Floscan Series 9700/97000 Standard Flow GPS Interface System (twin engine model) - Manual (Page 33)

08/26/08 7000-087-00G
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
• Find the difference between the totalizer and fuel pump readings:
[93.2 gallon, (24.4 liter) fuel pump reading] – [87.9 gallon, (332.7 liter) totalizer reading]= 5.3 gallon, (20.1 liter)
difference.
• Determine percentage difference between readings:
(5.3 gallon, (20.1) liter difference) ÷ (87.9 gallon, (332.7 liter) totalizer reading) = .060 x 100 = 6% Lower difference.
• To calibrate, rotate the Starboard MFI’s Upper Black Switch Clockwise to position 3, increasing totalizer reading by 6%.
Example 2: Twin engine vessel with a single fuel tank.
Port System Calibration
After refueling the tank took 182.9 gallons, (692 liters). The Port Totalizer reads 94.2 gallons, (356.6 liters) and the Starboard reads
87.9 gallons, (332.7 liters). With a single tank, you must assume that each engine burned 91.5 gallons, (346.3 liters).
• Find the difference between the totalizer and fuel pump readings:
[94.2 gallon, (356.5 liter) totalizer reading] – [91.5 gallon, (346.3 liter) assumed burn) = 2.7 gallon, (10.2 liter) difference.
• Determine percentage difference between readings:
[2.7 gallon, (10.2 liter) difference) ÷ [94.2 gallon, (356.5 liter) totalizer reading) = .028 x 100 = 2.8% Higher difference.
• To calibrate, rotate the Port MFI’s Upper Black Switch Counter-Clockwise to position F, reducing its’ totalizer reading by 2%.
Starboard System Calibration
• Find the difference between the totalizer and fuel pump readings:
[91.5 gallon, (346.3 liter) assumed burn] - [87.9 gallon, (332.7 liter) totalizer reading] = 3.6 gallon, (13.6 liter) difference.
• Determine percentage difference between readings:
[3.6 gallon, (13.6 liter) difference] ÷ [87.9 gallon, (332.7 liter) totalizer reading] = .041 x 100 = 4.1% Lower difference.
• To calibrate, rotate the Starboard MFI’s Upper Black Switch Clockwise to position 2, increasing its’ totalizer reading by 4%.
This completes system calibration. The Instrument should be within 5% of actual consumption. Calibrating a second time should
bring it to within 3%, especially on twin engine, single tank vessels. Larger fuel burns increase calibration accuracy.
Drastically changing operating habits, (Changing from mostly cruising to mostly trolling) may affect totalizer accuracy. If this occurs,
re-calibration may be necessary.