Crest Audio CR4 User Manual
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Crest Audio CR4 User Manual

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  • Page 1 Page 1...
  • Page 2 CREST CR-4 Dive Computer USER GUIDE Applicable to SW version C01-5C Page 2...

  • Page 3: Table Of Contents

    CREST CR-4 Dive Computer User Guide 1. Screen and Functions 1.1 Button function 1.2 Menu 1.3 Watch Mode and Dive History & System Information 1.3.1 Watch Mode 1.3.2 Dive History & System Information 1.3.3 Watch Mode Settings 1.4 Scuba Mode and Settings 1.4.1 Scuba Mode 1.4.2 Scuba Mode Settings 1.5 Freediving Mode and Settings...
  • Page 4 CR-4 Quick Start Guide Notice: To charge your CR-4 dive computer, first plug the cable into the Clip and use a safe, qualified USB adaptor and connect it to power supply. Do not use unsafe, unqualified USB adaptors. Then match the Clip to the contact points on the back of CR-4. Once it’s in place, you should see growing build up motion indicator of battery on the monitor.

  • Page 5: Screen And Functions

    1. Screen and Functions 1.1 Button function Name ： Up Button Name ： Power Locate： Right Top Button Locate： Left Top Func ： Move Func ： Power Pointer Up / Acees more Settings Switch / Exit Name ： Mode / Select Button Locate：...

  • Page 6: Menu

    1.2 Menu 1.2 Menu Description: Watch Mode To Access: Default mode when your turn To Exit: Press Power Button once. Description: Scuba Mode To Access: Under Menu, press Mode Button to select Scuba Mode. To Exit: Press Power Button once. Description: Freediving Mode To Access: Under Menu, press Mode Button to select Freediving Mode.
  • Page 7 1.2 Menu Description: Gauge Mode To Access: Under Menu, press Mode Button to select Gauge Mode. To Exit: Press Power Button once. Description: Plan Mode To Access: Under Menu, press Mode Button to select Plan Mode. To Exit: Press Power Button once. Description: Timer Mode To Access: Under Menu, press Mode Button to select Timer Mode.
  • Page 8 1.2 Menu Description: Dive Logs To Access: Under Menu, press Mode Button to select Log Mode. To Exit: Press Power Button once. Description: Settings To Access: Under Menu, press Mode Button to select Settings. To Exit: Press Power Button once. Description: Synchronization Mode (SYNC Mode) To Access: Under Menu, press Mode...

  • Page 9: Watch Mode And Dive History & System Information

    1.3 Watch Mode and Dive History & System Information 1.3.1 Watch Mode Description: Start Status when your turn on. Displays day of the week, current time and calendar date. To Access: Under Menu, press Mode Button to select Watch mode or press Power Button to go back to Start Status.
  • Page 10 1.3.1 Watch Mode ⚫ If you twist it to activate, dive computer will show Start Status display with backlight on for 30 seconds and resume Sleep Status. ⚫ If you press any key to activate, dive computer will resume Start Status. 4.
  • Page 11 Page 11...

  • Page 12: Dive History & System Information

    1.3.2 Dive History & System Information Description: Last Dive Displays latest dive log: Calendar date, Time; NO FLY: No FLY recommendation time countdown; NO DIVE: NO DIVE recommendation time countdown; SI: Surface Interval time counting (continues until diver starts a new dive). To Access: Under Watch Mode, press DOWN Button once.
  • Page 13 1.3.2 Dive History & System Information Description: VERSION Displays system information of dive computer. HW: Hardware version of dive computer SW: Software version of dive computer SN: Serial Number of dive computer To Access: Under Watch Mode, press DOWN Button four times. To Exit: Under Watch Mode, press DOWN Button four times.

  • Page 14: Watch Mode Settings

    1.3.3 Watch Mode Settings Description: Date Settings To Access: Under Watch Mode, press the UP Button once, and press UP Button / DOWN Button to locate the cursor and then press MODE Button once to select the desired settings. The values at the bottom of the screen will blink.
  • Page 15 1.3.3 Watch Mode Settings Button / DOWN Button to select and accept the selection with MODE Button. Note: Please be aware that this dive computer will not self-adjust for daylight savings time. Description: UTC Settings (Coordinated Universal Time Settings) To Access: Under Watch Mode, press the UP Button once, and press UP Button / DOWN Button to locate the cursor and then press MODE Button once to select...
  • Page 16 1.3.3 Watch Mode Settings Setup range: 12H / 24H Description: Auto Active Mode at depth (AUTO MODE) To Access: Under Watch Mode, press the UP Button once, and press UP Button / DOWN Button to locate the cursor and then press MODE Button once to select the desired settings.
  • Page 17 1.3.3 Watch Mode Settings Description: Language Settings To Access: Under Watch Mode, press the UP Button once, and press UP Button / DOWN Button to locate the cursor and then press MODE Button once to select the desired settings. The values at the bottom of the screen will blink.

  • Page 18: Scuba Mode And Settings

    1.4 Scuba Mode and Settings 1.4.1 Scuba Mode Description: Scuba Preview Mode Image on Top: Normal Display Image at bottom: Large Display OC: Open-Circuit Scuba : Battery Status 000.0 m: Current depth. CF: Conservative. 3 levels to select: CF-1(Conservative), CF-2(Normal), and CF-3(Aggressive).
  • Page 19 1.4.1 Scuba Mode Description: Scuba Under Water Mode Image on Top: Normal Display Image at bottom: Large Display 18.6m: Current Depth NDL: The Non-Decompression Limit time in minutes, will show 99 when NDL exceeds 99 minutes. ：Ascent speed in meter/minute. If diver exceeds 10 meter/minutes, there will be alarm warning (short beeping repeated)
  • Page 20 1.4.1 Scuba Mode Description: Scuba Under Water Mode – When the NDL has not been exceeded Image on Top: Normal Display Image at bottom: Large Display CLEAR: When divers finish Safety Stop at the CEILING depth, dive computer will show the word CLEAR indicating that it is OK to perform a slow ascent to the surface.
  • Page 21 1.4.1 Scuba Mode Description: Scuba Under Water Mode – When the NDL has been exceeded Image on Top: Normal Display Image at bottom: Large Display DECO: When exceed time passes over 3 minutes, it will show in: - minutes. CEILING: The depth at which divers should ascend to and remain when they are required to perform decompression stops.
  • Page 22 1.4.1 Scuba Mode Description: Scuba Under Water Mode - When exceeding the NDL, and Decompression stop at CEILING has ended. Image on Top: Normal Display Image at bottom: Large Display CLEAR: When divers finish decompression stop at ceiling depth, dive computer will show CLEAR and indicates divers can now slowly ascend to the surface.
  • Page 23 Description: Scuba Mode End Screen will show Dive Profile of current dive for approximately 1 minute. To check entire history dive logs and dive profiles, go to LOG Mode and press UP Button / DOWN Button to scroll up or down to view other logs, press MODE Button select designated dive and press UP...

  • Page 24: Scuba Mode Settings

    1.4.2 Scuba Mode Settings Description: Scuba Preview Mode Image on Top: Normal Display Image at bottom: Large Display To Access: Under Menu, press UP Button / DOWN Button to locate the cursor and then press MODE Button once to select Scuba Mode.
  • Page 25 1.4.2 Scuba Mode Settings Description: PO2 Setting To Access: Under Scuba Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button to locate the cursor at PPO2 and then press MODE Button to select. The PO2 value at the bottom of the screen will start blinking.
  • Page 26 1.4.2 Scuba Mode Settings WARNING: Please make sure you fully understand that changing this setting will affect algorithm calculations and the related risks. Description: SCUBA Depth Alarm Settings (SDPTH-ALM) – ON / OFF To Access: Under Scuba Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button to locate the cursor at SDPT-ALM and then press MODE Button to select.
  • Page 27 1.4.2 Scuba Mode Settings Default: ON Setup range: ON / OFF Description: SCUBA Depth Alarm Setting (SDPTH-THD) To Access: Under Scuba Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button to locate the cursor at SDPTH-THD and then press MODE Button to select.
  • Page 28 1.4.2 Scuba Mode Settings activate: long beeping repeated three times with vibration. Default: 50 minutes Setup range: 0 minute – 90 minutes Description: Sampling Rate To Access: Under Scuba Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button to locate the cursor at SAMPLING and then press MODE Button to select.
  • Page 29 1.4.2 Scuba Mode Settings needed. Press MODE Button to accept your selection. Default: 1.0 m (3.3 ft.) Setup range: 1.0 m (3.3 ft.), 1.5 m (4.9 ft.), 2.0 m (6.5 ft.), 2.5 m (8.2 ft.), 3.0 m (9.48 ft.) Note: This setting will automatically apply to Freediving Mode and Gauge Mode.
  • Page 30 1.4.2 Scuba Mode Settings NORMAL (Normal Display) / LARGE (Large Display) Description: EXIT Scuba Mode Setting To Access: Under Scuba Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button; until the cursor aligns with EXIT. Press MODE Button once.

  • Page 31: Freediving Mode And Settings

    1.5 Freediving Mode and Settings 1.5.1 Freediving Mode Description: Freediving Preview Mode FD: Freediving Mode 00: Total freediving counts within 11 hours TEMP：Water temperature 10:08: Surface time SI：Surface Interval LAST DPTH：Max Depth of previous dive LAST TIME: Dive Time of previous dive Description: Freediving Underwater Mode 011.5m: Current depth...
  • Page 32 1.5.1 Freediving Mode DEPTH：MAX Depth TIME：MAX Descent time Note: Maximum History Information will be Return-to-Zero after 11 hours. Description：Freediving Mode - Average Rate (Average Rate calculation are based on total freediving history executed with this dive computer within 11 hours.) To Access: Press DOWN Button twice times under Freediving Mode.

  • Page 33: Freediving Mode Settings

    1.5.2 Freediving Mode Settings Description: Freediving Time Alarm - ON/OFF To Access: Under Freediving Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button; until the cursor aligns with FTIME- ALM. Press MODE Button once. One of the FTIME-ALM options will be blinking at the bottom.
  • Page 34 1.5.2 Freediving Mode Settings Description: Freediving Surface Interval Alarm To Access: Under Freediving Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button; until the cursor aligns with FSI- ALM. Press MODE Button once. One of the FSI-ALM options will be blinking at the bottom.
  • Page 35 1.5.2 Freediving Mode Settings Description: Freediving Depth Alarm Setting To Access: Under Freediving Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button; until the cursor aligns with FDPTH- THD1 to FDPTH – THD3. Press MODE Button once.
  • Page 36 1.5.2 Freediving Mode Settings Description: Log Start at Depth Setting (Log Start) To Access: Under Freediving Preview Mode, press UP Button Or from SETTINGS, press UP Button / DOWN Button to locate the cursor at LOG START and then press MODE Button to select. One of the log start depth options will be blinking at the bottom.

  • Page 37: Gauge Mode

    1.6 Gauge Mode 1.6 Gauge Mode Description: Gauge Mode GA: Gauge Mode : Battery Indication 000.0m: Current depth AVG: Average Depth STPW: Stop Watch TIME: Dive Time TEMP: Water temperature. To Access: Press DOWN Button to calculate Average Depth automatically. STPW will Return-to-Zero and start calculating dive time in current stage.
  • Page 38 1.6 Gauge Mode Description: Gauge Mode – No Diving DIVE recommendation time countdown will show on the screen after a dive is completed under Gauge Mode. DO NOT continue diving activities during countdown. For exact NO DIVE recommendation time countdown please check Dive History page. Note: Scuba Mode, Freediving Mode and Plan Mode will remain locked during NO DIVE...

  • Page 39: Plan Mode

    1.7 Plan Mode 1.7 Plan Mode Description: Plan Mode Up Left Corner (O2%): Oxygen percentage value. CF: Conservative. 3 levels to select: CF-1(Conservative), CF-2(Normal), and CF-3(Aggressive). Default: CF-2. Depth (MOD): Maximum Operating Depth suggestions. NDL: The Non-Decompression Limit time in minutes, will show 99 when NDL exceeds 99 minutes.
  • Page 40 1.7 Plan Mode 4. To change related settings, please refer to: Scuba Mode and Settings. Description: Plan Mode – Warning When you reach the preset PO2 value, alarm warning will activate; long beeping one time with vibration and displayed PO2 value will blink. Note: Once there is a warning, adjusting your dive plan accordingly is highly...

  • Page 41: Timer Mode

    1.8 Timer Mode 1.8 Timer Mode Description: Timer Mode Press UP Button: Start / Pause Timer. Press MODE Button: Reset Timer. Note: 1. Timer Mode is suitable for practice. It will not generate dive log and will not take up memory capacity. 2.

  • Page 42: Log Mode

    1.9 Log Mode 1.9 Log Mode Description: Log Mode OC: Open Circuit Scuba mode diving history FD: Freediving mode diving history GA: Gauge mode diving history DATE: Dive Date and Time TEMP：Water temperature MAX：Max depth of the dive TIME: Dive time 002 / 002 : Log Number / Total Logs They are in chronological order.
  • Page 43 1.9 Log Mode Step 2: Go to SETTINGS and use LOG CLEAR function to clear all dive logs. Note: Download your dive logs regularly is highly recommended to avoid depletion and/or malfunction of memory. Search “Dive Story” on APPLE STORE and Google Pay Store for our application service: Page 43...

  • Page 44: Settings Mode

    1.10 Settings Mode 1.10 Settings Mode Please check page 14 to page 17. Watch Mode Settings Please check page 25 to page 30. Scuba Mode Settings Please check page 33 to page 36. Freediving Mode Settings Description: Unit Setting (UNIT) To Access: From SETTINGS, press the UP Button / DOWN Button until the cursor aligns with UNIT.
  • Page 45 1.10 Settings Mode 5 minutes, 10 minutes, 30 minutes. Note: Auto Power Off Settings only applies settings of Watch Mode. While using the dive computer to execute all diving mood, the screen will remain turned on. Description: Button Volume Setting (BUZZER) To Access: From SETTINGS, press the UP Button / DOWN Button until the cursor...
  • Page 46 1.10 Settings Mode Setup range: 5 levels of brightness (from the darkest to the brightest) 1 2, 3, 4, and 5. Note: Higher brightness settings will consume more battery power and will affect the running time of dive computer. Description: Vibration setting (VIBRATION) To Access: From SETTINGS, press the UP Button / DOWN Button until the cursor...
  • Page 47 1.10 Settings Mode Setup range: YES / NO WARNING: 1. Please make sure you fully understand that changing this setting will affect algorithm calculations and the related risks. DO NOT USE this function if you are not a certified diving instructor or you are not suggested to do so by a certified diving instructor or facility.
  • Page 48 1.10 Settings Mode calculation of previous dives existing on this dive computer will still be calculated. 3. Download your dive logs using our application service before clearing all dive logs is recommended. Search “Dive Story” on APPLE STORE and Google Pay Store for our application service: Description: Reset system (SYSTEM REST)
  • Page 49 1.10 Settings Mode Description: Reset all settings and clear all data (ALL REST) To Access: From SETTINGS, press the UP Button / DOWN Button until the cursor aligns with ALL RST. Press MODE Button once. One of the ALL RST options will be blinking at the bottom.
  • Page 50 清除設定功能比較表 Comparison Table of Clearing functions: 禁潛時間清 禁飛時間清 水面休息時 餘氮計算紀 潛水紀錄清 個人設定重 除重置 除重置 間清除重置 錄清除重置 除 置 NO DIVE NO FLY Time SI time Residual DIVE LOG Personal Time Clear Clear Clear Nitrogen Clear Settings Calculation Reset Clear 組織重置 ●...

  • Page 51: Synchronization Mode

    1.11 Synchronization Mode 1.11 Synchronization Mode Description: Synchronization Mode (SYNC) - Waiting for connection To Access: Under Menu, press Mode Button to select Synchronization Mode (Sync Mode). Dive computer will automatically go back to Watch Mode after 60 seconds if there’s no connection or you can press Power Button once to exit.

  • Page 52: Crest Contact Info

    2. CREST Contact info EMAIL: info@crestdiving.com WEBSITE: www.crestdiving.com Page 52...

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