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Summary of Contents for Crest Audio CRF
- Page 1 CREST CRF English User Guide Applicable SW version: SWV300 Version number: V 1.0 Update date: 2024/10/01...
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Page 2: Table Of Contents
CRF English User Guide Contents 1. Diving Safety Guide 2. Getting Started Guide 2.1 Maintenance 2.2 Buttons 2.3 Display Screen Explanation 2.4 Low Battery 3. Mode Selection 4. Time Mode 5. Dive Mode 6. Log Mode (Record) 7. Alarm Mode 8. -
Page 3: Diving Safety Guide
1. Diving Safety Guide Please ensure that you fully understand how to use your dive equipment and the CRF dive function and what the information displayed on this product means. If you have any questions about this product, please always contact your CREST dealer for answers prior to your diving activity and use. - Page 4 recreational diving only. CREST strongly recommends that recreational divers do not exceed the maximum depth of 40 m/131 ft specified for recreational diving (air diving), or the maximum depth allowed by your dive training, and do not use it in diving environments where you are not trained to dive within the depth limits of your training.
- Page 5 accepted as an integer, please do not remove the decimal point by yourself when inputting. The recommended input method is the unconditional rounding method, for example, if your cylinder measurement is 31.8%, please input the oxygen concentration value: 32%. The decimal point will be underestimated and will result in incorrect calculation of the dive information, which may lead to life threatening divers.
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Page 6: Getting Started Guide
2. Getting Started Guide 2.1 Maintenance 1. Storage: Please keep this product in a cool place, do not place it in a dangerous environment, squeeze, heavy pressure, high temperature, low temperature, high humidity, easy to drop, heavy impact, etc. If the product is not used for a long time, please make sure that the power supply is at least 50%, and check and charge it regularly. -
Page 7: Buttons
2.2 Buttons In this manual, the buttons will be represented by the letters shown in the illustration. Buttons Function Description Setting / Stop Mode Back Light / - Start / + 頁 7... -
Page 8: Display Screen Explanation
Display Screen Explanation Low Battery The CRF shows when the battery is low, indicating a need for replacement. 頁 8... -
Page 9: Mode Selection
3. Mode Selection SCREEN FUNCTIONS ● Press "B" to change the mode in the following sequence: Time Mode → Dive Mode → Log Mode → Alarm Mode → Timer Mode → World Time Mode → Metronome Mode → Stopwatch Mode. ●... - Page 10 Alarm Mode Screen Description： Five sets alarm Hourly chime Timer Mode Screen Description： Countdown timer range：99:59'59" World Time Mode Screen Description： Second time zone time Metronome Mode Screen Description： 18 types of beats (10~320) Stopwatch Mode Screen Description： 1/100 second accuracy 8 Sets of Lap，Split Time Range：0'00"00~99:59'59"...
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Page 11: Time Mode
4. Time Mode Set Time Step 1 In Time Mode, press and hold “A” until the city code starts flashing (flashing indicates you have entered the setup screen). Step 2 Press “C” or “D” to select the city code. Press and hold to adjust quickly. Step 3 Press “B”... - Page 12 Tone (ON/OFF) → Alarm (ON/OFF) → Timer (ON/OFF) → World Time (ON/OFF) → Metronome (ON/OFF) Step 6 Once the settings are complete, press “A” to exit the setup mode (the day of the week will automatically adjust after setting the year, month, and date). When the key tone (“BEEP”) is set to “OFF,”...
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Page 13: Dive Mode
5. Dive Mode Set Diving Step 1 Press and hold “A” until the unit starts flashing (flashing indicates you have entered the setup screen). Step 2 Press “C” or “D” to select between Metric or Imperial units. Step 3 Press “B” to select the next setting item. -
Page 14: Free Diving
Step 6 Once the settings are complete, press “A” to exit the setup mode. Dive Depth Setting: setting range: 0.0, 3.0–100 meters or 0, 10–328 feet. Default value: 0.0 meters or 0 feet. Dive Duration setting range: 0’00”–59’59”. Default value: 0’00”. Free Diving Step 1 In Dive Mode, dive depth... - Page 15 Step 4 Repeat Step 2 and Step 3 to perform multiple dive timings (up to 99 times). In surface interval timing mode, press “D” to view the following items in sequence: •Maximum Depth of Last Dive, Dive Duration → Current Temperature, Dive Duration →...
- Page 16 the “B” button to switch to Time Mode (Dive Mode will be turned off). 頁 16...
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Page 17: Log Mode (Record)
6. Log Mode (Record) Screen functions Screen Description： In Log Mode, press “A” to select the following items in sequence: Total Log → Log 1~Log 30. Review Screen Description： In the Total Log state, press “C” or “D” to view the following items in sequence: •Maximum Dive Depth, Total Dive Duration →... - Page 18 Interval → Average Dive Depth, Dive Duration, Surface Interval. Screen Description： In Log 2 state, press “C” or “D” to view the following items in sequence: •Date, Maximum Dive Depth, Dive Duration → Date, Temperature of Maximum Dive Depth, Dive Duration.
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Page 19: Alarm Mode
7. Alarm Mode Screen functions Note： The alarm will sound for 60 seconds at the set time each day. Press any button to stop the alarm. Alarm and Hourly Chime Step 1 In Alarm Mode, press “A” to select between Hourly Chime and Alarm 1~Alarm 5. - Page 20 Step 2 Press “D” to increase the hour, and press “C” to decrease the hour. Press and hold for quick adjustment. Step 3 Press “B” to select the minutes. Step 4 Press “D” to increase the minutes, and press “C” to decrease the minutes.
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Page 21: Timer Mode
8. Timer Mode Set Timmer Step 1 In Timer Mode, press and hold “A” until the hour starts flashing (flashing indicates you have entered the setup screen). Step 2 Press “D” to increase the hour, and press “C” to decrease the hour. Press and hold for quick adjustment. - Page 22 Step 6 Once the settings are complete, press and hold “A” to exit the setup mode. Use Timmer Step 1 Press “D” to start the timer. Step 2 Press “D” again to pause the timer. A reminder sound will play when the timer reaches the last 60, 50, 40, 30, 20, 10, 5, 4, 3, 2, and 1 second.
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Page 23: World Time
9. World Time Screen functions Set World Time In World Time Mode, press “C” to select the previous time zone, and press “D” to select the next time zone. Press and hold for quick adjustment. Turn Daylight Saving Time (DST) On/Off In World Time Mode, press and hold “A”... - Page 24 頁 24...
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Page 25: Metronome Mode
Metronome Mode Metronome Setting Step 1 In Metronome Mode, press and hold “A” until the beat count starts flashing (flashing indicates you have entered the setup screen). Step 2 Press “C” or “D” to select the beats per minute (BPM) in the following order: 10→20→30→40→50→60→70→80→... - Page 26 Step 2 Press “D” again to stop. 頁 26...
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Page 27: Stopwatch Mode
Stopwatch Mode Set Stopwatch Type Step 1 In Stopwatch Mode, press and hold “A” until “SPL” or “LAP” starts flashing (flashing indicates you have entered the setup screen). Step 2 Press “C” or “D” to select either “SPL” or “LAP.” Step 3 Once the settings are complete, press “A”... - Page 28 Step 2 Press “A” to stop the timing. Step 3 Press “A” again to reset the stopwatch time. Split Timing Step 1 In Stopwatch Mode, press “D” to start the timing. Step 2 Press “D” again to display the SPL1 time, and after 2 seconds, it will resume the timing.
- Page 29 Step 4 Press “A” to stop the timing. Split Timing Review Step 1 When there are split times recorded, press “C” in Stopwatch Mode to display the first Split time. Step 2 Press “D” to review SPL1 to SPL8 times. Step 3 SPL8 Press “C”...
- Page 30 Multi-Split Timing Step 1 In Stopwatch Mode, press “D” to start the timing. Step 2 Press “D” again to display LAP1 time, and after 2 seconds, it will resume the timing. Step 3 Repeat Step 2 to sequentially display LAP1 to LAP8 times. Step 4 Press “A”...
- Page 31 Step 2 Press “D” to review LAP1 to LAP8 times. Step 3 Press “C” to review LAP8 to LAP1 times. Step 4 Press “A” or “B” to return to Stopwatch Mode. 頁 31...
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Page 32: Backlight
Backlight Screen functions ● The backlight that uses an EL(electro-iluminescent) causes the display to glow for easy reading in the dark. Backlight In Time Mode, press “C” to activate the backlight for approximately 3 seconds. 頁 32... -
Page 33: Serial Number
Serial Number Serial Number Serial Number Marking: The serialv number is laser-engraved on the metal section of the back of the dive computer watch (as shown in the red box in the left image). This serial number is essential for product registration, warranty, and repair services. -
Page 34: Disclaimer
14.1 User Responsibility This device is intended for recreational use only. CREST CRF is not applicable for measurement data or use specifications that require compliance with occupational or industrial requirements. 14.2 About Flying After Diving The no-fly time is displayed in watch mode, with an icon of the aircraft at the bottom of the screen. -
Page 35: Limited Liability Warranty
15. Limited Liability Warranty CREST Dive Computer is covered by CREST’s limited warranty. ● CREST provides a limited product warranty to the purchaser of a dive computer watch and dive computer watch accessories (hereinafter referred to as the Product). ● During the period of the Product Warranty, improvements will be made at CREST or CREST authorized distributor or dealer location for possible defects in the hardware of the Product in accordance with the terms of this Warranty. - Page 36 5. any failure caused by the use of services, software, accessories or any related products not provided by the original manufacturer; or any failure caused by the use of CREST products for purposes other than those for which they were originally designed.
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Page 37: Contact Crest
warranty period in order to claim warranty rights, and CREST cannot guarantee that the product will operate uninterrupted or error-free, or that the product will be compatible with hardware or software supplied by other vendors. 16. Contact CREST EMAIL：info@crestdiving.com WEBSITE : www.crestdiving.com 17. -
Page 38: Diving Terms And Explanations
Temperature Resolution: 1 °C / 1 °F display Display range: 0 °C to 40 °C / 32 °F to 104 °F interval Accuracy: ±2 °C / ±3.6 °F (within 20 minutes of temperature change) Calendar Accuracy: ±25 sec/month (at 20 °C / 68 °F) Clock 12/24 Switching Oxygen concentration: 21 % to 99 %... -
Page 39: Ncc Warning
Decompression sickness (abbreviated DCS; also called divers' disease) is a medical condition caused by dissolved gases emerging from solution as bubbles inside the body tissues during decompression. DCS most commonly occurs during or soon after a decompression ascent from underwater diving, but can also result from other causes of depressurisation. - Page 40 digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
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