Bulk Carrier Ballast Tank Level Remote Monitoring Calibration & Inspection | Qingdao Beihai Shipyard Prevent Hull Deformation, Structural Stress Damage & Serious Marine Voyage Risks
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Bulk carrier ballast tank level remote monitoring system calibration & inspection in Qingdao Beihai shipyard
During the Labor Day holiday, our engineering team finished professional calibration, inspection and fault repair for ballast tank level remote monitoring system of bulk carrier at Qingdao Beihai Shipyard.
Accurate ballast level data directly determines hull stress balance, ship trimming safety and whole voyage navigation stability. Unreliable level monitoring will easily cause hull deformation, excessive structural stress, serious voyage risks and even critical marine accidents.
Once the system shows wrong, drifting or delayed data, it will bring huge hidden dangers to ship sailing, cargo safety, crew safety and marine environment, and may result in port inspection detention & heavy economic losses.
Entrusted by shipowner, we rely on years of marine electrical service experience to thoroughly eliminate all hidden faults, keep remote monitoring system stable and accurate for long-distance ocean navigation.
Detailed on-site troubleshooting cases are as follows:
1. WBT NO.3 P & NO.2 S
Fault Description: No ballast level display, data remains zero permanently
Fault Phenomenon: Control panel level data does not refresh, no data feedback of relevant tanks
Fault Troubleshooting & Treatment
1. Check 24V power supply and signal conversion module voltage, power and module output are normal.
2. Measure signal loop voltage with multimeter, confirm circuit integrity without disconnection.
3. WBT NO.2 S: Loose and oxidized cabinet terminals cause poor contact; tighten terminals and conduct anti-oxidation treatment.
4. WBT NO.3 P: Clogged level sensor probe; clean and calibrate to restore normal level signal.
Result : Fault resolved, liquid level display returns to normal.
2. WBT NO.1 P&S
Fault Description: Unstable floating liquid level data with frequent drift
Fault Phenomenon: Irregular data jumping, greatly inconsistent with actual tank level.
Treatment Plan
1. Check cable insulation and shield grounding to eliminate signal interference.
2. Test module voltage stability; replace aging faulty module with abnormal voltage output.
3. Recalibrate sensor zero point and full range on site.
4. Remove impurities and bubbles inside tank to ensure accurate probe detection.
Result : Fault eliminated, liquid level remains stable without jumping or drift.
3. WBT NO.4 P & WBT NO.3 S
Fault Description: Individual tanks offline, communication lost and no liquid level data.
Fault Phenomenon: Grey offline status displayed on panel, communication interrupted completely.
Treatment Plan
1. Slight water ingress in explosion-proof junction box on site, reinforce waterproof sealing to avoid short circuit.
2. Check bus communication circuit, confirm the whole line is intact without disconnection.
3. Substation IO module has no indicator light and no working signal, replace damaged IO acquisition board.
4. Inspect PLC communication points, no program errors or communication failures.
Result : Fault resolved, all tanks back online, communication signal stable.
4. WBT NO.4S & WBT NO.2P
Fault Description: Frequent false alarms while actual liquid level keeps normal.
Fault Phenomenon: Continuous high-low level alarm and flickering alarm light in engine room.
Treatment Plan
1. Reset high & low liquid level alarm limit parameters to correct numerical deviation.
2. Carry out overall on-site signal calibration to eliminate level detection errors.
3. Check alarm relay contacts and control circuit logic to avoid abnormal misoperation.
Result : False alarms are completely eliminated, system alarms accurately according to real liquid level changes.
Write at the last :
We never feel exhausted despite serving numerous vessels over the years, nor do we become complacent after solving countless marine equipment faults.
We stay true to our original mission all the time:
We spare no efforts to eliminate existing and potential faults of ship machinery, and maximize the safety of ocean voyages.
Ship voyage maintenance and maritime transportation are mutually beneficial industries that achieve common development together.
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