User Guide
www.diverite.com
Date of purchase:
NiTek He Dive Computer
Page 1: ...User Guide www diverite com Date of purchase NiTekHeDiveComputer NiTekHeDiveComputer ...
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Page 3: ... battery depletion or other conditions resulting from misuse negligence alteration accident or unauthorized repair To make a claim under this warranty the owner must have registered his her warranty using Dive Rite s website www diverite com He or she must then return the damaged items to Dive Rite along with a copy of the original purchase invoice or receipt No warranty service will be performed ...
Page 4: ...ting started 10 Accessing display modes and screens 11 Surface mode 12 Time display and set mode 13 Dive option set and display mode 15 Plan mode 24 Computer mode 26 Gauge mode 35 Log mode 36 Profile mode 39 PC transfer mode 41 Surface mode upon surfacing from a dive 43 Altitude operation 45 Chapter 3 Care and maintenance 47 Proper handling techniques 48 Low battery warning 50 Index 51 ...
Page 5: ...mmary This chapter provides an overview of the NiTek He lists the NiTek He s features and functions and covers warning information that should be read before using your NiTek He Content Overview 2 Features and functions 3 Specifications 5 Warnings 6 When diving 7 ...
Page 6: ...o read display providing simple and direct communication between the diver and the computer With an easy to read display the diver has no problem following and reading the displayed information The NiTek He comes standard with a number of modes including a time mode dive set mode dive plan mode log mode profile mode PC transfer mode and dive mode Note It is extremely important that you carefully r...
Page 7: ...mode The NiTek He automatically adjusts for altitudes up to 19 680 feet 6 000 meters The NiTek He displays a variety of data underwater including date time of day current and maximum depths no decompression dive time elapsed and remaining and water temperature The NiTek He displays data specifically related to the use of Enriched Air Nitrox EANx including fraction of oxygen FO2 setting partial pre...
Page 8: ...lay mode or screen you are in at any time The NiTek He has a back light to illuminate the screen while in dive mode The NiTek He s memory capability enables it to hold and display log data on up to 30 hours of dive time or 60 dives Detailed dive profile information can be stored for each dive through user programmable sample intervals of 15 or 30 seconds longer intervals allow data for a greater n...
Page 9: ...99 minutes Ascent rate warning 26 to 59 feet per minute 8 to 18 m Thermometer Measuring range 23 F to 104 F 5 to 40 C Accuracy 4 F 2 C Measurement interval Every minute Clock Accuracy 30 sec on average per month 24 hour display Altitude Altitude function monitoring from 0 to 19 680 feet 6 000 m measured every 10 minutes Measurement interval Every 10 minutes Battery Li MnO2 CR 2032 3V button batter...
Page 10: ...of the NiTek He in conjunction with Enriched Air Nitrox EANx or Trimix requires that divers be trained and certified for Nitrox diving The NiTek He is not intended for use by commercial or military divers whose activities may take them beyond the commonly accepted depth limits for recreational or technical diving Although the NiTek He is capable of calculating decompression stop requirements users...
Page 11: ...s apply to you use the NiTek He and other dive computers or dive tables 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 NiTek He nor any other dive table or computer can gua...
Page 12: ...uter Take a back up dive computer or dive tables along with a separate means of monitoring depth and dive time Be aware that the NiTek He makes assumptions regarding residual nitrogen based on altitude settings Avoid making abrupt changes in altitude following a dive as doing so may be very dangerous ...
Page 13: ... computer mode 15 Setting Mix1 through Mix7 gas percentages 17 Setting the maximum depth alarm 18 Setting the dive time alarm 18 Setting the dive profile sampling rate 19 Setting for fresh or salt water use 20 Setting the computer for metric or Imperial operation 21 Understanding default mode 21 Using gauge mode 22 Plan mode 24 Computer mode 26 Primary underwater screen 26 Second underwater screen...
Page 14: ...er mixes are set If you are using gauge mode make sure it is set to GAGE Make sure that you review the dive plan mode for maximum depths and times for the mixes you are using During a dive Monitor the NiTek He throughout your dive for depth and time Monitor the PGT and O2 loading bar graphs Pay attention to any alarms such as an ascent rate warning Follow the no decompression limits or complete th...
Page 15: ...ttons A mode and B which are used to access the different modes and screens To use the buttons simply press the button once or hold the button down depending on what you are trying to do The correct procedure to use is clearly defined in each topic throughout the manual A mode button This button is used to select and scroll through the different modes such as time mode and locks in setting values ...
Page 16: ... items are covered in Surface mode upon surfacing from a dive and Altitude operation 1 2 1 Date This is the month and day The first digit is the month and the second digit is the day For example 1 24 represents the twenty fourth day of January 2 Time of day This is the time of day expressed in hours and minutes Time can be displayed in 24 hour military format or 12 hour format When in 12 hour form...
Page 17: ...ay of January 2 Year This is the year 3 Time of day This is the time of day expressed in hours and minutes Time can be displayed in 24 hour military format or 12 hour format When in 12 hour format an AM or PM appears on the screen 4 Seconds This is the seconds for the time of day To display the time and date 1 Press and hold button B while in surface mode 2 Release button B to return to surface mo...
Page 18: ...s field flashes 2 Press button B to 00 the seconds field or press button A to select another field such as the minutes field 3 Using buttons A and B set the year month day hour minutes seconds and whether you want the time displayed in 24 hour format For example 1 00 PM would be 13 00 4 When finished press button A for two to three seconds to return to surface mode ...
Page 19: ...een and all computer mode functions operate normally The dive option set and display mode is used to review and change option settings that pertain to an upcoming dive The operating depth limit when in dive operation is 394 feet 120 meters When the computer is in dive set mode SET is displayed on the screen There are three screens that are used to set up all of the computer mode options 1 2 3 4 5 ...
Page 20: ...0 to 92 percent 5 Maximum operating depth MOD for FO2 setting This is the safe operating depth maximum for the mix selected This is based on a limiting PO2 factor of either 1 4 or 1 6 atmospheres 6 and 7 Max depth alarm This is an alarm that can be set to sound when a maximum depth is reached When the alarm is turned on the maximum depth alarm symbol is displayed 8 and 9 Maximum time alarm This is...
Page 21: ...can be set for 8 to 99 percent oxygen FHe percentages can be set for 0 to 79 percent helium Note If you only plan on using one mix on your dive you only need to set mix1 To set gas mix percentages 1 Press button A until SET is displayed 2 Press button B to enter the dive set up option screen Mix1 is flashing 3 Press button B to change the mix number to the desired mix number that you want to set o...
Page 22: ...meters To set the maximum depth alarm 1 Press button A until SET is displayed 2 Press button B to enter the dive set up option screen Mix1 is flashing 3 Press button A until the screen changes and maximum depth is flashing 4 Press button B to set the depth when you want the alarm to sound 5 Press button A The max depth alarm on off flashes 6 Press button B to toggle the alarm on or off 7 When fini...
Page 23: ...ss and hold button A for 1 to 2 seconds to return to surface mode Setting the dive profile sampling rate The NiTek He allows you to choose how frequently it samples and stores depth data The data it samples and stores is used in profile mode or when the data is uploaded to a personal computer There are two sampling rates to choose from 15 second and 30 second The 15 second sampling rate enables th...
Page 24: ...r 1 to 2 seconds to return to surface mode Setting for fresh or salt water use The NiTek He is capable of operating using fresh or salt water calculations This is based on One atmosphere of saltwater is 33 feet 10 meters One atmosphere of freshwater is 34 feet 10 3 meters Before going diving set the computer to the type of water you are diving in This allows for the most accurate calculations with...
Page 25: ...omputer until midnight unless the computer is underwater When the computer defaults all gas mixture settings change to 99 percent oxygen 99 percent helium and 99 percent nitrogen This is designed to help prevent the diver from diving with the NiTek He when it is has not been properly programmed to reflect the actual gases they are breathing If you try to dive the NiTek He when it is in default mod...
Page 26: ...ion Gauge operation is when the NiTek He is operating simply as a depth gauge and bottom timer GAGE is displayed on the screen Exposure to nitrogen and oxygen and no decompression limits are not tracked and no bar graphs are displayed This mode is used by divers who are relying solely on dive tables for decompression information The operating depth limit when in gauge operation is 656 feet 200 met...
Page 27: ...ual 23 To select and setup gauge operation 1 Press button A until SET is displayed 2 Press button B to enter the dive set up option screen Mix1 is flashing 3 Press button B until G is displayed for a gas mixture GAGE is displayed and the screen changes ...
Page 28: ...yed is 30 feet 9 meters You can advance the depth in 10 foot 3 meter increments Fourteen different dive plan depth increments can be displayed to a maximum depth of 160 feet 48 meters 2 No decompression limit NDL Depending on the depth displayed and the current FO2 setting the available no decompression limit up to a maximum of 200 minutes is displayed If the computer is in default mode a series o...
Page 29: ... no decompression time limits change automatically based on the depth 4 When finished press and hold button A for 1 to 2 seconds to return to surface mode WARNING Do not plan dives to depths deeper than those for which the NiTek He is capable of displaying an available no decompression limit Doing so could cause you to exceed the no decompression limits or a limiting PO2 of 1 4 or 1 6 atmospheres ...
Page 30: ... you with safety stop information and warnings if needed While underwater there are two screens you can toggle between and you can switch to different gas mixes when needed Primary underwater screen When you enter the water the primary screen shows your depth remaining no decompression limit dive time max depth PO2 for selected mix mix number O2 and He percentages for gas selected and the OLI and ...
Page 31: ...is is the time that is remaining in minutes before you reach the no decompression limit This NDL time limit increases when you ascend and decreases when you descend 7 Mix number This is the mix number the computer is currently calculating dive data for 8 O2 and He percentages This is the oxygen and helium percentages programmed for the gas mix number that is selected 9 PGT bar graph This is how mu...
Page 32: ...he primary diving mode screen Changing gas mixes underwater Because the NiTek He has the ability to use seven different gas mixes during a dive you need the ability to switch between these mixes while underwater When you switch mixes the PO2 adjusts to reflect the current mixture you are breathing Note Only switch gas mixes when you have reached the safe operating depth limit for the gas you are s...
Page 33: ... alert to Default warning Ascent rate warning PO2 limit warning PGT limit warning Oxygen limit index OLI warning Decompression warning Decompression stop violation warning Out of range warning Default warning If the computer is in default mode at the beginning of a dive an audible alarm sounds for three seconds If you ascend and set the mix percentages you can restart the dive See Understanding de...
Page 34: ...t 1 5 meters If the ascent rate is violated twice the slow symbol appears in log mode after the dive PO2 limit warning The PO2 warning indicates that you have exceeded the 1 4 atmospheres and or 1 6 atmospheres for the gas you are breathing If you set the PO2 for 1 4 atmospheres an alarm sounds and the current depth and PO2 information flashes If you set the PO2 for 1 6 atmospheres the OLI bar gra...
Page 35: ...of your exposure to elevated partial pressures of oxygen The PO2 warning only accounts for the intensity of the exposure but the OLI accounts for both the intensity and length When seven of the O2 s eight bars are displayed the computer s audible alarm sounds for three seconds and OLI flashes for ten seconds If you do not ascend to a shallower depth and all eight of the O2 s bars are displayed the...
Page 36: ...he screen 1 Deco stop symbol The DECO symbol displays indicating that you have to stop at the depth displayed 2 Required stop depth This is the required decompression stop depth 3 Required stop time This is the time you must remain at the indicated stop depth 4 Total ascent time This is the total amount of time in minutes you must spend at the decompression stops and the ascent time between decomp...
Page 37: ...in shallower than the indicated stop depth Note During a deco stop violation the computer s ascent rate warning does not function Caution If you do not correct an indicated deco stop violation the warnings continue for several minutes after surfacing At this point the computer is not usable for the next 48 hours Out of range warning The following can cause the out of range warning Descend below th...
Page 38: ...g other critical information such as depth time ascent rate PO2 OLI and deco stop violations and required decompression stops For this reason you should not under any circumstance use a NiTek He in such a way that would cause an out of range warning Under such conditions the risk of serious personal injury or death would be substantial ...
Page 39: ...feet 1 5 meters Note To enter and set up gauge mode operation see Using gauge mode While in gauge mode underwater there are two screens you can toggle between The primary screen displays depth time and maximum depth The second screen displays time of day and temperature To toggle between screens underwater 1 Press and hold button B to switch to the second screen 2 Release button B to return to the...
Page 40: ...og mode A to total of 30 hours or 60 dives can be stored Because of the amount of information the NiTek He stores there are two pages that you can toggle between for each dive Each dive is assigned a number and has a date for the day Each log page displays the log number and the page number making it easy for you to toggle between the dive log pages 8 3 1 2 4 5 6 7 9 10 Page one for a dive in log ...
Page 41: ... the amount of residual nitrogen and helium in your body at the end of the dive 7 O2 OLI bar graph This indicates CNS toxicity level at the end of the dive 8 Dive time This is the actual bottom time for the dive 9 FO2 and FHe gas percentages These are the FO2 and FHe gas percentages that you entered for the dive All calculations where based on these percentages 10 Mix number This is the mix number...
Page 42: ...User Manual OR Press button B to scroll down through the logged dives To fast scroll press and hold button B OR Press button A to view all mixes used on the dive 4 When finished press and hold button A for 1 to 2 seconds to return to surface mode ...
Page 43: ...e before a dive Refer to Setting the dive profile sampling rate for more information The dive number and date of the dive are displayed when you scroll through the dives This makes it easy to find the dive profile you want to view 2 4 1 3 1 Dive log number This is the dive number that corresponds to the dive number when in log mode 2 Dive time This tells you at what time during the dive you reache...
Page 44: ...to enter the profile mode screen 3 Press button B to scroll down through the logged dives To fast scroll press and hold button B Note Once a dive profile is selected the computer automatically progresses through the different depths and times of the dive 4 When finished press and hold button A for 1 to 2 seconds to return to surface mode ...
Page 45: ...end of the cable supplied with the interface into a COM port on your PC Plug the other end into the interface module Set the NiTek He to PC transfer mode as described below Place the NiTek He on the interface module and secure the strap over the computer Click the computer icon in NiTekLogic A dialog box should appear indicating the beginning of data transfer If it is not uploading check your COM ...
Page 46: ...s button A until PC is displayed 2 Press button B to enter the PC transfer mode screen PC LOAD is displayed on the screen 3 Transfer the dive log data to your PC Follow the instructions on the previous page 4 When finished press and hold button A for 1 to 2 seconds to return to surface mode ...
Page 47: ...it is no longer needed or after 24 hours have passed since the last dive Note If you are making repetitive dives you need to pay attention to your surface interval and use it in conjunction with plan mode This ensures that you stay within no decompression limits 2 1 3 4 1 Surface interval time This is the amount of time you have spent on the surface since your last dive if there is residual nitrog...
Page 48: ...re bar graph This is the amount of residual nitrogen and helium in your body at the end of the dive This drops as your surface interval time increases WARNING It is recommended that you wait at least 24 hours following any dive before flying in an aircraft or driving to altitude Failure to allow sufficient surface interval time before doing so may increase your risk of decompression illness DCI ...
Page 49: ...5 906 feet 700 to 1 800 meters 4 593 to 8 535 feet 1 400 to 2 600 meters 7 546 to 19 685 feet 2 300 to 6 000 meters ERR Out of range above 19 685 feet 6 000 meters Prior to using the NiTek He at altitudes substantially above sea level you should find out what the actual altitude of your dive site is Make certain that the altitude settings the NiTek He displays accurately match the altitude you are...
Page 50: ...raph may show that there is excess nitrogen present even though you may not have made any dives in the preceding 24 hours If you have obtained the altitude specialty diver training which everyone should do before diving at altitudes substantially above sea level you already understand that this should be expected By ascending to a higher altitude from a lower one your body has more nitrogen satura...
Page 51: ... User Manual 47 Chapter 3 Care and maintenance Summary This chapter provides care and maintenance and battery information for the NiTek He Content Proper handling techniques 48 Low battery warning 50 Replacing the battery 50 ...
Page 52: ...ort your NiTek He on an aircraft or take it to altitude while it is sealed in an air tight container Doing so may interfere with its ability to correctly read display and track depth information The NiTek He s Liquid Crystal Display LCD may darken if left in a hot environment such as on a car s dashboard It will return to normal once allowed to cool however extensive exposure to heat may shorten L...
Page 53: ... the NiTek He Do not use the NiTek He in hyperbaric chambers if the device is not fully submerged in water Always rinse the computer with freshwater after use Store the NiTek He in a cool dry location After diving wipe the computer dry and store it in a location separate from other damp items ...
Page 54: ... NiTek He functions may cease within two to three days of the low battery symbol first appearing Always have low batteries replaced promptly A depleted battery that is left in a NiTek He for a long period of time may leak Replace batteries promptly Replacing the battery Note Once the low battery warning appears you must return the NiTek He to your local authorized Dive Rite dealer for battery repl...
Page 55: ...handling techniques 48 clock 5 computer mode 26 options 15 computer mode 15 D date 12 13 log mode 37 profile mode 39 date and time 3 deco symbol 32 decompression stop violation warning 33 decompression warning 32 default mode 21 surface mode 12 default warning 29 depth 3 24 26 maximum 26 profile mode 39 stop depth 32 depth sensor 5 desaturation time 43 descent time log mode 37 dive log 4 5 dive op...
Page 56: ...og mode 36 viewing 37 M maximum depth log mode 37 maximum depth alarm 16 18 gauge mode 22 maximum time alarm 16 18 metric 4 metric or Imperial 21 mix changing underwater 28 mix number 16 mixes 5 17 N NDL 24 27 no decompression limit 24 27 O OLI 27 44 log mode 37 options computer mode 15 out of range warning 33 oxygen limit index 27 44 oxygen limit index warning 31 P PC transfer mode 4 41 entering ...
Page 57: ...9 time and date 13 size and weight 5 specificatons 5 surface interval time 43 surface mode 12 43 entering from another mode 12 T temperature 28 log mode 37 thermometer 5 time dive time alarm 18 stop time 32 time and date setting 13 time mode 13 time of day 12 13 28 W warnings 6 ascent rate 29 decompression stop violation warning 33 decompression warning 32 default warning 29 diving mode 29 low bat...
Page 58: ...Index 54 NiTek He Dive Computer User Manual ...
