Furuno DS-80 manual Correction Factor for Analog Display MF-22A-1

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ANALOG DISPLAY UNIT

CORRECTION DIAGRAM AT EXTREME TEMPERATURES

Doppler Speed Log DS-80

CORRECTION FACTOR FOR ANALOG DISPLAY MF-22A-1

Example:

If the analog speedometer reads 14.2 kt at a temperature of –15°C, the correct speed through the water is 15 kt. Failure of correction in low temperature can result in a maximum error of –0.8 kt or 5.3% for 14.2 kt readout. IMO limit of ± 2% is exceeded over 10.0 – 30.0 kt reading but correction by this graph brings a correct measurement.

At +55° C, an error of +0.0 kt (+2.7%) occurs at a speed of 30 kt; no other point IMO limit of

±2% is exceeded.

When the digital display and analog display readouts are different, take precedence of the digital readout. At temperatures 0° C to 50° C, the speedometer never exceeds the IMO limits.

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Contents Doppler Speed LOG 00080889601 Safety Instructions Record of Modifications in this OPERATOR’S Manual Table of Contents This page is intentionally left blank Specifications of the Doppler Speed LOG Safety Precaution Features ForewordForeword Distribution BOX System ConfigurationPrinciple of Operation Remarks on Usage Remarks on UsageConditions Affecting the Accuracy Beware of Transducer LocationPower on Turning the Power On/OffPower off Operation of Display UnitSelecting a Display Adjusting Contrast, Panel DimmerContrast Panel dimmerDistance Run Operation Main Menu OperationSelecting display method To enter numerical dataResetting distance run to zero Adjusting distance runSelect Data Display and press the ENT key Press the Omnipad at to select onDisplaying the system menu System SettingShip speed average Speed offset calibrationTransducer offset Speed data selectionSelect Track Depth and press the ENT key System menu Demonstration ModeAdjusting dimmer and contrast Digital Indicator DS-830, Distance Indicator DS-840Operation of Optional Equipment Selecting a displayCorrection Factor for Analog Display MF-22A-1 Maintenance MAINTENANCE, TroubleshootingPreventive maintenance Transducer maintenanceProblem Probable cause Remedy General TroubleshootingDoppler speed indication GPS speed indicationDiagnostics, Checking Program Number Press the ENT key. The following display appearsControl Indication Input sentences of IEC61162RX port I/O SentencesOutput sentences of IEC61162TX1, IEC61162TX2 ports Transmission intervalIEC61162 RX port Schematic diagramsIEC61162 TX1 port Output drive capability Max mAIEC61162 TX2 port Sentence Description GGA Global positioning system GPS fix dataTime, position and fix related data for a GPS receiver Actual course and speed relative to the ground VTG Course over ground and ground speedWater-referenced and ground-referenced speed data VBW Dual ground/water speedLongitudinal speed astern. * Not used VLW Distance travelled through the waterParts Location Parts Location and Parts ListDisplay unit DS-800 Distribution box DS-801Transceiver unit DS-810 Parts List Ref.Dwg C3441-K01-C 2000-01 Block.No Model DS-80 UnitNoise Filter Ref.Dwg C7247-K02-A 2000-01 Block.NoRef.Dwg C7247-K03-A 2000-01 Block No Calibration Sheet Menu Overview Default settings in bold italicDistance run Index