Back to services
AMS · Extension alarm · Dead-man
Engine Room Alarm / Monitoring
AMS panels (Praxis, Kongsberg, NORIS), engineer's dead-man, extension alarm, sensor calibration on PT100 / 4–20 mA loops.
Service available at all US ports — 24/7 worldwide. Our next available technician contacts you within 1 hour.
Symptom checklist
What we hear from the bridge.
- ›Alarm flood >10 alarms per 10 min (EEMUA 191 breach)
- ›Praxis Megachief HMI black screen after hours
- ›PT100 transmitter reads 0% on full tank
- ›Extension alarm to cabin not triggering
- ›Dead-man bell test fails on bridge
Likely root causes
Where the fault usually lives.
- ›HMI graphics card thermal failure
- ›PT100 transmitter calibration drift beyond ±0.5%
- ›Modbus RS485 termination missing, CRC errors
- ›Wet JB on extension alarm wiring
Equipment we bring
Calibrated test equipment, class-acceptable reports.
- Emerson 475 HART field communicator
- Druck DPI 620 calibrator
- Wireshark with Modbus dissectors
- B&B RS485 bus analyser
Reports compatible with DNV · BV · ABS · Lloyd's · TL · RINA · ClassNK · IRS.
Often needed together
Parts most often requested with this service.
- ams cards
- pt100 tx
- alarm bells
FAQ
Common questions for this system.
- Which AMS / IAS platforms do we service?
- Praxis Megachief, Praxis Selma, Kongsberg K-Chief 600/700, NORIS FlexView, Lyngsø Marine, ABB AC-700. We carry the relevant service tools and a baseline spares pack on every dispatch.
- Can we attend at-sea remotely for alarm investigation?
- If the vessel has a service VPN, yes — we read the alarm log, snapshot the HMI graphics and trace the I/O channel without boarding. Physical replacement still needs an ETO at the next port call.
- How long does a typical alarm investigation take?
- Three to five hours alongside for a standard alarm-flood investigation — log analysis, sensor calibration check, transmitter calibration, alarm rationalisation per EEMUA 191. Re-programming the IAS takes longer and is scheduled separately.
Have a vessel calling?
Three quick questions — port, when, contact. Our next available technician will contact you within 1 hour.