Table 5-59 Gauge Minimum And Maximum Ranges; Figure 5-24 Gauge Range Marking Example - Garmin GI 275 Installation Manual

a.
The range markings of 5 PSI
and 110 PSI are not captured
within gauge presentation.
If a gauge range is not specified by the AFM/POH or other approved data, an appropriate range must be
defined based on the gauge function, as specified in Table 5-59.

Table 5-59 Gauge Minimum and Maximum Ranges

Gauge
If a new gauge is being added, configure the gauge range for the functional range of the parameter
(refer to Figure 5-24).
General
Unless noted below, the gauge range must include all markings.
Configure the gauge range minimum and maximum based on the range of the tachometer being
Tachometer
replaced.
Manifold The minimum value must be the lower of the following: 10 inHg or 1 inch below the lowest range
Press marking. Use 1 inch above the highest marking as the maximum value.
Oil Press Use 0 psi as the range minimum. Use 5-10 psi above the highest marking as the range maximum.
Oil Temp Use 0°F as the range minimum. Use 10°F above the redline as the range maximum.
Fuel Use 0 as the range minimum. Use the same range maximum as the fuel indicator being replaced. It
(Main/Aux) is common for the fuel tank to hold more fuel than the system can measure.
Use 0 GPH as the range minimum. Use +10% of the highest marking or +10% of the highest takeoff
Fuel Flow
fuel flow at sea level as the range maximum.
Fuel Press Use 0.0 psi as the range minimum. Use +10% above the highest marking as the range maximum.
Use 25°F below the lowest marking as the range minimum. Use 25°F above the highest marking as
CHT
the range maximum. If no markings are present, use a range of 200°F-500°F.
Use 1000°F as the range minimum. Use 50°F above the redline as the range maximum. If no
Primary EGT
markings are present, use a range of 1000°F-1700°F.
Carb The range must be set to -24°C to 34°C.
190-02246-10
Rev. 11

Figure 5-24 Gauge Range Marking Example

b.
To capture the range between
5 PSI and 110 PSI, it may be
necessary to extend the range.
Guidelines
GI 275 Part 23 AML STC Installation Manual
Page 5-66