Crest Audio CR5058 User manual

CREST CR-5
English User Guide
Applicable SW version: CR5058
Version number: V 3.0
Update date: 2022/08/30

CR-5 English User Guide
Contents
1. Diving Safety Guide 4
2. Getting Started Guide 7
2.1 Maintenance 7
2.2 Charging 7
2.3 Wearing CR-5 8
2.4 Forced Shutdown 8
2.5 Buttons 8
3. Watch Mode 9
3.1 Screen and Function 9
3.2 Information Page 11
3.3 History Record 14
4. Diving Mode 15
4.1 Scuba Mode 15
4.1.1 Scuba Mode Screen and Function 15
4.1.2 Scuba Mode Settings 23
4.2 Freediving Mode (Free Mode) 25
4.2.1 Freediving Mode Screen and Function 25
4.2.2 Freediving Mode Settings 28
4.3 Gauge Mode 29
4.3.1 Gauge Mode Screen and Function 29
4.4 Plan Mode 33
4.4.1 Plan Mode Screen and Function 33
4.5 Dive Spot Mode 35
4.5.1 Navigate Mode Screen and Function 35
4.5.2 Add Spot Mode Screen and Function 37
4.5.3 My Spot Mode Screen and Function 38
5. Sports Mode 39
5.1 Run Mode 39
5.2 Hiking Mode 42
5.3 Bike Mode 43
5.4 Swim Mode 45
5.5 Triathlon Mode 46
5.6 Work Out Mode 47
6. Settings 48
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6.1 Diving Settings 48
6.2 Sports Settings 50
6.3 System Settings 53
6.4 User Settings 56
6.5 Delete 56
6.6 Reset 56
6.7 About 57
7. Logs 57
8. Timer 58
9. Heart Rate Watch 58
10. Synchronization and APP 59
11. Fast Satellite Positioning 60
12. Disclaimer 60
12.1 User's Responsibility 60
12.2 About Flying After Diving 60
13. Limited Liability Warranty 62
14. Contact CREST 64
15. Copyright Statement 64
16. Appendix 65
16.1 Product Specifications 65
16.2 Diving Terms and Explanations 66
16.3 NCC Warning 67
16.4 FEDERAL COMMUNICATIONS COMMISSION INTERFERENCE STATEMENT 67
Page 3

1. Diving Safety Guide
1.1
Please ensure that you fully understand how to use your dive equipment and
the CR-5 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.
Remember, your safety is your responsibility, so please pay attention to all
details and do not ignore any signs of discomfort!
1.2
Please be sure to read and thoroughly understand the entire contents of the
CR-5 Diving Instruction Manual. Any confusion or negligence, failure to follow
the contents of the Instruction Manual, or failure to follow normal operating
practices may result in serious injury to life or even death.
1.3
The CR-5 diving function is designed for recreational diving use only, and
CREST strongly advocates that this device should not be used for commercial
or professional diving activities. Anyone engaged in commercial or professional
diving is often exposed to depths and conditions beyond those for which the
watch was designed, which may result in the occurrence of Decompression
Illness (DCI).
1.4
This product is not a substitute for formal diving education and training. Only
divers who have received formal training from a professional dive operator and
know how to operate the dive equipment should use this product.
1.5
Each dive may carry a risk of decompression sickness and even if you follow
your dive plan or the calculations of the dive plan and dive information shown
on this product, the product cannot anticipate and measure changes in
individual physiology. Therefore, divers should try to stay within the limits
indicated by the product.
1.6
It is recommended that you seek the consent of your physician before
engaging in diving activities. There is no algorithm, formula, theorem, dive
computer or dive program that can completely eliminate the chance of
decompression sickness or oxygen toxicity. Individual physiology varies
depending on environmental factors and therefore this product cannot fully
protect you from injuries associated with diving activities.
"The best way to completely avoid injuries associated with diving
activities is not to engage in them."
1.7
This product is not guaranteed to be in full functional condition at all times.
Always carry a depth gauge, pressure gauge, timer and hand gauge as backup
instruments and always compare your dive plan and check the remaining
residual pressure.
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1.8
This product is factory tested to a depth of 100 m/330 ft and is intended for
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.
"Your safety is your own responsibility, and to challenge risk is to
challenge your luck."
1.9
CREST strongly discourages recreational divers from engaging in diving
activities that require the performance of decompression, or diving above the
No Decompression Limit (NDL). Decompression diving activities require
specialist training and an adequate air supply.
As soon as you exceed the NDL or the product signals that you are
recommended to perform a decompression dwell, you should immediately stop
diving and begin a slow rise and decompression procedure. Please pay close
attention to the flashing digits, warning tone and vibration warning, and pay
attention to the ascent speed, dwell depth and time of the product, there may
be multiple recommended dwell depths and times, we suggest you follow the
instructions and complete the dwell.
1.10
This product can assist in calculating dive no-decompression limits etc., but it
does not mean that you can skip the dive planning process etc. If your dive
plan is more conservative, please always give priority to your dive plan.
1.11
To ensure that the display of the product is correct and complete, before each
dive, you should start the product correctly and check its functions, and make
sure that the battery power is sufficient, the oxygen concentration setting, the
personalization setting, and adjust other settings to make sure they are
compatible with your dive plan.
1.12
Any diving activity undertaken prior to the first activation of this product may
result in misleading information. If the product is left on the surface and not
dived with the diver, the dive computer meter will not provide accurate dive
planning and dive information calculations for subsequent dives.
1.13
Divers must not exchange or share this product with each other, and their
internal dive information must match the original user in order to ensure the
correctness of the dive plan and dive information displayed subsequently; their
internal information cannot be transferred to divers who do not wear it in its
entirety, and it cannot be used for subsequent repeat dives.
1.14
Before diving, please make sure that the settings of this product are correct and
fit your dive plan, e.g. the oxygen ratio of the gas to be used, and input them
into this product. Failure to personally confirm the contents of the oxygen
cylinder, or to set the correct personalized adjustment settings, may result in
incorrect calculation of the dive plan and dive information, and in severe cases
may result in the diver's life being in danger.
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1.15
The input value of the oxygen concentration percentage of this product is only
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.
1.16
Divers should avoid flying during the period when this product shows the
proposed no-fly countdown. You should also check that the ban is lifted before
flying. Flying or traveling to high altitude areas during the no-fly period may
significantly increase the risk of developing decompression sickness. Please
review the recommendations of the Diver Alert Network (DAN).
1.17
This device contains a lithium battery. To avoid the risk of fire or combustion, do
not attempt to disassemble, crush, puncture, or throw the device into a fire or
leave it in water for a long period of time. If the device is damaged and you
wish to dispose of it, please dispose of it properly or recycle it in accordance
with the regulations in your area.
Page 6

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. If the battery capacity and voltage are not used for a long time, it may cause
irreversible damage to the battery.
2. Do not disassemble the body or case of this product by yourself.
3. After use: Make sure to soak and rinse the product with water after use, especially
underwater or in seawater.
The recommended cleaning method is.
● Remove the watch from your hand and gently grasp it by the strap to place the
entire product in the water.
● Soak in water for about three to five minutes and then shake gently in the water to
allow water to flow into the crevices to clean the salt.
● Please do not hit the water vigorously.
● Do not use strong water jets to rinse.
● Do not use any cleaning solvent other than water to clean.
● After cleaning, put it back on your hand or leave it in the shade to dry naturally.
● After cleaning, please make sure that the charging hole is free of water and
completely dry before charging, otherwise there will be a risk of short circuit or
electric shock.
2.2 Charging
1. Please install the charging clip and charging cable to a USB output power source,
such as a mobile phone charger, mobile power, etc.
2. Please make sure that your power output device is a safe and qualified product. Do
not use a product from an unknown source or without safety certification regulations.
3. After confirming that the charging clip is connected to the power source, open the
charging clip and confirm the direction of the charging point.
4. When the device is connected to the power source, the battery status will be
displayed on the screen.
5. Charging time is recommended to be about one to three hours, and may take longer
for weaker transformers.
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2.3 Wearing CR-5
1. The GPS antenna is hidden underneath the screen. It is recommended to keep the
antenna pointing upwards to get a better signal when wearing it.
2. Because of the correctness of the optical heart rate component, please wear it 1-2cm
behind the wrist joint.
3. Avoid wrist rotations and palm opening and closing movements that will tug on the
wrist muscles at the beginning of the measurement.
2.4 Forced Shutdown
When your CR-5 is off, just press and hold the power button at the bottom left corner for
about 15-20 seconds, the CR5 will turn off forcibly, press the power button again and it will
turn on normally. If there is no response, it is possible that your CR-5 has run out of power.
Please connect the charging clip to your watch and let it charge for about 5 minutes and
try again.
2.5 Buttons
Button
Function
①
Backlight
-backlight On/Off
-press and hold for two
seconds for the backlight
to stay on
②
Back
-return
-power switch : press for
turn on and long press for
turn off
③
Up
-move up
④
Mode
-mode selection
-confirm selection
-pause (sport mode)
⑤
Down
-move down
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3.Watch Mode
3.1 Screen and Function
3.1Screen Functions
Digital time screen (start screen)
Pointer time screen (start screen)
Time Screen (Start Screen)
Start screen, the watch-face can enter the settings
to change.
(Path: Settings > Set System > Watch Face)
Access: Power on or press the back button on any
screen to exit to the top level.
Icon：
1.Pedometer：
Shows the current step count.
2.Surface interval：
Shows the current surface interval time.
Please note:
Before starting the diving activity, please make
sure that the required setting information of
this product has completed the relevant
settings, and return to the watch mode, to
confirm that the product has been correctly
powered on and then enter the water, in order
to correctly enter the water and automatically
start.
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Digital time screen (start screen)：
After Scuba and Gauge Mode
Pointer time screen (start screen)：
After Scuba and Gauge Mode
Time Screen (Start Screen)
After Scuba and Gauge Mode
Icon：
1.Surface interval：
Shows the current surface interval time.
2.No-fly time：
If this symbol appears, you are still within the no-fly
time after a dive, so do not travel by air or go to
higher altitudes.
Please refer to historical records and version
information for exact no-fly times.
3.No-dive time：
If this symbol appears, it means you are still in the
no-dive time after the dive, please do not dive
again.
Please refer to your dive history and version
information for the exact no-dive time.
Meanwhile, you will not be able to use the
following functions:
Scuba Mode, Freediving Mode, Plan Mode.
Digital time screen (start screen)：
Located in a high altitude environment
High Altitude Environment
Altitude Diving will apply automatically in the
environment of barometric pressure lower than 950
mBar for more than 5 minutes.
Icon will show in Watch Mode and Pre-Dive
Mode.
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Scuba Mode - Surface Preview：
Located in a high altitude environment
3.2 Information Page
3.2 Information Page
Compass Info
Compass Info
Access：Press the UP button once in watch mode
to access.
To view the compass information, please follow
the instructions on the watch screen to calibrate
the compass first.
This compass information page will also be used
for GPS positioning. When the GPS positioning is
completed, the latitude and longitude will be
displayed below the bearing angle digit.
Temperature Info
Temperature Info
Access：Press the UP button twice in watch mode
to access.
The temperature information shows the current
temperature and provides the temperature
variations within four hours.
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Altitude Info
Altitude Info
Access：Press the UP button three times in watch
mode to access.
The temperature information shows the current
altitude and provides the altitude variations within
four hours.
Barometer Info
Barometer Info
Access：Press the UP button four times in watch
mode to access.
The barometer information can view the current
barometric pressure and provide the barometric
pressure change data within four hours.
Battery and Time Info
Battery and Time Info
Access：Press the UP button five times in watch
mode to access.
Icon：
1. 98%：Battery current power in percentage
2. 19:14:52：Current time（hh：mm：ss）
3. Sunrise 06:25：Sunrise time today
4. Sunset 17:06：Sunset time today
5. 25.9：Current temperature
6. 37：Cumulative number of stairs
For time settings, please refer to 6.3 System
Settings.
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Heart Rate Monitor Info
Heart Rate Monitor Info
Access：If turn on the HR monitor function, press
the UP button two times in watch mode to access.
To turn on the heart rate monitoring information,
go to Settings > Set System > Heartbeat > HR
Monitor, and select On.
The watch will automatically measure your
heartbeat every 5 minutes when this function is
turned on, and you can monitor the change of
heart rate within 4 hours.
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3.3 History Record
3.3 History Record
Last Dive Log
Last Dive Log
Access：Press the DOWN button once in watch
mode to access.
Icon：(Hours: Minutes)
1. Year, month and day: the last dive log out of the
water
2. SI: Surface interval time accumulation
3. No Fly: No-fly time countdown
4. NO Dive: No-dive time countdown
Scuba History
Scuba History
Access：Press the DOWN button twice in watch
mode to access.
Icon：
1. Total Dives：All scuba logs accumulation
2. Total Time：The cumulative time log of all scuba
dives
3. Max Depth：the maximum depth in all scuba
diving logs
Freediving History
Freediving History
Access：Press the DOWN button three times in
watch mode to access.
Icon：
1. Total Dives：All freediving logs accumulation
2. Longest Time：The longest time in all freediving
logs
2. Max Depth：The maximum depth in all freediving
logs
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4. Diving Mode
4.1 Scuba Mode
4.1.1 Scuba Mode Screen and Function
4.1.1 Scuba Mode Screen and Function
Scuba Mode - Surface Preview
Scuba Mode - Surface Preview
Icon：
OC：abbreviation of Scuba mode, open-circuit
Scuba.
：is in the process of obtaining the surface
position of the entry point or the dive spot info by
satellite positioning.
The coordinates of latitude and longitude or the
name of the dive spot will be displayed after the
positioning is completed.
The surface GPS function is only available for
firmware CR5058 and above.
NORM：Conservatism level
Default: Normal (NORM). Available values: conservative
(CONS), normal (NORM), and aggressive (AGGR).
O2%：Oxygen percentage value.
PO2：Current setup of PPO2 (partial pressure of
oxygen).
Default: 1.4 / Setup range: 1.2 - 1.6
SI：current surface interval time.
(less than 10 hours: HOUR:MINUTE
After 10 hours: HOUR
After 24 hours: --)
MOD：Maximum Operating Depth suggestions.
Based on the set PO2 and the oxygen
concentration value of the gas used, the maximum
depth that the diver is allowed to dive to is
calculated.
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Surface Preview Twist-to-next Info
- SI/MOD
Surface Preview Twist-to-next Info
- Bearing
Surface Preview Twist-to-next Info
- Tissue Concentration
Scuba Dive Mode -
Surface Preview Twist-to-next Info
Description：
Twist-to-next feature detects a rotation of your wrist
and helps you turn the page automatically without
pressing a button while diving.
This feature is on by default and can be turned off.
(Path: Settings＞Set dive＞Twist to Next)
Press the mode button to view other information
pages.
Surface preview information: SI/MOD, Bearing,
Tissue Concentration.
Icons：
237°：the current pointing direction.
TISS%: 16 tissue concentration status.
Scuba Mode - Underwater
Scuba Mode - Underwater
Description：
020.6m：Current Depth
NDL：The Non-Decompression Limit time in
minutes, will show 99 when NDL exceeds 99
minutes.
：Ascent speed (3 means 3 m/min).
If it exceeds 10 meter/minutes, there will be an
alarm warning (short beeping repeated) with
vibration.
：Descent speed（3 means 3 m/min）
NO arrow icon: Diver is stationary.
09:25：Current time.
TIME：Dive time.
TEMP：Water temperature.
Page 16

Underwater Twist-to-next Info
- Dive Time/ Water Temperature
Underwater Twist-to-next Info
- Bearing
Underwater Twist-to-next Info
- Tissue Concentration
Scuba Dive Mode -
Underwater Twist-to-next Info
Description：
Twist-to-next feature detects a rotation of your wrist
and helps you turn the page automatically without
pressing a button while diving.
This feature is on by default and can be turned off.
(Path: Settings＞Set dive＞Twist to Next)
Press the mode button to view other info pages.
Underwater information:
Dive Time/ Water Temperature, Bearing, Tissue
Concentration.
Icons：
237°：the current pointing direction.
TISS%: 16 tissue concentration status.
Scuba Mode – Safety stop
(When the NDL has not been exceeded)
Scuba Mode – Safety stop
(When the NDL has not been exceeded)
Description：
004.6m：Current Depth
STOP：When divers ascend to 5m (16.4 ft), the
diver computer will start a Safety Stop
countdown automatically. If the diver does not
complete Safety Stop and ascent, there will be
an alarm warning (short beeping repeated) with
vibration, and this dive will end according to
Log Stop settings.
TIME: Dive time.
CEILING: The depth at which divers should ascend
to and remain.
TEMP：Water temperature.
Page 17

Scuba Mode – Safety stop finished
(When the NDL has not been exceeded)
Scuba Mode – Safety stop finished
(When the NDL has not been exceeded)
Description：
CLEAR: When divers finish Safety Stop at the
CEILING depth, the dive computer will show the
word CLEAR indicating that it is OK to perform a
slow ascent to the surface.
When the safety stop is completed, the watch
will vibrate twice, long buzz and the CLEAR will
flicker twice.
：Ascent speed (03 means 3 m/min).
：Descent speed（03 means 3 m/min）
NO arrow icon: Diver is stationary.
09:25：Current time.
TIME：Dive time.
TEMP：Water temperature.
Scuba Mode – Underwater
When the NDL has been exceeded
(first three minutes)
Scuba Mode – Underwater
When the NDL has been exceeded
(first three minutes)
Description：
NDL：The Non-Decompression Limit time in
minutes, will show 99 when NDL exceeds 99
minutes.
If it reaches 4 minutes remaining, there will be
an alarm warning (short beeping repeated) with
vibration. Divers should ascend slowly and end
your dive.
When exceeds NDL time, the first 3 minutes will
be shown in:
- minutes: seconds
CEILING: The depth at which divers should ascend
to and remain when they are required to perform
decompression stops.
Page 18

Scuba Mode – Underwater
When the NDL has been exceeded
(after three minutes)
Scuba Mode – Underwater
When the NDL has been exceeded
(after three minutes)
Description：
DECO：The time has exceeded the NDL.
When 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.
Scuba Mode – Underwater
When exceeding the NDL and ascent to
ceiling depth.
Scuba Mode – Underwater
When exceeding the NDL and ascent to ceiling
depth.
Description:
STOP: (Decompression Stop)
After reaching CEILING depth, the remaining
amount of time indicated on the screen will be
displayed as a countdown timer. Please remain
at the ceiling depth the entire duration indicated
by the countdown timer if you have enough air
and no other potential risks are evident.
If you do not remain at the ceiling depth for the
entire duration indicated by the countdown
timer, there will be an alarm warning (short
beeping repeated) with vibration.
CEILING: The depth at which divers should
ascend to and remain when they are required to
perform all decompression and safety stops.
Page 19

Scuba Mode – Underwater
When reaching the depth indicated for
Decompression/Safety Stop
or Decompression Stop but no Stops are
performed
Scuba Mode – Underwater
When reaching the depth indicated for
Decompression/Safety Stop
or Decompression Stop but no Stops are
performed
Description:
OVER：After reaching the depth indicated for
Safety Stop/Decompression Stop but divers do
not perform Stops, it will blink and there will be
an alarm warning (short beeping repeated) with
vibration.
Please remain at the ceiling depth the entire
duration indicated by the countdown timer if
you have enough air and no other potential risks
are evident.
Scuba Mode – Underwater
When exceeding the NDL,
and Decompression or Safety Stop
at CEILING depth has ended.
Scuba Mode – Underwater
When exceeding the NDL,
and Decompression or Safety Stop
at CEILING depth has ended.
Description:
CLEAR: When divers finish all decompression and
safety stops at ceiling depth, it will show CLEAR
and indicate divers can now slowly ascend to the
surface.
PO2: when accumulated PO2 calculation
exceeds your PO2 setting, it will show the
current accumulated PO2 value.
If accumulated PO2 calculation does not exceed
your PO2 setting, it will show current time.
Scuba Mode – Return to the Surface
Scuba Mode – Return to the Surface
When you return to the surface, the dive will be
automatically ended according to the Log Stop time
setting, you cannot use any button to stop or exit
before the recording is completed.
Page 20