Garmin GFS 10 - Fuel Sensor User manual

September 2008 Part Number 190-00884-01 Rev. A Printed in Taiwan
GFS™ 10 Sensor Conguration Guide
See the Important Safety and Product Information guide in the product box for product warnings and
other important information.
The GFS 10 provides fuel-ow (volume/time) information for various screens, data elds,
or digital gauges of NMEA 2000
®
-compatible and Garmin
®
CANet
®
-compatible connected
display devices. For a list of compatible Garmin chartplotters and devices, visit
www.garmin.com.
Important: This document provides specic conguration information for the GFS 10
using your NMEA 2000-compatible or Garmin CANet-compatible display device (such as
a GMI
™
10 or GPSMAP
®
545). To access the NMEA 2000 or CANet device conguration
menu on your display device, consult the documentation provided with your display
device.
CAUTION: The GFS 10 is a sensor that helps you better determine the amount of fuel
used on your boat, and you should not rely solely on the GFS 10 for fuel-level information.
Carefully compare information displayed on the unit to all available fuel-level instruments
and sources.
Troubleshooting Fuel Gauge Type
When wired to a fuel gauge, the gauge type defaults to Auto Detect. If the fuel-level
reading on your Garmin chartplotter or marine instrument changes with the engine RPM,
the GFS 10 could be detecting the wrong type of gauge.
NOTE: The fuel level changes with the motion of the boat. Perform this test when the boat is
not moving.
To test the gauge-type setting:
1. When the boat is not moving, put the engine in neutral.
2. Use the throttle to increase the engine RPM. If the fuel-level reading changes with the
engine RPM, change the gauge type.
To change the gauge-type setting:
1. WhileviewingtheNMEA2000ortheCANetdevicecongurationmenu,selectthe
GFS 10 device.
2. Select Cong > Gauge Type.
3. Choose 1 Coil or 2 Coil and repeat the gauge-type setting test.
Troubleshooting the Fuel-Flow Rate
If the fuel-ow information received from the GFS 10 appears inaccurate, you can
manually adjust the fuel-ow reading.
To adjust the fuel-ow rate:
1. WhileviewingtheNMEA2000ortheCANetdevicecongurationmenu,selectthe
GFS 10 device.
2. Select Cong > Flow Adjustment.
3. Enter a positive or negative adjustment.
EXAMPLE: When you set the Flow Adjustment to +10% , a ow reading of 20 gal./hr.
(75 l/h) would change to a reading of 22 gal./hr. (82.5 l/h), because 20 gal. × 110% = 22 gal.
(75 l × 110% = 82.5 l).
Restoring Factory Default Settings
You can restore factory default settings to the GFS 10. You will lose all custom
conguration and calibration settings when you restore factory default settings.
To restore factory default settings:
1. WhileviewingtheNMEA2000ortheCANetdevicecongurationmenu,selectthe
GFS 10 device.
2. Select Cong > Factory Defaults.

Using Fuel-Flow Information With a Garmin Chartplotter
or Marine Instrument
CAUTION: The Garmin chartplotter or marine instrument must be powered on to calculate
remaining fuel based on the fuel-ow rate.
Important: When using the GFS 10 to calculate remaining fuel based on the fuel-ow
rate, you must specify the amount of fuel each time you add fuel to the tank.
To specify the amount of fuel added:
1. While viewing the fuel page or fuel instrument screen on your NMEA 2000 or CANet
device, select Menu.
2. Choose from the following options:
Fill Up Tank—set fuel level to the maximum capacity.
Add Fuel to Boat—specify the amount of fuel added.
Set Total Fuel Onboard—specify the amount of fuel currently available in the fuel
tank or tanks.
Changing the Fuel Economy Source
The Garmin chartplotter or marine instrument requires a speed sensor in addition to the
GFS 10 to calculate fuel economy.
To change the fuel economy source:
1. While viewing the fuel page or fuel instrument screen on your NMEA 2000 or CANet
device, select Menu > Fuel Economy Source.
2. Select either GPS Speed or Water Speed to specify which speed sensor is used to
calculate fuel economy.
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Using Fuel-Level Information With a Garmin Chartplotter
or Marine Instrument
To receive fuel-level information, connect the wiring harness on the GFS 10 to the fuel
gauge or fuel-level sensor of your boat according to the GFS 10 Installation Instructions.
To calibrate fuel-level information from the GFS 10:
1. Whileinstillwater,ontheNMEA2000orCANetdevicecongurationmenu,selectthe
GFS10devicethatisconnectedtothefueltankyouwanttocongure.
TIP: The serial number of each GFS 10 is shown on he NMEA 2000 or CANet device
conguration screen to help differentiate between multiple GFS 10 devices.
2. Select Cong > Level Calibration > Add Calibration Point and enter a calibration
point that corresponds to the current fuel level in that fuel tank.
Entering more calibration points will provide a more-accurate reading. For example,
enteringvecalibrationpoints(emptytank,1/4tank, 1/2tank, 3/4tank, and full tank) will
provideamore-accuratereadingthanenteringtwocalibrationpoints(emptytankand
full tank).
TIP: For a quick calibration, start with an empty tank, and enter calibration points as you ll
up the tank.
To reset the fuel-level calibration:
1. WhileviewingtheNMEA2000ortheCANetdevicecongurationmenu,selectthe
GFS10devicethatisconnectedtothefueltankyouwanttocongure.
2. Select Cong > Level Calibration > Reset Calibration.
Conguring Engine and Tank Information
If you have a multi-engine or a multi-tank setup on your boat, specify which engine or tank
is associated with each GFS 10.
TIP: The serial number of each GFS 10 is shown on the NMEA 2000 or the CANet device
conguration menu to help differentiate between multiple GFS 10 devices.
To congure tank and engine information for the GFS 10:
1. WhileviewingtheNMEA2000ortheCANetdevicecongurationmenu,selectthe
GFS10deviceyouwanttocongure,andselectCong.
2. Select from the following options:
Engine Number—for a multi-engine installation, assign the selected GFS 10 to a
specicengine.
Tank Number—foramulti-tankinstallation,assigntheselectedGFS10toaspecic
tank.
Tank Capacity—denethefuelcapacityofthefueltankthattheselectedGFS10is
connected to.
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