Faria IS0125 User manual

Fuel
Management
System
Owner’s Manual
•Displays Fuel Flow in GPH or LPH
•Total or Trip Fuel Used
•Low Fuel Alarm
•Calculates Fuel Remaining In Tank
•Gas Engines Only
IS0125 .
rev. E .
ECR#7218 03/2008

Contents
Specifications ....................................................................................... 4
Installation............................................................................................. 5
Location .............................................................................................. 5
Wiring Connection............................................................................... 6
Installation of the Fuel Flow Transducer............................................. 6
Instrument Setup .................................................................................. 7
Select units of measure ...................................................................... 7
Flow Averaging................................................................................... 8
Fuel Flow ............................................................................................ 9
Fuel Remaining Functions.................................................................. 9
Change Fuel Remaining value............................................................ 1
Set Low Fuel Alarm........................................................................... 10
Alarm activation ................................................................................ 10
Reset TRIP LOGs............................................................................. 10
Troubleshooting Chart....................................................................... 11
No display......................................................................................... 11
No flow reading indicated.................................................................. 11
Low flow reading indicated................................................................ 11
No fuel reading ................................................................................. 11
High or erratic reading ...................................................................... 11

4
Specifications
Size
Mount 21/16" diameter hole
Depth behind face plate3" min
Display 3-character LCD
Backlighting
Red colored diffused lighting for display.
Water Integrity
Front will withstand direct water spray.
Alarm
Audio and visual alarms indicate the
remaining fuel total has dropped below
a preset alarm value
Flow
0.5 to 34 US gallons per hour
2 to 129 liters per hour
0.4 to 28 imperial gallons per hour
The instrument may show erratic
readings or indicate 0 flow below .5 gph.
Logs
Logs record fuel used up to 999 display
units.
Both Trip Log and Total Log are saved
in memory at power down. Both Trip
Log and Total Log can be reset.
Fuel Remaining
User enters a fuel value into memory.
The quantity of fuel used is
automatically subtracted from the total.
This value remains in memory at power
down.
Operating Voltage
8 VDC to 16.5 VDC
Operating Temperature
0ºC to 50ºC (32ºF to 122ºF)
Current Drain
90 mA max. with supplied transducer.
Compliance/Certifications
<6 dB quieting on any marine radio
channel (with 3 dB gain antenna) within
one meter of the instrument. Complies
with CE EMC standards
EN50081-1 and EN50082-1 and FCC
Section 15.
Complies with International Standard
ISO 8846:1990(E).
- For use with gas engines only.

5
Installation
Always wire your Fuel Management Gauge into your boats ignition so that when the engine
is turned on, the gauge is recording the fuel used. If an accessory switch is used and you
forget to turn the unit on then the gauge will not have recorded the fuel used and will be
inaccurate. If you are unsure how to do this, contact a qualified marine electrician.
Location
The Fuel Management Gauge is
designed for above or below deck
installation. Select a position that is:
•On a flat surface
•At least 12" from a compass
•At least 20" from any radio
•Easy to read by the helmsman and
crew
•Protection from physical damage
•Accessible to electrical cable
connections.
IMPORTANT
A
lways install the Fuel Flow Transducer AFTER the primary filter. The primary
f
ilter must be
a good quality water separator type with a minimum filtration of 30 microns or better. (10 or 2
micron. The lower the micron rating the finer the filtration) Failure to provide this level o
f
filtration protection will result in inaccurate readings or total failure or damage to the
transducer. If there is not a suitable length of hose after the primary filter, an in-line filter (30
micron or better) should be fitted before the Fuel Flow transducer. Damage due to insufficient
filtration is not covered by warranty. If in doubt, please consult your local Marine dealer fo
r
advice prior to installation.
Mounting
•The instrument panel may be up to
3/4" in thickness.
•Drill a 21/16" hole in the instrument
panel.
•Remove brackets and insert the
instrument so the back is flush with
the instrument panel.
•Slide the back clamp over the
instrument and tighten mounting
nuts until secure.
2 1/16" Hole

6
•Keep electrical and transducer cables
away from alternator or other noise
generating electrical cables. Avoid
connecting the instrument to power
circuits that share loads with ignition,
alternators, inverters and radio
transmitters. Electrical power supply
connections should always be as short
as possible.
Wiring Connection
•Connect the fuel flow transducer to the gauge as follows:
Installation of the Fuel Flow Transducer
•
Connect the red wire from the gauge to
the positive supply through a 1 amp fuse
or a 1 amp circuit breaker. Connect the
green wire from the gauge to the
electrical ground.
The fuel flow transducer is designed fo
r
installation in Coast Guard approved 3/8"
flexible fuel line. The transducer MUST be
installed AFTER the main fuel filter. It should
be located well away from any area where it
will be affected by excessive heat or vibration
from the engine. It is preferable to mount the
transducer in a vertical position.
Drain all the fuel from the flexible fuel line.
Cut the fuel line and using the fuel hose
attaching clips provided install the
transducer so that the FUEL IN side of
the transducer connects to the fuel tank.

7
Instrument Setup
Select units of measure
The Fuel Management fuel flow meter can
display fuel values in US gallons, Liters or
Imperial gallons. To change the current
display setting, perform the following steps.
1. Power up the unit while holding key.
Press and hold during power up
2. Once the unit is on, release the key.
The current display setting is indicated as
pictured below:
3. To select another display setting, use the
up or down keys to change the value.
or
4. To save the change and exit this mode,
press and hold both keys simultaneously
for one second.
Press and hold for one second
The fuel values are now displayed using the
new setting.
Calibration
The fuel transducer supplied with the fuel
flow meter will provide readings at better
than 5% accuracy. Individual calibration
will increase this level of accuracy to better
than 2% over a fuel flow range of 2 to 32 US
gallons per hour.
While a properly calibrated unit should
provide accuracy within the published limits,
the user should also have a level sender o
r
fuel level gauge installed in the boat. This is
necessary due to possible operator induced
errors such as forgetting to reset the fuel
used when filling the tank, or other operato
r
controlled actions that may render the device
inaccurate. Perform the following steps to
calibrate your fuel flow meter:
1. Reset the total log value to zero(see pg 9)
2. Use a known amount of fuel. The larger
the amount the more accurate the
calibration will be.
3. Take note of the actual volume of fuel
used and the fuel used indicated by the
total log. If these two totals are different,
the instrument may require calibration.
4. Apply power while holding key.
Press and hold while applying power
5. Release the key. The display flashes the
current total log value.
6. Use the up or down key to change the
display and indicate the actual volume of
fuel used.
or
7. Press both keys simultaneously and hold
for 2 seconds to exit.
Press and hold for 2 seconds
The fuel flow meter is now calibrated.
AVG (which shows as AUG) is displayed.
To skip this function and return to normal
mode, hold both keys simultaneously fo
r
another 2 seconds

8
Flow Averaging
The Flow Averaging function sets the
time period over which the fuel flow is
averaged. The time period can be set in
the range of 1 to 99 seconds. Normally,
engines do not draw fuel from the tank
at a constant rate. An engine draws fuel
at a high rate for a short time until the
carburetor bowl or injection reservoir is
full and then draws no fuel for a few
seconds. If the true flow rate were
displayed, it would be too erratic to read.
Usually, a value of 10 -15 seconds gives
satisfactory results for two stroke
naturally carburetored engines. Four
stroke and engines that use electronic
fuel injection may require longer
periods. If the readings seem erratic,
you can increase the time period.
A long time period means the fuel
display will have a slow response time
and a more accurate reading. A short
time period means the display will have
a quick response time but an erratic
display reading. The flow time period
setting only affects the fuel flow display.
It does not affect the fuel used or fuel
remaining measurement in terms of
accuracy.
Flow Average Menu
Follow the steps outlined below to enter
the Flow Averaging Menu:
1.Press and hold the key while
applying power to enter the Fuel
Calibration menu.
2.Press and hold both keys
simultaneously for 2 seconds to enter
the Flow Filter mode.
3.The Fuel Flow Average Period menu
AVG is displayed briefly and then the
default value of 10 seconds is
displayed if you have not previously
changed it.
4.Use the up or down keys to change
the value between 1 and 99 seconds.
or
5.Press and hold both keys
simultaneously for 2 seconds to save
the new averaging time period and
return to normal operation

9
Operation
Fuel Flow
Fuel Remaining Functions
Press the key to cycle
through the possible functions.
Each time the key is pressed the
an identifier is displayed for 2
seconds before the value is
displayed.
Press the key to display the
current fuel flow rate
Change Fuel Remaining
To change the value of fuel
remaining in the tank press the
key until GAS is displayed.
After 2 seconds, the current
value is displayed.
Press and hold both keys for 2
seconds
The display begins to flash.
Use the up or down keys to
change the value.
or
Press and hold both keys for 2
seconds to save this new value
to memory and to exit this
function.
GAS is displayed and then the
new value.
Alarm activation

10
Set Low Fuel Alarm
To set the Low Fuel alarm, press key
until ALr is displayed
After 2 seconds, the current alarm value is
displayed.
If no alarm value has been entered, OFF
is displayed
Press and hold both keys for 2 seconds
until the display flashes.
Use the up or down keys to change the
value.
or
Press and hold both keys for 2 seconds to
save this new value to memory and exit
this function.
ALr is displayed and then the new value
with an arrow pointing at the alarm bell.
When the fuel remaining value
drops below the fuel alarm value,
the alarm sounds and the alarm
arrow flashes.
Press any key to mute the alarm.
The alarm arrow continues to flash
as long as the alarm condition
remains.
Reset TRIP LOGs
To reset a log, press the key
until the display indicates the name
of the log to be reset.
Press and hold both keys for 2
seconds.
The display shows trP or tot or for 2
seconds before resetting to zero.
The trip log value may be reset
without changing the total log
value. if the total log is reset to
zero, then the trip log will
automatically reset to zero.
Note: If the total log exceeds 999
then both it and the trip log will
be reset to zero.

11
Troubleshooting Chart
No display
1 Check DC power connections and DC polarity with voltmeter
2 Check fuse
No flow reading indicated
1 Check connection to flow transducer
2 Remove transducer from fuel line, blow through transducer and a whistling noise
will indicate the turbine is rotating.
Low flow reading indicated
1 Check your primary and secondary filters for obstructions. If no filters are fitted
this will lead to blockage and damage of flow transducer (see page 5).
2 Check that the calibration is correct.
No fuel reading
1 Check your primary and secondary filters for obstructions. If no filters are fitted
this will lead to blockage and damage of flow transducer (see page 5).
High or erratic reading
1 Check fuel connections are well made. Air in fuel lines will cause erratic or high
readings.

Copyright 2005 by the Thomas G. Faria Corporation, Uncasville CT
Faria® is the trademark of the Thomas G. Faria Corporation. All rights
reserved. No part of this publication may by reproduced in any form, in an
electronic retrieval system or otherwise, without the prior written permission
of the company.