How to Maintain the BilgMon 488

A Practical Maintenance Guide for Long-Term Performance

Proper maintenance of the BilgMon 488 15 ppm bilge alarm from Brannstrom ensures reliable operation, environmental compliance, and maximum service life. This guide outlines the essential maintenance procedures, including calibration verification, sensor cleaning, and use of the autoflush function.

For related instructions, see also:

Martin Søvind Jensen

Product Manager

Tel: +45 2761 4502

Email: Martin.Sovind@insatech.com

Write to Martin

1. Verify Calibration Certificate and Service Interval

The BilgMon 488 sensor is factory-calibrated and supplied with a 5-year calibration certificate. As part of your routine maintenance schedule:

Always check the expiry date of the factory-issued calibration certificate.
Follow your internal procedures for periodic calibration checks (see Calibrating Your BilgMon 488).
Ensure the measuring cell is replaced or recalibrated when required to maintain compliance with IMO MEPC regulations (LINK: Artikel om regulativer)

This check is crucial to ensure accurate monitoring and correct logging of bilge water discharges.

Want to read more about the calibration of the Bilgmon 488 sensor? (LINK: til artikel om kalibrering af sensor)

2. Use the Autoflush Function

The BilgMon 488 can be configured with an autoflush feature, helping keep the measuring tube clean and reducing manual cleaning frequency.

How Autoflush Works

Autoflush periodically flushes the sensor tube with clean water.
The flushing interval is set in the settings menu.
Autoflush runs only when the device is in the main menu and is not actively monitoring or analysing bilge water.

Regular use of autoflush supports stable measurement conditions and prevents buildup inside the measuring tube.

Brannstrom BilgMon 488 installed on a ship

3. Cleaning the Measuring Unit

Even with autoflush enabled, occasional manual cleaning is recommended - especially in harsh operating environments or when deposits are visible.

Step-by-Step Cleaning Instructions

1. Prepare tools:

Soft bottle brush
Mild detergent
Clean water
Appropriate PPE (gloves, goggles, ventilation)

2. Clean the sensor unit:

Gently clean the inside of the tube using a soft brush and mild detergent.
Do not use metal tools or abrasive cleaning agents. These can damage or scratch the glass tube inside the SENSOR unit.

3. Removing rust or heavy deposits:

If rust or similar contamination has accumulated on the glass tube, use a diluted hydrochloric acid solution.
Ensure strict safety precautions: protect your eyes, skin, and airways, and rinse thoroughly with clean water afterwards.

Proper cleaning maintains accurate measurements and extends the life of the measuring cell.

4. General Best Practices for BilgMon 488 Maintenance

Document calibration expiry dates and cleaning intervals in your onboard maintenance system.
Activate autoflush whenever possible to reduce manual cleaning needs.
Inspect the sensor tube during normal service routines.
Replace the measuring cell or battery when recommended (see BilgMon 488 Battery Replacement).
Follow all IMO and class society guidelines for bilge monitoring equipment.

5. Summary

Maintaining the BilgMon 488 is straightforward and essential for ensuring accurate 15 ppm monitoring. By regularly verifying the calibration status, using the autoflush function, and cleaning the sensor correctly, you safeguard both operational performance and environmental compliance.

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