UniVario FMX5000 IR
Minimax UniVario FMX5000 IR — Flame Detection - Infrared (Industrial).
Inspector Detail
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Common issues
- False alarms from hot machinery surfaces, welding flashes, or reflected sunlight triggering the IR sensor
- Missed detection from optical window fouling by oil film, dust, or salt deposits
- Sensor drift or ageing reducing sensitivity over time
- Cable and connector corrosion in the engine room environment
- Loop/power supply fault causing the detector to drop offline
Inspection checklist
- Clean the optical window and check for scratches or fogging
- Function-test with the maker's approved test lamp/IR test source
- Verify the alarm signal reaches the fire panel and any linked shutdown (ventilation, fuel quick-closing valves)
- Check the detector's zone/address on the fire panel matches the as-built fire control plan
- Inspect cable glands and wiring for corrosion or damage
- Confirm the detector's field of view is not obstructed by newly installed equipment or piping
- Check supply voltage at the detector terminals against the maker's specification
Service intervals
| Functional test | typically every 3-6 months per the SOLAS/flag fire detection testing regime, or per the maker's recommendation |
| Optical window cleaning | every 1-3 months in dirty/oily engine room environments, condition-based |
| Full sensitivity check/service | per the maker's schedule, commonly annually or per class requirement |
Critical spares
- Replacement detector unit of the same type/approval
- Mounting bracket/gasket kit
- Cable glands and terminal block
- Test lamp/IR test source consumables for the maker's functional test procedure
Safety
- Crew must understand the false-alarm handling procedure to avoid unnecessary automatic shutdowns during testing
- Follow the detector isolation procedure during nearby hot work, then confirm reinstatement afterward
- Do not disable detection without a compensating fire watch per the ship's SMS procedure
Class survey
Fire detection and alarm systems are checked at survey for correct zone coverage, alarm transmission to the bridge/fire panel, and functional test records; surveyors typically want to see a log of periodic detector testing under the approved maintenance plan.
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Visual inspection of detector lens and internal optical elements for dust, insect debris, corrosion, or condensation; perform monthly visual check and semi-annual smoke-entry functional test per NFPA 72
Sensitivity testing of detector elements within 1 year after installation and every 2 years thereafter; for aspirating systems, verify suction pressure (>400 Pa) and air sample integrity
Visual inspection for cracks, corrosion, impact damage; verify mounting security and alignment; check for loose connectors or cable damage; test mechanical self-testing indicators (for YMX5000 cyclic optics monitoring)
Functional test of detector signal transmission to control panel; verify alarm and fault relay operations; test communication loop continuity; check battery status (for battery-powered units like Ei series), expected 10-year life
Document installation date; replace heat detectors (WMX series) after 15 years maximum service life; replace aspirating smoke detectors (AMX series) per manufacturer recommendations typically 20-25 years; check for obsolescence of electronic components
Type-general inspection and maintenance points for this equipment category — not model-specific.
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