Table 5-61 Fuel Page Settings; Fuel - Garmin GI 275 Installation Manual

5.7.5

Fuel

5.7.5.1 Fuel Quantity Calibration
The Fuel Quantity Calibration is performed in Configuration mode (EIS → Fuel → Quantity Cal or
Calibration/Test → Fuel → Quantity Cal). Ensure the settings on the Fuel page are configured.
CAUTION
Ensure the correct Fuel Quantity sensor configuration before calibration. If using a
GEA 24 with resistive fuel probes, the fuel quantity sensor must be configured as 0-5 Volt.
Refer to Appendix C.
This procedure is used to calibrate the GI 275 fuel quantity gauges. It begins with drained fuel tanks, then
unusable fuel is added, and then fuel is added in specified quantities during the fueling process. Tank
calibration takes time and cannot be interrupted once initiated. The Fuel Quantity Calibration procedure is
not required to be performed immediately following the setup of the fuel quantity gauge; however, it must
be completed before flight.
When determining the number of calibration points and amount of fuel to add at each, it is recommended
to take the total usable fuel capacity of each tank and divide it by a number of points that results in an
easily measurable amount of fuel to be added at each point (e.g., for a 24 GAL (of usable fuel) tank, divide
24 (gallons of usable fuel) by 6 (calibration points) to equal 4 (gallons of fuel to be added at each point).
Take that number of points (6 in this example) and add 1 more for the unusable fuel (Point 1). So, a tank
that holds 24 gallons of usable fuel could perform the calibration with 7 points, adding 4 gallons at each
point after the unusable fuel is added in the first point.
5.7.5.2 Required Information and Equipment
A calibrated/verified fueling system is required to add known quantities. The aircraft manufacturer's
information for aircraft leveling requirements/procedures and the unusable fuel quantity is required.
Table 5-61 is used as a guide to calibrate the fuel quantity gauge(s). If the installation does not include
auxillary tanks, set the Aux Tank field to None. Table 5-62 describes each of the settings during the
calibration of the fuel quantity.
190-02246-10
Rev. 11

Table 5-61 Fuel Page Settings

Setting
Main Tank
AUX Tank
AUX Label
Fuel Type
Full Capacity
Tab Capacity
Options
Single Main
Left & Right
None
Single AUX/Tip
Left & Right
AUX
Tip
Avgas
Jet A
Jet B
Refer to AFM/POH
Refer to AFM/POH
GI 275 Part 23 AML STC Installation Manual
Page 5-79