Floscan Series 9700/97000 Standard Flow GPS Interface System (twin engine model) - Manual (Page 32)

08/26/08 7000-087-00G
Part III: Determining Optimum Tank Configuration & Cruise RPM
• Determine the optimum fuel tank configuration for your vessel. If possible, single engine vessels should draw and return fuel to a
single tank. On twin engine vessels, try to configure the fuel system so that each engine draws and returns fuel to its’ own
dedicated tank. If your twin engine vessel has only a single tank, equal consumption rates for both engines must be assumed.
• Close any cross connect or limber line valves between tanks during calibration.
• Take your vessel for a short cruise. Using the GPH, (LPH) reading as a guide, determine the best cruising RPM for the way you
normally operate. Don’t be concerned that the readings are slightly off. Calibration is most accurate when done at a single
cruising RPM.
Part IV: Final Calibration
• Return to the fuel dock and top off the fuel tank(s).
• Reset the totalizer so that the GALLONS, (LITERS) window reading is zero.
• Operate the generator under load, or take the vessel for a cruise.
Once underway, steam at your optimal cruising RPM,
(Determined in Part IIi). Consume a minimum of 20 to 30 gallons, (75 to 115 liters) of fuel per engine. Higher consumption gives
better accuracy.
• After consuming some fuel, return to the fuel dock and top off the fuel tank(s).
• Compare the Gallons, (Liters) window reading to the fuel pump reading.
• Calculate the percentage difference between the fuel pump & Gallons, (Liters) readings; (Refer to Examples I & II below).
• Determine if the totalizer is reading High or LOW.
• Rotate the Upper Black Switch until the GALLONS, (Liters) window matches the fuel pump reading.
• Starting at, “0” rotating the Upper BLACK Switch in a clockwise direction increases the Totalizer readings by 2% for each click.
• Rotating the switch in a counter-clockwise direction decreases Totalizer readings by 2%.
• Totalizer readings can be increased by 10%, or reduced by 20%.
Single Engine Vessels: Please refer to Example 1, Port system .
1
0
F
E
D
C
B
A
9
6
7
8
5
4
3
2
0%
2%
4%
6%
8%
10%
-2%
-4%
-6%
-8%
-10%
-12%
-14%
-16%
-18%
-20%
Upper BLACK switch
Example 1: Twin engine vessel with two, dedicated fuel tanks, (For single engine vessels with
a single tank, use either the Port or Starboard system calibration procedure in Example 1).
After steaming and returning to refuel. The Port tank took 89.7 gallons, (339.5 liters). Its’
totalizer reads 94.2 gallons, (356..5 liters). The Starboard tank took 93.2 gallons, (352.8 liters)
and its’ totalizer reads 87.9 gallons, (332.7 liters).
• Using the formula, calculate the percentage difference between the Totalizer reading and
actual fuel consumption.
x 100
Totalizer Reading
Difference in Gallons, (Liters)
Port System Calibration
• Find the difference between the totalizer and fuel pump readings:
[94.2 gallon, (356.5 liter) totalizer reading] – [89.7 gallon, (339.5 liter) pump reading] = 4.5 gallon, (170.3 liter) difference.
• Determine percentage difference between readings:
[4.5 gallon, (17.0) liter difference] ÷ [94.2 gallon, (356.5 liter) totalizer reading] = .047 x 100 = 4.7% Higher difference.
• To calibrate, rotate the Port MFI’s Upper Black Switch Counter-Clockwise to position E, reducing totalizer reading by 4%.
Starboard System Calibration
FloScan Instrument Company, Inc. Tel: (206) 524-6625 Fax: (206) 523-4961
3016 NE Blakeley Street, Seattle, WA 98105 Email: [email protected] Http://www.floscan.com