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ELECTROMAGNETIC LOG

EML500 Series

User’s Manual

IM 80B80T10E

IM 80B80T10E

21th Edition

Summary of Contents for EML500 Series

Page 1: ...ELECTROMAGNETIC LOG EML500 Series User s Manual IM 80B80T10E IM 80B80T10E 21th Edition...

Page 2: ...3 Master Unit LT501 3 5 3 3 4 Master Indicator LR523 3 5 3 3 5 Speed Indicator LR524 single indication and LR525 dual indication 3 6 4 OPERATION 4 1 4 1 Starting and Stopping 4 1 4 1 1 Starting 4 1 4...

Page 3: ...6 6 5 Milepost Measurement Maintenance Mode 6 9 6 5 1 Automatic Milepost measurement 6 10 6 5 2 Manual milepost Measurement 6 13 6 5 3 Display Alteration Deletion of Milepost Data Maintenance Mode 6...

Page 4: ...ul 1 2007 00 Appendix 5 List of Components A 5 Appendix 6 Installation and Adjustment Certificate A 8 Appendix 7 Calibration and Measurement Record A 11 Appendix 8 Contrast of digital display and char...

Page 5: ...Blank Page...

Page 6: ...is manual No part of this manual may be reproduced in any form without our written permission Exemption from Responsibility YOKOGAWA Denshikiki makes no warranties regarding the product except those s...

Page 7: ...ved before closing the valve seawater will spew out through the valve To remove the chain fully close the valve for the HS HV and FA models Then remove the chain CAUTION Do not use a megger for inspec...

Page 8: ...subsequent chapters 1 1 Components and Their Functions 1 Master indicator GPS LOG ON OFF ARARM LOG GPS MAINT TRIP TOTAL DIST TRANS SPD ARARM MODE LT 6 7 8 9 0 CLEAR 1 2 3 4 5 ENT F1 DISPL F2 PREV MODE...

Page 9: ...220V AC SW1 power supply switch for supplying power to the entire system SW11 dip switch for switching the current output BT1 memory backup battery Power LED SW9 dip switch for switching the relay con...

Page 10: ...the seawater by a specified length The Power LED On the master unit comes on The master indicator displays the speed and total distance traveled The analog speed indicator also reads the speed Normal...

Page 11: ...nd kept in the seawater valve for a while Enter 0 1 on the numeric keypad while the speed and distance are displayed on the master indicator Only the lighting of the master indicator display and the s...

Page 12: ...axis Indicates the resultant speed and direction of a moving ship by a needle pointing to the reading dual axis 3 6 Indicates the longitudinal to transverse speed by a nee dle pointing to the reading...

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Page 14: ...peed but also the transverse speed 5 Built in self diagnostic function 2 2 Principle The principle of electromagnetic logs is based on Faraday s law of electromagnetic induction An electromotive force...

Page 15: ...he jumper setting in the power supply unit Power consumption 80 VA Insulation resistance at least 10M using 500V megger excluding electronic circuits Withstanding voltage 1500 V AC for 1 min excluding...

Page 16: ...he measuring accuracy Speed limit detection same as the measuring accuracy 7 Output Signals analog speed output 6 circuits i Voltage output Number of circuits 2 Output level Either 0 V to 5V or 1 V to...

Page 17: ...peed 20mA 4mA 0 Full Full kt Output current Ship s speed Output circuit Non isolating method Load resistance of max 250 2SC1815 250 15 V Distance pulse output 10 circuits i Photocoupler output Number...

Page 18: ...level 20 mA Output current at L level 20 mA Alarm contact 4 circuit i State of contact Setting alarm speed master indicator Dip SW9 2 master unit close in the Speed limit Hi ON Standard Lo OFF Open in...

Page 19: ...g the sensor and electronic circuits 2 4 Handling Precautions 1 If there are contaminants or microorganisms adhering to bottom of the ship or the tip of the measurement rod electrodes the indicated sp...

Page 20: ...ndicator Single axis Master unit Dimmer box GPS Optional Contact signal 2p max Photocoupler 8P max Analog speed output 2p max Power or system failure 4P max Speed limit 2P max Analog speed output 4P m...

Page 21: ...503 Seawater value LV033 For sensors 35 mm in dia LV071A For sensors 70 mm in dia LV052 For sensors 48 mm in dia inclu deing the dual axis sensor LV031 For sensors 35 mm in dia Seawater value flange L...

Page 22: ...and LV910 for sensors 48 mm in dia This is welded onto the bottom of the ship s hull to allow the seawater valve to be installed The mounting plate is ordered from the shipbuilder as standard For sen...

Page 23: ...5 LV902A 2 LV904 LV902A 3 LV901 1 LS531 LV033 LV902A 1 LS901 2 LS503 LS571 LV071A LV902A 4 LV901 3 LS503 LS541 LV052 LV910 LS503 LS542 LV052 LV910 FA2 FA1 HD1 HS1 HV1 LS503 Figure Sensor Unit Structur...

Page 24: ...stance to external devices in various signal forms For operation of the master unit refer to Section 1 2 in Chapter 1 and Sections 4 1 in Chapter 4 Figure Master Unit LT501 3 3 4 Master Indicator LR52...

Page 25: ...only and an external dim mer LD001A are available This indicator receives digital signals from the master unit and reads the analog speed by using the pulse motor 10 15 20 5 0 knots Longitudinal spee...

Page 26: ...ed Total distance traveled If the DISPL key is pressed again in a dual axis sensor system the transverse speed ap pears on the bottom line of the display If the DISPL key is pressed once more the resu...

Page 27: ...essed MODE Switching of operation mode Alarm Setting Test Function Input signal Selection log GPS Adjustment Error Code Display The operation mode switches to the next one each time the MODE key is pr...

Page 28: ...nm F 1 F 2 DISPL PREV MODE GPS nm F 1 F 2 DISPL PREV MODE MAINT F 1 F 2 DISPL PREV MODE MAINT F 1 F 2 DISPL PREV MODE MAINT 1 1 1 1 2 3 4 5 1 1 2 3 2 5 11 5 2 1 1 1 F 1 F 2 DISPL PREV MODE LOG TOTAL D...

Page 29: ...MAINT 5 A5 F 1 F 2 DISPL PREV MODE MAINT 5 A4 5 11 5 21 5 31 5 41 5 51 5 61 5 71 5 81 A11 A51 A21 A31 A41 Zero Adjustment Sensitivity Adjustment Span Adjustment Response Speed Setting Milepost Data Ha...

Page 30: ...of the display on the maintenance level As shown in the basic operation flowchart the maintenance display is switched to the next one each time the F 2 NXT key is pressed Switching of the display on t...

Page 31: ...works as a reset switch c Longitudinal and transverse speeds dual axis sensor system F 1 F 2 DISPL PREV MODE LOG TRANS SPD kt Longitudinal speed Transverse speed S right P left d Resultant speed and d...

Page 32: ...wing display appears turn on No3 of SW8 of the master unit if the GPS is connected F 1 F 2 DISPL PREV MODE LOG TOTAL DIST nm kt Speed Low Speed alarm on off Press the MODE key again The display change...

Page 33: ...the set speed is output To set the transverse speed TTS press the F 2 key while the display is at a and then use the same procedure as that for the logitudinal speed setting NOTE Push the MODE key and...

Page 34: ...isplay the flickering is indicated by the white digits on the black back ground in the figure on the left The figure on the left shows the case in which the high limit speed is set to 30 00 kt 4 4 2 G...

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Page 36: ...icated in the master unit Lamp test Do the lamp test to check the lighting of the LEDs 5 2 Periodic Inspection Inspection Item Description Frequency of Inspection Sensor Check for contamination on the...

Page 37: ...1 2 6 7 and 13 14 the voltage must be 24V DC 5 Is the speed displayed on the master indicator the same as the reading of the speed indicator Is there any error indicated on the master indicator Is 15...

Page 38: ...the master unit Replace the fuse Failure in the 24 V DC power sup ply in the master unit Error in the master unit Is 24 V DC power being sup plied YES YES YES NO YES NO YES SERVICE CALL NO NO NO NO Y...

Page 39: ...e LED error indication stay on even when the master unit is repeatedly turned on and off No Malfunctioning Yes Service call Errors in the master unit can be identified The types of errors are shown in...

Page 40: ...according to item 1 in Section 6 4 Sensitivity adjustment data Re adjust the data according to item 2 in Section 6 4 Span adjustment data Re adjust the data according to item 3 in Section 6 4 Milepos...

Page 41: ...SHIELD 24V Sensor output 0V 15V 15V SHIELD Single indication HS1 HD1 HV1 FA1 RD1 Dual indication HV2 FA2 2 Rod Case and Sensor Cross section of Connector B C D E F A G B C D E F A G Sensor output 15V...

Page 42: ...dinally M min 1M Between the electrode and rod case transversely M min 1M The purpose of this check is for confirmation if sea water entered or did not enter in Sensor Though the measured data should...

Page 43: ...e valve To remove the chain fully close the valve for the HS HV and FA models Then remove the chain 5 6 2 Precautions in Installing the Sensor NOTE 1 Install the sensor with its heading mark aligned w...

Page 44: ...the rod meter The length of rod meter 450 mm from the top of tank at a double bottom c When pull out the rod meter do not remove the chain setting until the sea valve is closed perfectly Confirm main...

Page 45: ...ng on the display The operation flow on the left gives an example of setting 20 To do this first enter 2 and 0 using the numeric keypad Confirm that the values has just been entered and then press the...

Page 46: ...00 bps OFF 4800 bps factory setting 5 No 5 Not used 6 No 6 Not used 7 No 7 Not used 8 No 8 LR221 Connection ON no connection OFF connection factory setting 6 3 2 Analog Indicator 1 No 1 No 2 No 3 Spee...

Page 47: ...l operation this switch must be off to protect data in the memory SW No ON OFF Remarks 1 Not used Fixed 2 Dual axis Single axis Type of sensor 3 Connection No connection GPS sensor 4 Ground speed Wate...

Page 48: ...9600 bps 1 4800 bps Factory setting 2 F SW4 Analog output setting 0 1 2 3 4 5 6 7 8 9 A B C D E F Procedure of selection vide 6 7 SW No Analog output 0 a of 2 3 7 1 b of 2 3 7 SW11 Output setting of T...

Page 49: ...lect zero adjustment The display then changes to that marked a The values high lighted in reverse video here are the zero adjustment data that were the latest set To make a new zero adjustment press t...

Page 50: ...for example first press the F 1 key to change the sign to see the dis play marked b Next enter 0 4 0 and 0 using the numeric keypad Confirm the entered value and then press the ENT key This stops the...

Page 51: ...he display To select LSP Longitudinal span press the F 1 key while the display is at a The display then changes to that marked b The value highlighted in reverse video here is the adjustment data that...

Page 52: ...peed and the ship must take the correct course between mileposts In milepost calibration the ship makes a round trip 2 one way trips or a round trip plus another on way trip 3 one way trips to obtain...

Page 53: ...nter 1 0 0 and 0 in this order from the numeric keypad Manual milepost mode Press the F 2 key HND while the display is at a to select the manual mode The display then changes to that marked b The valu...

Page 54: ...F 2 key NO while the display is at i This allows the display to ad vance to j the operations for the trip back start from here The operations and display at j to m are the same as those for the trip o...

Page 55: ...en advances to Step t To acquire another set of data press the F 1 key CONT To finish the milepost measurement press the F 2 key END The screen then returns to Step a NOTE If the DISPL or PREV key is...

Page 56: ...Milepost Data Refer to Subsection 6 5 1 for details on the operation 6 5 3 Display Alteration Deletion of Milepost Data Maintenance Mode Milepost data can be displayed altered added or deleted as fol...

Page 57: ...linearizer which is represented as line graph in 5 kt increments on the measured log speed axis as shown below 10 10 20 30 40 50 60 20 30 40 50 60 0 knots knots Measured log speed Calibrated log spee...

Page 58: ...displayed items in the order shown in the figure below The number at the beginning of the top line of the display means the log speed level in the linearizer table F 1 F 2 NXT BFR 5 kt Data on the ta...

Page 59: ...ch time the F 1 key ALPH is pressed A to Z A C0h Z 0Dh 0Ah CR LF and a blank space appear one after the other in the space highlighted in reverse video see the display marked c If the F 2 key NXT is p...

Page 60: ...other in this order 1 15 2 1 15 each time the F 1 key NXT is pressed 15 1 5 bits Pressing the ENT key allows the display to ad vance to p At p set the parity bits Note 3 The values ODD EVN and NON app...

Page 61: ...the display re turns to a where 0V to 5V is selected Setting of Master indicator 5 A41 a Setting of digital SW4 0 1 F1 5V Full 0 kt Output voltage Ship s speed 5V Full Full kt 0 Output voltage Ship s...

Page 62: ...terface setting L S B M S B Start bit DATA bits Stop bit Data format conforms to NMEA0183 V M V B W DATA SUM1 SUM2 CR LF VM Electromagnetic log VBW Nautical speed End of sentence Checksum Identificati...

Page 63: ...kt A Valid V Invalid V Invalid VHW data Only kt value data is available 10 1 10 0 10 1 10 2 N K N kt K km h Longitudinal speed kt VLW data 10 3 10 2 10 1 10 0 10 1 10 2 N 10 3 10 2 10 1 10 0 10 1 10 2...

Page 64: ...VHW data N K VLW data N N 1 Whenever the A D conversion error is detected system error will occur in case of the EML input Whenever the Communication error No 2 with the GPS is detected system error w...

Page 65: ...0 0 10 1 10 2 N Total distance traveled nm Trip distance nm N nm N nm EML input single axis system VBW data 0 10 1 10 0 10 1 10 2 A V V V V Longitudinal speed kt A Valid V Invalid V Invalid V Invalid...

Page 66: ...nversion error is detected system error will occur in case of the EML input Whenever the Communication error No 2 with the GPS is detected system error will occur in case of the GPS input In this case...

Page 67: ...The display then chang es to that marked a At a the display indicates that coefficient 1 C1 is currently selected To select coefficient 2 C2 in stead press the F 2 key while the display is at a The d...

Page 68: ...procedure is shown below At 5 A2 press the F 1 key to select the volt age check mode The display then change to that marked a At a to c pressing the F 1 key NXT causes the next voltage value to appea...

Page 69: ...nges to that marked b and a fixed voltage of 5V is output If the F 1 key is pressed while the display is at b the display returns to a and a fixed voltage of 0V is output 6 10 ErrorCodeDisplayMode Sub...

Page 70: ...OL 1 22 SHLD 1 23 VOL 2 24 VOL 2 25 SHLD2 26 13 24V S 14 GND S 4 15V 5 15V 9 YSPD 10 XSPD 15 SHLD5 6 24V D 1 1 24V A 1 2 GND A 2 3 SHLD3 3 9 SD1A1 4 10 SD1B1 5 7 GND D 2 8 SHLD4 3 29 SD1A2 4 30 SD1B2...

Page 71: ...1 Chip CPU DATA BUS ADRS BUS BUFFER LATCH DRIVER 15V DIG SW DIP SW I V CONV I V CONV 1 2 3 4 5 TB1 TB3 TB3 TB1 TB1 TB1 TB1 TB3 TB3 TB2 Sample hold Sample hold Sample hold Sample hold D A CONVERTER ref...

Page 72: ...DC DC CONV 24V VCC POWER UNIT PROCESSOR UNIT DISPLAY UNIT KEY SW MATRIX I O DECORDER DRIVER LATCH CTC DECORDER DRIVER LED DISPLAY COL DRIVE SIG COL SELECT DATA DIMMER PLS BUFFER V INKEY SCAN SCAN INKE...

Page 73: ...A15 A0 D7 D0 TxD RxD 32k 128k 128k effective 32k PIO CH A PIO CH B DATA BUS ADRS BUS 24V GND FG RD A RDB TD A TD B SHLD 1 2 3 4 5 6 7 8 9 10 DATA BUS D7 D0 CONTROL SIGNAL MOTOR DRIVER STEP MOTOR 1 zer...

Page 74: ...2 Master Indicator LR523 No Component Part Number 1 Display V8308WD 2 Processor V8308WB 3 Power supply V8303WC 4 Sheet key unit V8308AC 3 Speed Indicator LR524 No Component Part Number 1 M D U assembl...

Page 75: ...embly FE0 LS531 01 8 Sensor 35 mm in dia LS501 No Component Part Number 1 Sensor assembly FE0 LS501 01 9 Single indication 48 mm in dia LS541 No Component Part Number 1 Sensor assembly FE0 LS541 01 2...

Page 76: ...Part Number 1 O ring 5T101Z005 35 2 Seawater valve 5T800C010 15 Seawater Valve LV071A No Component Part Number 1 O ring 5T101Z005 61 2 Seawater Valve 5T800C008 02 16 Seawater Valve LV052 No Component...

Page 77: ...ate After installing and adjusting the EML500 system please fill in the Installation and Adjustment Certificate on the following page and return a copy to Yokogawa Denshikiki Co Ltd keep the original...

Page 78: ...wer supply Delivery date of the ship G P manufacturer Model Date of navigation test GPS manufacturer Model Installation and wiring have been confirmed and final adjustments have been completed as foll...

Page 79: ...1 5 2 Parity Odd Even None Character length 7 8 Analog voltage current ouput range 0V to 5V 0mA to 20mA 1V to 5V 4mA to 20mA Zero adjustment value kt Sensitivity adjustment value Span setting LSP tim...

Page 80: ...ETIC LOG CALIBRATION AND MEASUREMENT SHIPYARD VESSEL PLACE DEPTH OF SEA DRAFT WATHER SEA CONDITION TIME OF DAY FORE AFT MEAN FINAL CONFIRMATION DATA RUN NO MAIN ENGINE TIME REQUIRED SPEED WIND SPEED D...

Page 81: ...1 2007 00 Appendix Appendix 8 Contrast of digital display and character for Master Indicator Contrast table Chracter Display Character Display Character Display A Q 0 B R 1 C S 2 D T 3 E U 4 F V 5 G...

Page 82: ...TEST RUN LOG MAINTENANCE SUB GPS TOOL 0 ADJST GO SET LONGITUDINALSPAN NEXT TRANSVERSE SPAN AUTO START HAND STOP DISTANCE CANCEL RESET CONTINUE 1ST END 2ND BEFORE 3RD LONGITUDINALTEST YES TRANSVERSE TE...

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Page 84: ...999 13th Edition Sep 1999 14th Edition Apr 2001 15th Edition Mar 2002 16th Edition Nov 2002 17th Edtion Jun 2003 18th Edtion Nov 2004 19th Edition Jun 2006 20th Edition Jul 2007 21th Edition n Inquiri...

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