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Summary of Contents for AMI KW903-SP
- Page 1 KW903-SP SYNCHRO RETRANSMISSION UNIT AMI MARINE (UK) LTD...
- Page 2 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence This Page Left Blank Intentionally CLASSIFICATION: Commercial In Confidence...
- Page 3 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence Document Date Modification Number (where applicable) Issue Brief Record of Change and Reason for Change 15.08.02 Original Issue 14.10.05 Update of company contact details 15.11.07 Update of Address 16.05.08 Change of address...
- Page 4 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence This Page Left Blank Intentionally CLASSIFICATION: Commercial In Confidence...
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Page 5: Table Of Contents
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence SYNCHRO RETRANSMISSION UNIT KW903-SP TECHNICAL MANUAL CONTENTS INTRODUCTION ......................7 SPECIFICATION ......................7 MAIN TRANSFORMER ....................8 ANSCHUTZ ADAPTER ....................9 PRE - INSTALLATION CHECKS................10 INSTALLATION NOTES................... - Page 6 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence This Page Left Blank Intentionally CLASSIFICATION: Commercial In Confidence...
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Page 7: Introduction
Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence SYNCHRO RETRANSMISSION UNIT KW903-SP INTRODUCTION The RTU converts several types of gyro compass output to 360:1 synchro signals the main application being in refits on ships that already have synchro repeaters. -
Page 8: Main Transformer
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence MAIN TRANSFORMER The transformer is multi tapped as best shown in the schematic showing various connections. The standard transformer gives a 115v ref. 90v signals output but this is normally REDUCED by selecting the 132v mains input tapping. -
Page 9: Anschutz Adapter
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence ANSCHUTZ ADAPTER INPUT KW 903 LOW VOLTAGE ADAPTER FROM KW 903 BOX CONNECTS BETWEEN RTU AND REPEATERS THE UNIT TRANSFORMS THE STANDARD SYNCHRO VOLTAGE DOWN TO A NOMINAL 24 VOLTS... -
Page 10: Pre - Installation Checks
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence PRE - INSTALLATION CHECKS When a gyro is being replaced because it is old and worn out our experience shows that there will also be repeaters old and worn out. This includes electrical and mechanical faults. - Page 11 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence GYRO INPUT If the gyro has an NMEA 0183 output connect it to NMEA channel 2. This will be selected as “No. 1”. NMEA data to 0.1 deg provides a smoother output than stepper.
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Page 12: Testing The Repeaters
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence TESTING THE REPEATERS DISCONNECT SYNCHRO OUTPUT SET SWITCH TO “B” SWITCH ON! TEST FACILITY The KW903 - SP starts in a test mode. Changing the switch exercises the output even without a gyro connected. -
Page 13: Final Measurement
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence FINAL MEASUREMENT When all is satisfactory stop the rotation by selecting B but stop it if possible at a position where the phase you are measuring is taking maximum current. Switching from B to A and back quickly will nudge it into place. -
Page 14: Operational Checks
KW903, output failure or a faulty synchro repeater, shorts, etc. This is so with all transmission systems. To detect such faults a synchro monitor and off- course alarm should be fitted. The AMI KW950 is recommended. OPERATIONAL CHECKS... -
Page 15: Changing Between No 1 To No 2 Input
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence CHANGING BETWEEN No 1 to No 2 input Put a man on the wheel and check your course with magnetic compass. Change over the selector switch. The KW903-S will maintain the last synchro output state until a new changed heading comes in. -
Page 16: Principles Of Operation
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence PRINCIPLES OF OPERATION The heart of the unit is the microprocessor software in EPROM, which controls the whole input and output processing. The unit divides into convenient sections. - Page 17 AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence Synchro Power Driver A synchro transmission has three values at 120 degree offsets whose value is V* sine of angle. Thus the voltage say S1-S2 varies from 0 to 90v at 90 degrees 0 at 180 degrees and reverse phased 90v at 270 degrees.
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Page 18: Measuring Phase Shift On Output
I have made mention of the design features which minimise EMC. The ground plane of the pcb is another feature. All the tests we have made as with all other AMI products make it easy for us to certify the product as compliant with the EMC directive. -
Page 19: Final Test Procedure
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence Connect the second channel to the top end of R72. This measures the voltage across the resistor to indicate S2 current. Get a stable picture of two sine waves and draw it on paper. Please try to measure any phase shift between the two waveforms and fax us with your picture. -
Page 20: Transformer Setup
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence TRANSFORMER SETUP CLASSIFICATION: Commercial In Confidence... -
Page 21: Board Layout
AMI Manual KW 903-SP Doc No: AMI TM903-SP Issue: 4 CLASSIFICATION: Commercial In Confidence BOARD LAYOUT CLASSIFICATION: Commercial In Confidence...
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