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FIBER OPTIC GYRO COMPASS - SP2000

The SP 2000 Fiber Optic Gyrocompass is a system integration of the LITEF LFK 95 Fiber Optic reference unit. optimized for survey applications. While maintaining the reliability and ruggedness inherent in the LITEF unit, the SP 2000 adds a user friendly interface and display. System inputs and outputs conform to industry standards for Heading - Pitch - Roll and Turn Rate.

 The Display and control unit utilizes three microprocessors to display the information and perform the necessary communications tasks. This allows the system to send data to the FOG at 4Hz and output data at 16 Hz. The system can be powered from either 220/110V AC or 24V DC. To facilitate the input of accurate latitude and speed information the SP2000 has a GPS input port with a 12V DC output to power integrated GPS/antenna units.

Options for the SP 2000 include

• Gyro Comparitor Display
• LITEF LFK95 Simulator
• Long Cable / ROV Multiplexor adapters

Key Benefits

LFK95 Specification

Heading :        0.7 ⁰ * sec Lat RMS accuracy to +/- 75 ⁰  Lat with +/- 20 ⁰  roll/pitch

Settling time : 30 – 45 minutes

Rate of turn :   - +/- 90 ⁰ /sec Roll / Pitch +/- 45 ⁰  ( 0.5 ⁰  )

MTBF :            > 20,000 Hrs Max Acceleration ( all Axis ) 10 m/sec^2

Max Velocity : 75 Knts Max Constant pitch/roll - +/- 15 ⁰

Initial Latitude input error : 0.3 ⁰  Speed input error - 1 Knt

SP 2000 CDU Specifications

Display - Multi – Line Vacuum Fluorescent ( 256 x 64 )

Page 1 - Heading – Tape display

Page 2 - Heading – Numeric with rate of turn analogue indicator

Page 3 - Digital Data – Heading, Pitch, Roll, Rate of turn

Page 4 - Raw Data / Diagnostic screen

Page 5 – Config. menu leading to individual setup screens for operational & port settings

Inputs

Position and Velocity Port 1 4800 / 9600 baud. RS 232 / RS 422

Automatic recognition of data from GGA GLL VTG and RMC NMEA sentences

This port also has a 24 V output for powering a stand alone GPS antenna/receiver.

Outputs

Port 1 - For digital repeater devices – NMEA 4800 fixed

HDT – heading, ROT – rate of turn, XDR – pitch and roll

Ports 2 and 3 - Configurable ports 4800, 9600 baud – RS 232 / RS 422

- NMEA – HDT, ROT, XDR

- SG Brown ASCII format 9600 baud

- Robertson digital format 9600 baud

Port 4 - Low voltage stepper drive – 1/6 degree steps

SP 2000 CDU to LFK 95 Cable

Standard cable 12 ft – 8 core cable screened, twisted pairs.

Cores 1 – 2 RS422 data to LFK95

Cores 3 – 4 RS422 data from LFK95

Cores 5 – 6 +ve supply

Transmitting Magnetic Compass - TMC

A TMC system transmits ship's magnetic compass heading for display below decks. The basic system comprises

• Pick off coil
• Interface and distribution box ( We have another option without the interface box. Call us for details!)
• TAPE and DIGITAL  REPEATER
• or DIGITAL DISPLAY
• Retransmission units

Simplicity and reliability is the essence, and all at LOW COST.

• PICK-OFF COIL SYSTEM
  • Pick off coil mounting on a standard binnacle compass
  • Supplied with shims and moulded 5m cable.
  • Interface and distribution box
  • Auto-calibration facility. (3 turns of ship required.)
• TMC INTERFACE AND DISPLAY UNIT:
  • INPUT: Pick off coil electronics.
  • OUTPUT: NMEA 0183 to 0.3 degree precision. 
  • Accuracy depends on calibration and adjustment of compass. Typically seen better than 2 degrees
  • Use KW991steering repeater or KW950 display

   

• POWER
  •  9 to 24v DC nominal at less than 0.3 Amp.