Owner's Manual

Alert
Message
Cause Device Action
%1 has a
low battery.
Fewer than 20 hours of dive
time remain. "%1" is
replaced with the
transmitter name.
The transmitter name
flashes BATT. LOW when
the battery is critically low.
The paired dive computer
vibrates and plays a
warning tone.
NO COMMS Your paired dive computer
has lost communication
with the transmitter for 60
seconds.
The transmitter name
flashes NO COMMS,
dashed lines replace the
tank pressure value, and
the tank pressure value
flashes red.
The paired dive computer
vibrates and plays a
warning tone if connection
alerts are enabled.
Enabling Lost Transmitter Alerts
Your paired dive computer can lose communication with the
transmitter when the transmitter is out of range, when the
transmitter signal is blocked by your body or that of another
diver, and when the transmitter loses battery power. You can
enable an alert that notifies you when your paired dive computer
has lost communication with the transmitter for 60 seconds.
1
On the paired dive computer, hold MENU.
2
Select Dive Setup > Air Integration > Connection Alert.
Device Information
Replacing the Descent T1 Battery
NOTICE
You should purchase a replacement battery only from a high-
quality manufacturer and a reputable vendor. Using a low quality
battery could result in poor product performance and reduced
battery life, especially at low temperatures. Do not use
rechargeable batteries. Rechargeable batteries may have a
higher voltage specification and can cause permanent damage
to the device.
To replace the battery, you need a coin or flat screwdriver, a
new 3 V CR123A lithium battery, and waterproof silicone
grease. You may also need a replacement battery cap
accessory.
The transmitter is powered by a 3 V CR123A lithium battery. A
battery is pre-installed at the factory. You must carefully follow
the battery replacement instructions to preserve the transmitter's
waterproofing.
1
Insert a coin or flat screwdriver into the slot , and rotate
counter-clockwise to unscrew the battery cap.
2
Remove the battery cap and battery.
3
Insert the new battery in the transmitter, with the positive pole
facing into the transmitter and the negative pole facing the
battery door.
4
Inspect both gaskets to verify they are clean, undamaged,
and fully seated in the grooves.
If the gaskets appear worn or damaged, you can purchase a
replacement battery cap kit, including a cap, pre-installed
gaskets, and silicone grease. Go to the Descent T1 product
page on garmin.com to purchase accessories.
5
Apply a thin layer of waterproof silicone grease to both
gaskets.
6
Replace the battery cap into the transmitter, and fully tighten
it.
Device Care
NOTICE
Do not grip the regulator or the transmitter to move, carry, or
adjust the air tank.
Do not remove the safety plug from the base of the transmitter.
Do not use a sharp object to clean the device.
Avoid chemical cleaners, solvents, and insect repellents that can
damage plastic components and finishes.
Thoroughly rinse the device with fresh water after exposure to
chlorine, salt water, sunscreen, cosmetics, alcohol, or other
harsh chemicals. Prolonged exposure to these substances can
damage the case.
Avoid extreme shock and harsh treatment, because it can
degrade the life of the product.
Do not store the device where prolonged exposure to extreme
temperatures can occur, because it can cause permanent
damage.
Discontinue use if the device is damaged or if it is stored at a
temperature outside the specified storage temperature range.
Discontinue use if there is water ingress into the battery
compartment. Even small amounts of water can cause corrosion
of the electrical contacts.
Cleaning the Transmitter
1
After each dive, rinse the transmitter with fresh water to
remove salt and debris.
2
If necessary, clean the transmitter with a soft cloth.
Specifications
Battery 3 V CR123A lithium
Battery life Up to 100 hr.
Thread type
7
/
16
in. (20 UNF)
Normal operating temperature From -20 to 60°C (from -4 to
140°F)
Underwater operating temperature From 0 to 40°C (from 32 to 104°F)
Storage temperature From -30 to 70°C (from -22 to
158°F)
Wireless frequency 2.4 GHz @ 0 dBm
Surface transmission range (ANT
wireless technology)
Up to 10 m (33 ft.)
Underwater transmission range
(sonar)
Up to 10 m (33 ft.)
Water rating 11 ATM
1
Pressure rating 300 bar (4351 psi)
Inspection interval Inspect parts before each use for
damage. Replace parts as
needed.
2
Getting More Information
You can find more information about this product on the Garmin
®
website.
• Go to support.garmin.com for additional manuals, articles,
and software updates.
• Go to buy.garmin.com, or contact your Garmin dealer for
information about optional accessories and replacement
parts.
1
The device withstands pressure equivalent to a depth of 110 m. For more
information, go to garmin.com/waterrating.
2
Aside from normal wear and tear, performance is not affected by aging.
Device Information 5