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Dive Rite NiTek He User Manual

He dive computer
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NiTek He Dive Computer
NiTek He Dive Computer
User Guide
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Summary of Contents for Dive Rite NiTek He

  • Page 1 NiTek He Dive Computer NiTek He Dive Computer User Guide Date of purchase: www.diverite.com...
  • Page 3 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 for other than registered owners.

  • Page 4: Table Of Contents

    Features and functions • 3 Specifications • 5 Warnings • 6 Chapter 2 Using the NiTek He • 9 Getting started • 10 Accessing display modes and screens • 11 Surface mode • 12 Time display and set mode • 13 Dive option set and display mode •...

  • Page 5: Introduction

    Chapter 1 Introduction Summary 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 •...

  • Page 6: Overview

    • Introduction: Covers the features and functions, specifications, and warnings for the NiTek He • Using the NiTek He: Covers the operation of each mode for the NiTek He • Care and maintenance: Covers how to properly care for and maintain the NiTek He and change the battery...

  • Page 7: Features And Functions

    Underwater, NiTek He users can switch between mixes at the push of a button. • The NiTek He is capable of functioning up to a depth of 394 feet (120 meters) when in dive computer mode and 656 feet (200 meters) when in gauge mode •...
  • Page 8 Special mode indicators makes it easy to determine what display 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 •...

  • Page 9: Specifications

    O2 setting: 1% increments He setting range: 0 to 92 percent He setting: 1% increments Dive log Dive logging: Maximum of 60 dives Profile logging: Maximum of 30 hours Profile sampling rates: 15 or 30 seconds NiTek He Dive Computer User Manual...

  • Page 10: Warnings

    • The NiTek He is designed for use by one diver at a time. Divers should not share a single NiTek He—or any other dive computer—on the same dive. Additionally, no diver...

  • Page 11: When Diving

    DCI. Use your NiTek He conservatively and in conjunction with other dive planning devices, such as dive tables. Do not rely on the NiTek He, or any similar device, as your sole means of avoiding decompression illness.
  • Page 12 (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: Using The Nitek He

    Chapter 2 Using the NiTek He Summary This chapter provides topics about using, setting, and understanding each of the modes and options of the NiTek He. Content Getting started • 10 Accessing display modes and screens • 11 Button operation • 11 Surface mode •...

  • Page 14: Getting Started

    Using the NiTek He Getting started The NiTek He has many modes and screens and a number of options that can be changed depending on your dive location and profile. The following is a checklist of general things that you should pay attention to before, during, and after a dive.

  • Page 15: Accessing Display Modes And Screens

    B button: This button is used to set an option’s setting, such as setting the date A (mode) button button The front of the NiTek He, showing the two buttons that are used to access and setup the different modes and options NiTek He Dive Computer User Manual...

  • Page 16: Surface Mode

    Using the NiTek He Surface mode Surface mode is the NiTek He’s default mode, with “SURF” displayed on the screen. The computer returns to this mode automatically upon surfacing from a dive and from other modes when two to three minutes of inactivity have passed.

  • Page 17: Time Display And Set Mode

    2. Release button B to return to surface mode. Setting the time and date Setting the time and date are done in the time set mode. You can enter or change the year, month, day, hours, minutes, and seconds in this mode. NiTek He Dive Computer User Manual...
  • Page 18 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. NiTek He Dive Computer User Manual...

  • Page 19: Dive Option Set And Display Mode

    Using computer mode Computer mode is when the NiTek He is operating in the normal computer mode. “DIVE” is displayed on the screen 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.
  • Page 20 (10) Dive log profile sampling rate: This is how frequently depth data is measured stored during a dive, which is 15 or 30 seconds. (11) Salt or fresh water: This is the setting for salt water or fresh water use. NiTek He Dive Computer User Manual...

  • Page 21: Setting Mix1 Through Mix7 Gas Percentages

    7. Press button B to set the O2 percentage you are setting for the selected mix number. Note: Maximum operating depth changes for the O2 percentage selected. 8. Press button A to select the He gas percentage. NiTek He Dive Computer User Manual...

  • Page 22: Setting The Maximum Depth Alarm

    2 seconds to return to surface mode. Setting the dive time alarm The NiTek He has a dive time alarm that is activated when the diver reaches the dive time that is set for the dive. When the dive time is reached, an audible alarm sounds and the screen flashes for three seconds.

  • Page 23: Setting The Dive Profile Sampling Rate

    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...

  • Page 24: Setting For Fresh Or Salt Water Use

    (salt or fresh water use) or to exit, press and hold button A for 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: •...

  • Page 25: Setting The Computer For Metric Or Imperial Operation

    If you try to dive the NiTek He when it is in default mode, an mode alarm sounds signaling that you should return to the surface and enter the correct gas percentages. If you ignore the warning and go diving anyway, your bottom time is going to be severely shortened and your decompression time severely lengthened.

  • Page 26: Using Gauge Mode

    See note earlier Using gauge mode If you do not want to use the NiTek He as a normal “dive computer,” the NiTek He has a gauge operation. Gauge operation is when the NiTek He is operating simply as a depth gauge and bottom timer.
  • Page 27 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. NiTek He Dive Computer User Manual...

  • Page 28: Plan Mode

    If the computer is in default mode, a series of horizontal lines appears. If the NiTek He calculates that there is residual nitrogen present from previous dives, the available no-decompression limits are shorter. Depending on how much residual nitrogen is present, no NDL time may be displayed for some deeper depths.
  • Page 29 Do not plan dives to depths deeper than those for WARNING: 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: Computer Mode

    (2) Maximum depth: This is the maximum depth that has been reached during the dive. (3) PO2: This is the partial pressure of O2 at your current depth. It is based on the FO2 settings for the mix selected. NiTek He Dive Computer User Manual...

  • Page 31: Second Underwater Screen

    Second underwater screen While underwater, you can change to the second diving mode screen that displays additional information. When you switch screens, time of day and temperature are displayed. NiTek He Dive Computer User Manual...

  • Page 32: Changing Gas Mixes Underwater

    2. Release button B to return to the 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.

  • Page 33: Warnings While In Diving Mode

    If you ascend and set the mix percentages, you can restart the dive. See “Understanding default mode” for more information. Ascent rate warning The NiTek He assumes that you keep your ascent rate within the following limits: Depth range Ascent rate 0 to 19 feet (0 to 5.9 meters)
  • Page 34 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 graph flashes in addition to the alarm and current depth and PO2 flashing. NiTek He Dive Computer User Manual...
  • Page 35 PGT graph flashes. Oxygen limit index (OLI) warning The NiTek He’s oxygen limit index (OLI) reflects the cumulative effect 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.
  • Page 36 There are a maximum of nine bars. When all bars are displayed, it means that you are at or have exceeded the no-decompression limits and have entered decompression. NiTek He Dive Computer User Manual...
  • Page 37 Exceed an actual bottom time of 599 minutes • Accrue a total ascent time of over 999 minutes The out-of-range warning consists of: • The audible alarm sounds for three seconds • The entire screen flashes NiTek He Dive Computer User Manual...
  • Page 38 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: Gauge Mode

    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 primary screen. NiTek He Dive Computer User Manual...

  • Page 40: Log Mode

    For each dive, the NiTek He stores information, such as depth, time, temperature, etc. in a log. This stored log information can be viewed directly from the NiTek He’s screen when in log mode. A to total of 30 hours or 60 dives can be stored.
  • Page 41 To view a dive log: 1. Press button A until “LOG” is displayed. 2. Press button B to enter the log mode screen. 3. Press button B to change to the second page number for a dive. NiTek He Dive Computer User Manual...
  • Page 42 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. NiTek He Dive Computer User Manual...

  • Page 43: Profile Mode

    Depending on what profile sampling rate you have set, either two depth readings (30-second rate) or four depth readings (15-second rate) are displayed for each minute during a dive. (4) Date: This the month and day of the dive. NiTek He Dive Computer User Manual...
  • Page 44 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. NiTek He Dive Computer User Manual...

  • Page 45: Pc Transfer Mode

    Using the NiTek He PC transfer mode If you purchased the optional personal computer interface for the NiTek He, you can transfer the stored dive log information to your PC. Before transferring the dive log You must complete the following before transferring the dive log.
  • Page 46 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. NiTek He Dive Computer User Manual...

  • Page 47: Surface Mode (Upon Surfacing From A Dive)

    PGT bar graph • Oxygen limit index (OLI) bar graph This information is displayed on both screens until the NiTek He calculates that it is no longer needed or after 24 hours have passed since the last dive. If you are making repetitive dives, you need to pay...
  • Page 48 It is recommended that you wait at least 24-hours WARNING: 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). NiTek He Dive Computer User Manual...

  • Page 49: Altitude Operation

    Using the NiTek He Altitude operation The NiTek He adjusts automatically for diving at altitudes of up to 19,685 feet (6,000 meters). To show that the NiTek He has made the altitude adjustment, it displays the altitude settings using symbols representing mountains.
  • Page 50 Do not place the NiTek He in dive mode when making sudden, substantial changes in altitude, such as when flying in an airplane. This can be caused by storing the NiTek He with wet dive gear, which can touch its external electrical contacts and cause it to enter dive mode.

  • Page 51: Care And Maintenance

    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 NiTek He Dive Computer User Manual...

  • Page 52: Proper Handling Techniques

    • Do not transport 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.
  • Page 53 Care and maintenance • Do not use compressed air to dry the NiTek He • Do not use the NiTek He in hyperbaric chambers if the device is not fully submerged in water do not store submerged in • Always rinse the computer with freshwater after use water •...

  • Page 54: Low Battery Warning

    All 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:...

  • Page 55: Index

    · 10 · 5 clock before a dive · 10 computer mode · 26 during a dive · 10 options · 15 diving mode · 26 computer mode · 15 gauge mode · 35 NiTek He Dive Computer User Manual...
  • Page 56 · 37 PGT limit warning · 31 maximum depth plan mode · 24 log mode · 37 PO2 · 16, 26 maximum depth alarm · 16, PO2 limit warning · 30 profile · 4 NiTek He Dive Computer User Manual...
  • Page 57 · 5 fresh or salt · 4 surface interval time · 43 salt or fresh water use · surface mode · 12, 43 entering from another mode · 12 year · 13 NiTek He Dive Computer User Manual...
  • Page 58 Index NiTek He Dive Computer User Manual...

Table of Contents