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Replacing Flow Sensor

Course Content
Display Screen
Navigating the TFT Display and Power Controls This module covers the basic operation of the eAdvantage system's TFT display. You’ll learn how to: Power on the unit using the control knob Understand the automatic calibration process that occurs at startup Identify key information displayed on the main operation screen, including gas concentration levels, timer, battery status, settings access, and lock/unlock indicators Properly power down the unit by holding the control knob for four seconds By the end of this module, you’ll be familiar with the essential functions and interface of the TFT display.
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Display Screen
00:51
Navigating the TFT Display and Power Controls
00:05:00
External Components
In this introductory module, you will become familiar with the external components and user interface of the eAdvantage system. Key elements covered include: Controls and Indicators: TFT screen, control knob, power on/off button, oxygen flush button, mute and cancel buttons LED Indicators: Battery status, power supply, and charging indicators Ports and Connectors: Nitrous oxide input, oxygen input, DC input, USB port, gas output connector, airway pressure sensor/hose connector Other Components: Buzzer and battery compartment By the end of this module, you’ll be able to confidently identify and describe all major external features of the system.
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External Components
00:00
External Components and Interface
00:05:00
Replacing the Main Board
This module provides a step-by-step guide on safely opening the eAdvantage device to replace the main board. Key steps include: Preparation: Power off the unit, disconnect the battery, and remove it from the compartment Disassembly: Turn the unit upside down, protect the control knob, and level the device before unscrewing the bottom panel Screw Identification: Remove five long screws and two short screws located near the side handle Panel Removal: Flip the unit upright, carefully lift the front panel, and disconnect the flat cable and oxygen input By the end of this module, you’ll understand how to safely access the internal components and begin a main board replacement.
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Replacing the Main Board
Replacing the Main Board of the eAdvantage Device
00:05:00
Internal Components
In this module, you will explore and identify the key internal components of the eAdvantage system. The video highlights the layout and connections of critical parts, including: Gas Path Components: Oxygen and nitrous oxide input manifolds Oxygen and nitrous oxide proportional valves Oxygen and nitrous oxide flow sensors Output manifold Connectors and Interfaces: DC input connector USB connector Buzzer connector Tubing Connections: Input and output tubes for both oxygen and nitrous oxide flow sensors By the end of this module, you’ll have a clear understanding of the internal gas flow architecture and connectivity within the device.
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Internal Components
00:00
eAdvantage System Components
00:05:00
Replacing the Proportional Valve
In this section, we’ll go over how to replace the proportional valves. First, locate the two screws beside the valve. Loosen them carefully. Once the screws are loosened, rotate the valve 45 degrees. Now, with a firm grip, pull the valve straight out to remove it. Make sure to follow these steps in order to ensure safe and proper removal.
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Replacing the Proportional Valve
Proportional Valve Replacement
00:05:00
Replacing Flow Sensor
In this section, we’ll walk through how to replace the flow sensor. To begin, the manifold must be disassembled. Use an 11/16-inch torque wrench with a Hexit socket, set to 70 inch-pounds. Loosen the output adapter by rotating the tool to the left. Next, use the modified 11/16-inch wrench to loosen the oxygen and nitrous input connectors. While loosening, be sure to hold the internal part in place to prevent it from rotating. Now, carefully remove the entire manifold assembly from the unit. Pull out the metal tubes, and extract the flow sensor. To reinstall, simply reverse the steps we just covered.
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Replacing Flow Sensor
Flow Sensor Replacement
00:05:00
Replacing TFT Driver PCB
Removing and Replacing the TFT Driver PCB Summary for Training Module: This instructional video guides service technicians through the correct procedure for removing and reinstalling the TFT driver PCB (Printed Circuit Board), a critical component responsible for controlling the device’s display. Procedure Overview: Cable Disconnection: Begin by disconnecting all three cables attached to the PCB. For the large flat cable, unlock the connector by pressing the latch toward the connector—then gently pull the cable free to avoid damage. Board Removal: Unscrew the four screws securing the PCB to the housing. Once the screws are removed, carefully lift the PCB out, avoiding contact with sensitive components. Reinstallation: To reinstall the PCB, reverse the removal steps: Position the PCB. Secure it with four screws. Reconnect all cables, ensuring secure and proper alignment, especially for the flat cable. Key Learning Objectives: Safely disconnect and handle flat and multi-pin cables. Follow proper electrostatic discharge (ESD) precautions during PCB handling. Reassemble display electronics with correct mechanical and electrical integrity.
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Replacing TFT Driver PCB
00:00
TFT Driver PCB Replacement
00:05:00
Replacing Key Membrane
To begin, remove the key membrane and clean the area thoroughly. Make sure the TFT cover is also clean and free of any debris. Next, peel off the paper backing from the sticker underneath the key membrane. Pass the flat cables through the slot located beside the TFT screen area. Now, align the key membrane exactly as shown in the video. Once aligned, press down firmly on the corners to ensure it’s securely adhered to the case.
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Replacing Key Membrane
Key Membrane Replacement
00:05:00
Replacing Encoder PCB
This module provides detailed instructions for replacing the encoder PCB in the eAdvantage system. The procedure includes: Disassembly: Remove the front panel, then detach the control knob and unscrew the securing nut Component Removal: Carefully extract the encoder along with the attached PCB Replacement and Reassembly: Ensure the O-ring is properly positioned on the end of the new encoder Insert the encoder, paying attention to the board orientation and cable direction Hold the unit in place while securing it with the nut and washer Tighten all components securely to complete the installation By the end of this module, you will be able to confidently replace the encoder PCB with proper alignment and sealing.
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Replacing Encoder PCB
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Encoder PCB Replacement
00:05:00
Settings
Navigating and Configuring Device Settings This instructional video provides a detailed walkthrough of the Settings Menu on the device interface, guiding service technicians through various essential functions used for configuration, maintenance, and data management. Main Functions Covered: Accessing Settings Mode: Rotate the control knob to the bottom-left corner to highlight the Settings icon. Press the knob to enter the menu. Settings Menu Overview: The following options are accessible: Date and Time Adjustment Passcode Change Software Update Data Display Data Transfer Date and Time Adjustment: Select Date and Time using the knob. Enter the default password (00) when prompted. Modify the date/time or press Cancel to exit. Passcode Change: Select Passcode from the menu. Enter the current password. Input a new password or select Cancel to abort. Software Update: Choose Software Update. Enter the password and insert a USB stick. Press the knob to begin the update. Data Display: Navigate to Data Display to review logged events. Scroll through entries using the knob. Press Cancel to return to the main menu. Data Transfer (incomplete in transcript): The menu includes functionality for exporting logged data via USB or other methods (assumed), to be detailed further during live demonstration or documentation. Key Learning Objectives: Gain familiarity with the device's configuration interface. Learn secure and correct navigation through menu options using the control knob. Understand essential maintenance tasks such as timekeeping accuracy, firmware updates, and data management.
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Settings
Device Settings Navigation & Configuration
00:05:00
Testing HIGH Input Pressure Alarm
In this module, you’ll learn how to verify the eAdvantage system’s high input pressure alarm. The procedure includes: Test Setup: Gradually increase the input gas pressure to 80 PSI Alarm Activation: Once the pressure reaches 80 PSI, the system will trigger a high input pressure alarm Alarm Indicators: The alarm is confirmed by a visual indicator on the screen and an accompanying audible alert By the end of this module, you’ll be able to perform a high-pressure alarm check to ensure proper system safety response.
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Testing HIGH Input Pressure Alarm
High Input Pressure Alarm
00:05:00
Testing LOW Input Pressure Alarm
This video segment demonstrates how to verify the functionality of the input pressure alarm system, which ensures the device responds appropriately to insufficient or lost input pressure conditions—critical for maintaining patient safety and system reliability. Procedure Overview: Setup for Alarm Testing: Use a flow control valve to simulate a small leak in the input line. Gradually decrease the pressure using the pressure regulator to simulate real-world failure conditions. Low Input Pressure Alarm: As the pressure drops below 40 psi, the device will trigger the Low Input Pressure Alarm, indicated by: A visual warning on the display. An audible alarm sound. No Pressure Alarm: Continue reducing pressure to approximately 20 psi. The device will now trigger the No Pressure Alarm, characterized by: A no pressure alarm indicator. A continuous cycling audible alarm, signaling critical loss of input pressure. Key Learning Objectives: Perform controlled testing of pressure-related alarm systems. Recognize specific alarm thresholds and their corresponding indicators. Understand the significance of these alarms in preventing operational failure.
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Testing LOW Input Pressure Alarm
Input Pressure Alarm Verification
00:05:00
Operational Testing
This video provides a step-by-step demonstration of how to test and verify the performance of a gas delivery system, specifically focusing on oxygen and nitrous oxide concentration, baseline pressure, leak integrity, and flush flow functionality. Accurate testing of these parameters is essential to ensure device safety and clinical performance. Procedure Overview: Setup and Configuration: Connect the E-Advantage device to the appropriate gas sources: Oxygen and Nitrous Oxide. Adjust inlet pressures to the specified range: Target: 60 PSI for both gases. Power on the regulators and activate the device. Use the default 50/50 oxygen-nitrous oxide mix setting for testing. Patient Simulation Setup: It is recommended to use a dual test lung setup: One lung is operated by a ventilator. The second lung is driven by the first, simulating patient-demand breathing. Alternative: Use a 1-liter syringe or similar device capable of mimicking breathing with: A minimum tidal volume of 900 mL. A consistent rate and volume for accurate measurements. Testing Requirements: The tidal volume must consistently reach at least 900 mL. Each syringe pull or simulated breath should be capable of achieving this volume. The duration of each cycle must ensure the device registers and responds to gas demand correctly. Key Learning Objectives: Properly connect and configure medical gas supplies for testing. Simulate patient-demand ventilation using test lungs or volume-controlled alternatives. Validate gas delivery accuracy, leak tightness, and flow functionality under realistic conditions.
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Operational Testing
Gas Delivery System Testing
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eAdvantage® Service Training Center
About Lesson

In this section, we’ll walk through how to replace the flow sensor.

To begin, the manifold must be disassembled.
Use an 11/16-inch torque wrench with a Hexit socket, set to 70 inch-pounds.

Loosen the output adapter by rotating the tool to the left.
Next, use the modified 11/16-inch wrench to loosen the oxygen and nitrous input connectors.
While loosening, be sure to hold the internal part in place to prevent it from rotating.

Now, carefully remove the entire manifold assembly from the unit.
Pull out the metal tubes, and extract the flow sensor.

To reinstall, simply reverse the steps we just covered.

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