Simrad EY500 Instruction Manual Download Page 123 | Manualshive

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Theory of operation

P3403E/A

3

List of contents

1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     5
1.2 THE TRANSCEIVER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     5
1.3 THE SIGNAL PROCESSING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .     5

2 POWER BUDGET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 EY 500 DB FORMAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 BOTTOM DETECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 BOTTOM RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 ECHO INTEGRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

7 SPLIT-BEAM OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

8 IMPULSE RESPONSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

9 NOISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

10 ABSORPTION COEFFICIENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

11 SOUND VELOCITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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Summary of Contents for EY500

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Page 7: ...400 B 1 SYSTEM FAMILIARIZATION P3400E 857 160017 4AA062 This section contains a description of the system modules of the EY 500 sounder system It also contains a simplified block diagram and technical...

Page 8: ...System familiarization 2 P3400 B Document revisions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 25 08 95 CL 25 08 95 HS 31 08 95 RB...

Page 9: ...Y 500 P3400 B 3 List of contents 1 INTRODUCTION 5 1 1 GENERAL 5 1 2 DESCRIPTION OF THE EQUIPMENT 6 1 2 1 Configuration 6 1 2 2 Simplified block diagram 7 1 2 3 Interconnections 8 2 TECHNICAL SPECIFICA...

Page 10: ...B Document history The information on this page is for Simrad s internal use Rev A Original issue First edition as module Was section 1 of P2473E Rev B Change in text on page 10 and more detailed pri...

Page 11: ...fish Monitoring biomass from buoys Pollution monitoring Dam surveillance systems The collected data is processed on line for generation of colour echograms and tables giving fish densities in up to 1...

Page 12: ...ent Modem Remote control Figure 1 EY 500 system modules 1 2 DESCRIPTION OF THE EQUIPMENT 1 2 2 Configuration The EY 500 sounder system comprises Transducer Transceiver PC Power supply Colour printer o...

Page 13: ...e Technical Specifications The EY 500 transceiver requires a supply voltage of 10 to 40 VDC and can be powered from a battery or from an AC power source via an AC DC converter 1 2 4 Simplified block d...

Page 14: ...m and is a 1 1 connection PRINTER 25 pin D conn female for connection to the printer input The printer cable is a standard Centronics cable and should be max 5 m TRANSDUCER 12 pin Amphenol military st...

Page 15: ...echo signal amplitude Layers Up to 10 surface or bottom locked layers Integrator Virtually unlimited dynamic range Inde pendent integration within each layer Data storage Selected EY 500 data and echo...

Page 16: ...files can be presented on display and printer On line monitoring of echograms can be done via serial interface Sa and TS values can be calculated in selectable layers off line Minimum PC specification...

Page 17: ...eam type Power W Pulse duration ms Bandwidth kHz Resolu tion cm Narrow Wide 37 878 Single 250 0 3 1 0 3 0 0 38 3 8 10 70 422 50 0 2 0 6 2 0 0 7 7 0 5 119 047 60 0 1 0 3 1 0 1 2 12 0 3 200 000 60 0 06...

Page 18: ...8 7x7 25 350 150 600 190 100 490 200 30 30x30 15 110 40 600 85 35 290 710 30 5x5 15 75 40 160 65 35 130 710 36 2 5x2 5 15 95 60 180 80 50 150 These transducers can be hull mounted foil mounted or prov...

Page 19: ...on Supply voltage Power consumption Operating temperature Dimensions Weight 210 mm 720 pixels across paper 187 264 VAC 50 60 Hz 90 132 VAC 50 60 Hz 21 31 VDC 20 W max 0 55EC W442 x H98 x D302 mm 5 kg...

Page 20: ...System familiarization 14 P3400 B...

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Page 35: ...02 C 1 OPERATION P3402E 857 160019 4AA062 This section contains information about the interactive menu system the echogram layout on display and printer the file system operation examples and descript...

Page 36: ...sions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 25 08 95 CL 25 08 95 HS 31 08 95 RB B 15 08 96 CL 19 08 96 HS 19 08 96 RLN C 22 0...

Page 37: ...2 3 1 The Display Echogram Menu 31 2 4 THE PRINTER MENU 36 2 4 1 The Printer Echogram Menu 39 2 5 THE TRANSCEIVER MENU 40 2 6 THE BOTTOM DETECTION MENU 47 2 7 THE LOG MENU 49 2 8 THE LAYER MENU 51 2 8...

Page 38: ...istory The information on this page is for Simrad s internal use Rev A Original issue First edition as module Was section 3 of P2473E Rev B Update from software version 5 00 to 5 20 Rev C Update from...

Page 39: ...cursor one line up or down in the text The keyboard arrow pointing to the right is used for moving into different levels in the menu and for entering values The arrow pointing to the left is used for...

Page 40: ...nsitivity The various elements of the display and printer echograms are described in paragraphs 1 2 3 and 1 2 4 1 2 2 The colour scale The echogram has a colour scale which is proportional to the stre...

Page 41: ...are enabled by the corresponding parameters in the menu system In figure 2 arrows and numbers from 1 to 7 point out the different topics explained below 1 Layer lines Layer lines appear when the LAYE...

Page 42: ...blanked out if no bottom detection has been done If SUB BOTTOM GAIN is set above 0 0 dB m the bottom range presentation will feature an excess gain below the detected bottom 4 Integration line INTEGRA...

Page 43: ...Simrad EY 500 P3402 C 9 Figure 2 Display echogram 1 Layer line 2 Super layer line 3 Bottom range echogram 4 Integration line 5 Event marker 6 Scale line 7 Bottom detection line...

Page 44: ...Operation 10 P3402 C Blank page...

Page 45: ...AY Echogram Menu is set greater than 0 the selected number of dotted equidistant lines will be written across the echogram 7 Bottom detection line The bottom detection line may be introduced for easy...

Page 46: ...ogram Menu If the bottom range is enabled 20 of the main echogram is overwritten by this bottom referenced echogram The echogram may include several lines and text strings which are enabled by the cor...

Page 47: ...ck on the twenty third of January in the year nineteen ninety three 6 TS distribution table The layout for the TS distribution results is shown below TS max 14 0 dB TS step 1 5 dB 50 47 44 41 38 35 32...

Page 48: ...imit is reached the integration results will be printed across the paper The format consists of 11 columns where the 10 rightwards columns have identical layout The left column carries the log distanc...

Page 49: ...ion line is controlled from the PRINTER Echogram Menu 12 Scale lines As for display echogram except that the scale lines are controlled from the PRINTER Echogram Menu 13 14 Range and identification fi...

Page 50: ...ogram except that the bottom detection line is controlled from the PRINTER Echogram Menu The SCOPE option is very nice to use during calibration sequence for justi fication of measured data on referen...

Page 51: ...ogram 1 Layer lines 2 Super layer 3 Nautical mile text 4 Annotation 5 Date and time 6 TS distribution 7 Integration table 8 Event marker 9 Navigation text 10 Bottom range 11 Integration line 12 Scale...

Page 52: ...Operation 18 P3402 C Blank page...

Page 53: ...Simrad EY 500 P3402 C 19 Figure 4 Scope plot showing 300 samples of transceiver data...

Page 54: ...n the Transceiver Menu is set to ACTIVE and that ECHOGRAM is enabled To check this Select the Transceiver Menu Check that MODE is ACTIVE Select the Display Menu Check that ECHOGRAM is set to ON The us...

Page 55: ...nd target strength distribution and TS distribution bar graph in the TS Detection Menu the log system must be turned on Select the Log Menu Set MODE to PING 5 Defining the layer picture The layers in...

Page 56: ...ion bar diagram TS Detection Menu and the TS window TS Detection Submenu may be useful to study as well as the integration tables printed together with the echogram on the printer Scope data may be st...

Page 57: ...100849 DG4 12 10 08 49 DG 4 Month Day Hours Minutes DG Year 2 digit identifier 1 12 2 digit identifier 1 31 2 digit identifier 1 23 2 digit identifier 1 59 EY 500 data gram 1 digit identifier 1 9 A li...

Page 58: ...is used both the Sample Power and the Sample Angle telegrams must be turned on Return to the Disk Menu and turn on Log to start storing of sample data Note that the Max File Size in the Disk Menu may...

Page 59: ...egrams above are turned on when logging data Also notice that when this survey information from Navigation and Vessel Speed is used the replay function makes possible a complete offline rerun with new...

Page 60: ...nu system and consists of a list of the menus available in the system MAIN MENU OPERATION MENU DISPLAY MENU PRINTER MENU TRANSCEIVER MENU BOTTOM DETECTION MENU LOG MENU LAYER MENU TS DETECTION MENU DI...

Page 61: ...n occurs when this parameter is NORMAL provided the transceiver is in the ACTIVE mode When Ping Mode is set to REPLAY the file selected in the Disk Menu will be replayed EXT TRIG provides synchronizat...

Page 62: ...as the selected ping interval a warning will be given and the ping will be delayed one or more ping intervals Normal operation is 0 0 i e the sounder will ping as fast as possible only delayed by sou...

Page 63: ...ment across the screen and for switching the echogram presentation on and off The Display Menu also contains the entry line for the Echogram submenu Colour Set Options LIGHT DARK MONO Various display...

Page 64: ...is displayed With setting 1 2 every second ping is displayed with setting 1 3 every third ping is displayed etc Note that this is to slow down the display echogram speed only and has no influence on...

Page 65: ...the desired echogram presentation on the screen A special bottom echogram may be selected This echogram is referred to the bottom and its range may cover areas both above and below the bottom The bot...

Page 66: ...OFF Auto Range Options OFF ON Automatic adjustment of Range Start aimed at maintaining the bottom echo inside the echogram When Auto Range is ON the Range Start value will be ignored Bottom Range Opti...

Page 67: ...de the echogram Sub Bottom Gain Options 0 0 to 5 0 dB m in 0 1 dB m steps This command may improve visual presentation of sub bottom echoes When set to 0 5 dB m an excess gain of 0 5 dB per meter belo...

Page 68: ...n of target strength Scale Lines Options 0 to 250 lines in steps of 1 Allows you to enter a number of equidistant scale lines across the echogram Scale lines disabled by setting value to 0 Bot Det Lin...

Page 69: ...GRATION in section Theory of Operation TS Colour Min Options 100 to 0 dB in steps of 1 dB Lower limit of colour scale relative to target strength If for example this parameter is set to 50 dB the lowe...

Page 70: ...kJet To select between printer types The echogram layout for the two printers are identical except that the DeskJet does not have continuous paper feeding To indicate the sequence of the echogram the...

Page 71: ...n Options OFF ON When ON annotation messages received via the keyboard will be printed Naut Mile Marker Options OFF ON When ON every nautical mile will be indicated on the echogram paper if the LOG MO...

Page 72: ...3 every third ping is displayed etc This in order to get a more compact history on the echogram or to increase the ping rate Echogram Options OFF ON SLAVE To select printout of echogram When SLAVE is...

Page 73: ...ogram Menu Also refer to the description of the printer echogram in paragraph 1 2 4 Presentation Options NORMAL WH LINE and CONTOUR as in the DISPLAY Echogram Menu SCOPE presentation is intended for s...

Page 74: ...he start up mode it will read this signature and fetch the parameters corresponding to the installed transceiver There are several transducer types associated with each frequency and a list of the rel...

Page 75: ...the signature read from the transceiver The transducer type connected to the system should be selected When set to OTHER the operator may enter the relevant specifications if a non standard transducer...

Page 76: ...dividually for each transducer number Transducer Depth Options 0 00 to 999 99 m in steps of 0 01 m Installation depth of transducer relative to the sea surface Absorption Coef Options 0 to 300 dB km i...

Page 77: ...Your may select between WIDE and NARROW manual bandwidth or AUTO for automatic selection A narrow bandwidth results in little noise but a poor pulse response A wide bandwidth lets through more noise...

Page 78: ...dB in steps of 0 1 dB Equivalent two way beam opening solid angle Refer to paragraph POWER BUDGET in section Theory of Operation Sv Transd Gain Options 0 00 to 99 99 dB in steps of 0 01 dB Peak transd...

Page 79: ...tships direction Angle sensitivity of split beam transducer electrical angle in degrees for one mechanical angle in degrees Refer to paragraph SPLIT BEAM OPERATION in section Theory of Operation 3 dB...

Page 80: ...set angle in the fore and aft direction Refer to paragraph SPLIT BEAM OPERATION in section Theory of Operation Athw ship Offset Options 9 99 to 9 99 degrees in steps of 0 1 degree Mechanical offset an...

Page 81: ...Operation Setting minimum and maximum depths to 0 will disable the bottom detector and will be important when pinging horizontally Layers should then be of pelagic type since the latter do not requir...

Page 82: ...than depth setting A depth setting of 0 0 meter disables the alarm Max Depth Alarm Options 0 to 5 000 m in steps of 1 m Alarm when detected depth exceeds depth setting A depth setting of 0 meter disab...

Page 83: ...ble to set the mode to OFF and then initiate outputs of the log result This is useful when uneven distance intervals are needed Mode Options OFF PING TIME SPEED REPLAY The log mode is either OFF based...

Page 84: ...used by the statistical algorithms are entered in units of seconds Dist Interval Options 0 1 to 10 0 nautical miles in 0 1 nm intervals The averaging interval along the path travelled by the vessel us...

Page 85: ...applies to split beam transceiver only within each layer Size distribution and echo integration tables may be printed by the printer and stored on hard disk However for one of the layers the super lay...

Page 86: ...ayers Various special functions are related to this layer TS bar chart on display fish behaviour window on display integration line on display and printer SCOPE on printer and display The super layer...

Page 87: ...OFF SURFACE BOTTOM PELAGIC A layer is either OFF referred to the sea SURFACE bottom detection required for integration and TS measurements referred to the detected BOTTOM or PELAGIC referred to the s...

Page 88: ...Options 0 0 to 10 0 m in steps of 0 1 m The margin parameter causes a surface layer to stop at the margin distance above the detected bottom and a bottom layer to stop at the margin distance below the...

Page 89: ...e displayed as a TS bar chart which is updated every log interval An example is shown below The bar colours correspond to echogram colours only when the Min Value in the TS Detection Menu is equal to...

Page 90: ...gth 1 5 Max Gain Comp 4 0 dB Max Phase Dev 4 0 Refer to paragraph SPLIT BEAM OPERATION in section Theory of Operation Single fish detections inside the super layer are displayed in a fish behaviour wi...

Page 91: ...ulse must exceed this parameter Max Echo Length Options 0 0 to 10 0 in steps of 0 1 A single echo detection requires the normalized echo length to be less than the max echo length setting Max Gain Com...

Page 92: ...not exceed the max phase deviation setting where max phase deviation is set in units of phase steps 64 phase steps 180 electrical degrees This parameter controls one of several mechanisms for isolatin...

Page 93: ...or defining the limit of the file containing the current data telegrams The Telegram Menu is used to select which data to be sent to the disk The Echogram Menu is used to set up the echogram to be sen...

Page 94: ...ng Directory Options To select the directory path to be used for logging or replaying The path may include several subdirectory levels Both the and the may be used in the path name Replay File Name Op...

Page 95: ...disk The selected data is collected in a file which has the file name setup described in paragraph 1 4 The sample range sets the total range per ping for the sample data telegrams The following table...

Page 96: ...nd echogram data Echo Trace E1 Number of echo traces single fish detections target depth m compensated TS dB uncompensated TS dB alongship angle degree athwartships angle degree Sv S1 Layer identifier...

Page 97: ...f Bot Val 75 TVG 20 log R The DISK Echogram Menu is used to set up the echogram to be sent as a telegram to the hard disk Range Options 1 m 250 m 5 m 500 m 10 m 1000 m 15 m 1500 m 25 m 2500 m 50 m 100...

Page 98: ...of bottom echogram Bot Range Start Options 100 m to 100 m in steps of 1 m This command sets the upper start depth of bottom echogram relative to detected bottom depth positive values above the bottom...

Page 99: ...which transmission loss compensation algorithm is to be used TVG Time Variable Gain 20 log R is selected for echogram presentation of volume back scattering strength and 40 log R for presentation of...

Page 100: ...or entry to the different Serial Communication submenus The default COM2 port on the PC is used for this serial line input output COM1 is used for navigation input Switching between COM1 and COM2 can...

Page 101: ...Off TS Distribution Off This menu basically controls the composition of output data telegrams on the serial port For details about telegrams refer to section Description of Telegrams and Remote Contr...

Page 102: ...s enables the echo sounder to be called remotely and for data to be transferred through the telephone network Remote Control Options OFF ON Ignore or interpret input telegrams Status Options OFF ON Er...

Page 103: ...NMEA telegram Echogram Options OFF ON This output telegram may be used by postprocessing systems e g EP 500 or BI 500 and allows an entire cruise to be replayed off line on a general purpose com puter...

Page 104: ...ical mile generated in simulated vessel speed Layer Options OFF ON Output telegram containingthe layer parameter settings every averaging interval Integrator Options OFF ON Output telegram containing...

Page 105: ...rate bits per character number of stop bits and parity for serial telegrams Baudrate Options 300 9600 600 19200 1200 38400 2400 57600 4800 115200 Baudrate in bits per second RS232 port Bits per Char O...

Page 106: ...50 No of Bot Val 75 TVG 20 log R This menu is used to enter settings for echograms to be transmitted via the serial port Range Options 1 m 250 m 5 m 500 m 10 m 1000 m 15 m 1500 m 25 m 2500 m 50 m 100...

Page 107: ...Range of bottom echogram Bot Range Start Options 100 m to 100 m in steps of 1 m This command sets the upper start depth of bottom echogram relative to detected bottom depth positive values above the b...

Page 108: ...log R This parameter controls which transmission loss compensation algorithm is to be used TVG Time Vari able Gain 20 log R is selected for echogram presentation of volume backscattering strength and...

Page 109: ...s can be generated from the menu just by entering the current event counter value An event results in a red vertical line across the echo gram on display and printer if the event marker parameter in t...

Page 110: ...Operation 76 P3402 C Text Selecting this entry results in a cursor for start of input of text Maximum length of text string is 80 characters Input is terminated by pressing the ENTER key...

Page 111: ...ition of the first field and the number of fields to be included in the navigation data substring In the start sequence up to 6 start characters may be defined However if there is no trouble with ambi...

Page 112: ...s OFF SERIAL To select the source of navigation input OFF disables input of navigation telegrams Start Sequence Options 0020h to 007Fh First characters of telegram Up to 6 characters to be set in a se...

Page 113: ...ial port or set manually see Manual Speed Manual Speed Options 0 0 to 25 0 knots in steps of 1 knot To set manual speed If Log Menu Log Mode is set to SPEED the Manual Speed should be set to a number...

Page 114: ...Operation 80 P3402 C Stop Bits Options 1 2 Number of stop bits navigation port Parity Options NONE ODD EVEN Type of parity navigation port...

Page 115: ...x0 NUL DLE space 0 P p x1 SOH DC1 1 A Q a q x2 STX DC2 2 B R b r x3 ETX DC3 3 C S c s x4 EOT DC4 4 D T d t x5 ENQ NAC 5 E U e u x6 ACK SYNC 6 F V f v x7 BEL ETB 7 G W g w x8 BS CAN 8 H X h x x9 HT EM...

Page 116: ...ike Beeper ON OFF Default settings YES NO etc Beeper Options OFF ON Beeper ON OFF The beeper outputs short sound signals for status messages warnings and long tones for alarms Status Messages Options...

Page 117: ...tions NO YES Simrad default settings are entered for all parameters when specifying YES Language Options ENGLISH FRENCH GERMAN NORW To choose between English French German or Norwegian menu texts Soun...

Page 118: ...Operation 84 P3402 C COM1 COM2 Switch Options OFF ON If OFF is selected COM1 navigation input COM2 remote control telegrams If ON is selected COM1 remote control telegrams COM2 navigation input...

Page 119: ...ions OFF ON When Message is set to ON a test message will be transmitted to the serial communication port COM1 Example phase amplitude athwarts depth 9 9 9 XX1 110 5 12 20 120 3 167 5 dummy dummy 8 8...

Page 120: ...e data Start of sample data is referred to the current super layer The layout is very similar to SCOPE on the printer described in paragraph 2 5 1 The first parameter to be set is the dynamic range fo...

Page 121: ...3E A 1 THEORY OF OPERATION P3403E 857 160020 AA062 This section contains some of the theory behind the measurements performed by the EY 500 bottom detection echogram generation echo integration and ta...

Page 122: ...Simrad EY 500 2 P3403E A Document revisions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 25 08 95 CL 25 08 95 HS 31 08 95 RB...

Page 123: ...L DESCRIPTION 5 1 2 THE TRANSCEIVER 5 1 3 THE SIGNAL PROCESSING 5 2 POWER BUDGET 5 3 EY 500 DB FORMAT 11 4 BOTTOM DETECTION 11 5 BOTTOM RANGE 12 6 ECHO INTEGRATION 12 7 SPLIT BEAM OPERATION 14 8 IMPUL...

Page 124: ...Simrad EY 500 4 P3403E A Document history The information on this page is for Simrad s internal use Rev A Original issue First edition as module Was section 4 of P2473E...

Page 125: ...ation 1 3 THE SIGNAL PROCESSING The signal processing is done by software in the PC It takes care of control of the transmitter receiver and processing of received data The software generates echogram...

Page 126: ...power constant see figure 1 Thus gain accounts for both directional properties and losses and is indepen dent of input power level impedance and observation point However gain must be referred to a d...

Page 127: ...eceiving area are related by reciprocity as shown in equation 2 where 8 is the wavelength and where A and G are both referred to the same point on the terminal side of the transducer Figure 2 shows th...

Page 128: ...ensity at the transducer target range is explained in expression 4 The real transducer amplifies the radiated signal by a factor G in the direction of the target and attenuation occurs while propagati...

Page 129: ...terms of backscattering strength rather than backscattering area and the equivalent expression for point backscattering strength becomes equation 10 where r0 1 meter is the reference range for backsc...

Page 130: ...al at a particular instant With a pulsed transmitter the volume V corresponds to a sphere of thickness cJ 2 where c is the propagation speed in water and J is the transmit pulse duration Thus the thre...

Page 131: ...B as the address in an antilog lookup table containing 256 elements and a similar technique can be used for the inverse conversion from linear to dB scale 4 BOTTOM DETECTION The bottom detection algor...

Page 132: ...nd allows the echogram relative to detected bottom to be shown with a resolution different from that of the main echogram This feature is useful when studying soft sediment layers and bottom consisten...

Page 133: ...ained by combining the four equations Calibrating the sounder for the first time with a reference target a small discrepancy will most likely be observed between the measured SA and the theoretically...

Page 134: ...nt propagating towards the transducer arrives at different times at the four quadrants causing the phase angle of the electrical output signal from the quadrants to differ The fore and aft angle is de...

Page 135: ...plit beam measurement principle only works for echoes originating from a single point target since the electrical phase will be random if echoes from multiple individuals at different positions in the...

Page 136: ...nvironment or when the targets are small the max gain compensation and TS minimum values should be carefully optimized to suit the current situation 8 IMPULSE RESPONSE The transmitted signal is charac...

Page 137: ...engine noise flow noise and other locally identifiable acoustic noise sources Basically this noise is related to vessel design and transducer instal lation and can be reduced significantly by taking t...

Page 138: ...ation and a method of showing the maximum detection depth for a specified target strength This is achieved by setting the min TS in the echogram menu equal to a specified TS in passive mode and the ec...

Page 139: ...Soc Am 70 807 12 Del Grosso 1972 J acoust Soc Am 52 1442 6 at depth 0 m 1500 1450 1400 0 5 10 WATER TEMPERATURE deg C 15 20 25 30 m s Salinity 40 Salinity 0 CD467 Figure 8 Sound velocity diagram 11 SO...

Page 140: ...Simrad EY 500 20 P3403E A...

Page 141: ...remote control P3404E A 1 DESCRIPTION OF TELEGRAMS AND REMOTE CONTROL P3404E 857 160021 AA062 This section contains information about the serial communication port of the EY 500 and descriptions of t...

Page 142: ...Simrad EY 500 2 P3404E A Document revisions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 25 08 95 CL 25 08 95 HS 31 08 95 RB...

Page 143: ...ATION PORT 5 1 1 GENERAL 5 1 2 OUTPUT TELEGRAMS 6 1 3 ASYNCHRONOUS OUTPUT TELEGRAMS 7 1 4 PING BASED OUTPUT TELEGRAMS 7 1 5 LOG BASED OUTPUT TELEGRAMS 9 1 6 INPUT TELEGRAMS 10 2 THE DISK STORAGE 11 2...

Page 144: ...Simrad EY 500 4 P3404E A Document history The information on this page is for Simrad s internal use Rev A Original issue First edition as module Was section 5 of P2473E...

Page 145: ...e serial communication port are referred to as telegrams The following information applies to all telegrams All output telegrams contain a two character header indicating the telegram type for example...

Page 146: ...Parameter enter telegrams Comment string annotation telegrams 1 2 OUTPUT TELEGRAMS Serial port output telegrams may be in either ASCII or binary format The binary format is identical to the disk teleg...

Page 147: ...that a parameter has been entered due to a manual command operation from the menu and contains header time path parameter CS reports that an annotation comment string has been entered from the keyboa...

Page 148: ...41 3 38 3 35 8 35 8 30 0 28 8 29 2 36 2 38 3 35 3 values 30 3 28 4 32 7 35 1 40 0 37 9 34 9 34 8 34 7 37 9 35 3 34 6 32 0 29 2 34 3 34 2 34 2 34 2 34 0 34 6 39 3 39 2 39 1 35 2 37 3 41 8 47 1 38 9 38...

Page 149: ...0 1 0 1 80 0 CR LF 9 B 20 0 0 0 5 0 1 80 0 CR CR LF A1 10031120 930523 CR LF 6 integrator table 31 CR LF 121 CR LF 27E 1 CR CR LF H1 10031120 930523 50 0 CR LF 6 TS distribution table 818 38 38 17 6...

Page 150: ...elegram simply consists of the path of the parameter A parameter is entered by specifying the path and the new parameter value separated by a sign Input telegrams not starting with a are taken as anno...

Page 151: ...stored in a file into an ASCII readable file for easy inspection of EY 500 data All relevant files are stored in the EY 500 directory File name Contents EY500 PAR Backup parameters of all EY 500 sett...

Page 152: ...paragraphs using C programming language structures The size of the various C types are char 8 bit integer short 16 bit integer long 32 bit integer float 32 bit floating point IEEE 754 Structure membe...

Page 153: ...Header 2 CS char Separator1 1 char Time 8 hour minute second hundredth char Separator2 1 char Text 256 comment string struct Text geographical location navigation char Header 2 GL char Separator1 1 ch...

Page 154: ...undredth char Separator2 1 long Traces number of echo traces in telegram struct float Depth target depth meter float CompTS compensated TS dB float UncompTS uncompensated TS dB float AlongShip alongsh...

Page 155: ...gic echogram array and bottom echogram array are included The Sv TS data is output in the EY 500 dB format Refer to section Theory of Operation chapter 3 EY 500 dB format struct Sample sample angle da...

Page 156: ...1 short Data 5000 max 5000 data points per data block The V1 output telegram provides volume backscattering strength sample data power sample data with 20 log r TVG added Refer to section Theory of O...

Page 157: ...parator3 2 float Distance vessel log distance nautical mile short SuperLayer super layer identifier 1 10 short Layers number of active layers struct short LayerID layer identifier 1 10 short Type S su...

Page 158: ...har Separator1 1 char Time 8 hour minute second hundredth char Separator2 1 char Date 6 year month day char Separator3 2 float MinTS lower boundary of TS range dB struct long Detections number of dete...

Page 159: ...ortable echo sounders MA1N1 ENANCE P3405E 857 160022 4AA062 This section contains information on preventive and corrective maintenance on the Simrad 500 Series portable echo sounders EY 500 and EA 50...

Page 160: ...Maintenance Document revisions Rev Documentation HardwarelSoftware ProjectJProduct department Design Management Date Sign Date Sign Date Sign 25 08 25 08 31 08 IS O3 Q 9 i oJ ft J B D qb P3405E B...

Page 161: ...T POINTS TROUBLESHOOTINGHINTS 29 3 BUILT IN TEST FUNCTIONS 30 1 Internaltest 30 2 Self test procedure for printer 4 4 FAULT FINDINGPROCEDURE 5 DISASSEMBLYIREASSEMBLY 34 INTRODUCTION 34 REMOVING THE UP...

Page 162: ...fJocumen t history The information on this page is for Simrad s internal use Rev Original issue Rev The document is expanded to cover the portable echo sounders in the Simrad 500 Series EA 501P and EY...

Page 163: ...ion given here should be able to locate and change a faulty circuit board or module but will not do the repair on the circuit board level The technical descriptions are based on block diagrams and com...

Page 164: ...Maintenance Figure Transceiver with PC...

Page 165: ...500 senes echo sounders Vlew transceiver...

Page 166: ...Maintenance Figure interconnection...

Page 167: ...ver digital transceiver combination contains transmitter receiver and AID conversion circuitry The receiver does not contain any TVG Time Varying Gain function as the echo sounder implements this func...

Page 168: ...contains circuitry to provide an interface between the transceiver boards and the PC and printer The board has 4 plugs P2 Different input output signals connected directly to the motherboard P3 Print...

Page 169: ...B TEST BEAMTYPE cntr TX 2 tif iW K W iW t J f MMw r Ji f LATCH latchstb DECODE MUX Figure TIMER SCLCK Wi i iWfl Vf J fg KM iWf fi3 data i t i JI ptrstb fifostb NWfW iWNtMMkiWlJfWMi PRINTER if RS FIFO...

Page 170: ...Maintenance Figure...

Page 171: ...k Information point AI Timer control AD Timer control CS WR Timer control TX trigger active high Spare Test test high Single split single low BW wide low 5V 13 GND 2xfrequency TX pulse Sample clock Ch...

Page 172: ...d in two FIFOs The four DC signals from the receiver envelope detectors have different amplitude levels with 30 dB steps G 1 G2 G3 and G4 STEP GAIN dB Active amplitude region 5V 158mV 5V 158mV 5V 158m...

Page 173: ...from one AID is chosen every sample AID PROM FIFO ain 0 dB AID FIFO ain 30 dB J CtS CtS C I T AID ain 60 dB AID ain 90 dB Amplitude part DO hase COUNT FIFO hase hase FIFO f hase Phase art 1125 Figure...

Page 174: ...Maintenance...

Page 175: ...echo sounders Maintenance aids Test points There are three internal test points Check point Information TP1 SMPU inverted TP2 10 Mhz TP3 GND Links 10 MHz Open 625 MHz Open 1 25 MHz Mounted 5 MHz Open...

Page 176: ...fuse in front for battery short circuit protection The TX pulse is indicated by the LED across the transformer primary located for easy viewing on the front of the board The transmitter power can be h...

Page 177: ...a1 og BUtputs from the receiver with different grades of amplification These outputs which represent the amplitude have an active area from 158m V to 5V DC except the 90 dB gain output which operates...

Page 178: ...n Rectifier Buffer Filter Summation Rectifier Buffer Filter TTL level 1 TTL level I TTL level TTL level I AMP I AMP I AMP I 30 dB I 30 dB I 30 dB I COMP _ J J AMP AMP AMP AMP Transducer 1 Transducer 2...

Page 179: ...500 series portable echo sounders Figure tra nsce i ver...

Page 180: ...is useful to establish if there is a TX pulse present Test points Internally the PCB contains a large number of test points There is one after the 30 dB gain steps for each channel one after summatio...

Page 181: ...eiver frequency Coding Clock frequency Transceiver type MHz 1 10 210kHz single 1 25 12 kHz split 1 25 18 kHz single 1 25 18 kHz split 27 kHz single 27 kHz split 38 kHz single 38 kHz split 49 kHz singl...

Page 182: ...the switching frequency away from the frequency of the receiver All of the outputs can be short circuited or left open without damaging the power supply although input fuse Fl may blow Connections Pl...

Page 183: ...500 series echo sounders power...

Page 184: ...Maintenance BACKPLANE Refer to drawing 824 109327 in section Drawings Maintenance aids Important test points TP1 TX pulse TP2 2xfo TP3 SMPL frequency TP4 GND TP5 5V P3405E B...

Page 185: ...500 series portable echo sounders...

Page 186: ...he echo sounder is very limited When required clean the surfaces of the equipment with a soft lintfree cloth and a mild detergent For information about preventive maintenance on the computer and optio...

Page 187: ...menu commands refer to section Operation 2 Check external equipment Before proceeding with troubleshooting check that equipment used with the echo sounder system is operating correctly Also check that...

Page 188: ...Menu Activate Transceiver Provided the transducer output has a 60 ohm termination the following data will be displayed AMPL ALO ATH NOISE SPL transducer 2dB 2dB Single transducer 2dB 2dB 2 Self test p...

Page 189: ...o transceiver board gram If fuse not OK Change fuse If fuse blows again Disconnect HV cable and measure resistance on pins 1 4 3 Mohms If short circuit Faulty analog transceiver board If fuse OK Check...

Page 190: ...f OK Check transducer connection and measure transducer impedance 60 ohms No reaction Faulty analog after activating transceiver board or narrow wide PC interface board bandwidth from transceiver menu...

Page 191: ...ints If wrong colours Check wrong colours colour cartridge or parts of Refer to Printer User characters are Guide If cartridge not OK Replace cartridge mIssIng If black white not OK Check black cartri...

Page 192: ...is described for reassembly carry reverse order procedures REMOVING THE UPPER COVER Simply remove the four crosshead screw and lift up the cover REPLACING THE PCB MODULES The PCB modules are from top...

Page 193: ...remove the plugs as shown in the figure upper module is to be replaced it is recommended to first pull out the module in the middle Loosen the two screws holding the module be removed and pull it out...

Page 194: ...NG THE DC POWER SUPPL Y The power supply is located behind the rear panel 1 Unscrew 8 screws on the rear panel 2 Remove all three PCB modules as described paragraph 5 3 Pull out the ribbon cable plug...

Page 195: ...d the ON OFF 5 The power supply with motherboard can be removed 6 If the motherboard and the power supply are to be separated unscrew six screws and two nuts The motherboard and power module are then...

Page 196: ...us interrupt Maxim um depth alarm 1 Bottom has been detected deeper than the maximum depth alarm setting Minim um depth alarm Bottom has been detected shallower than the minimum depth alarm setting Na...

Page 197: ...ta is directed to serial port data is lost Serial line 1 error PC COM2 failure Unknown error An unexpected software error has been detected Should be reported to Simrad Unknown remote command Invalid...

Page 198: ...sent to the control processor which will issue the error message At power up the signal processor will never start real pinging until all the parameters are granted However in order to receive new inf...

Page 199: ...equ beam angle error 100 to 1 dB SP 1 frequency error 104 to 106 Hz SP 1 layer data error See note III SP 1 not responding error See paragraph 6 SP 1 ping mode error 0 to 3 SP 1 printer 1 data error...

Page 200: ...al values Bottom echogram dots 0 to 500 Bottom range 0 to 100 m Bottom range start 100 to 100 m Echogram dots 0 to 700 Range 0 to 2500 m Range start 0 to 2500 m Sub bottom gain 0 to 5 dB m TVG 0 to 2...

Page 201: ...are outside legal limits I Parameter I Legal values Layer margin 0 to 10 Layer start 100 to 20000 Layer stop 100 to 20000 Layer type 0 to 3 3 Error messages concerning disk storage Disk error 0 File n...

Page 202: ...e Stock Transceiver Frequency Power Beam type number Analog kHz W transceiver 250 Single 382 074983 250 Split 382 073377 250 Single 382 056149 Single 382 109214 Split 382 065458 120 Single 382 074984...

Page 203: ...260 E 1 CALIBRATION OF THE EK 500 EY 500 P2260 859 043867 AA011 This document contains calibration procedures procedures to determine the beam compensation in a split beam system and procedures for no...

Page 204: ...revisions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 01 02 91 B 31 08 92 C 01 10 93 D 28 05 96 CL 29 05 96 RLN 29 05 96 RB E 20 05...

Page 205: ...EY 500 P2260 E 3 List of contents 1 THE PURPOSE OF CALIBRATION 5 2 CALIBRATION PROCEDURE 6 3 THE LOBE CALIBRATION PROGRAM 17 3 1 UNPACKING AND STARTUP 17 3 2 OPERATING PROCEDURE 18 4 NOISE MEASUREMEN...

Page 206: ...B Minor changes to the text Rev C Minor changes to the text EY 500 implemented Rev D Various changes in the procedures A chapter about the lobe calibration program is added Ref EM 10526 Rev E Some un...

Page 207: ...orrectly calibrated It is a safe practice to perform the calibration before and after the survey If experiences over time show that no adjustments are necessary it may be appropriate to reconsider the...

Page 208: ...checked Rigging The following rigging description is to a great extent reproduced from ICES report 144 The vessel should be anchored in calm and sheltered water The depth must be sufficient for separa...

Page 209: ...Simrad EK 500 EY 500 P2260 E 7 WINCH 2 WINCH 3 WINCH 1 CD481 Figure 1 Rigging of a vessel for sphere calibration...

Page 210: ...helps to eliminate air bubbles attached to the sphere Lowering the sphere Lower the sphere beneath the vessel to the desired distance for example 25 m which is determined roughly by counting the swive...

Page 211: ...h high purity The spheres are machined to the perfect spherical form with great accuracy and a nylon loop is attached Except for 12 kHz 49 kHz and 50 kHz the sphere diameter is different for each freq...

Page 212: ...0 m 1500 1450 1400 0 5 10 WATER TEMPERATURE deg C 15 20 25 30 m s Salinity 40 Salinity 0 CD467 Figure 3 Sound speed in water from FRANCOIS GARRISON JASA dec 1982 10 Degrees C 200 m depth pH 8 FREQUEN...

Page 213: ...EY 500 only uses one transceiver and one printer Select the Transceiver Menu and set Mode Active Pulse Length Medium Bandwidth Wide Transducer Depth 0 0 m Select the Operation Menu and set Ping Mode...

Page 214: ...gth 0 8 Max Echo Length 1 8 Max Gain Comp 6 0 dB Max Phase Dev 2 0 The best value for the sound velocity profile should be set in the Sound Velocity Menu in order to keep the accuracy as high as possi...

Page 215: ...S window will be zero degrees Calculate the angle by means of the information regarding the distance between the two transducers and the distance between the sphere and the transducers Refer to figure...

Page 216: ...ere is well within the super layer Select the Test Menu Scope and a dynamic range for the plot 50 dB Then select the highest amplitude value to be included in the plot 50 dB The sphere echo should now...

Page 217: ...ate a new TS transducer gain TS measured TS sphere New transd gain Old transd gain _________________________________________ 2 Select the new TS Transducer Gain in the Transceiver Menu and check that...

Page 218: ...n underneath the horizontal projection window Q equivalent 2 way beam angle from the measurement data delivered with the transducer Q 10dB value 10 4Br0 2 Fbs 1852 m nm 2 sA theory ___________________...

Page 219: ...c The C source code was compiled with a Borland Turbo C 1 01 compiler The procedure for unpacking the archive files is straightforward Insert the Simrad distribution diskette in the A drive Create an...

Page 220: ...arameters are automatically loaded into the echo sounder using the remote control commands via the RS232 connection 3 2 OPERATING PROCEDURE Connect an RS232 serial line cable between the PC and Serial...

Page 221: ...ng the present calibration In the Record Menu you have to fill in a new File Name and Transceiver Number according to the setting in the sounder if EK 500 The transceiver number is selected by means o...

Page 222: ...samples are blue grey The recorded number of Data Sets is shown When the file is completed stop collecting data by typing CR LF If the TS of unwanted objects like fish is recorded note the sample numb...

Page 223: ...be shown for 0 45 90 and 135 degrees by typing F1 F2 F3 or F4 Refer to figure 9 The final calibration data for TS Gain Beam and Offset values are calculated and shown in the Fit Menu These data shoul...

Page 224: ...Calibration 22 P2260 E Figure 8...

Page 225: ...Simrad EK 500 EY 500 P2260 E 23 Figure 9...

Page 226: ...that the water depth is 200 m or more The noise should be measured at different vessel speeds from 0 to maximum speed with steps of 2 knots The vessel s course must be kept steady during these measur...

Page 227: ...nu and set Range According to table below Range Start According to table below Frequency kHz Range Range Start 18 5000 0 38 1000 100 120 250 0 200 200 0 Auto Range Off Bot Range Pres Off Presentation...

Page 228: ...nterval and integration table for the same interval Continue the same procedure at 2 knot intervals until reaching maximum speed Use marker lines to separate the different intervals When at maximum sp...

Page 229: ...smission loss dB L Layer thickness m 10 log Q Equivalent two way beam angle dB I Transmitter pulse length msec Si Z and 10 log Q is from the data sheet for the specific transducer For split beam trans...

Page 230: ...tout has started set Presentation Normal Repeat the measurement for transceiver 2 and 3 if installed References ICES Cooperative Research Report 144 Calibration of acoustic instruments for fish densit...

Page 231: ...t menu NOISE NL from test menu Engine r p m Propeller r p m Knots m2 nm2 dB re 1 FPa dB re 1 W dB re 1 FPa 0 0 0 1 Increasing 2 2 3 Increasing 4 4 5 Increasing 6 6 7 Increasing 8 8 9 Increasing 10 10...

Page 232: ...Calibration 30 P2260 E Blank page...

Page 233: ...here dB Default TS Transducer Gain dB Measured TS dB Calibrated TS Transducer Gain dB Calibrated TS dB Default 2 Way Beam Angle dB Transducer data 2 Way Beam Angle dB Measured Distance Transducer Sphe...

Page 234: ...Calibration 32 P2260 E Blank page...

Page 235: ...500 series portable echo sounder P3406E B 1 DRAWINGS P3406E 857 160023 4AA062 This document contains the referenced drawings for maintenance of the echo sounder...

Page 236: ...406E B Document revisions Rev Documentation department Hardware Software Design Project Product Management Date Sign Date Sign Date Sign A 25 08 95 CL 25 08 95 HS 31 08 95 RB B 15 03 96 CL 18 03 96 EF...

Page 237: ...ns 824 111021 652 06 Plug connection drawing 820 134006 664 36 Interconnection diagram 824 111019 652 04 Power distribution 824 111022 652 07 Motherboard diagram 824 109327 643 32 Interface PCB circui...

Page 238: ...P3406E B Document history The information on this page is for Simrad s internal use Rev A Original issue Rev B The document is expanded to cover the portable echo sounders in the 500 Series EA 501P a...

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Page 261: ...ts binary and ASCII are described in the EY 500 Instruction Manual section Description of Telegrams and Remote Control Five telegrams are only output in binary format by the EY 500 due to their large...

Page 262: ...s raw angle sample data from the transceiver applies to split beam transducer channels only header time tag angle data points phase steps alongship angle followed by athwartships angle W1 provides raw...

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