Shipboard marine instrumentation monitors critical thermodynamic parameters across propulsion machinery, boilers, auxiliary generators, and cargo systems. Service includes calibration, loop testing, and certified sensor renewal for pressure transmitters, Pt100 RTDs, thermocouples, vacuum gauges, and differential pressure switches.
Seanav Marine provides 24/7 technical attendance from Dubai Maritime City across UAE ports (Dubai, Jebel Ali, Fujairah, Abu Dhabi, Sharjah) and coordinates global service teams across Singapore, Egypt, and India. Contact our automation desk with equipment make, model, and symptoms to confirm engineer attendance.
What should the service assessment check?
The following technical inspections establish a competent baseline service scope in accordance with equipment manuals and Class survey requirements:
- Pressure transmitter span, zero, and linearity verification using deadweight testers or digital calibrators.
- Pt100 3-wire/4-wire resistance-temperature characteristics and thermowell thermal contact.
- 4–20 mA loop power supply voltage, load resistance, and galvanic isolation barrier testing.
- Safety shut-off switches (low lube oil pressure, high cooling water temperature) trip point verification.
- Marine-type vibration-resistant terminal block integrity, screening ground continuity, and IP67 sealing.
What must be distinguished before testing?
Instrument calibration must be performed using traceable reference standards. Sensor drift must be checked against factory calibration tables before adjusting zero and span screws.
Frequently Asked Service Questions
What causes 4–20 mA loop current to clip or drop to 0 mA?
Loop clipping usually indicates a broken cable screen, earth loop fault, damaged transmitter output transistor, or open-circuit sensor element.
Why are 3-wire or 4-wire Pt100 RTD connections required on ships?
The additional wires cancel out cable lead resistance over long cable runs from the engine room double-bottom to the alarm monitoring console.
Related Automation & Control Systems
Browse related technical directories: Marine Automation Systems Hub · Alarm Monitoring Systems (AMS) · Boiler Automation Systems · Gas Sensor Calibration Kits.
Reference Framework
Regulatory compliance standards governing this shipboard equipment:
- IMO: SOLAS International Convention for Safety of Life at Sea
- IACS: Unified Requirement UR E22 (Computer Based Systems)
- IEC 60092: Electrical Installations in Ships
About this guide
Published by Seanav Marine Technical Editorial Desk. Last reviewed: . Equipment manuals, vessel drawings, and classification society requirements determine specific attendance procedures.
For urgent port attendance or technical enquiries, contact Seanav Marine · service@seanav.org · +971 58 568 1197.