190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 21-15
21.2.7 Turbine Engine Applications
Turbine Engines - Many turbine engines can be monitored using the supported engine sensors shown in
Table 21-1
, along with custom engine sensor configuration as described in Section 30.4.32 for GDU 4XX
displays. Turbine engines are not supported by the GDU 37X display.
Fuel Quantity
Most sensors that provide a resistance, voltage, or frequency output can be
used without modification. New fuel quantity calibration will be performed
during G3X system installation.
For capacitive fuel quantity measurement, a third-party capacitance-to-
frequency or capacitance-to-voltage converter is required; the G3X system
does not support direct connection to capacitive fuel tank probes.
Control Surface
Position
Most potentiometer-type sensors can be used without modification. New
position calibration will be performed during G3X system installation.
Table 21-11 Sensors for Turbine Engines
Sensor Type Details/Part Number
N1 / N2 RPM
Two separate turbine engine RPM gauges can be displayed. Select
"Custom" configuration for GEA 24 RPM1 / RPM2 inputs and enter
frequency-to-RPM calibration. A Sandia ST26 tachometer signal
converter is typically required to provide proper digital signal conditioning.
Torque
Use Garmin GPT 150G (011-05783-30) for pressures under 150 PSI and
enter pressure-to-torque calibration, or select "Custom" and enter
voltage-to-torque calibration
Oil pressure
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Oil temperature Use any supported sensor from Table 21-1
Turbine inlet or outlet
temperature
Use Type K thermocouple
Fuel pressure
Use supported Garmin or UMA pressure sensor, or select "Custom"
configuration and enter voltage-to-pressure calibration
Fuel flow
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter pulses-per-gallon calibration
Hydraulic pressure (or
other pressure)
Use any supported sensor from Table 21-1, or select "Custom"
configuration and enter voltage-to-pressure calibration
Other parameters Use any supported sensor from Table 21-1
Table 21-10 Retrofit Engine Sensors
Sensor Type Notes on Suitability for Reuse
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