LIMITED TWO-YEAR WARRANTY For details, refer to the Product Warranty Registration Card provided. COPYRIGHT NOTICE This manual is copyrighted, all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine readable form without prior consent in writing from Tabata USA, Inc. and Tabata Corp. Ltd. / 2002 Design. ZEN Owner's Manual, Doc. No.
CONTENTS WARRANTY, NOTICES, DECOMPRESSION MODEL.....................................................................................................2 NOTICE - STORAGE AND INITIAL ACTIVATION............................................................................................................7 FULL LCD..........................................................................................................................................................................8 FEATURES AND DISPLAYS............
CONTENTS (continued) SURFACE MODE.......................................................................................................................................................38 NORM SURF MAIN...............................................................................................................................................40 NORM SURF ALT..................................................................................................................................................
CONTENTS (continued) FLY MODE..................................................................................................................................................................59 DESAT MODE............................................................................................................................................................60 NORM/GAUG LOG MODE...................................................................................................................................
CONTENTS (continued) FREE DIVE OPERATING MODE.....................................................................................................................................99 FREE SURFACE MAIN AND ALT.............................................................................................................................100 FREE COUNTDOWN TIMER (CDT)........................................................................................................................102 SET FREE CDT..............
NOTICE STORAGE and INITIAL ACTIVATION ZEN watch style dive computers are placed in a Deep Sleep mode prior to being shipped from the factory. The intent is to extend storage life of the Battery for up to 7 years, before the unit is initially placed in service. In this mode, Date and Time are updated as they normally would be. However, they are not displayed. Upon waking the ZEN up, the correct Date and USA Pacific Time will be displayed and it will be ready to operate with full functions.
c d e b a f u g t h i s r j q p k o n l m FULL LCD 8 Components: a. Mode (M) Button b. Icon - Log Mode c. NiBG (Nitrogen Bar Graph) d. Icon - operating mode Surface Interval Plan NDC Time No Deco Time Remaining Deco Total Ascent Time e. O2BG (O2 Bar Graph) f. Select (S) Button g. Icon - Stop Time Required Elapsed Dive Time h. Icon - Time of Day i. Icon - Ascend j. Light (L) Button k. Icon - Depth/Max Depth l. ASC (Ascent Rate Indicator) m. Icon - Low Battery n.
FEATURES AND DISPLAYS 9
INTRODUCTION Welcome to TUSA and thank you for choosing the ZEN ! It is extremely important that you read this Owner's Manual in sequence and understand it completely before attempting to use the ZEN as a dive computer. 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. CONTROL BUTTONS The ZEN features four Control Buttons that allow you to select mode options and access specific information.
OPERATING MODE STRUCTURE Unless it is operating in Dive Computer mode, the ZEN will be ON in the default WATCH MAIN TIME (home time) mode (Fig. 1), like a standard WATCH, until the Mode is changed. The M button is used to access other modes that include Alternate Time, Countdown Timer, Chronograph (stop watch/lap timer), and Daily Alarm. It is also used to revert to the Local Default Time display and access dive computer modes.
OPERATION AS A DIVE COMPUTER The ZEN features 3 Dive Computer (DC) Operating Modes, NORM (Fig. 2A) which is used for Air and Nitrox dives, GAUG (Fig. 2B) used for dives in which Nitrogen-Oxygen calculations are not performed, and FREE (Fig. 2C) used for activities that do not use SCUBA. 2A Entering Settings and Plan Mode are only available in NORM SURF Mode which also allows access to Fly, Desat, Log, and History Modes. 2B GAUG Mode only allows access to Fly, Log, and History Modes.
FREE Dive Mode has its own set of Alarms which emit 3 short beeps either 1 or 3 times which cannot be acknowledged or set Off. The Audible will not be active if the Alarm is Set OFF (a group A setting). 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.
3 short beeps (which cannot be disabled) are emitted for the following • NORM/GAUG Ascent Rate is 51 to 60 FPM (15.1 to 18 MPM) when deeper than 60 FT (18 M), or 26 to 30 FPM (7.5 to 9 MPM) at 60 FT (18 M) and shallower. • FREE Dive Elapsed Dive Time Alarm (3 beeps every 30 seconds if set On). • FREE Dive Depth Alarms 1/2/3 (set sequentially deeper) - each 3 beeps 3 times. • FREE Dive NiBG Alarm (Caution zone, 4 segments) - 3 beeps 3 times.
NOTE: Extensive use of the Backlight reduces estimated Battery life. Also, the Backlight does not operate during a Low Battery Condition or when the ZEN is connected to a PC. POWER SUPPLY The ZEN uses (1) 3 volt CR2430 Lithium Battery. Used as a Dive Computer, the battery should operate normally for 1 year or 300 dive hours if 2 dives are conducted during each dive period. The ZEN checks battery voltage every 2 minutes on the surface. • If voltage of the ZEN decreases to the Warning level (2.
PC INTERFACE Interface with a PC is accomplished by connecting the ZEN to a PC USB Port using a special USB Interface Cable available as an optional accessory. The same Cable is used for Upload and Download. The software program is on a CD, also an accessory, together with a USB Driver. The program's Help serves as the user manual and can be printed for personal use.
WATCH FEATURES AND DISPLAYS 17
LOCAL DEFAULT TIME Watch Main Time (Fig. 6) is the current Time at your home location and is normally selected as the Local Default Time. The normal Watch screen sequence accessed with momentary presses (< 2 sec each time) of the M (upper/left) button is Fig. 6 - MAIN TIME Main Time >> Alternate Time >> Countdown Timer >> Chronograph >> Daily Alarm Watch Alternate Time (Fig. 7), identified by the graphic ALt, set by Hour Differential, is the current Time at a remote travel location.
While viewing any of the Watch Mode displays, depressing the M button for 2 seconds, or if no button is pressed for 2 minutes, operation will revert to the Watch Default Time screen selected. MAIN TIME, information includes (Fig. 8): > Nitrogen Bar Graph, if any after NORM/FREE dives. > O2 Bar Graph, if any after NORM Nitrox dives. > Daily Alarm icon (clock), if it is set On (Fig. 8a) > Day of the Week graphic MON (or TUE, WED, THU, FRI, SAT, SUN), or the graphic WET (if the unit is wet).
WATCH ALT DISPLAY, information includes (Fig. 9): > Altitude graphic (EL2 to EL7), if above 3000 feet (915 meters), blank if below. > Temperature with degrees icon and graphic F (or C) > Date (Month.Day or Day.Month). Fig. 9 - WATCH ALT • After 5 seconds, operation will revert to the Watch Default Time screen. • Pressing and releasing the A button momentarily (< 2 sec) will revert to the Watch Default Time screen. • Pressing the L button will activate the Backlight.
Set Date Format While viewing the Watch Default Time screen, depressing the A and S buttons simultaneously for 2 seconds will access the Set Date Format screen displaying the graphic dAtE and the Set Point M - D or D - M flashing (Fig. 10). > M - D means Month will be displayed to the left of Day. > D - M means Day will be displayed to the left of Month. • Pressing and releasing the S button momentarily (< 2 sec) will toggle between M - D and D - M.
Set Time Upon access, the Set Time screen displays the graphic SET with the clock icon and the Time of Day (hr:min) with the Hour Set Point flashing (Fig. 12). Fig. 12 - SET TIME • Depressing the S button while the Hour Set Point is flashing will scroll upward through the Set Points in 1 Hour increments at a rate of 8 per second. • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Set Points one at a time.
• Depressing the S button while the Year Set Point is flashing will scroll upward through the Set Points in 1 Year increments at a rate of 8 per second from 2008 to 2051 (with leap year corrections). • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Year Set Points one at a time. • Pressing and releasing the A button momentarily (< 2 sec) will save the Year Set Point and the Month digits will flash, regardless of their location on the display.
ALTERNATE TIME • Pressing and releasing the M button momentarily (< 2 sec) while the Watch Default Time screen is displayed will access the Watch Alternate Time screen. Information provided includes (Fig. 14): > Nitrogen Bar Graph, if any after NORM/FREE dives. > O2 Bar Graph, if any after NORM Nitrox dives. > Day of the Week graphic MON (or TUE, WED, THU, FRI, SAT, SUN). > Clock icon, if the Daily Alarm is set On. > Time of Day (hr:min:sec) with AM (or PM) icon.
SET WATCH ALT TIME • ALT TIME can be set OFF, or to an Hour based numeric time Differential ranging from + 1 through +23 through - 23 through -1 (hours). • Once the Differential is selected and saved, values of ALT Time will be based upon the Main Time Set Points plus/ minus the Differential. Information displayed includes: > Set Point graphic OFF (Fig. 15A) or numeric (Fig. 15B), flashing. > Graphics SEt and ALt. Fig.
WATCH CDT (COUNTDOWN TIMER) Pressing and releasing the M button momentarily 2 times (< 2 sec each time) while the Watch Default Time screen is displayed will access the Watch CDT status screen, displaying the remaining Countdown Time (hr:min) if running (Fig. 16A), or OFF flashing and the previously set Countdown Time if the set Countdown started and has ended, or OFF (solid) and 0:00 if no time was previously set (Fig. 16B). Fig.
Set Watch CDT Upon access, the Set CDT screen displays the graphics CDT and SEt and the CDT (hr:min) with clock icon, the Hour Set Point flashing (Fig. 17A). • Depressing the S button will scroll upward through the Hour Set Points in 1 hour increments at a rate of 8 per second. • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the set Points one at a time.
Fig. 18 - CHRONOGRAPH Fig. 19 - LAP RECALL 28 CHRONOGRAPH (Stop Watch/Lap Timer) • Pressing and releasing the M button momentarily 3 times (< 2 sec each time) while the Watch Default Time screen is displayed will access the Chronograph displaying the elapsed time if previously started or 0:00:00.00 (hr:min:sec.1/100th sec), flashing. • Pressing and releasing the S button momentarily (< 2 sec) will Start the Timer which will begin counting up from 0:00:00.00 to 9:59:59.99 (hr:min:sec.
• Depressing the A button for 2 seconds will Stop the Timer and Reset the Time to 0:00:00.00 (flashing). • Pressing and releasing the M button momentarily (< 2 sec) will access the Daily Alarm Status screen. • Depressing the M button for 2 seconds will revert to the Watch Default Time screen. While the Chrono is running, it will remain on the screen until a button operation is performed. If another screen is accessed, it will then continue to run in the background.
• Depressing the A and S buttons simultaneously for 2 seconds will access Set Daily Alarm. • Depressing the M button for 2 seconds will revert to the Watch Default Time screen. • If no button is pressed during a period of 2 minutes, operation will revert to the Watch Default Time screen. SET DAILY ALARM, information provided includes (Fig. 21): > Graphics AL and SEt with clock (alarm) icon. > Alarm Time previously set (hr:min) with the Hour Set Point flashing.
DIVE COMPUTER FEATURES AND DISPLAYS 31
BAR GRAPHS The ZEN features 3 Bar Graphs >> NiBG, O2BG, and ASC. NiBG (Nitrogen Loading Bar Graph) The NiBG (Fig. 22a) represents tissue loading of nitrogen, showing your relative no decompression or decompression status. As your depth and elapsed dive time increase, segments will add to the NiBG, and as you ascend to shallower depths, the segments will recede, indicating that additional no decompression time is allowed for multilevel diving.
a Oxygen Bar Graph (O2BG) The O2BG (Fig. 23a) 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 decreases, it will begin to recede, indicating that additional exposure is allowed for that dive and 24 hour period. b Fig. 23 - O2BG & ASC Ascent Rate Indicator (ASC) The ASC (Fig.
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 misunderstanding that could result in error. b a Fig. 24 - DIVE MAIN Depth Current Depth is displayed on the Main screens (Fig. 24a) with the FT (or M) icon from 0 to 330 FT (99.9 M) in increments of 1 FT (.1 M).
When Times are calculated projections such as NDC and Elapsed Dive Time (Fig. 26a/b), the colon is solid (non blinking). a FREE Dive Mode displays Times in minute:second format. Temperature and Date Temperature and Date (Fig. 27a/b) can be viewed by accessing an Alternate Display while on the surface in Watch mode. b Fig. 26 - TIMES (DIVE) The positions of Month and Day are determined by the setting entered for Date Format, see page 21.
WARNINGS AND SAFETY RECOMMENDATIONS • It should not be considered that the capabilities built into the ZEN 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. • The oxygen features of the ZEN are intended for use by recreational divers trained for Nitrox diving by an instructor certified by a recognized training agency to teach diving with Nitrox.
DIVE COMPUTER SURFACE MODES 37
DIVE COMPUTER (DC) OPERATING MODES The ZEN features 3 selectable DC Operating Modes • NORM >> for Normal Air or Nitrox SCUBA dives • GAUG >> for SCUBA dives with no Nitrogen/Oxygen calculations. • FREE >> for dives with no SCUBA SURFACE MODE Depressing the M button for 2 seconds while the Watch Default Time screen is displayed will access the NORM, GAUG, or FREE Surface Main screen (whichever was selected).
At any time while operating in Surface Modes, the ZEN will enter Dive Mode upon descent to 5 FT (1.5 M). • During the 2 hour pre dive surface period, if the M button is pressed/released to access Watch Mode, the DC Surface Mode must again be accessed prior to the first dive of a series (if Wet Activation is set OFF). • When Wet Activation is set ON, the Wet Contacts will activate the selected Dive Mode regardless of what Mode the ZEN is operating in at the time of the descent. or GAU Fig.
NORM SURF MAIN, information provided includes (Fig. 30): > 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 > Battery icon if a Low Battery Condition exists > NiBG, if any after a NORM or FREE dive > O2BG, if any after a NORM Nitrox dive M S A L Fig.
NORM SURF ALT, information includes (Fig. 31): > Altitude graphic (EL2 to EL7), if above 3000 feet (915 meters), blank if below. > Temperature with degrees icon and graphic F (or C). > Time of Day (hr:min) with clock and AM (or PM) icons. • After 5 seconds, or pressing/releasing the A button (< 2 sec) will revert to the NORM Surface Main screen. • Pressing the L button will activate the Backlight. Fig.
SETTING FO2 FOR NITROX DIVES For each value of FO2, the MOD (Max Operating Depth) that can be achieved for the PO2 Alarm limit previously set will be displayed. When the FO2 50% Default is set On and FO2 Gas 1 is set for a numerical value, 10 minutes on the surface after that dive, the FO2 for Gas 1 will be displayed as 50 and further dives will be calculated based on 50% O2 for oxygen calculations and 21% O2 for Nitrogen calculations (79% Nitrogen) unless the FO2 for Gas 1 is set before the dive.
Internally, the ZEN 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). Once FO2 Gas 1 is set for a numerical value (21 to 50%) and a dive is made, the AIR option is disabled until 24 hours elapse after the last dive. The AIR option will not be displayed in Set FO2 Gas 1 until a full 24 hour Surface Interval has elapsed.
SET F GROUP (FO2) Sequence Set F >> FO2 Gas 1 >> FO2 Gas 2 >> FO2 50% Default. Fig. 32 - SET F > Depressing the A and S buttons simultaneously for 2 seconds while the NORM (or GAUG) Surface Main screen is displayed will access the Set F screen (Fig. 32). > Pressing and releasing the A button momentarily (< 2 sec) while SET F is displayed will access Set FO2 Gas 1. Set FO2 Gas 1, information includes (Fig.
• 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 FO2 Gas 2. • Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the SET F screen.
• Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set FO2 50% Default. • Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the Set F screen. • Depressing he 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. Fig. 35 - SET FO2 DEFAULT Set FO2 50% Default information includes (Fig.
SET A GROUP Sequence Set A >> Audible >> Depth >> EDT >> NiBG >> DTR >> PO2. > Depressing the A and S buttons simultaneously for 4 seconds while the NORM (or GAUG) Surface Main screen is displayed will access the Set A screen (Fig. 36). > Pressing and releasing the A button momentarily (< 2 sec) while SET A is displayed will access Set Audible Alarm. Fig. 36 - SET A SET AUDIBLE ALARM This option allows the Audible Alarm to be disabled.
• Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the Set A screen. • 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. Set > > > Depth Alarm information includes (Fig. 38): Graphic DEP Symbols MAX and FT (or M) Set Point value, flashing, with MAX and FT (or M) icons.
SET EDT ALARM information includes (Fig. 39): > Graphic EDT (meaning Elapsed Dive Time). > Set Point value (hr:min), flashing, with wave/clock icons. • Depressing the S button will scroll upward through the Set Points from 0:10 to 3:00 (hr:min) in 5 minute (:05) increments at a rate of 8 per second. • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Set Points one at a time.
Set NiBG Alarm information includes (Fig. 40): > Graphic NBG (meaning Nitrogen Bar Graph). > NiBG Set Point (segments), flashing. Fig. 40 - SET NiBG ALARM Wave over Clock over Profile icon represents Dive Time Remaining • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step through the Set Point from all 5 segments (Deco) to 1 one at a time. • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set DTR 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. • Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the Set A screen.
SET U GROUP (UTILITIES) Sequence SET U >> Wet Activation >> Units >> Deep Stop >> Safety Stop >> Conservative Factor >> Backlight Duration >> Sample Rate. Fig. 43 - SET U > 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. 43). > Pressing and releasing the A button momentarily (< 2 sec) while Set U is displayed will access Set Wet Activation. Set Wet Activation information includes (Fig.
Set Units information includes (Fig. 45): > 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. • Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the Set U screen.
Set Safety Stop information includes (Fig. 47): > Graphic SAF (meaning Safety Stop). > Set Point ON or OFF, flashing, with STOP icon. Fig. 47 - SET SAFETY STOP • Pressing and releasing the S button momentarily (< 2 sec) will toggle the Set Point between OFF and ON. • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and access Set Conservative Factor. • Depressing the A and S buttons simultaneously for 2 seconds will save the setting and revert to the Set U screen.
• 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. Set Backlight Duration information includes (Fig. 49): > Graphics BL and dur (meaning Backlight Duration).
Set Sampling Rate information includes (Fig. 50): > Graphic SR (meaning Sampling Rate). > Set Point (seconds value), flashing, with clock icon and graphic SEC. Fig. 50 - SET SAMPLING • 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). • Pressing and releasing the A button momentarily (< 2 sec) will save the setting and revert to the Set U screen.
• 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: The Serial Number and Firmware Revision will be requested in the event that you contact TUSA regarding the ZEN. Enter them in the Records section provided in the back of this Manual.
Plan Lead-in information includes (Fig. 52): > Graphic FO2 with wave/clock/profile icons. > PO2 Alarm Set Point and graphic PO2, if FO2 is set for Nitrox, blank if set for Air. > Tank 1 icon indicating that FO2 is for Gas (mix) 1. > FO2 Set Point for Gas 1, Air or 21 to 50. • After dives, press and release the A button momentarily (< 2 sec) to access the Time to Fly screen, then again to access the Dsat screen.
Plan Depth/Time information includes (Fig. 53A/B: > NiBG (4 No Deco segments), or O2BG (4 segments), indicating which (Nitrogen or Oxygen) is in control of calculations based on previous dives. > Dive Time (hr:min) allowed for the Depth displayed. > Max Depth allowed for the PO2 Alarm value set with MAX and FT (or M) icons and graphic - PO2. > Tank 1 icon indicating Gas (mix) 1. > Plan Depth with FT (or M) icon.
• Pressing and releasing the A button momentarily 2 times (< 2 sec each time) while viewing the NORM Plan Lead-in screen, or the S button1 time (< 2 sec) while viewing the GAUG Surface Main screen, will access Fly Mode. NORM SURF MAIN >> PLAN >> FLY GAUG SURF MAIN >> FLY Fig. 54 - TIME TO FLY Time to Fly information includes (Fig. 54): > Graphic FLY. > Countdown Time (hr:min) with clock icon.
When the Countdown reaches 0:00, which will generally occur prior to the Fly countdown reaching 0:00, the Dsat screen remains in the sequence of accessible NORM screens displaying 0:00 until the Fly counter turns Dive Computer operations Off 24 hours after a last dive. > The SAT screen is not displayed after a Violation Dive. > Desaturation requiring Times greater than 24 hours will display 23: - - . > In the event that Time to Desaturate still remains at the end of 24 hours, the added time will be zeroed.
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). Log information is retained until over written by another dive. Battery removal will not affect the Log data stored for viewing. After exceeding 24 dives, data from the most recent dive completed will be recorded in the Log and the oldest dive's data deleted. Dives will be numbered 1 to 24 starting at #1 each time a new series of dives begins.
Log Preview information includes (Fig. 56): > 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. > # icon and dive number (1 to 24) for that series. • Pressing and releasing the S button momentarily (< 2 sec) will access that dive's Log Data 1 screen.
> Max Depth with MAX and FT (or M) icons. > ASC representing max Ascent Rate recorded for 4 seconds. • 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. • Pressing the L button will activate the Backlight.
HISTORY MODE History Mode displays information for up to 999 NORM and/ or GAUG Dives, 9999 Dive Hours, and the Maximum Depth achieved. History 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 Watch Default Time, NORM Surface Main, or GAUG Surface Main screen. Fig. 59 - HISTORY 1 History 1 information includes (Fig.
• 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. • Pressing the L button 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.
NORM DIVE MODES 67
NO DECO DIVE TIME REMAINING (NDC) The ZEN 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. The rates each of these compartments absorb and release Nitrogen is mathematically modeled and compared against a maximum allowable Nitrogen level.
a OXYGEN ACCUMULATION If FO2 was set for a numerical value (Nitrox), the O2BG (Fig. 62a) 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. High O2 is described later. ASCENT RATE INDICATOR (ASC) The ASC shows how fast you are ascending.
NORM NO DECOMPRESSION DIVE MODE When the Wet Activation feature is set ON, the ZEN will enter the NORM No Decompression Dive Mode any time you descend to 5 FT (1.5 M) for 5 seconds. When the Wet Activation feature is set OFF, the ZEN will not enter Dive Mode upon descent unless it is operating in one of the NORM Dive Computer modes (menus) at that time. Modes such as Surface Mode, Plan, Fly, etc. NORM No Deco Main information includes (Fig.
NORM No Deco ALT 1 information includes (Fig. 65) > 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 • Press/release the A button to access ALT 2. • Operation will revert to the Main after 5 seconds if A is not pressed. NORM No Deco ALT 2 information includes (Fig. 66) > Graphic FO2 > PO2 (ATA) with graphic PO2 > Tank icon representing the Gas selected (1 or 2) > FO2 set for the Gas selected (1 or 2) Fig.
No Deco Deep Stop On any No Deco dive in which Depth exceeds 80 FT (24 M), a Deep Stop Preview screen (Fig. 67) can be accessed that will display the graphic DS (meaning Deep Stop) and a recommended Stop Depth calculated to be 1/2 the Max Depth and a Stop Time of 02:00 (2 minutes) with a STOP icon. It will revert to the Main after 5 seconds. Fig. 67 - DS PREVIEW • The intent of this screen is to suggest that a Stop should be made as indicated to help reduce tissue nitrogen loading prior to final ascent.
Press and release the A button (< 2 seconds) to access the ALT 1 screen (Fig. 69A) that displays Elapsed Dive Time, press it again to view the ALT 2 screen (Fig. 69B) 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. 69C). When the countdown reaches 0:00, the No Deco Main will be displayed and the Deep Stop feature will be disabled for the remainder of that dive. Fig.
No Deco Safety Stop (Fig. 70) 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 Countdown Timer that counts down from 03:00 to 0:00 (min:sec). The Safety Stop will be displayed until the countdown times out, or you descend below 30 FT (9 M) during the countdown, or you surface during the countdown.
CAUTIONARY MODES 75
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. Deco Entry information includes (Fig.
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.
CONDITIONAL VIOLATION (CV) If you ascend shallower than the calculated Deco Ceiling Depth, the Audible Alarm will sound and no off gassing credit will be given, until you descend below the Ceiling 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. CV Main information includes (Fig.
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. This is a continuation of a Conditional Violation. DV1 Main information includes (Fig.
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. When the Deco Stop Depth indicates 50 FT (15 M), etc., you can ascend to those Stop Depths and continue decompressing. DV2 Main information includes (Fig.
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. Max Depth on the ALT screen will only indicate 3 dashes ( - - - ). Upon ascending above 330 FT (99.9 M), the Current Depth display will be restored, however, Max Depth will only display 3 dashes for the remainder of that dive.
VIOLATION GAUGE MODE (VGM) If calculations require a Deco Stop Depth greater than 70 FT (21 M), or if Deco is entered while operating in FREE Mode (described later), operation will enter Violation Gauge Mode (VGM) for the remainder of that dive and for 24 hours after surfacing. VGM turns the ZEN 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.
This condition is a Permanent Violation, and 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.
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. Fig. 79A - HIGH PO2 MAIN (during audible) alternate w/ PO2 • Press/release the S button to acknowledge/silence the alarm. > The graphic PO2 and Up Arrow icon will be displayed flashing on the Main screen (Fig.
a HIGH O2 The O2BG (Fig. 80Aa) 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 Arrow icon will be displayed flashing (Fig. 80B). Fig.
WARNINGS AND SAFETY RECOMMENDATIONS • The percentage of oxygen (FO2) in the Nitrox mix being used must be 'set before each nitrox dive', unless the FO2 50% Default feature is set OFF (a user setting). • Plan Mode provides predicted times for subsequent dives. Depending on cylinder size, breathing gas consumption, and oxygen accumulation, you may have less time available than indicated because of breathing gas quantity or other limitations.
SWITCHING GAS MIXES 87
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. > Access to Gas Switching screens can only be accomplished during the time that a NORM Dive Main screen is being displayed and cannot be performed during the time that an Alarm is sounding.
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. • Depress the M button for 2 seconds while viewing a Preview screen to Switch FO2 to that Gas. > Operation will revert to the NORM Main screen after 10 seconds of no further M button action. Fig.
GAS SWITCH ROUTINE NORM DIVE MAIN M 2 sec Switches from Gas 2 to Gas 1 (after 3 sec) GAS 1 PREVIEW M 2 sec M < 2 sec Switches from Gas 1 to Gas 2 (after 3 sec) M 2 sec GAS 2 PREVIEW M < 2 sec Back to NORM DIVE MAIN 90
NORM POST DIVE MODES 91
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 displayed. 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. The time at the surface (if less than 10 minutes) will not be added as Dive Time. NORM Surface Main information includes (Fig.
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. Operation will revert to the Watch Default Time screen. The NORM Surface Main screen can be then be accessed by depressing the M button 2 seconds. You will then have full access to other NORM DC surface modes (e.g., Plan, Fly, Sat, Log, Hist, Set, etc.). Fig.
UPLOADING SETTINGS AND DOWNLOADING DATA The ZEN 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 the special Interface Cable available as an optional accessory. A USB Driver is provided on the PC Interface CD, also available as an accessory. The Settings Upload portion of the program provided can be used to set/change the Main Time, Date, Set A group (Alarms), and Set U group (Utilities) using the same Interface System.
GAUGE OPERATING MODE 95
DIGITAL GAUGE MODE When Digital Gauge Mode (GAUG) is selected as the operating mode, the ZEN will operate as a Digital Depth Gauge/Timer without performing nitrogen and oxygen calculations. • To access Gauge mode while the Watch Default Time screen is displayed, press the M button 2 times (2 seconds each time), or while the NORM Surface Main screen is displayed, press the M button 1 time for 2 seconds.
• Press and release the A button momentarily (< 2 sec) to access Log, then again to access History. • Depress the A button for 2 seconds to the GAUG SURF ALT screen (Fig. 88 - Altitude, Temperature, Time of Day). • Depress the A and S buttons simultaneously for 2 seconds to access the Set menu (F >> A >> U). • Press and release the S button momentarily (< 2 sec) to access the Time to Fly screen, if a dive was conducted. • Press the L button to activate the Backlight. Fig.
Gauge Dive ALT information includes (Fig. 90) > 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 • The display will revert to the MAIN screen after 5 seconds or if the A button is pressed. • Press the L button to activate the Backlight. Fig. 90 - GAUG DIVE ALT As in NORM Dive Mode, if you descend deeper than the MOD (Max Operating Depth) of 330 FT (99.
FREE DIVE OPERATING MODE 99
FREE DIVE MODE When Free Dive Mode is selected as the operating mode, the ZEN 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 operating modes. • To access Free Dive Operating mode while viewing the Watch Default Time screen, press the M button 3 times (2 seconds each time), or while the Gauge Surface Main screen (no Gauge dive was made), press the M button 1 time for 2 seconds.
• Press and release the A button momentarily (< 2 sec) to access the Free Surface ALT 1 screen, then again ALT 2. • Depress the A button for 2 seconds to access the FREE CDT (Count Down Timer) Status screen. • 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. Free Surface ALT 1 information includes (Fig.
Free Surface ALT 2 information includes (Fig. 94) > Temperature with degrees icon and graphic F (or C) > Time of Day with clock and AM (or PM) icons > The display will revert to the Main after 5 seconds or if the A button is pressed/released. • Press the L button to activate the Backlight. Fig. 94 - FREE SURF ALT 2 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.
• Pressing and releasing the S button momentarily (< 2 sec) will toggle between ON and OFF. A toggle to ON will Start the CDT if a Time has been set. • Depressing the A and S buttons simultaneously for 2 seconds will access Set Free CDT. • Pressing and releasing the S button momentarily (< 2 sec) will revert to the Free Surface Main screen. • If the M button is pressed for 2 seconds or if no button is pressed during a period of 2 minutes, operation will revert to the Free Surface Main screen.
Set Free CDT Upon access, the Set CDT screen displays the graphics CDT and SEt and the CDT (min:sec) with clock icon, the Minute Set Point flashing (Fig. 96). Fig. 96 - SET FREE CDT Fig. 97 - FREE CDT SET 104 • Depressing the S button will scroll upward through the Minute Set Points in 1 minute increments at a rate of 8 per second. • Pressing and releasing the S button momentarily and repeatedly (< 2 sec each time) will step upward through the Set Points one at a time.
FREE DIVE EDT (ELAPSED DIVE TIME) ALARM The Free EDT Alarm is factory set for 30 seconds. When set ON, the Alarm will sound 3 short beeps and the graphic EDT and Time digits will flash every 30 seconds (Fig. 98). • Depress the A and S buttons simultaneously for 2 seconds while the Free Surface Main screen is displayed, to access Set Free EDT Alarm. 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. Fig.
FREE DIVE DEPTH ALARMS (DA) Free Dive mode features 3 Depth Alarms (DAs) that can be Set at progressively deeper Depths and turned OFF/ON. > If Alarm 1 is set OFF, then Alarms 2 and 3 will be disabled. > If Alarm 2 is set OFF, Alarm 3 will be disabled. Fig. 100 - FREE DEPTH ALARM 1 When each alarm Depth set is reached during a dive, 3 short beeps will sound 3 times and the graphic DA1 (DA2, DA3) and Depth digits will flash (Fig. 100).
• Pressing and releasing the A button momentarily (< 2 sec) will accept the ON/OFF setting, and if OFF is selected operation will revert to the Free Surface Main screen, or if ON is selected the Depth digits will flash allowing them to be set (Fig. 102). • Depressing and holding the S button will scroll upward through the Depth Set Points from 30 to 330 FT (10 to 100 M) in increments of 10 FT (1 M) at a rate of 8 Set Points per second until it is released.
Free Dive Main information includes (Fig. 103) > NiBG, if any Nitrogen remaining from NORM or FREE dives conducted within the previous 24 hours > NDC Time (hr:min) with wave/clock/profile icons > Temperature with degrees icon and graphic F (or C) > Elapsed Dive Time (min:sec) with wave/clock icons > Current Depth with FT (or M) icon Fig. 103 - FREE DIVE MAIN • Press and release the A button momentarily (< 2 sec) to access ALT 1 (Free CDT Status). • Press the L button will activate the Backlight.
Free Dive ALT 2 information includes (Fig. 105) > Time of Day with clock and AM (or PM) icons > Max Depth with MAX and FT (or M) icons > The display will revert to the Main after 5 seconds or if the A button is pressed/released. • Press the L button to activate the Backlight. FREE DIVE ALARMS Free Dive alarms sound 3 short beeps (1 or 3 times) as an indication that an event is occurring and as a reminder to view the display to identify an event. Fig.
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. 107), 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. Fig. 107 - FREE DEPTH AL 1 (DA2 & DA3 similar) If Ascent is made above a Free Depth Alarm Set Point and then a descent is made below it, the respective Alarm (DA) will reset and sound again.
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. 109). 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. In the event that Nitrogen loading increases to the Deco level, operation will enter Violation Gauge Mode for 24 hours. Fig.
ADDITIONAL INFORMATION PERTAINING TO FREE DIVE MODE Although breathing apparatus is not utilized for Free Dive activities, nitrogen tissue loading remains a factor. Nitrogen loading is calculated based upon a fixed FO2 of AIR.
REFERENCE 113
CARE AND CLEANING Protect your ZEN from shock, excessive temperatures, exposure to chemicals, and tampering. Protect the lens against scratches with an instrument lens protector. • Soak and rinse the ZEN 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. 111a), PC Interface Data Port (Fig. 111b), and Buttons are free of debris or obstructions.
BATTERY REPLACEMENT NOTE: The procedures that follow must be closely adhered to. Damage due to improper Battery replacement is not covered by the product's warranty. The Battery Compartment should only be opened in a dry and clean environment with extreme care taken to prevent the entrance of moisture or dust.
Fig. 112A - BATTERY HATCH REMOVAL (Tool) Fig. 112B - ALTERNATE HATCH REMOVAL Battery Removal • Locate the Battery Compartment on the back of the unit. • Rotate the Battery Hatch clockwise 10 degrees using the special Battery Hatch Tool provided (Fig. 112A), or by pushing the lower portion to the left while pushing the upper portion to the right using your fingers (Fig. 112B). • Lift the Hatch with O-ring up and away from the Housing. • Using care not to damage the Battery Contact (Fig.
• Remove the Battery Hatch O-ring and inspect it for any signs of deterioration or deformity. DO NOT use tools to remove the O-ring. • To ensure proper sealing, O-ring replacement is highly recommended each time a Battery is replaced. • Closely examine the Battery Hatch and Housing for any signs of damage that might prevent proper sealing. • Closely examine the inside of the Battery Compartment for any signs of corrosion indicating entrance of moisture into the unit. Fig.
NOTE: The Hatch O-ring must be a genuine TUSA part that can be purchased from an Authorized TUSA Dealer. Use of any other O-ring will void the warranty. Fig. 116A - HATCH INSTALLATION • 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. • Maintain the Battery Hatch securely in place and turn it counter clockwise 10 degrees using the Hatch tool (Fig.
ALTITUDE SENSING AND ADJUSTMENT Prior to the first dive of a series of repetitive dives, Altitude (i.e., Ambient Pressure) is measured upon activation of Dive Surface Mode and every 15 minutes until a dive is made or operation reverts to Watch mode after 2 hours. > While it is operating in Watch mode after a dive, measurements are taken every 15 minutes during the 24 hour period after surfacing. > Measurements are only taken when the unit is dry.
When the Conservative Factor feature is set ON, allowable dive times are calculated based upon the next higher 3,000 foot (915 meter) Altitude. All adjustments for Altitudes greater than 11,000 feet (3,355 meters) are then made to allowable dive times for 14,000 feet (4,270 meters). If the Conservative Factor is set ON while at Sea Level, calculations are based upon an Altitude of 6,000 feet. The ZEN will not function as a Dive Computer above 14,000 feet (4,270 meters).
PZ+ ALGORITHM >> NDLS (HR:MIN) AT ALTITUDE (IMPERIAL) Altitude (feet) Depth ( FT ) 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 0 to 3000 3001 to 4000 4001 to 5000 5001 to 6000 6001 to 7000 7001 to 8000 8001 to 9000 9001 to 10000 10001 to 11000 11001 to 12000 12001 to 13000 13001 to 14000 3:17 1:49 1:05 0:48 0:35 0:26 0:19 0:16 0:12 0:10 0:08 0:07 0:06 0:06 0:05 0:05 0:04 2:30 1:21 0:53 0:37 0:26 0:19 0:15 0:11 0:09 0:08 0:07 0:06 0:05 0:05 0:04 0:04 0:04 2:21 1:15 0:51 0:35 0
ERROR (RESET DURING A DIVE) If the ZEN shuts Off then turns On again for any reason during any Dive, the message ERR (Error) will be displayed with the Up Arrow icon and current Depth. If this occurs, it is highly recommended that you terminate the dive and begin a safe controlled ascent to the surface. ERROR WHILE DIVING Upon surfacing, and any time thereafter, when access to Dive Computer mode is attempted from Watch mode, only the graphic ERR will be displayed and operation will revert to Watch mode.
SPECIFICATIONS CAN BE USED AS • Watch • Air Computer • Nitrox Computer • Digital Depth Gauge/Timer • Free Dive Depth Gauge/Timer DIVE COMPUTER PERFORMANCE • Buhlmann ZHL-16c based Pelagic Z+ algorithm • No Deco limits closely follow PADI RDP • Decompression in agreement with Buhlmann ZHL-16c and French MN90 • No Deco Deep Stops - Morroni, Bennett • Deco Stops (not recommended) - Blatteau, Gerth, Gutvik • Altitude - Buhlmann, IANTD, RDP (Cross) • Altitude corrections and O2 limits based on NOAA tables WATC
SPECIFICATIONS (CONTINUED) • Set U Group (Utilities): • Wet Activation (On/Off) • Units of Measure (Imperial/Metric) • No Deco Deep Stop (On/Off) • No Deco Safety Stop (On/Off) • Conservative Factor (On/Off) • Backlight Duration (0, 5, 10 seconds) • Sampling Rate (2, 15, 30, 60 seconds) >> On >> Imperial >> Off >> Off >> Off >> 5 (sec) >> 30 (sec) • ZEN (Watch) Serial Number >> Factory set >> actual NORM No Deco Dive Displays: • Main - NiBG, O2BG, Dive Time Remaining, Elapsed Dive Ti
SPECIFICATIONS (CONTINUED) Digital GAUG Dive Displays: • Main (default) - graphic GAU, Elapsed Dive Time, Current Depth, ASC • ALT - Temperature, Time of Day (hr:min), Max Depth FREE Dive Displays: • Main (default) - Dive Time Remaining, Temperature, Elapsed Dive Time (min:sec), Current Depth • ALT 1 (CDT Status) - graphic CDT, setting (On/Off), Time remaining (min:sec) • ALT 2 - Time of Day (hr:min), Max Depth NUMERIC DISPLAYS: • Dive Number • Current Depth • Maximum Depth • Gas 1 FO2 Set Point • Gas 2 FO2
SPECIFICATIONS (CONTINUED) • Watch Countdown Timer • Free Countdown Timer • Chronograph • • 23:59 to 0:00 hr:min 59:59 to 0:00 min:sec 0:00:00.00 to 99:59:59.99 hr:min:sec.1/100 sec Out of Range (- - -) Violation Countdown Timer 1 minute 1 second 1/100 second => 330 FT (99.
SPECIFICATIONS (CONTINUED) OPERATIONAL PERFORMANCE Function: • Depth • Timers Accuracy: ±1% of full scale 1 second per day Dive Counter: • NORM/GAUG displays Dives #1 to 24, FREE displays #1 to 99 (0 if no dive made yet) • Resets to Dive #1, upon diving (after 24 hours with no dives) 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)
SPECIFICATIONS (CONTINUED) Battery Indicator: • Warning - icon on solid at 2.75 volts, Battery change recommended • Alarm - icon on flashing at 2.50 volts, change the Battery Dive Computer Mode Activation: • Manual - push button (recommended), required if Wet Activation is set OFF. • Automatic - by immersion in water (if set ON) • Cannot be manually activated deeper than 4 FT (1.2 M), if Wet Activation is set OFF.
RESPONSIBLE COMPUTER DIVING • Plan each dive, and dive your plan. The ZEN 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. • Do not plan any dive that exceeds your training or experience level. • Inspect your ZEN before every dive.
TUSA INTERNATIONAL CONTACTS Tabata USA, Inc 2380 Mira Mar Avenue Long Beach, CA 90815 Tel: 562-498-3708 Fax: 562-498-0415 www.tusa.com info@tusa.com Tabata Europe Corporation B.V. Den Brielstraat 2 B, 1055 RV Amsterdam, The Netherlands Tel: 31-(0)20 68 15 955 Fax: 31-(0)20 68 24 527 www.tusa.nl info@tusa.nl Tabata Australia PTY Ltd. 4D James Ruse Business Park, 6 Boundary Road Northmead, N.S.W. 2152 Australia Tel: 61-(0)2-9890-4555 Fax: 61-(0)2-9890-5222 www.tusa.com.
INSPECTION / SERVICE RECORD ZEN Serial Number: __________________________________________________ ZEN Firmware Revision: __________________________________________________ Date of Purchase: __________________________________________________ Purchased from: __________________________________________________ Below to be filled in by the Authorized TUSA Dealer: Date Service Performed Dealer/Technician 131
