dive computer manual - Underwater Dynamics
Contents
1. Total t ti Pressure of Oxygen PO a otal ascent time ig Procedure to change the Nitrox mix during a dive Press A button for 5 seconds Hold Button C DECO Stop icon 8 Fraction of Oxygen Mix icon blinks Fig 31 y8 Fig 32 Dive Time eR Description of Functions during Dive Mode The are several different displays and functions available in DIVE mode including non decompression dive mode decompression dive mode safety stop condition gage dive mode and out of measurement range condition The functions of each mode are described below Non decompression Mode Fig 27 This is for a non decompression NDL dive Gage Mode Fig 29 The only functions that can be performed in this mode are the depth calculation water temperature measurement and dive time measurement If you use this mode when diving the N21Tion remains in Gage mode until 48 hours have elapsed When using gage mode the safety stop function 1s not available Decompression Mode Fig 30 This is used for dives that last longer than the NDL s The DECO icon warning will continue until the advised depths are reached If you ignore the DECO warning and go straight to the surface for longer than 10 minutes the display will freeze and all calculations will stop The N21Tion will switch automatically to TIME mode after 48 hours have elapsed This information is recorded in the dive log The N2iTion can only switch to log profile or PC transfer mode while2. implied to the two year term as set forth above All remedies are waived unless claim is made within the applicable twenty four 24 month period Your remedies are limited to those contained therein and are in lieu of all other remedies whether based on breach of warranty or contract negligence strict product liability or other tort ZEAGLE specifically disclaims liability for any consequential special or indirect damages arising out of the use of your dive computer 22 Technical Specifications 1 Accuracy e Time average monthly variance 30 seconds e Depth 3 2ft 3 0 5m e Temperature 4 F 2 C 2 Measurement range e Depth 0 0 328 ft 0 0 99 9m In gage mode 0 0 656 ft 0 0 199 9m Uses saltwater as standard e Dive time 0 599 minutes e Altitude 0 19680 ft 0 6000m e Measurement interval of 10 minutes It excludes dive mode time set mode PC transfer mode e Temperature 23 to 104 F 5 to 40 C e Measurement interval of 1 minute measures only in Dive mode 3 Operating temperature e Operating temperature 23 to 104 F 5 to 40 C At cold temperature the display will be somewhat dim 4 NITROX setting e MIXI FO 21 50 setting step 1 e MIX2 FO 21 99 setting step 1 5 Waterproof ability e The waterproof ability to 328 ft 99 9m 6 Battery life e Battery life about 3 years uses battery CR2032 under conditions as follows The computer 1s used for 50 o
3. 4 5 seconds B MODE This button is the mode select button e Time mode gt Dive log mode gt Dive profile mode gt PC transfer mode gt Time mode gt e C RIGHT Press this button to change setting the contents In time mode EL back light is on from 4 5 seconds e D TOP Water detection switch no function WARNING An N2iTion displaying an Out of Range warning is incapable of display ing other critical information such as depth time Ascent Rate PO OLI and Deco Stop Violations and required decompression stops You should not nder any circumstances use an N21Tion in such a way that would cause the Out of Range Warning to be displayed Under such conditions the risk of Serious personal injury or death would be substantial Gage dive mode Fig 29 e A LEFT The EL back light is on from 4 5 seconds e B MODE The EL back light is on from 4 5 seconds e C RIGHT When the user pushes and holds the C RIGHT button it displays the temperature the dive time and the maximum water depth The EL back light will come on for 4 5 seconds e Ata depth less than 5 feet 1 5 m the water detection switch D TOP is OFF the N21Tion moves to time mode Z 16 Gage Mode The only functions that can be performed by the computer in this mode are the depth calculation water temperature measurement and dive time measurement functions Calculation functions such as calculation of PGT OLI etc are not
4. current time of day AM PM Icon This icon is shown in 12 hour format Current date This shows the current year month and day Battery indicator Icon This displays the current battery voltage Not shown The Battery Indicator Icon is only visible if the battery voltage is 2 7V or below Mode display This shows Time set mode Operation of buttons during Time set mode From the TIME mode press and release the B button five times to enter SET mode A LEFT Press button to select mode second minute hour year month day 1 2 24tense seconds B MODE Press this button to move to time mode C RIGHT Press this button to change setting the contents C Press and hold this button to change setting the contents using fast scrolling D TOP When water is detected the mode moves to dive mode Auto return The display automatically returns to Time mode when no buttons are used for 2 to 3 minutes B MODE Press and hold this button for 1 2 seconds to move to Time mode Z 14 Dive Mode Gage Dive Mode The N2iTion will automatically enter Dive Mode when the D TOP buttons come in contact with water Non decompression Safety Stop Current Repth Safety Stop time NDL OLI Graph Dive time Fig 27 Fraction of Oxygen PO Gage Dive mode Gage con Maximum fresh depth alarm icon Diye time alarm icon Sea Fresh icon QA Decompression DECO Stop icon Decompression stop depth
5. number 60 1 gt 60 2 gt gt 2 gt 2 2 gt 1 1 gt 1 2 e A Press and hold this button to change log number using fast scrolling e B Press this button to move to Dive Profile Mode e C Press this button to change log number 1 2 gt 1 1 gt 2 2 gt 2 1 gt gt 60 2 gt 60 1 e C Press and hold this button to change log number using fast scrolling e D When water is detected the mode moves to Dive Mode e Auto return The display automatically returns to Time Mode when no buttons are used for 2 3 minutes e B Press and hold this button for 1 2 seconds to move to Time Mode 11 Dive Profile Mode Profile depth No data Fraction of Oxygen Log number Sea Fresh icon Mode Description of the Dive Profile mode Dive log mode provides functions for recording various data during a dive when the dive depth is at least 5 feet 1 5m and the dive time is at least 3 minutes Data is recorded during each successive dive and the log data storage capacity is about 30 hours of dive time when the profile s sampling time is set at 30 seconds or up to 60 log data entries If the logged dive time exceeds 30 hours or the number of log data entries exceeds 60 the oldest data is automatically deleted See the section describing Profile Mode for further description of log data and profile data The logged data is described below Dive date The date of the dive Fig 23 Dive time This 1s the
6. previous dives in the same repetitive dive series Neither the N21Tion nor any other dive computer presently available physically measures the amount of nitrogen present in body tissues or the rate at which this nitrogen is being absorbed or released Instead the N21Tion monitors depth and time and uses this data to work a mathematical formula designed to emulate how individuals in good general health and whose physical characteristics do not place them among those at higher risk of decompression illness are assumed to absorb and release nitrogen from body tissues Thus the N2iTion cannot compensate for factors such as age obesity dehydration cold or exertion which experts believe place divers at greater risk of decompression illness If these or similar factors apply to you use the N21Tion and any other dive computer or dive table with even greater caution Experts still know surprisingly little regarding the exact nature and causes of decompression illness also known as decompression sickness DCI or DCS Susceptibility to DCI may vary substantially from person to person and from day to day Neither the N21Tion nor any dive computer or table can guarantee that you will not suffer decompression illness Even though you use these items correctly you may still suffer DCI Do not rely on the N21Tion as your sole means of avoiding decompression sickness Experts recommend divers wait at least 24 hours following any dive before fly
7. relation between altitude rank levels and altitudes are shown below A new altitude measurement and calculation is made once every ten minutes Altitude Rank Altitude Range O 0 900m 0 2952ft 600 1800m 1968 5904ft 1500 2600m 4920 8528ft 2300 6000m 7544 19680ft Over 6000m over 19680ft Fig 4 When the altitude is over 19680 feet 6000 meters the display will blink while showing the altitude rank and Err icons and the dive computer will not function until the altitude drops to a lower level under 19680 feet 6000 meters The calculations of PGT OLI and desaturation time are stopped when altitude is over 19680 feet 6000 meters and Err is displayed however surface time continues to be counted When the altitude 1s less than 19680 feet 6000 meters the display shown before reaching that altitude is displayed again The same displays and processing occur if the altitude cannot be measured for any reason Altitude measurements are made during all modes except Dive and PC Transfer Mode The computer will display the current altitude setting icon in Time Mode and Plan Mode In Dive Log Mode the rank of the dive is displayed Warning The N21Tion is not intended for use at altitudes above 19680 ft 6000 m Diving at high altitudes carries an increased risk of decompression sickness Below are the Altitude Setting Icons for the rank of 0 1 2 3 If the altitude exceeds 19680 feet the icon will blink and the
8. Err icon will be displayed Fig 5 A a de Altitude Rank A A A itude Ran YY If the Altitude exceeds 19680 feet 6000 meters the display shown below will appear Fig 6 7 Fig 5 Blink Caution A change in the altitude rank will cause PGT graph to be displayed and desaturation time to be performed even if the PGT graph was not previously active Never touch the water detection switch D shown in figure 1 or expose it to moisture when on an airplane or in any other environment where air pressure can change quickly When the PGT graph 1s high 7 or 8 bars a change in the altitude rank may cause the ninth level indicator to appear To prevent this never use the dive computer when going to high altitude locations since it will disable dive mode as a safety precaution Normal function of the dive computer will be restored when PGT graph drops to 8 bars or less A difference of one minute may occur between when the PGT graph is turned off and when desaturation time is turned off Operation of Buttons During Time Mode Prior to a dive The letters correspond to the buttons of the N2iTion shown in figure 1 e A LEFT EL back light is on from 4 5 seconds e B MODE Press this button to move to dive set mode e C RIGHT EL back light is on from 4 5 seconds e DP TOP When water is detected the mode moves to dive mode During a Surface Interval e A LEFT EL back light is on from 4 5 se
9. M ia j f Lo poet Pe VA A J d a prd v i a vey j V gt o on 5 ly An al va dede Owner s anal m Y he o h A re ao y A RIS AAA A 3 J ray La Y 4 x RY o U x VW H a ne 5 y E 5 4 O gt j 4 do A E l r A De v J Table of Contents 00 N Soe SN 11 12 13 14 15 16 we 18 19 20 21 22 Introduction Key Features Common Sense Warnings Accessing Display Modes Time Mode Battery Indicator Altitude Setting Dive Set Mode and Gage Dive Set Mode Dive Plan Mode Dive Log Mode Dive Profile Mode PC Transfer Mode Date and Time Set Mode Dive Mode Gage Dive Mode Various Warnings Gage Mode N2iTion Computer Reset Battery Replacement Units of Measurement General Handling Warranty Technical Specifications 0 O N O U U U A A A Y U U U M NY NY YN a U O O O O N OA A U OQ XA 1 Introduction Congratulations on your selection of the Zeagle N21Tion Dive Computer The N21Tion is a compact and sophisticated dive instrument that will give you a reliable trouble free performance dive after dive Please read and understand this manual completely before using your new Zeagle N21Tion Dive Computer The information in this manual has been developed for your safety and understanding Key Features Can handle both air and nitrox or 2 nitrox mixes User changeable PO setting Visual and Audible alarms Safety st
10. as on a car s dashboard It will return to normal once allowed to cool however extensive exposure to heat may shorten LCD life Other than for battery replacement following the procedures outlined in this manual the N2iTion is not to be disassembled by anyone other than ZEAGLE or its authorized dealers Unauthorized disassembly will violate the warranty If the N21Tion does not appear to be functioning properly in any manner do not use it to dive Return it to your authorized ZEAGLE dealer for repair Rinse the N2iTion thoroughly in fresh water following every dive Do not use cleansers chemicals or solvents to clean the N21Tion Use a soft cloth to gently wipe dirt or water stains from the screen Store the N21Tion in a clean dry location After diving wipe the computer dry and store it in a location separate from other damp items ES 21 Warranty Two Year Limited Warranty ZEAGLE warrants that ZEAGLE Scuba dive computers purchased from authorized ZEAGLE Scuba dealers shall be free from defects in materials and workmanship under normal sport skin and scuba diving use and with proper maintenance and care for a period of two 2 years from date of original purchase Under this limited warranty ZEAGLE will either repair or replace at its sole option any original equipment or parts that fail to perform as intended When this limited warranty is in force it covers the cost of necessary replacement parts Labor and shippin
11. attery Replacement In order to replace the battery remove the clear cover with a coin by unscrewing it in the open direction indicated by an arrow on the cover Remove the battery and inspect the compartment for signs of corrosion or water If you find signs of corrosion return the computer to your authorized ZEAGLE dealer Replace the old battery with a new one taking care that the polarity 1s correct Failure to do so may result in the computer losing its calibration Inspect and lubricate the battery compartment cover O ring with a thin film of silicone grease before replacing 1t Screw the cover back in place in the direction indicated on the cover Do not over tighten Please note that the warranty does not cover damage to the computer due to improper battery replacement DA 19 Units of Measurement You can change the units of measurement for water depth and temperature of the N21Tion In Dive Set mode press and hold down both the A and C button for six or more seconds The computer will beep once to tell you that the system has changed Always verify the the units of measure are correct before starting to dive 20 General Handling Do not store the computer in hot and or humid environments The pressure transducer 1s sensitive to both heat and humidity If impaired 1t may cause the display of incorrect altitude or depth data The N2iTion s Liquid Crystal Display LCD may darken 1f left in a hot environment such
12. conds e B MODE Press this button to move to dive set mode but if surface time 1s less than 10 minutes display moves to dive plan mode e In gage mode press B to move to the gage dive set mode display If surface time is less than 10 minutes the mode moves to dive log mode e C RIGHT EL back light is on from 4 5 seconds e D TOP When water is detected the mode moves to dive mode 8 Dive Set Mode and Gage Dive Set Mode To enter Dive Set mode from Time mode press the B MODE button once Once in Dive Set mode press the C RIGHT button to enter Gage mode Note If the surface interval is less than 10 minutes the computer will not enter gage mode NITROX Icon Maximum Depth of PO Fraction of Oxygen Fig 9 11 Maximum Depth Alarm Dive Time Alarm Fig 10 Fig 11 In Dive Set mode the following information is displayed Fraction of oxygen FO Fig 8 MIX setting range Fraction of oxygen 21 50 MIX2 setting range Fraction of oxygen 21 99 Maximum depth of PO Based on the fraction of oxygen this indicates the water depth where the PO pressure of oxygen reaches 1 4 MIX1 or 1 6 MIX2 Fig 8 If the water depth rank exceeds the maximum water depth the no decompression limit displayed will show bars e User Safety Factor USF If the level is 0 the usual algorithm is used for dive calculations When the level 1s changed to 1 or 2 the next higher a
13. d The maximum displayable NDL is 200 minutes wg e PGT Pressure Gas in Tissue graph This bar graph shows the amount of Nitrogen using nine indicator segments e OLI Oxygen Limited Indicator graph This bar graph shows the level of the Oxygen Limit with eight indicator segments e Fraction of oxygen This displays only MIX as the current setting e Sea Fresh Icon This indicates the water setting sea water fresh water e Altitude rank The computer automatically measures and calculates the e current location s altitude and displays the corresponding altitude rank e Nitrox Icon This Icon is ON when NITROX has been set for MIX1 or MIX2 It blinks if the MIX1 and MIX2 setting are using the default setting The FO must be set prior to diving with the N2iTion e Don t Fly Icon While the computer calculates desaturation time this icon 1s turned on in Time mode When the computer has finished calculating desaturation time and Time Mode is over 12 hours this Icon is turned off e Desaturation time This indicates the time remaining until the body s internal nitrogen is desaturated e Surface time This is the surface interval time after a dive Surface time is started from when the depth shown in Dive Mode reaches 5 feet 1 5m or less If the depth changes back to 5 feet 1 5m or more within 10 minutes the previous dive mode 1s continued Surface time 1s displayed for 48 hours after the last dive Operation of buttons du
14. dive time Fig 23 Log number This indicates the number of the currently displayed profile data among all of the currently recorded data entries Fig 23 Fraction of Oxygen This shows the Mix value used while diving Fig 23 Sea Fresh Icon This indicates the water setting sea water fresh water Fig 23 Gage Mode Icon The icon 1s ON if used in Gage mode Mode display This shows Dive profile mode Fig 24 Battery indicator Icon This displays the current battery voltage Not shown Profile depth This indicates a maximum water depth value every sampling time If depth is over 328 ft 99 9m this display is In Gage mode if depth is over 656 ft 199 9m this display is Fig 23 21 Operation of Buttons during Profile mode From Time Mode press the B button four times to enter Profile Mode 22 Auto count up dive time The display automatically increases the dive time A Press and hold this button to stop the auto rank increment function for profile data The auto rank increment function will resume when you release Button A This setting is invalid when the last profile data is being displayed B Press this button to move to PC Transfer Mode when there is no log and profile data it moves to Time Set Mode But if surface time is less than 10 minutes the mode moves to time mode not PC transfer mode C Press this button to change log number 60 539 538 2 1 60
15. eC Press and hold this button to change log number fast scrolling 600 39 538 2 1 60 D When water 1s detected the mode moves to Dive Mode Auto return The display automatically returns to Time Mode when no buttons are used for 2 3 minutes B Press and hold this button for 1 2 seconds to move to Time Mode 12 PC Transfer Mode If surface time is less than 10 minutes after a dive and there is no log and profile data the computer will move to Time Mode a PL Mode Fig 23 Description of display during PC Transfer Mode e Battery Indicator Icon This displays the current battery voltage Not shown The Battery Indicator Icon 1s only visible 1f the battery voltage 1s 2 7V or below e Mode display This shows PC transfer mode Fig 23 Operation of buttons e A LEFT No function B MODE Press this button to move to Time Set Mode e C RIGHT No function e D TOP No function e The Transfer Mode remains active for 14 15 minutes and then moves to Time Mode B MODE Press and hold this button for 1 2 seconds to move to Time Mode The computer switches to Time Mode when the transmission ends A l 32 24 13 Date and Time Set Mode Note If surface interval time is less than 10 minutes after a dive the computer will not enter this mode Blinking icons are show within a square Description of Display during Date and Time set mode Fig 26 Current time This is the
16. g charges are not included and must be paid by you You must save the original purchase receipt as proof of purchase This limited warranty applies only to the original purchaser and 1s not transferable ZEAGLE makes no warranty or representation regarding the performance of any products used in conjunction with ZEAGLE s products This Limited warranty applies only to dive computers sold through authorized ZEAGLE Scuba dealers This limited warranty shall be void if the computer has been misused abused altered neglected lost or changed The warranty applies only to normal sport skin or scuba diving use This limited warranty shall be void if the product has been modified or if repairs are performed by anyone other than an authorized ZEAGLE dealer Equipment in question should be returned prepaid to your authorized ZEAGLE dealer or ZEAGLE along with proof of purchase This warranty gives you specific legal rights and you may also have other rights which vary state to state DA If you have any questions concerning the Two 2 Year Limited Warranty please address them to Zeagle Systems Inc 37150 Chancey Road Zephyrhills FL 33541 U S A www Zeagle com Some states do not allow limitations on how long an implied warranty lasts or do not allow exclusion of incidental or consequential damages so the following limitations may not apply to you Zeagle expressly limits any and all dive computer warranties expressed or
17. icates the current water depth The water depth is measured underwater every second If depth 1s over 328 feet 99 9m the display is In Gage Mode if the depth is over 656 feet 199 9m the display is Fig 27 e Dive time This is the current dive time Fig 27 e Maximum depth This is the maximum depth recorded during a dive If depth is over 328 feet 99 9m this display is In Gage Mode if depth is over 656 feet 199 9m this display is Fig 32 e Pressure of oxygen PO2 This indicates the PO2 value at the current depth This value is calculated based on fraction of oxygen and the cur rent depth Fig 27 e PGT Pressure Gas in Tissue graph This indicates the level of Nitrogen using up to nine level indicators Fig 27 e OLI Oxygen Limited Indicator graph This indicates the level of Oxygen Limit using up to eight level indicators Fig 27 e Maximum Depth Alarm Icon This icon is on if a maximum depth alarm has been set Fig 29 e Dive Time Alarm Icon This icon appears if a maximum dive time has been set Fig 29 Nitrox Icon This Icon is ON when NITROX has been used for MIX1 or MIX2 It blinks if the MIX1 and MIX2 setting is the default setting Fig 31 Gage Mode Icon This icon is diplayed during Gage Mode Fig 29 Safety Stop time It displays the countdown timer The timer begins at 3 minutes Fig 28 Decompression stop depth Ceiling The decompression s
18. ing in an aircraft or driving to altitude Failure to allow sufficient surface interval before performing these activities may substantially increase the risk of Decompression Illness DCI Do not plan dives to depths deeper than those for which the N2iTion is capable of displaying an available No Decompression Limit Doing so could cause you to exceed the No Decompression Limits or limiting PO of 1 6 bar which may in turn substantially increase your risk of decompression illness or CNS Oxygen Toxicity and can lead to serious personal injury or death ES 4 Operating the Display Modes MODE There are some display modes that the N21Tion enters and or exits automatically For example by taking the N21T1on underwater you automatically activate its Dive Mode Upon surfacing your N21Tion will automatically enter Surface Mode To access other modes you may need to push one of the three large grey buttons on the N2iTion s face These are the A LEFT B MODE and C RIGHT buttons Fig 1 You will find these buttons easy to use In some instances you may need only press a button once and release it to achieve the desired result In other instances you may need to hold the button down until you get the result you wish This manual will outline clearly which procedure to follow for each mode or task Throughout this manual display icons that blink are shown within a gray square E 5 Time Mode Time mode is the N2i1Tio
19. ltitude setting is used The default setting is 0 Fig 9 e Profiling time This setting is the sampling time used during the dive Fig 9 e Maximum Depth Alarm This alarm will generate a sound when it reaches the set depth The setting range is 30 320 ft 9 99 meters and can be set in 10 foot increments Fig 10 e Dive time alarm This alarm generates a sound when it reaches a diving time value set by the diver Fig 11 The setting range is 10 590 minutes in increments of 10 minutes e Nitrox Icon This Icon is ON when NITROX has been set for MIX1 or MIX2 It blinks if the MIX1 and MIX2 settings are at the default value Fig 8 e Sea Fresh Icon This icon indicates 1f the water setting is sea water or fresh water Fig 8 e Gage Mode Icon This icon will be displayed if gage mode has been selected Fig 9 a Caution The display The setting changes to this display automatically at 24 00 on the day the MIX value was set except when the setting is Air FO equals 21 If the user forgets to set the FO an audible and flashing alarm is generated when the computer moves to Dive mode If MIX 1 is set at Air 21 and MIX 2 1s set at 21 or the setting for MIX 1 will remain at 21 The displayed setting for MIX 2 will always revert to at 24 00 on the day the value was originally set Operation of Buttons during Dive and Gage Set mode e A Press the A LEFT button to select the func
20. mpressed air or Enriched Air Nitrox EANx mixtures whose fraction of Oxygen falls within a range of 22 to 50 for mix one and 22 to 99 for mix two Although the N21Tion is capable of calculating decompression stop requirements this ability is provided as a safety feature only should a diver accidentally exceed the No Decompression Limits NDLs Dives requiring mandatory stage decompression carry substantially greater risk than dives made well within no decompression limits Decompression diving is widely believed to entail substantially greater risk of decompression illness than dives made well within the No Decompression Limits NDL The N2iTion provides decompression stop information solely as a contingency in case divers accidentally exceed the No Decompression Limits It is not designed or intended for use as a tool to plan or execute dives that participants know will entail mandatory decompression ES WARNINGS The N21Tion is designed to be used by only one diver at a time Divers should not share a single N2iTion or any dive computer on the same dive Additionally no diver should lend his or her N21Tion to anyone else until it calculates that no measurable residual nitrogen remains after previous dives and displays neither the Desaturation Time nor No Fly indicators while in Surface Mode Further no diver should use his or her N21Tion for repetitive dives unless that same N21Tion has accompanied him or her on all
21. n s default mode In this mode the screen displays a minimum of the current date and time of day Within 24 hours of surfacing from a dive the N2iTion will display additional information while in Time Mode A description of the screens is shown below Normal After Dive NITROX Icon Current Time PGT Graph Current date Mode Desaturation Time Fig 3 Don t Fly Icon Note Blinking icons are shown in a square e Current time This is the current time of day Fig 2 e Current date This is the current date Fig 2 e Battery indicator Icon This displays the current battery voltage not shown e PGT Pressure Gas in Tissue graph This indicates the level of Nitrogen with nine level indicators Fig 3 e OLI Oxygen Limited Indicator graph This indicates the level of Oxygen limit with eight level indicators Fig 3 e Nitrox Icon This Icon is ON when NITROX has been set for MIX1 or MIX2 It blinks if the MIX1 and MIX2 setting is the default setting Fig 3 e Desaturation time DESAT This indicates the time remaining until the body s internal nitrogen is desaturated Fig 3 e Surface time SURF T This is the surface interval time after a dive The timer is started from when the depth shown in Dive mode reaches 5 feet 1 5m or less If the depth changes back to 5 feet 1 5m or more in less than 10 minutes the previous dive is continued Surface time is continued for 48 hours After that surface time is t
22. n dive mode starts The alarm will contine until the FO for MIX one is set Fig 39 Default warning 33 Operation of buttons during Dive mode Non decompression Fig 27 e A LEFT Press this button for 3 4 seconds to change to the next MIX The EL back light will come on for 4 5 seconds B MODE EL back light is on from 4 5 seconds e C RIGHT When user pushes and holds button C it displays the tem perature the dive time the maximum water depth and setting FO value And EL back light is on from 4 5 seconds e In less than 5 feet 1 5 m of water the N21Tion moves to time mode Decompression Decompression stop violation Fig 30 36 e A LEFT Press this button for 3 4 seconds to change the MIX The EL back light is on from 4 5 seconds B MODE EL back light is on from 4 5 seconds e C RIGHT When user pushes and holds a button C RIGHT it displays the temperature the dive time the maximum water depth and setting FO value And EL back light is on from 4 5 seconds e Once the diver is less than a depth of 5 ft and after 10 minutes the N2iTion moves to Decompression stop violation lock The computer can t be use for 48 hours The mode will be automatically switched to time mode after 48 hours have elapsed Decompression stop violation lock In this mode the computer is locked until 48 hours have elapsed The N2iTion won t move to dive plan mode A LEFT Press this button to select the place you want t
23. ne hour dives in a year with the alarm sounding for 10 seconds per a dive 7 Algorithm e The N2iTion uses a modified Swiss model 12 compartment Algorithm by Randy Bohrer EA gt 44 Notes The date of purchase dive store and contact information at the store should be written on this page A copy of the receipt could also be stapled to this page for future records To download a copy of the user s manual or to register this product please visit www zeagle com ES p n 370 9001 2008 Zeagle Systems Inc 08 08 Rev B
24. ng information Dive date is the date of the dive Dive start time 1s the time at the start of the dive Dive end time is the time at the end of the dive Both Dive start time and Dive end time are displayed in 24 hour format Fig 13 e PGT Pressure Gas in Tissue Graph This represents the level of Nitrogen with nine level indicators at the end of the dive Fig 14 e OLI Oxygen Limited Indicator Graph This represents the level of the Oxygen Limit with eight level indicators at the end of the dive Fig 14 e Altitude Rank This is the altitude setting used during the dive Fig 13 e Nitrox Icon This Icon is ON when NITROX has been set for MIX1 or MIX2 It blinks if the MIX1 and MIX2 setting is the default setting Fig 13 e Fraction of Oxygen FO It displays the FO which was used while diving Fig 13 e Dive Time This is the dive time Fig 13 e Water Temperature Water temperature at maximum depth The measurement range is 23 to 104 F 5 to 40 C It display Lo when water temperature is under 23 F 5 C It display Hi when water temperature is over 104 F 40 C Fig 14 e User Safety Factor USF When the level is 0 the usual algorithm is used for calculations When the level is 1 or 2 the next higher altitude rank is used for the dive calculations The default setting is 0 Fig 14 BO e Average Depth this is the average water depth during the dive If the de
25. o change During a Decompression stop violation lock display the EL back light will remain on for 4 5 seconds B MODE This button is used to switch modes Decompression stop violation lock gt Dive log mode gt Dive profile mode gt PC transfer mode gt decompression stop violation lock gt C RIGHT Press this button to change setting contents During a decompression stop violation lock display the EL back light is on from 4 5 seconds D Water detection button no function Out of measurement range condition Fig 33 All display segments on the screen blink during this alarm A LEFT Press this button to for 3 4 seconds to change the Mix The EL back light will be on for 4 5 seconds B MODE Pushing this button turns on the EL back light for 4 5 seconds C RIGHT When the user pushes and holds the C RIGHT button the screen displays the temperature the dive time the maximum water depth and setting FO value The EL back light will come on for 4 5 seconds At a depth less than 5 feet 1 5 m the water detection button switches OFF and the N2iTion moves to a lock condition 35 36 Out of measurement range lock In this mode the N21Tion is locked until 48 hours have elapsed All display segments blink during time mode The computer can t move to dive plan mode dive set mode time set mode e A LEFT Press this button to select the place you want to change In time mode display EL back light is on from
26. op function Decompression and non decompression dive information Gage mode Maximum depth alarm Dive time alarm Display backlight User changeable battery 3 Common Sense Warnings As is true of every piece of diving equipment including all dive computers the N21Tion s 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 N2iTion WARNINGS Before using the N2iTion it is extremely important that you read the following points as well as similar warning and caution notices that appear throughout this manual Failure to do so could result in damage to or loss of equipment serious personal injury or death The N2iTion is designed for use by certified recreational divers who have obtained a sufficient level of knowledge and skill proficiency through formal training ongoing study and experience It 1s not intended for use by persons who lack the qualifications and thus may not be able to identify assess and manage the risks scuba diving entails Use of the N21Tion in conjunction with Enriched Air Nitrox EANx further requires that the diver be trained and certified for Nitrox diving The N2iTion is not intended for use by commercial military or technical divers whose activities may take them beyond the commonly accepted depth limits for recreational diving The N2iTion is designed for use by divers breathing either normal co
27. performed If you dive in this mode for 3 minutes or longer this information will be recorded in the dive log and profile mode Time Mode Dive Set Mode Fig 40 Fig 41 Fig 42 Fig 43 QzA lt gt r When diving in the gage mode the Gage Icon is displayed while in dive log mode The PC transfer mode and time set mode operate normally Operation of Buttons during Gage mode B MODE This button is used to select the mode Time mode gt Dive set mode gt Dive log mode gt Dive profile mode gt PC Transfer mode gt Time set mode gt Time mode gt The plan mode does not function while using Gage mode The Gage set mode 1s slightly different from Dive mode Gage Select gt Profile time gt Sea Fresh gt Max Depth Set gt Max Depth Alarm On Off gt Dive Time Set gt Dive Time Alarm On Off gt Gage Select gt 17 N2iTion Computer Reset All settings can be set to manufacturer default values by using the computer reset button This button is located on the back of the computer near the bat tery compartment door To reset the computer simply press the button All data regarding nitrogen absorption desaturation as well as the time and date will be erased WARNING ever reset the computer if you are planning repetitive dives By resetting the computer you erase all calculations regarding desaturation Failure to follow this warning could result in serious personal injury or death 18 B
28. pth is over 328 ft 99 9m the display is In Gage mode if depth is over 656 ft 199 9m the display is Fig 14 e Maximum Depth This is the maximum depth recorded during a dive If the depth is over 328 ft 99m the display is In Gage mode if the depth is over 656 ft 199 9m the display is Fig 14 e Ascent Rate Indicator This is the maximum Ascent rate recorded during a dive Fig 14 e Sea Fresh Icon This indicates the water setting sea water fresh water Fig 14 e Gage mode Icon If the computer is in gage mode this icon is ON Fig 14 e Warning Displays These are warnings that can occur during a dive Ascent rate warning Decompression Dive TE B DECO STOP icon is on 300 M00 CTT Slow icon blink Decompression stop violation Out of measurement range warning DECO STOP icon blink All segments blink oR PO warning OLI je PO icon blink OLI bar graph blink The Gage Dive Log Mode provides functions for reviewing information recorded during a dive It functions the same as dive log mode when the dive depth 1s at least 5 ft 1 5m and the dive time 1s at least 3 minutes The gage icon will be displayed and it will show that the computer was used in gage mode The logged data is described below Fig 22 Gage a Mode 1400 M al CO i Fig 22 S Operation of buttons during Log mode e A Press this button to change the log
29. rement condition the entire display blinks Changing the Nitrox mix during the dive Fig 31 32 By pushing and holding the A LEFT button the diver can switch the Nitrox mix that was set in the dive set mode How to switch the Nitrox mix during a dive When Button A LEFT is pressed the PO display changes to the currently set oxygen ratio and blinks twice When Button A LEFT is pressed and held for four or five seconds the MIX setting is switched Once this setting is changed the back light goes on for 3 4 seconds and the modified oxygen ratio is displayed for 3 4 seconds If the modified setting was for MIX1 then the display switches to MIX2 or if it was MIX2 the display switches to MIX 1 If the PO of the new mix is equal to or more than 1 6 the N2iTion will not allow the mix to be changed Also if the MIX2 is it will not change ES WARNING Do not use your N2iTion without confirming that its FO setting accurately matches that of your breathing media Failure to do so may mean that your N21Tion will be unable to accurately monitor your exposure to nitrogen and oxygen and lead to decompression illness DCI or CNS Oxygen Toxicity conditions that can cause serious personal injury or death C RIGHT button When the user pushes and holds button C RIGHT it displays the tempera ture the dive time the maximum water depth and setting FO value Display Description during Dive mode e Current depth This ind
30. ring dive plan mode e A MODE Press this button to decrease the depth rank e B LEFT Press this button to move to dive log mode e C RIGHT Press this button to add one to the depth rank e D TOP When water is detected computer moves to dive mode e Auto return The display automatically returns to time mode when no buttons are used for 2 3 minutes e B LEFT Press and hold this button for 1 2 seconds to move to time mode S 10 Dive Log Mode To enter Dive log Mode from Time Mode press the B button three times Display 1 Dive Time Dive Number Dive End Time Fig 13 Fraction of Oxygen Log Number Display 2 Water Temperature No Data Mode Fig 15 _____ amp Description of the Dive Log functions The Dive log mode records various data during a dive when the dive depth 1s at least 5 feet 1 5m and the dive time 1s at least 3 minutes Data is recorded during each successive dive and the log data storage capacity is about 30 hours of dive time or up to 60 log data entries If the logged dive time exceeds 30 hours or the number of log data entries exceeds 60 the oldest data is automatically deleted See the section describing profile mode for further description of log data and profile data The logged data is described below e Log Number This indicates the number of the log entry being recorded among the recorded logs Fig 13 e Dive Date Dive Start Time Dive End Time This is divi
31. th the N2iTion will alert the diver with the display and an audible alarm If the diver returns to the indicated water depth the warning display stops blinking This information is recorded in the dive log Fig 36 Decompression stop warning violation Oxygen Limit Indicator warning When the OLI graph reaches 7 or 8 bars the N2iTion responds with a flashing display and an audible alarm There are two types of warnings as described below Fig 37 a Graph value equals 7 bars The computer informs the diver with the display and the alarm This information is not recorded in the dive log b Graph value equals 8 bars the computer informs the diver with the display and the alarm The blinking display continues until the graph value reaches 7 bars This information is recorded in the dive log OLI warning O PO warning Fig 38 The Pressure of oxygen PO value is determined based on the set oxygen ratio and the current depth When the PO value exceeds a certain value the information is recorded in the dive log when the PO warning occurs once The types of settings and warnings are described below When PO equals 1 4 The warning display blinks and an audible alarm is sounded b When PO equals 1 6 or more The warning display blinks and an audible alarm is sounded The entire OLI graph blinks PO warning Default warning When the MIX 1 is set at the default value an audible alarm will sound whe
32. the calculations have stopped Safety Stop Timer Fig 28 This timer shows the recommended safety stop while in dive mode If the diver descends over 32 feet 9 9m then comes up to a depth of 20 feet 6m this value appears instead of NDL Safety stop time starts at 3 minutes and is counted down until the time is 0 The safety stop timer disappears and NDL appears in its place once the timer reaches zero The timer stops temporarily 1f the depth becomes equal to or more than 26 5 feet 8 1m during which time the counter stops temporarily and the NDL display appears again The timer is reset if the depth becomes equal to or more than 33 feet 10 m If the diver doesn t follow the safety stop information the N2iTion doesn t impose any penalty DQ gt Out of measurement range condition Fig 33 When exceeding a measurement range the exceeded parameter becomes display and all of the displays blink The following situations will cause an Out of Measurement Range condition Case 1 the water depth exceeds 328 ft 99 9m Case 2 the dive time exceeds 599 minutes Case 3 decompression is required at a decompression stop depth greater than 30 meters 100 feet Case 4 decompression stop time has exceeded 99 minutes Case 5 total ascent time has exceeded 99 minutes Ex water depth exceeded a measurement range The water depth exceeds the measurement range over 328 ft 99 9m During an Out of Measu
33. tion you would like to modify Gage SELECT gt MIX1 FO set gt MIX2 FO set gt User Safety Factor gt Profile time gt Sea Fresh gt MAX DEPTH SET gt MAX DEPTH ALARM ON OFF gt DIVE TIME SET gt DIVE TIME ALARM ON OFF gt Gage SELECT gt B MODE Press this button to move to the Dive Plan Mode In Gage Mode press this button to move to Dive Log Mode e C RIGHT Press this button to change the settings value e C RIGHT Press and hold this button to change setting the contents using fast scrolling D TOP When water is detected the mode moves to Dive Mode e Auto return The display automatically returns to Time Mode when no buttons are used for 2 3 minutes B MODE Press and hold this button for 1 2 seconds to move to Time Mode CAUTION If PGT OLI DESAT and the SURF T are active it isn t possible to switch to Gage Select Mode E A 9 Dive Plan Mode To enter Dive plan mode from Time mode press the B MODE button twice Note This mode cannot be entered while using Gage Mode Altitude Rank tn Depth Rank NDL No decompression Limit Time The following functions are displayed in Dive plan mode Fig 12 e Depth rank and NDL non decompression limit Use this function to set the planned dive depth and corresponding depth rank There are 14 depth ranks as shown below The NDL corresponding to the current PGT graph is displayed The displayed NDL is for when MIX1 is use
34. top depths are calculated according to the dive mode settings 10 320 ft 3 99mt Fig 30 Decompression stop time DECO STOP TIME This is the amount of time to be spent at a decompression stop depth A countdown timer is shown during decompression Fig 30 Total ascent time TOTAL This indicates the total amount of time required for ascent from the current depth to the surface assuming that all decompression stops are made Fig 30 DECO Icon This icon appears if the diver must perform decompression prior to surfacing Fig 30 Fraction of oxygen FO This icon displays the FO which was set for the dive 15 Various Warnings While you are in DIVE mode you should be alert for the following warnings NOTE Blinking icons are shown within a square e Ascent rate warning If a diver exceeds the recommended ascent rate according to the depth the N2iTion informs the diver with the display and an audible alarm The warning will continue until you slow your ascent rate or until you reach a depth of 5 ft 1 5m This information 1s recorded in the dive log Fig 34 Ascent Rate Warning e Decompression dive warning When the NDL is exceeded and the N21Tion changes to Decompression mode this warning is displayed This information 1s recorded in the dive log Fig 35 Decompression Dive warning S Decompression stop violation warning e When the current depth is shallower than the indicated decompression stop dep
35. urned off Fig 3 e Mode This display shows the computer in Time mode Fig 2 e Don t Fly Icon While the computer calculates desaturation time this icon is displayed during Time Mode When the computer has finished calculating desaturation time this Icon is turned off Fig 3 e Gage Mode Icon If the computer is in Gage mode this icon will appear 6 Battery Indicator Battery Indicator Icon This displays the current battery voltage as follows When battery voltage is 2 8V or above the battery Icon is OFF When battery voltage is 2 6 to 2 7 V the battery Icon blinks When battery voltage is less than 2 6 V the battery Icon is ON You cannot go into dive mode while the battery indicator Icon is blinking or ON The Icon can be displayed during all other modes Battery voltage is automatically measured during all modes except PC transfer and dive mode Important Once the battery indicator is blinking or ON you must return the N21Tion to your local authorized Zeagle dealer for battery replacement or replace the battery yourself following the procedure outlined later in this manual Before replacing your N2iTion s battery be sure to upload or copy all dive log data to your log book as the battery replacement process erases all such data from the N2iTion s memory Z 7 Altitude Setting The N2iTion automatically measures and calculates the current location s altitude and displays the corresponding altitude rank The
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