INSIGHT G3 - User Manual

Configuring the G3 For Your Engine’s Fuel System
Overview:
The G3 is capable of interfacing with numerous fuel system configurations, and need only be told which arrangement your
engine is equipped with. The selection is made on the Engine Configuration screen, item #6 “Fuel”.
There are presently three possible selections: Injected, Carb, or PCarb.
Select Injected for engines equipped with fuel injection with a single supply line.
Select Carb for engines equipped with a carburetor with a single supply line.
Select PCarb for pressurized carburetors equipped with a supply line and a separate return line.
The first two items are the most common arrangements used on aircraft engines, and need little additional explanation.
The fuel transducer is installed along the fuel supply path to either the fuel distributor or the carburetor, and measures the
total amount of fuel supplied to the engine.
This transducer is connected to the FF1 input of the G3.
Engine fuel systems equipped with a return line require some additional hardware to configure. In this case a fuel transducer
is still used to measure the amount of fuel supplied to the carburetor, but a second fuel transducer must be used to measure
the amount of fuel returned to the fuel tanks by way of the return line. The amount of fuel measured by the return sensor
is then subtracted from the fuel measured by the supply sensor, with the result yielding the fuel consumed by the engine,
which is the quantity we wish to display on the G3. The supply sensor must be connected to FF1 of the G3 and the return
sensor to FF2.
Using the knobs to navigate the G3:
The G3 has two knobs: one at the top and one at the bottom.
There are two functions built into each knob: the push button switch activated by pressing the knob in, and the selection is
activated by turning the knob either clockwise or counter clockwise.
The top knob, labeled PG for page, is used to select the various pages or screens.
The bottom knob, labeled SEL for select, is used to make a selection on the current page.
There are two sets of screens or pages. The main screens are automatically used by default.
In order to enter the configuration screens turn off the avionics power to the G3, wait several seconds, then press and hold
the top button, and finally turn on the avionics without releasing the top
button.
This will take you to the Registration Config screen.
From this screen turn the top knob clockwise two clicks to get to the
Engine Configuration screen.
Once you are there you do not use the top knob any more because
turning it takes you away from the current screen.
The bottom button is pressed to select a line.
When you first enter a screen by default no line is selected.
Pressing the bottom button once selects line 1.
The selected line is shown in yellow.
Pressing it a second time selects line 2, etc.
On lines that allow you to select from multiple items the selected
item is shown in red.
Instrument Corp.
Page 1

Summary

G3 Engine Fuel System Configuration

Overview and Fuel System Options

Explains the G3's fuel system compatibility and lists Injected, Carb, and PCarb as options.

Navigating the G3 Interface

Details the functions of the top (PG) and bottom (SEL) knobs for screen navigation and selection.

Setting the Fuel System Type

Guides users on selecting the correct fuel system type (Injected, Carb, PCarb) on the Engine Configuration screen.

Overview

1. Function Description
2. Important Technical Specifications
3. Usage Features
4. Maintenance Features

The provided document describes the configuration of the G3 Graphic Engine Monitor, specifically focusing on its fuel system settings. The G3 is an advanced instrument designed to interface with various aircraft engine fuel system configurations, offering detailed monitoring capabilities.

Function Description

The primary function of the G3, as detailed in this document, is to monitor and display fuel consumption for aircraft engines. It achieves this by allowing users to select the appropriate fuel system configuration from three options: "Injected," "Carb," or "PCarb." This selection dictates how the G3 interprets fuel flow data.

• Injected: For engines equipped with a fuel injection system and a single fuel supply line. In this setup, a single fuel transducer measures the total fuel supplied to the engine.
• Carb: For engines equipped with a carburetor and a single fuel supply line. Similar to "Injected," a single fuel transducer measures the total fuel supplied.
• PCarb (Pressurized Carburetor): For engines with a pressurized carburetor that utilize both a fuel supply line and a separate fuel return line. This configuration requires two fuel transducers: one to measure fuel supplied to the carburetor (connected to FF1 input) and another to measure fuel returned to the tanks (connected to FF2 input). The G3 then calculates the actual fuel consumed by subtracting the returned fuel from the supplied fuel.

The G3's ability to adapt to these different fuel system types ensures accurate fuel consumption readings, which are crucial for flight planning and engine management.

Important Technical Specifications

While the document doesn't list explicit technical specifications like dimensions or power requirements, it highlights key functional specifications related to its fuel monitoring capabilities:

• Fuel Transducer Inputs: The G3 supports at least two fuel flow transducer inputs: FF1 (for supply fuel flow) and FF2 (for return fuel flow, specifically for PCarb configurations).
• Configuration Options: It offers three distinct fuel system configuration options: Injected, Carb, and PCarb, accommodating a wide range of aircraft engine types.
• Engine Configuration Screen: The "Engine Configuration" screen (item #6 "Fuel") is the central interface for setting the fuel system type. This screen also includes other parameters such as Engine Model, Engine Max HP, Engine Max RPM, Engine Cylinders, Engine Turbo, Flowtran type, and Maximum Fuel capacity, indicating a comprehensive engine monitoring suite.
• Data Storage: The G3 has a "SAVE CONFIG" option (item #9) to permanently store configuration changes, ensuring settings persist across power cycles.

Usage Features

The G3 is designed with a user-friendly interface, primarily controlled by two physical knobs:

• Top Knob (PG - Page):

  • Function: Used to navigate between different pages or screens of the G3.
  • Operation: Turning the knob clockwise or counter-clockwise cycles through available pages.
  • Push Button: Pressing the top knob is part of the procedure to enter configuration screens.

• Bottom Knob (SEL - Select):

  • Function: Used to make selections or adjust parameters on the currently displayed page.
  • Operation: Turning the knob clockwise or counter-clockwise changes the selected item or value on a line.
  • Push Button: Pressing the bottom knob selects a specific line on the screen. Repeated presses cycle through the available lines.

Navigation and Configuration Procedure:

1. Accessing Configuration Screens: To enter the configuration mode, the user must:
   • Turn off avionics power to the G3.
   • Wait several seconds.
   • Press and hold the top knob.
   • Turn on avionics power while continuing to hold the top knob. This will lead to the "Registration Config" screen.
2. Navigating to Engine Configuration: From the "Registration Config" screen, turn the top knob clockwise two clicks to reach the "Engine Configuration" screen.
3. Selecting Fuel System Type:
   • Once on the "Engine Configuration" screen, the top knob should not be used further, as it would navigate away.
   • Press the bottom knob repeatedly to select line #6, "FUEL." The selected line is highlighted in yellow.
   • Turn the bottom knob clockwise or counter-clockwise to choose between "INJECTED," "CARB," or "PCARB." The currently selected item is displayed in red.
4. Saving Configuration:
   • Press the bottom knob repeatedly to select line #9, "SAVE CONFIG."
   • Turn the bottom knob to select "YES."
   • Press the bottom button (knob) again to save the changes into permanent memory.

Visual Cues:

• Yellow Highlight: Indicates the currently selected line on the screen.
• Red Text: Indicates the currently selected item within a line (e.g., "PCARB" in red on the "FUEL" line).

Maintenance Features

The document does not explicitly detail maintenance features in terms of routine checks or servicing. However, the configuration process itself can be considered a form of initial setup or re-configuration maintenance. The ability to save configurations ensures that settings are retained, reducing the need for frequent re-entry of parameters. The clear, step-by-step instructions for accessing and modifying settings contribute to ease of maintenance for the system's software configuration. The mention of "SD DATA CARD" on the screen implies potential for data logging or software updates, which are common maintenance-related features in modern avionics, though not elaborated upon in this text.

INSIGHT G3 Specifications