Garmin GTEMP10-TH Thru-hull Temp Sensor Installation Instructions - Page 2

Thru-hull Temperature Sensor Configuration

Page 2 highlights

2 Examine the pilot hole on the outside of the boat, and select an option: • If the pilot hole is not in the correct location, seal the hole with epoxy and repeat step 1. • If the pilot hole is in the correct location, use a 25 mm (1 in.) hole saw to cut a hole from the outside of the boat through the outer fiberglass skin only. Do not cut completely through the hull. 3 On the inside of the boat, at the pilot hole location, use a hole saw to cut a hole 9 to 12 mm (3/8 to 1/2 in.) larger than the hole you cut in the outside of the boat in step 2. Cut through the inner fiberglass skin and most of the core, without cutting the outer skin. NOTE: When cutting the inner fiberglass skin and core, be careful to not cut the outer fiberglass skin, or you will not be able to correctly seal the hull. 4 Remove the inner fiberglass skin and core you cut in step 3. You should be able to see the inside of the outer fiberglass skin. 5 Sand the inside of the hole and the areas immediately around both the inside and outside fiberglass skin. 6 Clean the area using a mild detergent or weak solvent, such as isopropyl alcohol, to remove any dust and dirt. Sealing the Core with Fiberglass 1 From inside the boat, coat a layer of fiberglass cloth with fiberglass resin and place it inside the hole to seal the core. 2 Add layers of fiberglass cloth and resin until the hole is 25 mm (1 in.) in diameter. 3 After the fiberglass has hardened, sand and clean inside and around the hole. The cored-fiberglass hull is now prepared, and you can complete the sensor installation. Sealing the Core with Casting Epoxy Before you can seal the core with casting epoxy, you must create a cylinder with a diameter of 25 mm (1 in.) to act as a spacer as the epoxy sets. 1 Coat a 25 mm (1 in.) cylinder with wax. 2 From outside the boat, insert the cylinder into the hole, and tape it in place on the outer surface. 3 Fill the space between the cylinder and the core with casting epoxy. 4 After the epoxy has hardened, remove the cylinder, then sand and clean inside and around the hole. The cored-fiberglass hull is prepared, and you can complete the sensor installation. NMEA 2000 Connection NMEA 2000 thru-hull temperature sensor À NMEA 2000 device Á Drop cable  T-connector à Existing NMEA 2000 network Ä Thru-hull Temperature Sensor Configuration For instructions on finding the NMEA 2000 device list, see your compatible Garmin chartplotter or instrument manual. Assigning a NMEA 2000 Temperature Source 1 From the NMEA 2000 device list, select the NMEA 2000 thru- hull device. 2 Select a device. 3 If necessary, select Review or Config.. 4 Select Temp. Source. 5 Select the location of the temperature sensor. Configuring the Temperature Offset When the temperature data displayed on the gauge connected to your NMEA 2000 device is not the same as temperature data displayed on other devices, you can configure the temperature offset to compensate for the temperature reading from the sensor connected to the gauge. 1 From the NMEA 2000 device list, select the NMEA 2000 thru- hull device. 2 Select a device. 3 If necessary, select Review or Config.. 4 Select Temp. Offset. 5 Enter a value, in degrees. NOTE: Enter the temperature offset value as a positive number when the sensor measures the water temperature as being colder than it actually is. Enter the temperature offset value as negative when the sensor measures the water temperature as being warmer than it actually is. 6 Select Done. Troubleshooting the Sensor Number When multiple adapters are assigned to a NMEA 2000 temperature source, each adapter is assigned a unique sensor number automatically. If an invalid NMEA 2000 temperature configuration error message appears, you must assign a unique sensor number to each adapter manually. 1 From the NMEA 2000 device list, select the NMEA 2000 thru- hull device. 2 Select a device. 3 If necessary, select Review or Config.. 4 Select Sensor Number. 5 Select a sensor number. 6 Select OK. Configuring the Temperature Source when the Location Is Not Displayed 1 From the NMEA 2000 device list, select the NMEA 2000 thru- hull device. 2 Select a device. 3 If necessary, select Review or Config.. 4 Select Generic Config.. 5 Enter TEMPSOURCE=. 6 Enter a temperature source value based on the location of the temperature data source, followed by Done. For example, enter TEMPSOURCE=6Done for a temperature data source placed in a bait well. 2

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2
Examine the pilot hole on the outside of the boat, and select
an option:
If the pilot hole is not in the correct location, seal the hole
with epoxy and repeat step 1.
If the pilot hole is in the correct location, use a 25 mm (1
in.) hole saw to cut a hole from the outside of the boat
through the outer fiberglass skin only. Do not cut
completely through the hull.
3
On the inside of the boat, at the pilot hole location, use a hole
saw to cut a hole 9 to 12 mm (
3
/
8
to
1
/
2
in.) larger than the
hole you cut in the outside of the boat in step 2.
Cut through the inner fiberglass skin and most of the core,
without cutting the outer skin.
NOTE:
When cutting the inner fiberglass skin and core, be
careful to not cut the outer fiberglass skin, or you will not be
able to correctly seal the hull.
4
Remove the inner fiberglass skin and core you cut in step 3.
You should be able to see the inside of the outer fiberglass
skin.
5
Sand the inside of the hole and the areas immediately around
both the inside and outside fiberglass skin.
6
Clean the area using a mild detergent or weak solvent, such
as isopropyl alcohol, to remove any dust and dirt.
Sealing the Core with Fiberglass
1
From inside the boat, coat a layer of fiberglass cloth with
fiberglass resin and place it inside the hole to seal the core.
2
Add layers of fiberglass cloth and resin until the hole is
25 mm (1 in.) in diameter.
3
After the fiberglass has hardened, sand and clean inside and
around the hole.
The cored-fiberglass hull is now prepared, and you can
complete the sensor installation.
Sealing the Core with Casting Epoxy
Before you can seal the core with casting epoxy, you must
create a cylinder with a diameter of 25 mm (1 in.) to act as a
spacer as the epoxy sets.
1
Coat a 25 mm (1 in.) cylinder with wax.
2
From outside the boat, insert the cylinder into the hole, and
tape it in place on the outer surface.
3
Fill the space between the cylinder and the core with casting
epoxy.
4
After the epoxy has hardened, remove the cylinder, then
sand and clean inside and around the hole.
The cored-fiberglass hull is prepared, and you can complete
the sensor installation.
NMEA 2000 Connection
À
NMEA 2000 thru-hull temperature sensor
Á
NMEA 2000 device
Â
Drop cable
Ã
T-connector
Ä
Existing NMEA 2000 network
Thru-hull Temperature Sensor Configuration
For instructions on finding the NMEA 2000 device list, see your
compatible Garmin chartplotter or instrument manual.
Assigning a NMEA 2000 Temperature Source
1
From the NMEA 2000 device list, select the NMEA 2000 thru-
hull device.
2
Select a device.
3
If necessary, select
Review
or
Config.
.
4
Select
Temp. Source
.
5
Select the location of the temperature sensor.
Configuring the Temperature Offset
When the temperature data displayed on the gauge connected
to your NMEA 2000 device is not the same as temperature data
displayed on other devices, you can configure the temperature
offset to compensate for the temperature reading from the
sensor connected to the gauge.
1
From the NMEA 2000 device list, select the NMEA 2000 thru-
hull device.
2
Select a device.
3
If necessary, select
Review
or
Config.
.
4
Select
Temp. Offset
.
5
Enter a value, in degrees.
NOTE:
Enter the temperature offset value as a positive
number when the sensor measures the water temperature as
being colder than it actually is. Enter the temperature offset
value as negative when the sensor measures the water
temperature as being warmer than it actually is.
6
Select
Done
.
Troubleshooting the Sensor Number
When multiple adapters are assigned to a NMEA 2000
temperature source, each adapter is assigned a unique sensor
number automatically. If an invalid NMEA 2000 temperature
configuration error message appears, you must assign a unique
sensor number to each adapter manually.
1
From the NMEA 2000 device list, select the NMEA 2000 thru-
hull device.
2
Select a device.
3
If necessary, select
Review
or
Config.
.
4
Select
Sensor Number
.
5
Select a sensor number.
6
Select
OK
.
Configuring the Temperature Source when the
Location Is Not Displayed
1
From the NMEA 2000 device list, select the NMEA 2000 thru-
hull device.
2
Select a device.
3
If necessary, select
Review
or
Config.
.
4
Select
Generic Config.
.
5
Enter
TEMPSOURCE=
.
6
Enter a temperature source value based on the location of
the temperature data source, followed by
Done
.
For example, enter TEMPSOURCE=6Done for a temperature
data source placed in a bait well.
2