1. Adjusting the Alarm Unit Settings

Follow these steps to modify settings in the OVMS-50 alarm unit for the oxygen monitoring system:

1. Access the Alarm Settings

   • Press the "M" key on the alarm unit.
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2. Select the Channel

   • Choose Channel 1 and press the Enter key until the channel setting menu appears.
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3. Enter Password

   • Input the password: "0000" and confirm.

4. Modify High Scale Setting

   • Use the Arrow button to navigate.
   • Set the High Scale value to 25.0.
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5. Return to Operating Mode

   • Press the "Go Back" button to exit settings.

2. Configuring the Alarm Values

1. Modify Alarm Thresholds

   • Adjust the alarm values according to the required specifications.
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2. Save and Exit

   • Press the "Go Back" button to return to the operating mode.

3. Configure Channel 2 Settings

   • Select Channel 2 and press Enter until the channel setting menu appears.
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4. Adjust Required Settings

   • Modify parameters as needed.
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5. Finalize Settings

   • Confirm all changes and press "Go Back" multiple times to exit to the main menu.
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3. Verifying the Alarm System

1. Check the Oxygen High Alarm Functionality
2. Confirm the Non-Flow Alarm Settings
3. Inspect the Vapor Pressure Alarm Configuration

If the alarm still malfunctions, consider replacing the alarm unit with a new one.

4. Final Notes

• Ensure correct wiring and secure cable connections before adjusting the settings.
• If issues persist after adjusting the oxygen monitoring system, verify the sensor and signal input values.