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SATELLITE COMPASS
SC-50/110
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The paper used in this manual is elemental chlorine free. FURUNO Authorized Distributor/Dealer FURUNO Authorized Distributor/Dealer 9-52 Ashihara-cho, 9-52 Ashihara-cho, Nishinomi Nishinomiy ya 662-8580, JAPAN a 662-8580, JAPAN Tele Telep phone : hone : 0798-65-2111 0798-65-2111 Fa Fax x 0798-65-4200 0798-65-4200 :: FIRST EDITION : FIRST EDITION : NOV. NOV. 2005 2005 A All ri ll rig ghts reserved. hts reserved. Printed in Japan Printed in Japan Pub. No. Pub. No. SME-72510-A SME-72510-A *000158
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Contents 1. Overview ...................................................................................... 1 2. Maintenance Menu ....................................................................... 2 1) MONITOR display ..............................................................................2 2) COMPASS display .............................................................................3 3) R MONITOR display .......................................................................
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1. Overview The satellite compass, SC-50/110 calculates the heading by using the carrier signal of the GPS satellite signals. The system also calculates the heading with three rate sensors. When the satellite signal is blocked, the system outputs the heading data based on the rate sensor signal for a maximum of 5 minutes. The system always compares GPS heading with rate sensor heading. If the difference between two exceeds the preset value, an alarm is generated. The system needs abou
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2. Maintenance Menu The system provides TEC menu or Maintenance menu for servicing. To show TEC menu, press and hold down MENU and ENT keys simultaneously until the menu appears after three beeps. It takes about 8 seconds to hear the third beep. Release the finger from MENU key, and then ENT key. If you release the finger from ENT key first, Main menu appears. This procedure is the same as SC-60/120. TEC MENU HDG SETUP MONITOR COMPASS R MONITOR R-CALIB
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2) COMPASS display MASK-EL is used to set a minimum elevation angle of the satellite. The satellite of which elevation angle is lower than MASK-EL is not used for heading calculation. Default: 5 degrees. DO NOT change GPS DELAY, TIME CONST, SDEV-S, SDEV-C, and CHK NEW SV. COMPASS MASK-EL : 05° GPS DELAY : 0.220 SEC TIME CONST : 01 SEC SDEV-S : 0.0016 SDEV-C : 0.0069 CHK NEW SV : 0.20 Fig.4 COMPASS display 3) R MONITOR display “Rate sensor Monitor” d
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4) R-CALIB display R-CALIB (Rate sensor Calibration) is used to enter the calibration value of the rate sensor at factory. It is not necessary to change this value when the rate sensor is replaced with new one. However, the value on top of the original sensor is written on top of the replacement sensor for future service. R-CALIB S1 : +0.0% S2 : +0.0% S3 : +0.0% Fig.6
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5) RATE ERR display This menu sets the level to trigger the heading error alarms; NO HEADING OUTPUT and RATE ERROR. The system compares the output of the angular rate sensor with one obtained by the GPS signal. In the following example, an error is detected when the difference is 2.0º or more. An alarm is generated according to SHIFT CONT setting. In the example below, an alarm is generated when Roll sensor has four consecutive errors. YAW LIMIT: Used to detect Yaw output error. Success
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7) ALARM display This menu sets the ALARM port signal. When ALARM MODE is set to “STOP,” the alarm signal is not sent out after acknowledgement. When selected “Continue,” the system continues to output the alarm signal. ALARMS ALARM MODE : STOP BUZZER FREQ : 2.075 kHz Fig. 10 8) ANALOG display This menu is used to test and compensate the motion sensor output signal. Set the desired angle on the ANGLE line and the set angle data is output from “ROLL” and “PITCH
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The display consists of four indications; a circular graph which shows direction where the tracking error rate is the highest, a bar graph which shows tracking error rates in 12 directions, mutlipath indexes, and elapsed time. Circular graph: Shows the relation of 12 directions to the bow. The direction of the highest tracking error rate and its opposite direction are painted. Note that the sectors are painted even when no heading loss problem occurs. Bar graph: Shows tracking error r
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10) MESSAGE display Error messages appear in the display. If RATE ERROR! appears, first check Installation Setup menu for correct setting: “Mounting” method and “Direction.” MESSAGES • NO HEADING OUTPUT ! • HEADING ERROR ! • RATE ERROR ! (YAW) Fig.14 Error Message display 11) REC MONI menu The REC MONI display, Figure 15 shows whether the system works normally or not. The GPS receiver having the least tracking error rate reads 1.0. The error rate of other receivers
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3. Replacement of Battery The processor unit has a battery which backs up the RAM contents when the power is removed. When the voltage of the battery drops to 2.5 V, the message “BATTERY!” appears on the screen. To check the message, press [MENU] key and choose “MESSAGE.” The lifetime of the batteries is 3 to 5 years. CAUTION! Take care to avoid short-circuit of the battery. This could create a burn or fire hazard. Do not dispose of the battery in a fire or an incinerator; this may ca
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5. Program Upgrade The three programs are used for the SC-50/110. Two programs are used in the processor unit and one program is in the display unit. The program numbers are tabulated below. Note that the program number of SC-50 is the same as SC-110, but they are different. The program for SC-50 cannot be overwritten by the one for SC-110 in the field and vise versa. (As of February 2005) Unit Board Program No. How to update MAIN board 205-1341-01.02 By using a PC Processor unit GP
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2) CPU board (Display unit) To upgrade the program on the CPU board; 1. Connect the serial port of the PC to J15 on MAIN board in the processor unit. 2. Turn on the PC. Do not as yet turn on the SC-50/110. 3. Click the SCUP.bat file in the SC-50/110 program file. 4. Turn on the SC-50/110 after the message “TARGET POWER ON” on the PC screen. 5. “NOW LOADING” appears on the SC-50/110 display unit, while “Now Erasing,” and “xxx percent completed” appear during program upgrade on the PC scre
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6. Maintenance 6.1 Adjustment 1) PWR board Switching regulator frequency is adjusted on PWR board, 20P8181 as below. Test Point GND Rating Adjuster TP2 TP1 120.0 kHz ± 10 kHz VR79 TP5 TP3 120.0 kHz ± 10 kHz VR80 2) MAIN board Vcc-c supply voltage to Rate sensor is adjusted by VR96 on MAIN board, 20P8178. Test Point GND Rating Adjuster #1 of J20 #2 of J20 5.0 V (Vcc-c) VR96 6.2 Line voltage check Line voltages are checked at J3 on the MAIN board. Line voltage Test Points on M
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7. Location of Parts Rate Sensor Rate Sensor (Default: Yaw) (Default: Roll) Rate Sensor (Default: Pitch) PWR Board (20P8181) GPS Receivers (1, 2, 3 from Top) Main Board (20P8178) Fig. 17 Processor Unit with cover removed F1, 3A TP2 TP1 TP4 Fig.18 PWR Board, 20P8181 TP3 TP4 VR80 VR79 (not shown) 13
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Log/Alarm Beacon Ext D Data out 6 ata out 1 to 5 Roll (above) Data In (AD-10) (from right, IEC or AD-10 Heading data) Pitch J3 J15 for system update R96 CR3 (CPU), Blinking TP1 No short bar BT1 J20 J19 J18 (for R&D) JP1 (CR2450-F2ST2L) Fig.19 MAIN Board, 20P8178 14
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Appendix 1 Protection of ICs in Data Output Circuit Appendix 1 describes how to prevent ICs in the data output circuit temporarily. Refer to Appendix 2 for permanent remedy. Symptom U1, U2, and U3 in the heading output circuit are damaged. Cause Ground potential difference - The cable shield, or a signal return path between the circuit grounds of the equipment is not connected securely. The shield is connected to the unit through the cable clamp on SC-50/110, while the connector
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1. Fabrication of Signal Cable The signal cable is fabricated as below. DO NOT hold back the cable shield over the armor. The installation manual will be revised. 80 Armor 70 Twist and cut. FV1.25-M3 Solder Grounding wire 40 Remove coat for clamping. 80 Armor Twist and cut. 70 FV1.25-M3 Solder Grounding wire 40 Vinyl tape Remove coat for clamping. Fig. 2 16
