Fuel 2100 Calibration

[QCR]

Can anyone give me a breakdown on how you went about calibrating your Navman Fuel 2100. Mine is always about 15 ltrs out (eg. the gauge will say it will take 70 ltrs to fill but it will take 55ltr approx) and I'm thinking I must be doing something wrong or misunderstanding the calibration setup instructions.
Thanks

[trilogy]

Hi
I calabrated mine with a 20 ltr tank and with the 200 ltr underfloor tank is normally acurate to a couple of ltrs.

Below is from the instruction sheet.

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
10.0 to 120 litres per hour. Use the following steps to
calibrate your fuel flow meter:
1. Reset the total log value to zero
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. Press and hold the key while applying power
Hold down during power up
5. Release the key. Display will flash current
total log value.


6. Use the or keys to make the display
indicate the actual volume of fuel used.
7. Press both keys simultaneously for 1 sec to
exit.
Press and hold for 1 second
The fuel flow meter is now calibrated.

[QCR]

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.

Thanks for your reply, I think I may be going wrong at this stage. The actual volumn of fuel used I think will be the amount it takes to fill the tank after the trip, compared to the gauge reading and these should then be made the same .
Am I on the right track now.
Thanks Again
QCR

[trilogy]

QCR
Hows it going, I think the 2100 is a great piece of equipment and all boats should have one fitted, but like most marine equipment sometimes need a bit of tweaking to get them working to their optimum .So hopefully with out rambling on too much, this is how I set mine up.
1. Get a portable fuel tank and fill with a measured 20 ltrs of fuel.
2. Reset the displays TRP TOT ALR and GAS to zero by holding down the FLOW and TOTAL buttons together for 3 seconds, till they flash then by holding the TOTAL button set to 0, each must be done individually. Then hold both buttons for 1 sec to reset.
3. Set the GAS to 20 for the ltrs in the portable tank.
4. Unhook the under floor tank and attach the portable tank, making sure the fuel is going through the transducer. The monitor should be set up so the fuel goes from the main tank to a water separator filter then through the transducer then to the motor. I attached the fuel line from the portable tank to the water separator.
5. Now go for a boat or fish somewhere safe and try use the full 20 ltrs in the tank if you keep a close eye towards the end you can stop when the tank is empty but there is still some fuel in the water separator. As the last bit can go through pretty quick and you may in fact run out of fuel, if not careful, its best to avoid bar crossing, shipping channels or places where it may not be safe to be out of fuel till you hook up the main tank again.
6. Then check the TOT on the monitor. If it says 20 then it is calibrated and is correct eg 20 ltrs actually used, monitor agrees. Now if there is a difference reset the TOT as in Para 2 to 20 ltrs. And now all is calibrated in theory to be accurate to 2 percent.
7. Then hook up the main tank, if you actually ran out of fuel pump up the bulb and away you go. Don’t start the motor on the main tank before calibrating the gauge as the TOT will be inaccurate and it will have to be done again.

Best of luck and let me know how you get on as when set up correctly allow you not only to know how much fuel used but how much at what revs you are using so the most economical speed is easy to find as in the higher revs an extra couple of MPH can add a heaps to the fuel usage.
The manual if you need one is available at:
http://www.navman.com/marine/support/manuals/index.html