glass protector  2  Up and Down scroll buttons  3  Enter button  4  Alarm light  5  Antenna connector  6  Network selection buttons and lights  7  Power charge connector  8  USB connector  9  Active Antenna    33    Active Antenna    UDI 28    boat unit uses state of art acoustical antenna  This antenna is ACTIVE by means of electronics  and materials that support better gain  low noise  digital signal formats  enhanced matching to  underwater environment which results better communication to main boat unit    Please ensure that the active antenna is used properly  Do not use the antenna for any other application  except with the UDI 28    Boat unit  This antenna also serves for other systems  It is critical to hook the  antenna with another metal cable  not the communication cable  to support its weight     Functions of UDI 28     The UDI 28    boat unit contains the following functions   e Electronic compass  e Message sending receivi
8.  each UDI 28    device and boat unit has the same Table Tag value    The Table Tag value is displayed in the About UDI screen     OPERATION  RANGE AND CONFLICT   UTC provides communication means by using different configurations  Please note that a SYSTEM that  generates two Networks  i e   NET 1 and 2  includes at a minimum  two U28 wrist units or one wrist  U28 unit and a boat units  Each U28 is capable to receive signals from up to 1000m  depending on sea  and environmental conditions   Therefore  it is critical to properly define the lists of users and messages  so two different SYSTEMS will not intersect or coincide  In order to eliminate such event  all U28 that  belong to a SYSTEM must use the same table tag value  It is advised to check if other SYSTEM already  exist in the same diving area  If by mistake  in the same area  i e  a radius of 1000meter   two  SYSTEMS operate  then there is a chance that mistaken messages  wrong message that belong to other  system or characters that have no meaning  will be received by the end user     License to use the Software    Notwithstanding anything herein to the contrary  the purchaser and or user of the UDI 28    system shall  not obtain any intellectual property right in any the UDI 28    system or any part thereof  other than the  limited right to use it  The purchaser and or user of the UDI 28    system shall not have  and shall not  acquire  in any way  any intellectual property right in the UDI 28    system  The UDI 28   
9.  system shall  not be deemed to have been produced as work for hire and any intellectual property right with respect  thereto shall remain exclusively with UTC  For the purpose hereof  intellectual property includes  inter  alia  any property in and rights under copyright  patents  conceptual solutions and inventions  whether  patentable or not   circuit layout rights  design rights  designs  database rights  trade names   trademarks  service marks  methodologies  ideas  processes  methods  tools and know how  and or any  other types of intellectual property rights  The purchaser and or user of the UDI 28    system may not  and shall not permit  abet or aid others to translate  reverse engineer  decompile  disassemble  update  or modify all or any part of the UDI 28    system        Contents    Introduction re  Safety    104109  Before every dive   10409  UDI 28    unit       Unit Description     Using the quick connector   Charging the UDI 28  Connecting the UDI 28    to the PC     Using the UDI 28  xcsiciccncncensstenessvoes  Turning UDI 28    On and Off    Scrolling the menus  UDI 28    main menu        Setting up the UDI 28       Bottom timer      PC Connection  Network Setup     Transmission power    UDI 28    Setup    Clock  AUDIO SETUP                                                            About UDI 28     Revert to factory settings     Using the Bottom Timer    Surface display  Underwater display  Timer and reviewing additional data  Abnormal conditions   Low batt
10. AMAGES     Underwater operations are inherently dangerous  and proper safety procedures demand that you never  rely solely on just the UDI 28    or any other single instrument  method or mechanism for human  safety or the safety of property     BATTERIES DISCLAIMER   Lithium Ion Batteries can catch on fire  The UDI 28    uses Lithium Ion batteries  therefore it should  NOT be left unattended while being charged as THEY CAN CATCH ON FIRE  Proper precautions should  be taken before charging Lithium ion batteries such as having a fire extinguisher ready and placing the  batteries in a fire safe container        THE UDI 28    IS NOT A TOY AND SHOULD BE HANDLED WITH GREAT CARE        Lithium Polymer Charging  Handling  Safety Information    Charging    Lithium Polymer and Lithium Ion batteries have specific charging requirements and ONLY the chargers  rated for these cells may be used  The best charger for the UDI 28    is provided in the pack that you  purchased  Other chargers may alter the settings and can damage cells or cause a fire due to over   voltage charging of cells  We recommend that you use only the charger that was provided with the  UDI 28     Lithium Polymer Lithium Ion cells are a tremendous advance in battery technology for electronic devices   However  due to the chemistry of lithium cells  there is a possibility of fire if charging is not properly  done  It is unavoidable due to the nature of lithium itself  This is no different from many things we use  in dail
11. ation and reliable computation  The UDI 28   version  was derived from the celebrated UDI 14    while taking into consideration years of experience  feedback  from users  field measurements and specific requirements by professional organizations  This version  supports extended number of messages  two large networks  state of the art error corrections code that  increases communication reliability  extended range  without extending the power  for communication   high capacity batteries  seamless connection process to other systems  for example Passive Acoustical  Diving Radar   OLED  enhanced compass  new acoustical antenna with improved performances  support  for different languages and more  The company is grateful to the so many users and organizations that  contributed for this version     The system consists of the UDI 28    diving unit  an optional UDI 28    PRO boat unit with an active  antenna  and the UDI28 MANAGER PC software  Each item can be purchase separately     The UDI 28    contains the following functions   e Text messages communication device  e SOS signal transmission and reception  e Navigation unit and homing device  e Dive Information  e Compass    The UDI28 MANAGER PC software can be used in conjunction with only the UDI 28    to be used to  update text message and names  users  lists and groups and to update the firmware     The UDI 28    text messaging system links divers through transmission of pre set messages with ease  and reliability  Depending 
12. away  negative numbers  from the target   10  Depth indicator  present diver depth     SOS Signals  Unlike other UDI 28    signals  SOS signals are activated across all network channels  and have a longer  range than ordinary communications signals     In the event of an emergency  you can activate your SOS signal by pressing the red H  Help  button on  your UDI 28    ferseveratsecendstwice  An SOS signal is sent to all UDI 28    and boat unit users in the    OC IE    2                 EMERGENCY  HELP  BUTTON       Other UDI 28    users can eanthen heme n ane _navigate to your location using the Navigation feature __      Formatted  Not Highlight       oftheir units  ER    If you receive an SOS signal  your UDI 28    unit sounds an audible signal  and the SOS message is  automatically displayed     The SOS message identifies the    user sending the SOS  the network   and the depth of the sender  SOS DETECTED       In the example on the right  the User 1  sender is User 1  at a depth of 32    meters  Depth  32 m             Click Enter to turn off the audible   signal  UDI 28    displays the   Navigation Mode screen    Navigate to the diver in distress as described on page 26     Remote homing    UDI 28    contains the ability to send a remote homing signal to the boat unit    The remote homing signal takes the form of a message that cannot be modified or deleted from the   message list    To activate the remote homing    1  Inthe Message menu  select  Remote Homing from the l
13. d Buddy numbers  and a network        NOTE  You and your buddy must be properly defined on your UDI 28    and your buddy   s UDI 28     respectively  and you must both be on the same network to be able to communicate using the    UDI 28        Select Net to define a network  to use  and press Enter     Select a network from 1 or 2   and press Enter        NETWORK SETTING    4  Setup    Net    2  User    i          ay Z  m  o     O  o   a            Net 1  2  Net 2  Select User to define the user NETWORK SETTING  name number for the UDI 28    INE    and press Enter           3  Buddy  Select a User  named or USER  numbered  from the 28 users    1  User 1    and press Enter     3  Jen  Select Buddy to define your NETWORK SETTING  buddy number and press  Enter  2  User   3  Buddy   4  Setup  Select a User  named or BUDDY  numbered  from up to 28 aJ  individual users  boat  or all en  users and press Enter   This will be your default for 5  Armin    sending a message to     2  Brad                         Transmission power  UDI 28    has the ability to adjust the transmission power  This feature enables the diver to select from  3 transmission power levels    e     Low power   e Med power   e High power    Working with low power level increases the battery lifetime while high power level shorten battery  lifetime    The diver is advised to maintain a low or medium level except in extreme cases where it is important to  send communication for long range  This feature also serves 
14. d return to the Main menu  select Main  and press Enter     Navigation mode    Navigation is used to dive to a homing beacon  or to a unit transmitting an SOS signal to provide  assistance        1  From the Navigation menu  NAVIGATION  select SOS track to track an  SOS beacon  or Homing 1  SOS track    track to track a Homing 2  Homing track                   beacon  3  Mask Homing  2  Press Enter   3  The Navigation display  opens  13 25  TRACK 10 5m  LOCK  42         Main             28    Using the Navigation display  The display shows the track to your target  Keep an eye on the track to navigate to your target  You  should dive in a slight zigzag direction to allow for more accurate navigation towards your target     The navigation display is explained below                               QS  lt      13  7  TRACK 10 5m   LOCK  42 gt            8     Main              D  1  Beacon direction  relative to your 6  Ascent bar     shows you the limits of your  heading   Will appear in the first time ascent rate   only if the Doppler value  see 9   is  greater or equal 4    2  Swim direction  your heading   7  Start     restart tracking  This is useful if  3  Time  you suddenly loose the beacon   4  Track     current track direction  8  Doppler value bar     shows that you are    approaching  getting closer to  the target   5  Lock     the course you need to follow  9  Doppler value   shows how quickly you are  to arrive at the beacon  approaching  positive numbers  or moving  
15. depth 15 4 25 C  max 32 0 dive time  124     UDI28          3  When you enable Mask Homing   a small M is shown in the lower right  corner of the display     A    Transmitting a distress signal when the UDI is on the surface is limited to 10 minutes        Care and maintenance  UDI 28    requires very little care or maintenance     After every dive  wash and wipe down the UDI 28    and make sure that the contacts are dry prior to  connecting the UDI 28    to the charger or the PC     Do not use a water jet or pressure from hose to clean the UDI 28  to prevent damage to the UDI 28     mechanism     Periodically the UDI 28    may need to be serviced at an authorized laboratory for calibration and  battery replacement  at least once a year   Consult the UDI 28    webpage for information or with your  dealer     The UDI 28    display protective sticker may get scratched and can be replaced  The UDI 28    can be  removed from its housing for display housing replacement as shown in the diagram below     Remove the cover by unscrewing the tops from the two hinge screws  and pulling the hinges out of the  housing  This frees the housing and allows you to remove it from the UDI 28    unit   You can then pop the protective cover out  and replace it with a new cover        Revert to factory setting    In case you need to revert to the original UDI 28 factory settings  press the Up  Down and Enter  buttons simultaneously  when the UDI 28    is off   Wait for the UDI 28 to turn on     All
16. e Setup menu and return to the Main menu  select Main  and press Enter     16    Bottom timer       WARNING  the UDI 28    works as bottom timer  it only measures the time and depth and doesn   t  function as a diving computer that calculates any Nitrogen levels  User must be aware that in  this mode of operation  there are no alerts that are related to the diving        PC Connection    Use the PC Connection option to connect UDI 28    to your PC and use it with the UDI28 MANAGER  application  For information see the UDI28 MANAGER Software user manual        WARNING  Do not enter the water with the UDI 28    when the    PC connection    is active  This will       damage your UDI 28        NOTE  When the PC connection has not been used for 2 minutes  it becomes disabled to prevent any  damage to the UDI 28           To use PC Connection    Connect the quick connector to the UDI 28   Connect the USB cable to the quick connector   Connect the USB cable to the PC computer    On the UDI 28    Setup menu  select PC Connection   Select Enable press PC Connection  Enter to enable the  PC Connection  A PC  indication appears at 2  Disable  the bottom right  corner of the display  while the UDI 28    is  connected to the PC        Ce GING                A    NOTE  Communication with the UDI 28    is done using the UDI28 MANAGER software provided with  your system  For information see the UDI28 MANAGER Software user manual        17    Network Setup    Use this option to select User an
17. ery   Empty battery during dive     Using the COMPaSS        cccccceeeerees  Sending and receiving text messages  Sending a message        Viewing last message    Receiving a message    Navigation to a target     Navigation mode     Using the Navigation display        SOS Signals  Remote homing  Remote SOS      Mask Homing     Care and maintenance  Revert to factory setting      Base  boat  unit   Active Antenna   Charging the UDI 28    boat unit   Connecting the UDI 28    boat unit to the PC      Turning UDI 28    boat unit On and Off     Scrolling the menus  UDI 28    Boat unit main menu     Sending and receiving text messages     Sending a message                   Viewing last message  Receiving a message    Receiving SOS Signals     Remote SOS     Using the Compass      Transmit homing 4038   Setting up the UDI 28 Boat Unit   403837  Buddy Select             Transmission power    UDI 28 Boat unit setup   Clock        AUDIO       LED Control                About UDI 28  Care and maintenance    Revert to factory setting        jN  Introduction    Congratulations on your purchase of the UTC     Underwater Digital Interface 28 System    UDI 28    is a device that contains several functions used for diver safety  communication and  computation  Throughout this manual we will use the term UDI 28    instead of Underwater Digital  Interface  UDI 28  System  UDI 28    is a device that contains several functions that were implemented  to increase safety  enable underwater communic
18. es   gauge mode computations and alert signal communication  The UDI 28    combines all these  applications in one unit     The UDI 28    is not a primary device but only an aid to send and receive text messages  to be used as  an aid in navigation or tracking after an acoustical signal  as an aid for digital compass and as an aid to  send and receive emergency signals  The UDI 28    is not a device of life support gear  As such  it  is unlikely that you will be hurt by the instrument itself any more than you might be hurt by any other  object of similar shape  size and weight  The main danger in the use of UDI 28    over reliance on the  information it provides  As an electronic system it might fail spontaneously and unexpectedly due to  component  batteries or software failure  As an acoustical device based system  it can fail at any time  due to changing environmental  acoustic  conditions or internal damages of the acoustical antenna     By purchasing or using the UDI 28    system  it is agreed and understood that in no event will  Underwater Technologies Center Ltd  UTC  or any of their representatives be held liable for any  personal injuries or death or damages to property resulting from its operation  or for any other damages  whether direct  indirect  or consequential even if UTC has been advised of such actual or potential  damages  UTC products are authorized for use only by certified  professional divers who have  maintained a sufficient level of knowledge and hig
19. for next update to identify out of range  capabilities     Select a power level and press Enter       TRANS POWER    1 Low power    2 Med power    3 High power             UDI 28    Setup  Use the UDI 28    Setup menu options to set the time  volume  led and units on your UDI 28     Clock  Use this option to set the time and date   CLOCK SETUP       1  Press Enter to select a time  unit  14   2  Use the Up Down buttons to 25 03 2014  set the appropriate value    3  Press Enter to move to the  next time unit on the list    4  Repeat    5  When you have set the year  value  press Enter to return to  the UDI 28    Setup menu              AUDIO SETUP   Use this option to select an audio alert volume  Audio alerts sound when a message is received  when  the battery meets low level    There are five levels of alert        e Med High  e Med  e Low  e Off  AUDIO  Select a ring level and press Enter    1 High  3 Med             19    LED Control    Use this option to turn on or off the Green LED control which allows the LED on the UDI 28    to blink  when there is an audible alarm or when a signal is received        LED CONTROL    ered as or Disable and press 1  Enable   2  Disable  The Default  Enable             Contrast    Use this option to select a contrast level for the OLED display     The contrast interval ranges from 1  very little contrast  to 7  high contrast         CONTRAST  Use the Up Down buttons to    define a contrast value and press  Enter  Make sure there are no  st
20. h skill proficiency through a combination of formal  training  ongoing study and experience  The user must understand that the product is liable to sudden  failure     Underwater operations are inherently dangerous  and proper safety procedures demand that you never  rely solely on just the UDI 28    or any other single instrument  method or mechanism for human  safety or the safety of property        REMEMBER   YOU ARE RESPONSIBLE FOR YOUR OWN SAFETY        BOTTOM TIMER COMPUTER DISCLAIMER   As you probably know and it is true for every device of diving equipment  and other underwater  equipment  the Underwater Digital Interface      UDI 28     abilities are not limitless  There are certain  limitations and restrictions of which you must be aware and certain precautions you must take when  using the UDI 28    as a Bottom Timer instrument  Please read carefully all warnings in this chapter and  this disclaimer     The UDI 28    is a computation hardware device combined with software   SOFTWARE   applications   The Bottom Timer is implemented with software and sensors  such as digital depth sensor and related  electronic components      The UDI 28    is not a primary device but only an aid to calculate along the dive the time and depth   The UDI 28    is not a device of life support gear and should not be used as a device for life  support     Bottom Timer   Time and depth are presented on the screen only for assistance  thus the diver should  take into considerations that he 
21. he Compass   The UDI 28    boat unit contains an electronic compass display  This compass is accurate within  2     The electronic compass accuracy is influenced by the presence nearby metal bodies and may be biased    dramatically     To open the compass display   e From the Main menu  select Compass                       13 25 j  MAIN  1  Magnetic North 3  Time  2  Swim direction 4  Your heading  Degrees     To exit the compass display   e Select Main and click Enter     38    The boat unit has the ability to transmit homing signal to a UDI 28    user  By selecting this option  the  UDI i428    wrist unit user receives a homing signal that allows the user to track and locate the UDI  boat unit     The UDI 1428    wrist unit user can also use mask homing option  see page 36         MAIN  2 Compass    3 Trans  homing    4 Setup             Setting up the UDI 28 Boat Unit    Use the Setup menu to set up the UDI 28 Boat Unit for the following features   e Buddy Select  e Trans  Power     select between 3 power levels  e UDI 28    Setup   Set parameters     clock  audio  led     The Setup menu flowchart is shown below        1  Buddy  Select  2  Trans   power  3  UDI Setup            To enter the Setup menu   1  From the Main menu  use the Up Down buttons to scroll to Setup   2  Press Enter     To exit the Setup menu and return to the Main menu  select Main  and press Enter                 Buddy Select  Select a User  named or BUDDY SELECT  numbered  from the 28 individual Balen
22. ist MESSAGES  by scrolling with the  Up Down buttons  and then  click Enter        30  Remote Homing             2  Click Send  The message is  sent    Remote SOS    UDI 28    contains the ability to send a remote SOS signal to another user    Failure to respond to the request within 15 seconds by the user receiving a remote SOS causes the UDI   28    to start sending SOS signal to the entire network  You will receive an SOS signal and navigate to  the diver in distress    The remote SOS signal takes the form of a message that cannot be modified or deleted from the  message list     To activate the remote SOS   1  Inthe Message menu  select MESSAGES  Remote SOS from the list by  scrolling with the Up down 29  Remote SOS  buttons  and then click Enter                 Click Send  The message is sent    Mask Homing   You can temporarily mask the navigation homing beacon to prevent your UDI 28    from sounding a  homing alarm when a homing signal is transmitted  This allows you temporarily disregard the homing  signal until the time you need it to return to the boat unit        NOTE  Masking the homing beacon does not mask any SOS beacons that may be activated during a  dive        30       To mask a homing beacon                                NAVIGATION  1  From the Navigation menu   select Mask Homing and 1  SOS track  press Enter  2  Homing track  3  Mask Homing  MASK HOMING  2  Inthe Mask Homing menu   select Enable to mask the 1  Enable  beacon and press Enter  2  Disable  
23. mportant to safely dive with batteries that will  enable you to complete the dive     COMPASS DISCLAIMER    The UDI 28 contains 3 D Magneto Impedance sensor  Combined with software  it generates the North  magnetic direction  Common sense must be used at all times when navigating  therefore it should only  be considered as aids to navigation  The UTC    policy of continuous improvement may result in changes  to product specification without prior notice  It is advised to visit www utc digital com from time to time  and to download updates for new algorithm and compensation factors for this sensor    This compass is intended for professional dive use only  It should not be used for industrial or  professional measurements  The compass  accuracy is highly dependent on the environment  for  example  soft or hard metal will highly alter the real measurement  Thus  it is advised not to use the  compass in the vicinity of any metals  UTC does not assume any responsibility for losses or claims by  third parties that might arise through the use of this compass     PRESET LISTS DISCLAIMER   TABLE TAG    Please ensure that prior to any dive  all UDI 28    devices and boat units  in the same network  include  the same user list and messages list  Text messaging communications will only function properly if those  lists are identical    To ensure that the lists are identical  each UDI 28    has a Table Tag value  which is a unique code for  each specific UDI 28    lists    Make sure that
24. n button   once to see the compass   Press the Down button  again to review a Timer   1  Presents hour   2  Presents minutes   3  Presents seconds    The initial screen shows   START  button to begin  counting from ZERO   Selecting  STOP  will hold  the Time counter   Selecting  RESUME  will    continue the Time counter     Selecting  CLEAR  will end    with a confirmation screen     Selecting OK will set the  time counter back to Zero   Selecting  CANCEL  will  return to the last counter  screen                             13 25 i  25 5m  13 258    25 5m  Or    0 0  0     13 25   25 5m  1 32 10             23       Press the DOWN button to  return to the compass  screen     Are you sure                       1 32 10    13 25  25 5m       24    Abnormal conditions       WARNING  The UDI 28    may turn itself off during the dive        Low battery    When the battery contains less than 3 hours charge  UDI 28    will display a warning message and  sound an alert tone  Click Enter to return to the dive info display     When the battery contains less than 2 hours charge  UDI 28    will display an additional warning  message and sound an alert tone  Click Enter to return to the main display   When the battery contains less than 1 hours charge  UDI 28    will display yet another warning message    and sound an alert tone  Click Enter to return to the main display     Each transmission is shortening the battery tome of operation        WARNING  In all cases of low battery alert  sta
25. n see page 4       ABOUT UDI  19 36 25 03 2014  S N  B28 111007  Version   UDI28_BLowB_14  Tables Tag  1C56AF             41    Care and maintenance  The UDI 28    boat unit requires very little care or maintenance     After every dive  wash the antenna and antenna cable  Wipe down the UDI 28    boat unit and make  sure that the connectors are well covered  using caps  and are dry prior to connecting the UDI 28    to  the charger or the PC     Do not use a water jet or pressure from hose to clean the UDI 28    boat unit  to prevent damage to the  UDI 28    boat unit mechanism     Periodically the UDI 28    boat unit may need to be serviced at an authorized laboratory for calibration  and battery replacement  at least once a year   Consult the UDI 28    webpage for information or your  dealer     Revert to factory setting     In case you would like to revert to the original UDI 28    boat unit factory settings  turn on the UDI28  boat unit by pressing the Up  Down and Enter buttons simultaneously  the message    set default     appears on the screen  All customizations and settings you have done will be erased  and UDI28 boat  unit will turn on with the original factory settings     42    
26. nal connectors     LED Control    Use this option to define the Alarm LED light intensity  In day time     you may want higher intensity  than in the night  The default value is 50  intensity     Display Contrast    Use this option to select a contrast level for the OLED display     The contrast interval ranges from 1  very little contrast  to 7  high contrast         CONTRAST  Use the Up Down buttons to    define a contrast value and press  Enter  Make sure there are no  strips seen on the screen     Contrast  7             Units    Use this option to select Metric units  meters  degrees C  or Imperial units  Feet  degrees Fahrenheit  as  your unit of measurement        UNITS    Select Imperial or Metric and press n  Enter  All units displayed on the 1  Imperial    UDI 28    boat unit will now 2  Metric  conform to the unit type chosen                 NOTE  The temperature displays according to your units selection     When you select Feet  Fahrenheit  degrees are shown  when you select Meters  centigrade degrees are shown           About UDI 28    Use this option to view the UDI 28    boat unit serial number and software version installed  Use this  information when contacting UTC about your UDI 28 Boat unit     In addition the About UDI screen presents the table tag value which is a unique code for each specific  UDI 14    list of users and messages  Make sure that every UDI 14    device and boat unit  in the same  network  has the same Table Tag value  For more informatio
27. nal factory settings     21     ER   Using the Bottom Timer    The dive Info display contains a current and maximum depth indicator  a battery indicator and compass     From the dive Info display  you can   e Press the Up button to return to main menu   e Press the Down button once to get compass  press another one and a Timer will be  activated   e Press the Enter button twice to go to the Main menu     The dive info display is different when the UDI 28    is on the surface  and when the UDI 28    is in an  underwater environment     Surface display  On the surface  the dive Info display shows the following                            Formatted  Font   Default  Arial  Complex Script Font  Arial               Formatted  Left      Formatted  Font   Default  Arial  Complex Script Font  Arial            Net   2  Depth 0 0   Formatted  Font   Default  Arial  Complex Script Font  Arial       Dmax    0 0 User 1  lt                               Formatted  Font   Default  Arial  Complex Script Font  Arial                   1  Current Depth and maximum 3  Bat a  depth compassF   Formatted  Font   Default  Arial  Complex Script Font  Arial  2  Network  amp  Buddy indicator 4  azimuth compasUser names    Underwater display  In an Underwater environment  the window  2  is changed to the dive time counter     22          si    Depth 0 0 Dive 2    Dmax  0 0    Time        6s   UDI28       Timer and reviewing additional data    Press the Up button to  jump to the main menu     Press the Dow
28. ng  e Communication with 2 Networks   NET    e Homing beacon  Use of these functions is explained below     Charging the UDI 28    boat unit   UDI 28    uses a rechargeable internal battery  You can use the boat unit running on a battery  or  connected to a power supply    Connect the power adapter to the power connector on the UDI 28    boat unit to recharge the battery or  to use the unit                 NOTE  Read Lithium Polymer Charging  Handling  Safety Informationttthit A Formatted  Font  Italic  Complex Script Font  Italic       Handing  Sate information on page 3           WARNING  The UDI 28    boat unit is a completely sealed unit and meets IP67 standard  It may stop  functioning if opened  The warranty will be void if the unit is disassembled or the seal is  broken        Connecting the UDI 28    boat unit to the PC    You can connect the UDI 28    boat unit to the PC to perform data transfers  messages list  users list    using the UDI28 MANAGER application     To connect the UDI 28    boat unit to the PC   Connect the USB cable to the computer        A    NOTE  Ensure that you have properly installed the UDI28 MANAGER software to be able to use this  function        34    Turning UDI 28    boat unit On and Off  To turn the UDI 28    boat unit on   1  Press and hold the Enter button for about 5 seconds  The UTC Proprietary screen opens  the  buzzer is heard and the LED is blinking   2  Press the Enter button again  The current settings screen opens   Press the En
29. o activity  the UDI 28    turns off     The UDI 28    unit contains a water sensor  When the UDI 28    unit that has been turned on or is in  standby comes in contact with water  the bottom timer becomes active     A dive is considered if the UDI 28    is at a depth of 2 meters for at least 10 seconds     Before every dive  To ensure your safe use of the UDI 28    before every dive  you must check   e UDI 28    battery is charged  e The preset messages list and the users list  names  in the dive group are the same  This  means that the same table tag is same in all devices in the dive group   e The network used between you and your buddy or group   e Check communications by sending a message to your buddy and receiving a message back     10       UDI 28    unit    Unit Description  The UDI 28    unit consists of the following                1  Antenna 4  OLED display  plastic protector  2  Up scroll button 5  Attachment buckle   3  Down scroll button 6  Enter button    7  Emergency  SOS  button    The UDI 28    contains the following functions   e Bottom timer   Electronic compass   Message sending receiving   Homing device   Emergency signaling    Use of these functions is explained below     11    Using the quick connector  A quick connector is used connect the UDI 28    unit to a power supply or to a PC        1  Quick Connector 2  Connector bracket on UDI 28    Charging the UDI 28  UDI 28    uses a rechargeable internal Li battery  This battery can be recharged only with 
30. on environmental conditions  it is possible to receive signals from up to 1000  meters     Upon receiving a message signal  the UDI 28    unit sounds an audible alert and lights up to show the  message  if these features were enabled      The SOS signal can be activated by a diver in distress  or remotely by any diver who suspects that his  buddy is in distress  Upon activation of an SOS signal  the UDI 28    transmits information required to  locate the SOS sender    Each UDI 28    includes a homing device to help the diver locate other divers or the dive boat     The UDI 28    can be worn on the lower arm or attached to the Buoyancy Compensator  BC      The UDI 28    permits a diver to communicate with any other diver in the network without distractions  or potential discomforts     Safety    Read and understand this user guide prior to using the UDI 28  We strongly recommend that prior to  using in in real environment you will gain experience with the device     Pay close attention to all cautions and warnings listed  Make sure that you fully  understand the use  displays and limitations of the UDI 28    prior to diving  Improper  use of this device may cause a diver to commit actions that could lead to serious injury  or death     The UDI 28    has a battery saving mode  After the UDI 28    unit is turned on   e If no button is pressed on the UDI 28    or 10 minutes elapsed  the UDI 28    goes to standby   and the screen displays the word Standby   e After 60 minutes of n
31. rips seen on the screen     Contrast  7       Units  Use this option to select Metric units  meters  degrees C  or Imperial units  Feet  degrees and  Fahrenheit  as your unit of measurement    UNITS    Select Imperial or Metric and press    Enter  All units displayed on the 1  Imperial    UDI 28    will now conform to the 2  Metric  unit type chosen                    A    NOTE  The temperature displays according to your units selection     When you select Feet  Fahrenheit  degrees are shown  when you select Meters  centigrade degrees are shown           About UDI 28    Use this option to view the UDI 28    serial number and software version installed  Use this information  when contacting UTC about your UDI 28    In addition the About UDI screen presents the table tag value  which is a unique code for each specific  UDI 28    list of users and messages  Make sure that every UDI 28    device and boat unit  in the same  network  has the same Table Tag value  For more information see page 4        ABOUT UDI  19 36 25 03 2014  S N  28 111007  Version   UDI28_LowB_14  Tables Tag  1C56AF             20    Revert to factory settings     In case you would like to revert to the original UDI 28    factory settings  press the Up  Down and  Enter buttons simultaneously to start the UDI 28    on  Wait for the UDI 28 to turn on and for the  message    set default    appears on the screen  All customizations and settings you have done will be  erased  and UDI 28 will turn on with the origi
32. rt ascent immediately  according to safe diving practice   and recharge the UDI 28    after you reach the surface        Empty battery during dive             If the battery status becomes     empty during a dive  the battery depth 15 4 25  icon starts to flash in addition to mx 32 0 dvetine  the UDI 28    sounding an alert   tone  This indicates that the UDI  124     UDI28  28    can continue to work for a             half hour with 1 transmission every  4 minutes     Using the Compass    The electronic compass display can be used to navigate and orient yourself underwater  This compass is  accurate within  2  from the magnetic North    The electronic compass accuracy is influenced by the presence nearby metal bodies and may be biased  dramatically     eGare anamaintenanee on page 29 for information on periodic recalibration of          To see the compass display   e From the Main menu  select Compass     25         Formatted  Font  Italic  Complex Script Font  Italic          13 25 E  25 5m        MAIN _                 1  Magnetic North 4  Depth  2  Heading direction 5 Back to Main menu  3  Time 6 Your heading  Degrees     To exit the compass display   e Select Main and click Enter     Sending and receiving text messages    Messages are pre set using the PC connection and UDI28 MANAGER software  To modify the pre set  message list  please review the UDI28 MANAGER manual     You can send messages to your buddy or other UDI 28    users on the same network using the Send  Mes
33. sage function     To enter the Message menu   e From the Main menu  select Messages and press Enter   To exit the Messages menu and return to the Main menu  select Main  and press Enter     Sending a message   The UDI 28    unit can send one of up to 28 user preset text messages to other UDI 28    users and to   the boat unit    To send a text message    1  In the Messages menu  select  MESSAGES  New Message  and then click 5  Main    Enter   1  New Message    2  User to Send             2  In the Message list  choose a MESSAGES  message by scrolling with the  Up Down buttons    Click Enter     3  Boat above you               26       3  Inthe Messages menu  User  MESSAGES  to Send is selected     f 5  Main  Click Enter  1  New Message          4  Inthe Send To menu  choose  SEND TO  a user by scrolling with the  Up Down buttons  2  Bob  Click Enter           5  Inthe Messages menu  Send  MESSAGES  is selected  1  New Message    6  Click Enter  The message is 2 User w Sone  sent  You are automatically    returned to the Main menu              Viewing last message   1  In the Messages menu  select MESSAGES  Last Msg Rcv    2  Click Enter  The last message 3 ae R  received is shown  and  identifies the sender and 5  Main  network used    3  Use the Up Down buttons to    scroll the last five messages  received                 Receiving a message    When you receive a text message from your buddy or another UDI 28    user  your UDI 28    sounds an  audible signal and blinks light
34. she must use a diving computer or diving tables     The main danger in the use of UDI 28    is over reliance on the information provided by it  As lies in  an electronic system it might fail spontaneously and unexpectedly due to component  batteries  incorrect  charging or software failure  In addition the UDI 28    also contains acoustical functions  hence  as an  acoustical device  it can fail at any time due to changing environmental  acoustic  conditions     THE SPECIFICATIONS AND INFORMATION REGARDING THE COMPUTERIZED UNIT IN THIS MANUAL  ARE SUBJECT TO CHANGE WITHOUT NOTICE  ALL STATEMENTS  INFORMATION  AND  RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED  WITHOUT WARRANTY OF ANY KIND  EXPRESS OR IMPLIED  USERS MUST TAKE FULL RESPONSIBILITY  FOR THEIR APPLICATION OF ANY PRODUCT     NOTWITHSTANDING ANY OTHER WARRANTY HEREIN  ALL DOCUMENT FILES AND SOFTWARE OF  UTC ARE PROVIDED    AS IS    WITH ALL FAULTS  UTC DISCLAIMS ALL WARRANTIES  EXPRESSED OR  IMPLIED  INCLUDING  WITHOUT LIMITATION  THOSE OF MERCHANTABILITY  FITNESS FOR A  PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING  USAGE   OR TRADE PRACTICE  IN NO EVENT SHALL UTC BE LIABLE FOR ANY DIRECT OR INDIRECT  SPECIAL   CONSEQUENTIAL  OR INCIDENTAL DAMAGES  INJURY  DEATH  INCLUDING  WITHOUT LIMITATION   LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS  COMPUTERIZED UNIT  EVEN IF UTC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH D
35. ssages received                 Receiving a message    When you receive a text message from another UDI 28    user  your UDI 28    unit sounds an audible  signal  and the message is automatically displayed     The received message identifies  the message sender and the  receiving time        MSG FROM  Brad 15 21  Are you OK              Click Enter to turn off the audible signal and return to the main display   Receiving SOS Signals    Unlike other UDI 28    signals  SOS signals are activated across all network channels  and have a longer  range than ordinary communications signals     37    If you receive an SOS signal  your UDI 28    boat unit sounds an audible signal  and the SOS message is  automatically displayed     The SOS message identifies the  user sending the SOS  the network   SOS DETECTED  and the depth of the sender        User 6 15 21  In the example on the right  the Net   1  Depth   21m    sender is user 6  at a depth of 32  meters   Click Enter to turn off the audible signal              Remote SOS    The boat unit contains the ability to send a remote SOS signal to a UDI 28    user   Failure to respond within 15 seconds by the user receiving a remote SOS causes the receiving user UDI   28    to start sending SOS     To activate the remote SOS   In the Message menu  select MESSAGES  Remote SOS or Remote Homing   from the list by scrolling with the 14  Remote SOS  Up Down buttons  and then click  Enter                 Click Send  The message is sent   Using t
36. ter button again  The main menu opens     To turn UDI 28    boat unit off   Press and hold the Enter button for about 5 seconds  The UDI 28    turns off     Scrolling the menus    To scroll through the menu options  press the Up or Down buttons   To select an option  press the Enter button     UDI 28    Boat unit main menu  The main UDI 28    menu allows you to access UDI 28    functions  The main menu flowchart is shown    below   gs  1  Messages i   X      2  Compass          The various functions are described in detail as follows   e Messages     see page 33  e Compass     see page 36  e Transmit homing     see page 3737  e Setup     see page 3737    Sending and receiving text messages    Messages are pre set using the PC connection and UDI 28    software  To modify the pre set message  list  See the UDI28 MANAGER user manual        WARNING  When transmitting messages  the antenna cable must be plugged into the boat unit        35       A       NOTE  The Boat unit sends and receives messages to from the active network only   When the Boat unit is configured to  NET1  it does not send and receive messages from   NET2  and vice versa  In the case that two groups of divers are located in the same area and they share one Boat  unit  then we advise that the Boat unit user will change NETS button from time to time to  control both NTES   for example send message  are you OK   and receive  OK  from each diver  in NET1 and NET2      When SOS signal is transmitted  the signal will
37. the UDI 28     charger              NOTE  Read Lithium Polymer Charging  Handling  Safety InformationLithiamPetymer Chatging    Formatted  Font  Italic  Complex Script Font  Italic       Handing SatehtTntermatien on page 3           WARNING  The UDI 28    is a completely sealed unit  It may stop functioning if opened  The  warranty will be void if the unit is disassembled or the seal is broken        Ensure that the UDI 28    is fully charged before your dive   Charge the battery for 12 hours prior to the first time you use the UDI 28     To charge the UDI 28    Ensure that your hands  the UDI 28    and the charger are dry    Connect the quick adapter to the UDI 28      Connect the power charger to the quick connector    Connect the power charger to a power supply  The green LED will turn on   The charge is complete when the green light on the quick connector turns off     Tice Ne    12       NOTE  A steady or flashing red LED indicates a problem with the charger or the battery  Disconnect  the charger and repeat steps 2 to 4  If this does not resolve the problem  return the unit for  service       Connecting the UDI 28    to the PC  You can connect the UDI 28    to the PC to perform data transfers  using the UDI28 MANAGER  application  For information see UDI28 MANAGER Software User Manual   To connect the UDI 28    to the PC   1  Connect the quick connector to the UDI 28  2  Connect the USB cable to the quick connector   3  Connect the USB cable to the computer        NOTE 
38. y life     knives  kitchen cleaners  automobiles  for a few examples     which are inherently  dangerous  but which can be used very safely by adhering to simple rules and precautions     Care should be taken to charge on a fireproof surface  such as brick or in a hot  warm  environment    Do not charge the UDI 28    when lying on an ignitable surface  If you left the UDI 28    in a warm  environment or open to sun light  DO NOT CHARGE IT  wait until it will be cooled to a temperature of  less than 30 centigrade  Do not charge batteries near flammable items or liquids   Keep a dry fire extinguisher nearby   or a large bucket of dry sand  which is a cheap and effective  extinguisher  Do not charge inside an automobile  especially while driving    The UDI 28    should NEVER be left unattended while charging     Handling Cautions     New cells may have a high initial charge  and care must always be taken to insure that the cap of the  UDI 28    is completely sealed  DO NOT REPLACE BATTERIES  If the batteries performances are low   please send it to the authorized dealer for repair or replacement     Charging cycles    The Batteries should work in good condition for approximately 500 charging cycles  We strongly  recommend that every year you ll send the UDI 28    for batteries test in order to measure their stability  and charging cycles  Please remember  every charging cycle shorten the batteries lifetime and there is  an ageing process with the Lithium chemistry  thus  it is i
    
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