Brannstrom CleanTrack 900 ODME Computer Unit

Brannstrom CleanTrack 900 Oil Discharge Monitor Computer Unit

The Brannstrom CleanTrack 900 Computer Unit is the central processing, data logging, and operator interface module for the CleanTrack 900 Oil Discharge Monitoring Equipment (ODME) system. Installed inside the vessel’s Cargo Control Room (CCR) or an equivalent gas-safe non-hazardous space, this unit continuously calculates instantaneous oil discharge rates in liters per nautical mile and total cumulative oil discharged in liters.

By processing real-time infrared (IR) scattering and transmission data alongside vessel speed log pulses and overboard flow rates, the computer unit regulates the pneumatic or electro-pneumatic overboard discharge valve (OBV) and slop tank recirculation valve (STV). When oil content exceeds statutory limits or a system fault occurs, the unit immediately de-energizes the control loop to close the overboard valve and divert effluent back to the slop tank.

Model Details

• Primary System Model: CleanTrack 900 (Computer Unit Assembly)
• Manufacturer: Brännström Elektronik AB / Brännström Sweden AB (Göteborg, Sweden)
• Primary MPN: CLEANTRACK 900
• Internal PCB & Sub-Assembly Part Numbers:
  • CTMJC-20-2: CleanTrack 900 Computer PCB (8-Wire Version)
  • CT900831.6: CleanTrack 900 Power Supply PCB (8-Wire Version)
  • CT-BE165: CleanTrack 900 / 1000 Interface PCB
  • CT991215.9mstpnl: CleanTrack Master Panel / Display PCB

Compatibility

• Brannstrom CleanTrack 900 Converting Unit (Engine room / safe-zone interface cabinet housing Zener barriers and solenoid relays)
• Brannstrom CleanTrack 900 Analysing Unit (Pump room hazardous-zone optical cabinet)
• Brannstrom Measuring Cell Assembly (CT891120.4d1) (Shared optical quartz-tube sensor cell compatible across CleanTrack 900 and CleanTrack 1000)
• Brannstrom CleanTrack Analysing Valve (CT891120.4d2)
• Brannstrom Sample Feed Pump Units (SPP-100 with Elprom Ex-proof motor or Speck pump with Gast pneumatic air motor)

Features

1. Real-Time MARPOL Compliance Engine: Continuously computes instantaneous oil discharge rate and total oil discharged from live ppm, flow rate, and vessel speed inputs.
2. 4-Channel Optical Scattering Diagnostics: Evaluates both direct light transmission (Me1) and multi-angle scattered light (Me2–Me4) on Page 5 (PAGE IR-DETECTOR) to differentiate oil droplets from air bubbles or entrained solids.
3. Failsafe Overboard Valve Interlock: Automatically triggers a shutoff signal to close the overboard discharge valve and open the slop tank recirculation line upon exceeding 30 L/nm, 15 ppm, or losing power/sensor feedback.
4. Tamper-Evident Non-Volatile Logging: Stores historical discharge logs, alarm events, and valve status transitions in flash memory with integrated hard-copy printout capability for Port State Control (PSC) inspections.
5. 2-Wire Shielded Field Bus Architecture: Simplifies cargo control room installation with a single twisted-pair shielded communication link to the engine room Converting Unit over runs up to 120 meters.

Applications

• Crude Oil Tankers (VLCC, Suezmax, Aframax)
• Product & Chemical Tankers discharging cargo tank washings and dirty ballast
• Floating Production Storage and Offloading (FPSO) and FSO units
• Legacy vessel retrofit and spare-part replacement for ships operating under IMO A.586(14) and MEPC.108(49) regimes

Frequently Asked Questions

What power supply is required for the Brannstrom CleanTrack 900 Computer Unit?

The Computer Unit operates on a single-phase 110 VAC or 220 VAC at 50/60 Hz with a maximum power rating of 50 VA. It must be wired through a dedicated main disconnect switch protected by a fuse rated at 6 A maximum.

Where should the CleanTrack 900 Computer Unit be installed on a tanker?

The Computer Unit is non-intrinsically safe and must be bulkhead-mounted inside a gas-safe area, such as the Cargo Control Room (CCR) or engine control room. It communicates with the hazardous-zone Converting Unit via a 2-wire 0.5 mm² twisted-pair shielded cable up to 120 meters in length.

Can I use a CleanTrack 1000 Measuring Cell with the CleanTrack 900 Computer Unit?

Yes. The optical Measuring Cell (MPN: CT891120.4d1) and the Signal Interface PCB (MPN: CT-BE165) are cross-compatible between the CleanTrack 900 and CleanTrack 1000 systems. After installing a replacement measuring cell, you must enter the new factory calibration values (C01–C04, CR1–CR4, and Re1–Re4) into Page 5 (PAGE IR-DETECTOR) of the Computer Unit menu.

What speed log signal does the CleanTrack 900 accept?

It requires a voltage-free dry contact or relay pulse input calibrated between 45 and 999 pulses per nautical mile (pulses/nm). The signal must have a minimum switch on/off time of 33 ms and a maximum contact bounce/rebound time of 8 ms.

Is the Brannstrom CleanTrack 900 approved for bio-fuel blends?

No. The CleanTrack 900 is type-approved under IMO Resolution A.586(14) and MEPC.108(49) for crude oil, black and white petroleum products, and standard oil-like substances. Vessels carrying bio-fuel blends regulated under MEPC.240(65) require upgrading to the Brannstrom CleanTrack 1000B ODME system.