SAAB TankRadar G3 LCM Processor Memory Board 9150064-511

SAAB TankRadar G3 LCM Processor Memory Board PCB 9150064-511

The SAAB TankRadar G3 LCM (Level Calculation Module) Processor Memory Board (Part Number: 9150064-511) serves as the central computing and execution engine within the SAAB TankRadar G3 Calculation Unit. Engineered specifically for rigorous maritime service on crude oil carriers, chemical tankers, product tankers, and gas carriers (LPG/LNG), the LCM PCB processes raw digitized intermediate frequency (IF) data acquired from deck-mounted radar level gauges.

Working in tight conjunction with the LCS Signal Board (9150064-501), the LCI Interface Board (9150064-531), and the LCP Power Supply (9150065-541), the LCM card executes complex algorithms for FFT (Fast Fourier Transform) signal processing. It handles tank geometric compensation, volume determination, temperature averaging, and inert gas (IG) pressure computation in real-time.

Technical Specifications

Model Details

• Primary Part Number (MPN): 9150064-511
• Module Identifier: LCM (Level Calculation Module / Processor Memory Board)
• Revision Iterations: 9150064-511 Rev. C, 9150064-511 Rev. D, 9150064-511 Rev. E, 9150064-511 Rev. H, 9150064-511 Rev. J
• Sub-Assembly / Associated Modules:
  • 9150064-501: LCS Signal Board (Analog-to-Digital radar converter card)
  • 9150064-531: LCI Interface Board (Serial comms and workstation protocol multiplexer)
  • 9150065-541: LCP Power Supply Block (DC-DC Converter Board)
  • 9150064-621 / 9150064-601: Complete Calculation Unit Sub-Rack Enclosure
  • 9150064-871 / 9150068-871SP: Deck Transmitter Electronic Unit (Radar Gauge head electronics)

Compatible Equipment Models

• Central Level Units:
  • SAAB TankRadar G3 Master Level Unit (supports up to 30 radar channels).
  • SAAB TankRadar G3 Slave Level Unit (used for vessel configurations requiring 31 to 60 cargo/slop tanks).
• Deck Radar Level Gauges:
  • Parabolic Antenna Gauges (for crude, dirty products, and deep cargo holds).
  • Cone Antenna Gauges (DN200 flange deck installations for chemical/product carriers).
  • LPG/LNG Still-pipe / Waveguide Radar Gauges.
• Deck Electronics:
  • Saab G3 Electronic Transmitter Box series (P/N: 9150064-871, 9150064-871H, 9150068-871SP).
• Workstations & Software:
  • Saab Marine TankMaster PC workstation software.
  • Saab MPB Cargo Control Consoles and Integrated Automation Systems (IAS) interfacing via Modbus RTU/TCP.

Features

• Integrated Multi-Variable Processing: Natively calculates continuous cargo levels, multi-spot temperature averages, and inert gas (IG) vapor pressure without external calculation hardware.
• Ruggedized Maritime Construction: Built on a multi-layer FR4 substrate coated with an anti-fungal, moisture-resistant conformal barrier designed to withstand high-vibration engine room/CCR marine environments.
• Hardware Watchdog Integration: Features onboard fail-safe supervision circuitry that immediately triggers alarm outputs in the event of hardware hanging or memory failure, preventing stale cargo data.
• Hot-Swap Compatible Subrack Architecture: Designed for rapid slide-in installation via high-reliability DIN 41612 euro-connectors, minimizing downtime during cargo operations.

Applications

• Crude Oil Tankers (VLCC, Suezmax, Aframax): Primary cargo tank ullage gauging, vapor pressure control, and high-level / overfill protection integration.
• Product & Chemical Carriers: Accurate custody transfer measurement of corrosive, volatile, and high-viscosity liquid parcels across multi-segregated tanks.
• Gas Carriers (LPG / LNG): Closed-system cargo level measurement under pressurized, refrigerated, and cryogenic operating conditions.
• Floating Production & Offloading (FPSO / FSO): Real-time monitoring of crude storage tanks, slop tanks, and ballast compartments requiring continuous classification compliance.

Frequently Asked Questions

What is the primary operational role of the SAAB 9150064-511 PCB?

The 9150064-511 LCM Processor Memory Board acts as the central processor for the SAAB TankRadar G3 Calculation Unit. It receives digitized signals from the LCS Signal Board, applies calibration curves and tank shape matrices, and calculates accurate cargo ullage, volume, temperature, and IG pressure for display on CCR workstations.

Can I replace a 9150064-511 Rev. C or D with a Rev. H or J board?

Yes. The 9150064-511 board revisions are backward compatible within the TankRadar G3 Calculation Unit frame. However, ensure that the firmware version stored in the onboard EPROMs matches the system software requirements of your vessel’s existing Level Unit and TankMaster version.

What are common failure symptoms pointing to a defective LCM card?

Common indicators include: communication loss alarms on all tank gauges simultaneously, frozen level/temperature readings in the Cargo Control Room, the Level Unit system failure relay tripping continuously, or the onboard CPU LED remaining frozen solid red/unlit instead of blinking regularly.

Does replacing the 9150064-511 require recalibration of radar deck heads?

No. The radar deck heads (Transmitter Electronic Boxes) do not lose their factory RF zero-calibration when the LCM is swapped. However, the tank configuration parameters (ullage references, hold heights, sensor offsets) must be reloaded into the new LCM board’s memory from the vessel’s system backup files or TankMaster software to ensure accurate reading displays.

How do I verify that power is reaching the 9150064-511 correctly?

Check that the green power status LED on the front edge of the PCB is lit. Using an insulated multimeter probe, test across the marked ground and +5 VDC test pads on the front panel of the card cage. The reading should be stable between +4.95 VDC and +5.15 VDC. If voltage drops below +4.75 VDC, inspect the 9150065-541 LCP Power Supply board.