Simrad EY500 Instruction Manual
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Simrad EY500 Instruction Manual

Portable scientific echo sounder
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  • Page 7 Simrad EY 500 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 specifications. P3400/B...
  • Page 8 System familiarization Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 25.08.95 25.08.95 31.08.95 P3400/B...
  • Page 9 Simrad EY 500 List of contents 1 INTRODUCTION ......... . .
  • Page 10 System familiarization 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 printer specifications on page 13.
  • Page 11 PC display and on an optional colour printer. A file system allows storing of selected data for further analysis by means of the Simrad EP 500 Echo Post- processing System. Sample data may also be stored on hard disk and replayed off-line for easy regeneration or demonstration of survey echo data.
  • Page 12 System familiarization 1.2 DESCRIPTION OF THE EQUIPMENT 1.2.2 Configuration The EY 500 sounder system comprises Transducer Transceiver Power supply Colour printer (option) Navigation instrument Transducer multiplexing (requires external hardware) Modem for remote control and telegrams Modem Navigation instrument Remote control HP printer Transceiver EY 500...
  • Page 13 Simrad EY 500 A range of single-beam transducers is available for different frequencies. Additionally, dedicated split-beam transducers are available for 38, 70 and 120 kHz for measuring target strength. The minimum requirements for the PC to be used with the EY 500 transceiver are listed under the Technical Specifications.
  • Page 14 System familiarization 1.2.6 Interconnections Figure 3 shows the rear panel of the EY 500 transceiver. It has the following connectors: * COMPUTER (25-pin D-conn. male) for connection to the standard parallel input on the PC. The cable should be less than 1 m and is a 1/1 connection. * PRINTER (25-pin D-conn female) for connection to the printer input.

  • Page 15: Technical Specifications

    Simrad EY 500 2 TECHNICAL SPECIFICATIONS Common specifications for single-beam and split-beam versions: Frequencies: 38, 70, 120, 200 and 710 kHz Transmitting power: 50 to 250 W, see table on next page. Range: 1, 5, 10, 25, 50, 100, 150, 250, 500, 1000, 1500...
  • Page 16 Colour printer: Echogram in 12 colours (3 dB per colour) Tables available on printer for Sa values and TS distribution in preselected layers. SIMRAD EP 500 Echo Postprocessing System: Postprocessing system developed by Lindem Data Acquisition. Calculates TS distribution from single beam data (Craigs and Forbes statistical method).
  • Page 17 Simrad EY 500 Transceiver: Supply voltage: 10 to 40 VDC Power consumption: approx. 15 W Operating temperature: 0 - 55E Transceiver parameters Frequency Beam Power Pulse duration Bandwidth (kHz) Resolu- (kHz) type (ms) tion Narrow Wide (cm) 37.878 Single 0.38 70.422...
  • Page 18 System familiarization Maximum detection range for different transducers: Type Beamwidth Cable Max. detection depth Max detection depth (degrees) length Freshwater (m) Seawater (m) fish bottom fish bottom TS = TS = TS = TS = 50 dB 50 dB 38-22 11x22 3000* 1900...
  • Page 19 Simrad EY 500 Printer specifications: PaintJet DeskJet, type 850C Paper width 210 mm 210mm Resolution 720 pixels across paper 720 pixels across paper Supply voltage 187 - 264 VAC 50/60 Hz 100-240 VAC 50/60 Hz 90 - 132 VAC 50/60 Hz...
  • Page 20 System familiarization P3400/B...
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  • Page 35 Simrad EY 500 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 descriptions of each menu. P3402/C...
  • Page 36 Operation Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 25.08.95 25.08.95 31.08.95 15.08.96 19.08.96 19.08.96 22.05.97 22.05.97 22.05.97 P3402/C...
  • Page 37 Simrad EY 500 List of contents 1 INTRODUCTION ......... . .
  • Page 38 Operation Document history (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 software version 5.20 to 5.30.
  • Page 39 Simrad EY 500 1 INTRODUCTION NOTE ! The EY 500 Instruction Manual is based on software version 5.30. Changes made in the software may require amendments in this manual. 1.1 THE INTERACTIVE MENU SYSTEM The EY 500 system is operated via the PC keyboard. Operation is based on an interactive menu system which to a large extent is self-explanatory with all operational options listed on the display.
  • Page 40 Operation Figure 1. Display layout. The printer echogram may contain all the information of the display echogram, as well as the additional elements: Nautical mile marker Annotation Date and time TS distribution tables Integration tables Navigation text Identification for range, TVG and colour sensitivity The various elements of the display and printer echograms are described in paragraphs 1.2.3 and 1.2.4.
  • Page 41 Simrad EY 500 In the Echogram Menu it is possible to set the lower limit of the colour scale relative to target strength or volume backscattering strength (the commands TS colour min. and Sv colour min.). If, for example, this limit is set to -70 dB, the weakest colour includes the target strength range -70 to -67 dB, while the strongest colour covers the range -37 to -34 dB and stronger (-70 dB + 36 dB = -34 dB).
  • Page 42 Operation The super layer sets the depth limits for controlling several different features in the system: - TS bar chart on display - TS detection window on display - Integration line on display and printer - Scope presentation. Bottom range echogram. BOT.
  • Page 43 Simrad EY 500 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 P3402/C...
  • Page 44 Operation Blank page P3402/C...
  • Page 45 Simrad EY 500 5) Event marker EVENT MARKER in the Display Menu must be turned ON. The event input may be caused by EVENT COUNTER in the Annotation Menu. The event will result in a red vertical line. Scale lines.
  • Page 46 Operation 1.2.4 Colour printer echogram The printer is able to generate more information than the display. Most elements are controlled by parameters found in the Printer Menu. The EY 500 may be interfaced to different colour printers. The graphic resolution is 720 dots with 12 different colours ranging from light grey to brown. The black colour is mainly used for text and separation lines.
  • Page 47 Simrad EY 500 Annotation. Annotations can be entered via the PC keyboard. ANNOTATION in the Printer Menu must be set to ON. The text string entered will be written across the echogram paper after the carriage return character is received.
  • Page 48 Operation The next column shows the total number of accepted single fish echoes found within each layer. These numbers will give a good indication on the database for the distribution that is given in the next 24 columns. The numbers in the distribution field is the percentage occurrence in each TS group.
  • Page 49 Simrad EY 500 Navigation data. For navigation data on the printer a connection between the navigation serial port and the navigation instrument must be established. The navigation interval must be greater than 0 in the Printer Menu. If the navigation telegram sent to the EY 500 is decoded successfully, the navigation data will be written across the echogram paper.
  • Page 50 Operation Bottom detection line. As for display echogram, 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 reference targets. An example of SCOPE presentation is shown in figure 4.
  • Page 51 Simrad EY 500 Figure 3. Colour printer echogram. 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...
  • Page 52 Operation Blank page P3402/C...
  • Page 53 Simrad EY 500 Figure 4. Scope plot showing 300 samples of transceiver data. P3402/C...
  • Page 54 Operation 1.3 OPERATION EXAMPLES The following examples describe procedures for a specific setup of the EY 500 with a limited use of its features. The procedure is outlined in a stepwise manner in order to emphasize the structured menu system in the EY 500. The following functions will be examined.
  • Page 55 Simrad EY 500 3. 20 log echogram on the printer Select the Printer Menu. Set the printer’s MODEL TYPE if the current setting is wrong. Set ECHOGRAM to ON Set INTEGRATOR TABLES to ON. Select the PRINTER/Echogram Menu. Set TVG to 20 log R.
  • Page 56 Operation 6. Limiting the bottom detection range The bottom detector algorithm uses the minimum and maximum depth settings to limit the range of interest for finding the real bottom. Very often the default values will not correspond with the presumed depth pattern in the area of surveying.
  • Page 57 "Description of Telegrams and Remote Control". Parameter settings may be saved by using the DOS command COPY to save the backup file EY500.PAR with another name, and when these settings are wanted, the same command in reverse order will bring the stored parameters back into use.
  • Page 58 Operation 1.5 THE REPLAY FUNCTION The replay function represents a major enhancement in the EY 500 system. The sample data read from the transceiver may be stored in real time on disk. These sample telegrams include information regarding the following parameters: - Frequency - Single/split system - Transducer type...
  • Page 59 Simrad EY 500 - Select the Operation Menu and set Ping Mode to Replay. The replay function may also be used to restore the following survey information: - Time - Annotation - Navigation - Vessel speed pulses It is important that the telegrams above are turned on when logging data.
  • Page 60 Operation 2 MENU DESCRIPTIONS 2.1 THE MAIN MENU The main menu is the top level of the menu 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...
  • Page 61 REPLAY, the file selected in the Disk Menu will be replayed. EXT. TRIG provides synchronization with other equipment. This operation requires special hardware supplied by Simrad. Refer to drawing Ext. sync. cable plan in section 7 in this manual. Ping Auto Start...
  • Page 62 Operation Ping Interval Options: 0.0 to 20.0 in steps of 0.1 second A fixed ping interval can be set. If the echo sounder is unable to ping as fast as the selected ping interval, a warning will be given, and the ping will be delayed one or more ping intervals.
  • Page 63 Simrad EY 500 2.3 THE DISPLAY MENU Display Menu Colour Set Light Event Marker Echogram Speed Echogram Echogram Menu The Display Menu is used to choose between different display modes, to introduce an event marker on the display, to choose the desired speed of the echogram movement across the screen and for switching the echogram presentation on and off.
  • Page 64 Operation Echogram speed Options: 1:10 With setting 1:1 every ping 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 the other output devices.
  • Page 65 Simrad EY 500 2.3.1 The Display/Echogram Menu DISPLAY/Echogram Menu Transd. Number Range 100 m Range Start Auto Range Bottom Range 10 m Bot. Range Start Bot. Range Pres. Sub. Bottom Gain 0.0 dB/m Presentation Normal 20 log R Scale Lines Bot.
  • Page 66 Operation Range Options: 500 m 750 m 10 m 1000 m 15 m 1500 m 25 m 2500 m 50 m 100 m 150 m 250 m Depth range across echogram. Range Start Options: 0 to 2500 meters in steps of 1 m Upper start depth of echogram.
  • Page 67 Simrad EY 500 Bot. Range Pres. Options: UPPER BOTTOM LOWER While a normal echogram is referred to the surface, the bottom echogram is always referred to the bottom. The Bottom Range Presentation command allows you to position this echogram at different places in the echogram area.
  • Page 68 Operation Options: 20 log R 40 log R This parameter controls 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 target strength. Scale Lines Options: 0 to 250 lines in steps of 1...
  • Page 69 Simrad EY 500 Integration Line Options: 1000 10000 100000 1000000 The echo integration buildup within the super layer is plotted as a deflection line. The numeric setting determines the vertical range across the echogram in units m²/nm². Refer paragraph ECHO INTEGRATION in section "Theory of Operation".
  • Page 70 Operation 2.4 THE PRINTER MENU Printer Menu Model Type PaintJet Navig. Interval Event Marker Annotation Naut. Mile Marker TS Distribution Integr. Tables Echogram Speed Echogram Echogram Menu The Printer Menu is used to choose the desired presentation of echogram and data on the printer printout.
  • Page 71 Simrad EY 500 Event Marker Options: When ON, a vertical line is drawn across the echogram each time an "event" occurs. The event number is printed on top of the paper. Refer to the Annotation Menu description for information about how to generate events.
  • Page 72 Operation 1:10 With setting 1:1 every ping is displayed. With setting 1:2 every second ping is displayed, with setting 1:3 every third ping is displayed, etc. This in order to get a more compact history on the echogram or to increase the ping rate.
  • Page 73 Simrad EY 500 2.4.1 The Printer/Echogram Menu PRINTER/Echogram Menu Transd. Number Range 100 m Range Start Auto Range Bottom Range 10 m Bot. Range Start Bot. Range Pres. Sub. Bottom Gain 0.0 dB/m Presentation Normal 20 log R Scale Lines Bot.
  • Page 74 Operation 2.5 THE TRANSCEIVER MENU Transceiver Menu 38 kHz Mode Active Transducer Type ES38B Transd. Sequence Transducer Depth 0.00 m Absorption Coef. 10 dBkm Pulse Length Medium Bandwidth Auto Max. Power 125 W 2-Way Beam Angle -20.6 dB Sv Transd. Gain 26.50 dB TS Transd.
  • Page 75 Transd. Sequence Options: This operation requires special hardware supplied by Simrad. Up to 32 transducers can be used in a multi- plexing scheme. The procedure for Transd. Sequence is: 1. Set Transd. Sequence to ON...
  • Page 76 Operation 1 to 32. State will enable the transducer for sequencing if ON and disable the transducer if OFF. No. of Ping is set to the number of pings before moving to the next transducer in the sequence. Transducer Depth may be set for each transducer according to the physical system setup.
  • Page 77 Simrad EY 500 Pulse Length Options: SHORT MEDIUM LONG You may select between three different pulse lengths (pulse durations). A short pulse length gives a better vertical resolution while a long pulse length is used to increase the detection range.
  • Page 78 Operation Max. Power Options: 0 to 10,000 W in steps of 1 W Transmit power referred to the transducer terminals. This setting only affects the value for Pt used in the computations, not the actual power going out. Refer to paragraph POWER BUDGET in the section "Theory of Operation".
  • Page 79 Simrad EY 500 Angle Sens. Options: Along 0.0 to 100.0 in steps of 0.1. Angle sensitivity in the fore-and-aft 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".
  • Page 80 Operation Alongship Offset Options: -9.99 to +9.99 degrees in steps of 0.1 degree. Mechanical offset 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 angle in the athwartships direction.
  • Page 81 Simrad EY 500 2.6 THE BOTTOM DETECTION MENU Bottom Detection Menu Minimum Depth 0.0 m Maximum Depth Min. Depth Alarm 0.0 m Max. Depth Alarm Bottom Lost Al. Minimum Level -50 dB The Bottom Detection Menu contains choices for setting up the range of the bottom detection algorithm and minimum and maximum depth.
  • Page 82 Operation Maximum Depth Options: 0 to 5,000 m in steps of 1 m Maximum depth for the bottom detection algorithm. The default value depends on the transducer installed. A depth setting of 0 m disables the bottom detection algorithm. See Minimum Depth description above. Min.
  • Page 83 Simrad EY 500 2.7 THE LOG MENU Log Menu Mode Ping Interval Time Interval 60 sec Dist. Interval 1.0 nm Distance The purpose of the Log Menu is to set the intervals between each final calculation of Sa and TS values. The intervals can be based on pings, time or distance.
  • Page 84 Operation Ping Interval Options: 10 to 10000 in steps of 1 The averaging interval (along the path travelled by the vessel) used by the statistical algorithms are entered in units of number of pings. Time Interval Options: 10 to 3600 seconds in steps of 1 second The averaging interval (along the path travelled by the vessel) used by the statistical algorithms are entered in units of seconds.
  • Page 85 Simrad EY 500 2.8 THE LAYER MENU Layer Menu Super Layer Layer-1 Menu Layer-2 Menu Layer-3 Menu Layer-4 Menu Layer-6 Menu Layer-7 Menu Layer-8 Menu Layer-9 Menu Layer-10 Menu Much of the processing of the EY 500 is related to layers in the water volume.
  • Page 86 Operation Super Layer Options: 0 to 10 in steps of 1 The super layer status is attached to one of the ten layers. 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 is shown with red layer lines on the...
  • Page 87 Simrad EY 500 2.8.1 The Layer Submenus Layer-x Menu Type Range 50.0 m Range Start Margin 1.0 m Sv Threshold -80 dB Default range start value depends on layer number. For description of layers, refer to description in the previous paragraph.
  • Page 88 Operation Range Start Options: -10.0 to +9999.9 m in steps of 0.1 m. The upper depth limit of the layer is either referred to the sea surface (positive values below the surface) or to the detected bottom (positive values above the bottom). Margin Options: 0.0 to 10.0 m in steps of 0.1 m.
  • Page 89 Simrad EY 500 2.9 THE TS DETECTION MENU Single fish detections inside the super layer are 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 TS Colour Min.
  • Page 90 Operation 2.9.1 The TS Detection Submenu TS-Detection Min. Value -50 dB Min. Echo Length Max. Echo Length Max. Gain Comp. 4.0 dB Max. Phase Dev. Refer to paragraph SPLIT BEAM OPERATION in section "Theory of Operation". Single fish detections inside the super layer are displayed in a fish behaviour window.
  • Page 91 Simrad EY 500 Min. Value Options: -100 to 0 dB in steps of 1 dB. The threshold value for single echo detections. Also lower boundary for the computation of TS distribution classes in the TS tables. Min. Echo Length Options: 0.0 to 10.0 in steps of 0.1.
  • Page 92 Operation Max. Phase Dev Options: 0.0 to 10.0 in steps of 0.1. Average electrical phase jitter between samples inside an echo pulse must 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 isolating echoes from single fish.
  • Page 93 Simrad EY 500 2.10 THE DISK MENU Disk Menu Max File Size 10 Mb Drive Directory \EY500 Replay File Name Replay Forever Telegram Menu Echogram Menu The Disk Menu is used to turn the logging to disk ON/OFF, to choose maximum file size, disk drive, the directory path, the name of the file to be replayed, and to select the Telegram Menu and the Echogram Menu.
  • Page 94 Operation 50 Mb 100 Mb Refer to description under Log (above). Drive Options: A through Z To select the drive to be used for logging or replaying. Directory Options: To select the directory path to be used for logging or replaying.
  • Page 95 Simrad EY 500 2.10.1 The Disk/Telegram Menu DISK/Telegram Menu Sample Range Status Parameter Annotation Navigation Depth Echogram Echo-Trace Sample Angle Sample Power Sample Sv Sample TS Vessel-Log Layer Integrator TS Distribution The DISK/Telegram Menu is used to select which data is to be sent to the disk.
  • Page 96 Operation Telegram type Iden- Recom- Recom- Contents tifier mended mended for EP 500 replay Sample Range Max. range for collecting sample data. Status Error, warning or alarm message Parameter Parameter enter or parameter request output telegram Annotation Annotation output telegram. Navigation Navigation output telegram Depth...
  • Page 97 Simrad EY 500 2.10.2 The Disk/Echogram Menu DISK/Echogram Menu Range 100 m Range Start Auto Range Bottom Range 15 m Bot. Range Start 10 m No. of Main Val. No. of Bot. Val. 20 log R The DISK/Echogram Menu is used to set up the echogram to be sent as a telegram to the hard disk.
  • Page 98 Operation Auto Range Options: Automatic adjustment of Range Start aimed at maintaining the bottom echo inside the echogram. Auto Range ON implies that the Range Start value has no significance. Bottom Range Options: 0 to 100 m in steps of 1 m. Range of bottom echogram.
  • Page 99 Simrad EY 500 Options: 20 log R 40 log R This parameter controls 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 target strength.
  • Page 100 Operation 2.11 THE SERIAL COMMUNICATION MENU SERIAL COM. MENU Telegram Menu USART Menu Echogram Menu This menu is used for 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.
  • Page 101 Simrad EY 500 2.11.1 The SERIAL/Telegram Menu SERIAL/Telegram Menu Format Binary Modem Control Remote Control Status Parameter Annotation Navigation Depth Depth NMEA Echogram Echo-Trace Vessel-Log Layer Integrator TS Distribution This menu basically controls the composition of output data telegrams on the serial port.
  • Page 102 Operation Modem Control Options: To enable modem data transfer. When Modem Control is ON, a command string for enabling of "auto answer mode" is sent. This enables the echo sounder to be called remotely and for data to be transferred through the telephone network. Remote Control Options: Ignore or interpret input telegrams.
  • Page 103 Simrad EY 500 Navigation Options: Navigation output telegram. Depth Options: Detected depth output telegram. Depth NMEA Options: Detected depth output NMEA telegram. Echogram Options: 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 Operation Vessel-Log Options: Output telegram reporting that a simulated log pulse has been detected. Typically, there are 200 pulses per nautical mile generated in simulated vessel speed. Layer Options: Output telegram containing the layer parameter settings every averaging interval. Integrator Options: Output telegram containing echo integration results for every averaging interval.
  • Page 105 Simrad EY 500 2.11.2 The SERIAL/USART Menu SERIAL/USART Menu Baudrate 9600 Bits Per Char. Stop Bits Parity None This menu is used to set up baudrate, bits per character, number of stop bits and parity for serial telegrams. Baudrate Options:...
  • Page 106 Operation 2.11.3 The SERIAL/Echogram Menu SERIAL/Echogram Menu Range 100 m Range Start Auto Range Bottom Range 15 m Bot. Range Start 10 m No. of Main Val. No. of Bot. Val. 20 log R This menu is used to enter settings for echograms to be transmitted via the serial port.
  • Page 107 Simrad EY 500 Auto Range Options: Automatic adjustment of Range Start aimed at maintaining the bottom echo inside the echogram. Auto Range implies that the Range Start value has no significance. Bottom Range Options: 0 to 100 m in 1 m steps.
  • Page 108 Operation Options: 20 log R 40 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 40 log R for presentation of target strength.
  • Page 109 Simrad EY 500 2.12 THE ANNOTATION MENU Annotation Menu Event Counter Counter Mode Increase Time Interval 0 min Text The Annotation Menu contains the possibilities of entering event count numbers, choosing the time between date/time annotations and inserting text to be stored and/or printed.
  • Page 110 Operation 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. P3402/C...
  • Page 111 Simrad EY 500 2.13 THE NAVIGATION MENU Navigation Menu Navig. Input SERIAL Start Sequence $GPGLL Separation Char. 002C Stop Character 000D First Field No. No. of Fields Speed Input Manual Manual Speed 10.0 knt Baudrate 4800 Bits Per Char. Stop Bits...
  • Page 112 Operation The navigation port default may be configured for different baudrates and communication protocols. It is possible to switch between COM1 and COM2 using the COM1/COM2 Switch in the Utility Menu. Refer to the end of this paragraph for a table showing ASCII characters versus hexadecimal representation Navig.
  • Page 113 Simrad EY 500 No. of Fields Options: 1 to 100 in steps of 1. Number of fields to be included in navigation data substring. Speed Input Options: MANUAL SERIAL The speed input may be received via the serial port or set manually (see Manual Speed).
  • Page 114 Operation Stop Bits Options: Number of stop bits (navigation port). Parity Options: NONE EVEN Type of parity (navigation port). P3402/C...
  • Page 115 Simrad EY 500 ASCII CHARACTERS VERSUS HEXADECIMAL REPRESENTATION  4 space " SYNC & ’ < > P3402/C...
  • Page 116 Operation 2.14 THE UTILITY MENU Utility Menu Beeper Status Messages Date yy.mm.dd Time hh.mm.ss External Clock Password Default Setting Language English Sound Velocity 1500 m/s COM1/COM2 Switch The Utility Menu contains different commands, like Beeper ON/OFF, Default settings YES/NO etc. Beeper Options: Beeper ON/OFF.
  • Page 117 A password number in the range 0 to 9999 can be entered. The menu system is blocked until the selected password is re-entered. Default Settings Options: Simrad default settings are entered for all parameters when specifying YES. Language Options: ENGLISH...
  • Page 118 Operation COM1/COM2 Switch Options: If OFF is selected: COM1 = navigation input COM2 = remote control/telegrams If ON is selected: COM1 = remote control/telegrams COM2 = navigation input P3402/C...
  • Page 119 The Test Menu is used for checking the receiver response, to display the current version of the EY 500 software, and to display amplitude and phase data of a single ping. The final menu entry is for Simrad personnel only. Message...
  • Page 120 Serial Port This menu entry is used to test the serial line communication for COM1 and COM2. The last input and output bytes detected by the interface are shown. Simrad Simrad use only. P3402/C...

  • Page 121: Theory Of Operation

    Theory of operation 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 target strength statistics. P3403E/A...
  • Page 122 Simrad EY 500 Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 25.08.95 25.08.95 31.08.95 P3403E/A...

  • Page 123: Table Of Contents

    Theory of operation List of contents 1 INTRODUCTION ......... . . 1.1 GENERAL DESCRIPTION .
  • Page 124 Simrad EY 500 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. P3403E/A...

  • Page 125: Power Budget

    Theory of operation 1 INTRODUCTION 1.1 GENERAL DESCRIPTION The EY 500 system performs bottom detection, echogram generation and echo integration, and for split-beam systems also target strength statistics are estimated. This section gives some theory behind this performance. 1.2 THE TRANSCEIVER The transceiver contains transmitter, receiver and A/D-conversion circuitry.
  • Page 126 Simrad EY 500 algorithms of the EY 500 uses the more modern concept of gain in order to facilitate power budget equations. The gain concept is used widely within many fields in physics and is accepted internationally as a convenient measure of the radiation properties.
  • Page 127 Theory of operation Gain and effective receiving 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 the gain pattern of a typical transducer.
  • Page 128 Simrad EY 500 where and P are the received and transmitted power referred to the transducer terminals. is the transducer gain towards the target. is the transducer target range. " is the attenuation constant. is the effective backscattering cross-section area of the target.
  • Page 129 Theory of operation & U & U Received power at the transducer terminals is obtained by multiplying this power density by the effective receiving area of the transducer, and the complete equation becomes: & U & U * (8) Rearranging the terms a simple expression is obtained for calculating the echo properties of the target (equation 9): In hydroacoustics it is common to state the echo properties in terms of backscattering strength rather than backscattering area, and the equivalent...
  • Page 130 Simrad EY 500 Having established the basic power budget equation for point backscattering, the extension to volume backscattering is straightforward. Whereas scattering from a small object is characterized by its backscattering area, the scattering from a homogeneous volume is characterized by the backscattering area per unit of water volume,MF/MV.

  • Page 131: Ey 500 Db Format

    Theory of operation 3 EY 500 DB FORMAT Simple conversion between dB and linear scale is obtained in a computer by using 10 dB x log(2) = 3.0103··· dB as a reference value in the dB domain. The EY 500 algorithms use 16-bit words to represent dB quantities. XXXXXXXX XXXXXXXX The eight most significant bits (A) correspond to the integer part relative 3.0103···...
  • Page 132 Simrad EY 500 individual tracking of several potential bottoms simultaneously. For example, bottom return number one could be from a large school of fish, return two from the true bottom, and return three could be the echo which has travelled twice up and down between the surface and the bottom.
  • Page 133 Theory of operation The first equation converts volume backscattering strength to backscattering area per unit of volume. The corresponding backscattering area per unit of horizontal area is obtained by integrating over the layer vertically, r to r . The output parameter from the integrator each averaging interval F represents the mean backscattering area per unit of horizontal area and is obtained by averaging the individual MF/MA’s over one interval.

  • Page 134: Split-Beam Operation

    Simrad EY 500 7 SPLIT-BEAM OPERATION Observation of fish with the EY 500 is based on echo integration for assessment of the total biomass and the split-beam technique for assessment of the size distribution of individuals. Thus, the split-beam feature represents a valuable supplement to echo integration.
  • Page 135 Theory of operation Thus, determining fish size from received echo strength alone will not be successful. However, knowing the beam pattern of the transducer and the position of the fish within the beam it is possible to correct for the differences in transducer gain and thereby obtaining the true target strength of the fish.

  • Page 136: Impulse Response

    Simrad EY 500 * The normalized echo length must be less than the max echo length parameter (default 1.8). * The correction value returned by the gain correction model must not exceed the max gain compensation parameter (default 4 dB). Narrow beamwidth for small targets is obtained by using smaller max.
  • Page 137 Theory of operation It should be observed that both absolute accuracy and, more important, consistency between TS and echo integration quantities are improved by including these corrections. 9 NOISE The deep water performance of a sounder is determined by the system noise level;...

  • Page 138: Absorption Coefficient

    Simrad EY 500 The EY 500 provides a unique possibility for checking the noise level of the total installation, 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 echogram range long enough to show when the noise begins to be displayed.

  • Page 139: Sound Velocity

    Theory of operation 11 SOUND VELOCITY Figure 8 is a diagram showing the sound velocity for different salinities and temperatures. Simrad sept. 1992 1550 SOUND SPEED IN SEA WATER at depth 0 m 1500 1450 1400 WATER TEMPERATURE (deg. C) (CD467) Figure 8 Sound velocity diagram.
  • Page 140 Simrad EY 500 P3403E/A...
  • Page 141 Description of telegrams and remote control 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 the different telegram types. P3404E/A...
  • Page 142 Simrad EY 500 Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 25.08.95 25.08.95 31.08.95 P3404E/A...
  • Page 143 Description of telegrams and remote control List of contents 1 SERIAL COMMUNICATION PORT ......1.1 GENERAL .
  • Page 144 Simrad EY 500 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. P3404E/A...
  • Page 145 Description of telegrams and remote control 1 SERIAL COMMUNICATION PORT 1.1 GENERAL The serial communication port on the EY 500 (default COM2) is of type RS232. Communication parameters such as baud rate, bits per character etc. can be programmed from the Serial/USART Menu. The port may be connected to an external computer, a terminal, a printer, a modem or any devices that can receive or transmit RS232 ASCII data.
  • Page 146 Simrad EY 500 The * character may be used as a wildcard in the input telegrams. The path string above would then look like: /DISP*/E*U/TV* - Input telegrams use a single carriage return as telegram terminator. <CR> - The input telegram interpreter is insensitive to upper/lower case letters.
  • Page 147 Description of telegrams and remote control 1.3 ASYNCHRONOUS OUTPUT TELEGRAMS Examples of asynchronous output telegrams: 6 parameter request PR,10024310,/OPERATION MENU/Ping Mode=Normal <CR><CR><LF> 6 parameter enter PE,10024720,/OPERATION MENU/Ping Interval=1.3 sec <CR><CR><LF> 6 comment string CS,10031140,TS measurements near Greenland <CR><CR><LF> (annotation) 6 navigation data GL,10031520,4728.31,N,12254.25,W <CR><CR><LF>...
  • Page 148 Simrad EY 500 DEPTH MAIN MAIN ECHO- BOTTOM BOTTOM BOTTOM ECHO- RANGE RANGE GRAM RANGE RANGE ECHO- GRAM START STOP VALUES START STOP GRAM DATA VALUES (in dB) Q1,11360180,0, 29.65, 0.0, 100.0,250, 10.0, -5.0, 75, -2.1, -1.9, -48.5, -82.8, -87.7, -98.7, -99.1, -99.3, -98.9, -96.5, -95.9, -94.2, -91.9, -92.6, -95.0, -94.7, -84.3, -84.7, -83.3, -81.9,...
  • Page 149 Description of telegrams and remote control contains the mean S per ping inside each active main layer and the effective thickness of the layer: header, time tag, number of active layers, layer number, mean S [dB], effective thickness [meter] etc. Note that S values smaller than -99.9 dB causes $$$.$ to be printed.
  • Page 150 Simrad EY 500 is output every log interval and contains the TS distribution within each layer: header, time tag, date, lower boundary of TS range [dB], total number of single echo detections within first active main layer, 24 fields containing detections within each TS class (percentage of relative total number of detections), total number of single echo detections within second active main layer etc.
  • Page 151 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 settings. (Refer to chapter "The EY 500 file system" in section "Operation"). MoDaHoMi.DGY Data files containing telegrams.
  • Page 152 Simrad EY 500 - B1 sample angle data - W1 sample power data - V1 sample S data - P1 sample TS data The disk storage is basically the binary type of telegrams. The main changes made moving from ASCII to binary telegram format are: - Numeric quantities are represented by the appropriate binary type, and text strings remain unchanged.
  • Page 153 Description of telegrams and remote control struct Text { /* parameter enter */ char Header[2]; /* "PE" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ char Text[256]; /* parameter path and value */ struct Text { /* comment string (annotation) */ char Header[2];...
  • Page 154 Simrad EY 500 2.3 PING BASED OUTPUT struct Depth { /* detected bottom depth */ char Header[2]; /* "D1" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ float Depth;...
  • Page 155 Description of telegrams and remote control struct Echogram { /* echogram (post processor) */ char Header[2]; /* "Q1" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ long TVGType; /* TVG type: */ float Depth;...
  • Page 156 Simrad EY 500 struct Sample { /* sample power data */ char Header[2]; /* "W1" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ short Data[5000]; /* max 5000 data points per data block*/ The W1 output telegram provides echo amplitude sample data from the transceiver;...
  • Page 157 Description of telegrams and remote control 2.4 LOG BASED OUTPUT struct VesselLog { /* vessel log */ char Header[2]; /* "VL" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ char Date[6];...
  • Page 158 Simrad EY 500 struct TableTS { /* TS distribution table */ char Header[2]; /* "H1" */ char Separator1[1]; /* "," */ char Time[8]; /* hour, minute, second, hundredth */ char Separator2[1]; /* "," */ char Date[6]; /* year, month, day */ char Separator3[2];...
  • Page 203 Simrad EK 500 / EY 500 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 noise measurements at sea.
  • Page 204 Calibration Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 01.02.91 31.08.92 01.10.93 28.05.96 29.05.96 29.05.96 20.05.97 20.05.97 20.05.97 P2260/E...

  • Page 205: Table Of Contents

    Simrad EK 500 / EY 500 List of contents 1 THE PURPOSE OF CALIBRATION ......5 2 CALIBRATION PROCEDURE .
  • Page 206 Calibration Document history (The information on this page is for Simrad’s internal use) Revisions: Rev. A Original issue Rev. 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.

  • Page 207: The Purpose Of Calibration

    If other settings are to be used during the survey, the calibration should be repeated for these. A lobe program which can be supplied from Simrad makes the TS gain calibration procedure a relatively uncomplicated task by using an extra PC connected to serial line 1 in a split-beam system.

  • Page 208: Calibration Procedure

    Calibration 2 CALIBRATION PROCEDURE Check the hardware installation Check that the transducer cable is connected to the correct transducer plug on the rear side of the EK 500 / EY 500. Check the internal test oscillator Select the Transceiver Menu and set Mode to Test. Select the Operation Menu and set Ping Mode to Normal and Noise Margin to 0 dB.
  • Page 209 Simrad EK 500 / EY 500 WINCH 1 WINCH 3 WINCH 2 (CD481) Figure 1 Rigging of a vessel for sphere calibration. P2260/E...
  • Page 210 Calibration The purpose of the swivels is threefold: - to unravel rotation of the nylon line - to mark distances on the line - to add weight so that the line sinks in water Attaching the sphere Prior to commencing the sphere measurements, a rope should be drawn beneath the hull from the first winch to the second and third winch before anchoring.
  • Page 211 Simrad EK 500 / EY 500 Reference target. Simrad supplies copper spheres designed as reference targets for the calibration of scientific sounders. Copper is selected because it is a metal which can be made electrolytically with high purity. The spheres are machined to the perfect spherical form with great accuracy, and a nylon loop is attached.
  • Page 212 Calibration Simrad sept. 1992 1550 SOUND SPEED IN SEA WATER at depth 0 m 1500 1450 1400 WATER TEMPERATURE (deg. C) (CD467) Figure 3 Sound speed in water. SIMRAD sept. 1990 from FRANCOIS & GARRISON JASA dec. 1982 10 Degrees C...
  • Page 213 Simrad EK 500 / EY 500 Centering of split beam The purpose of this operation is to move the immersed, suspended sphere onto the acoustic axis of the transducer. First the echo sounder must be set so that the echo from the sphere is visible on the display.
  • Page 214 Calibration Select the Layer Menu/Layer-1 Menu and set Type: Surface Range: The layer must be wide enough to cover Range Start:@ the sphere echo during the movements in the centering operation. Otherwise it should be as narrow as possible, in order to exclude dis- turbing fish echoes.
  • Page 215 Simrad EK 500 / EY 500 Centering of single beam In a single beam system there are different methods to position the sphere in the centre of the beam. In this system the reference sphere, when detected as a single target, will always appear in the beam centre. Use the TS detection window to observe the TS value and adjust the position of the reference sphere for maximum TS value.
  • Page 216 Calibration Single beam Split beam transducer transducer Minimum distance µ The sphere after The sphere in the being moved to centre of the the centre of the split beam single beam (CD3144) Figure 5 The Scope mode may be useful during this process as well. The scope plot starts at the beginning of the super layer, and the horizontal axis contains 200 depth samples.
  • Page 217 Simrad EK 500 / EY 500 - transmitter pulse - upper layer limit (red line) - sphere echo - lower layer limit (red line) - echo from the additional weight (if used) - bottom echo all well separated, and no other echoes within the layer limits.
  • Page 218 Calibration Check the cable connection to colour printer-1. Switch on colour-printer-1. Select the Printer1 Menu and set Integrator Tables: Number of the transceiver in use (if EK 500) Echogram: Slave The echogram recording will then be similar to the one at the display. Read the measured s -value, the red number in the integrator table after each log interval.

  • Page 219: The Lobe Calibration Program

    (8087/80287/80387) installed in the computer to speed up the estimation and plotting algorithms. This software is distributed free of charge to all Simrad EK 500/EY 500 customers. A self-extracting archive contains - C source code files...
  • Page 220 Calibration F3. To record the reference target detections from the EK 500/EY 500 into a measurement data file. Horizontal hit position and vertical target depth are displayed. A simulation mode is available for demonstration and training purposes by starting the lobe calibration program with an option parameter lobe.exe -s F4.
  • Page 221 Simrad EK 500 / EY 500 Figure 6 Type F3. The display will show previously saved calibration files. The cursor will appear at the end of the comment file on top of the display. Erase the comment string and enter your comments concerning the present calibration.
  • Page 222 Calibration The LOBE program will set up "windows" around TS value and Depth. The TS window is ±4 dB and the Depth window is ±10%. TS samples outside the windows will be rejected. When starting the calibration, check that the measured TS value is well within the window.
  • Page 223 Simrad EK 500 / EY 500 In the Fit Menu the rms deviation between calculated beam pattern and the collected data sets will be given as well as the minimum and maximum deviation and where these data sets are recorded in the file. The max. and min.
  • Page 224 Calibration Figure 8 P2260/E...
  • Page 225 Simrad EK 500 / EY 500 Figure 9 P2260/E...

  • Page 226: Noise Measurements At Sea

    Calibration 4 NOISE MEASUREMENTS AT SEA The final result of the noise measurements should be a plot of the acoustic noise in front of the transducer versus vessel speed. This plot may be compared with similar plots for other transducers on the same vessel, or plots from other vessels, and may thus serve as an evaluation of the transducer location and the vessel noise radiation.
  • Page 227 Simrad EK 500 / EY 500 Select the Log Menu and set: Mode: Ping Ping Interval: Select the Display Menu and set: Echogram Speed: 1:1 Echogram: Select the Display Menu/Echogram-1 Menu and set: Range: According to table below Range Start:...
  • Page 228 Calibration Select the Layer Menu/Layer-1 Menu and set: Type: Pelagic Range (layer thickness L) See table below Range Upper: See table below Sv Threshold -100 dB No. of Sublayers: Frequency Range L Range Start 3975 147,5 59,5 Range settings and transmission loss for different frequencies Start the noise - speed trial with the vessel in a fixed position.
  • Page 229 Simrad EK 500 / EY 500 When the trial has been completed, the corresponding noise level, NL dB re 1 FPa can be calculated for both the recording procedures. The results from the two procedures might differ somewhat because of the different ways they are measured.
  • Page 230 Improved calibration of hydroacoustic equipment with copper spheres. By Foote, Knudsen, Vestnes, Institute of Marine Research, Bergen and Brede, Nielsen, Simrad Subsea Horten, Norway. Journal of the Acoustical Society of America, March 1983. Maintaining precision calibrations with optimal copper spheres By Ken Foote.
  • Page 231 Simrad EK 500 / EY 500 Ref. Revolutions Propeller Vessel Measured NL from Test menu NL from pitch speed NOISE test menu Engine Propeller dB re. dB re. dB re. 1 FPa 1 FPa r.p.m. r.p.m. Knots Increasing Increasing Increasing...
  • Page 232 Calibration Blank page P2260/E...
  • Page 233 Simrad EK 500 / EY 500 CALIBRATION REPORT EK 500 / EY 500 VESSEL:..............DATE:................ PLACE:..............EK/EY 500 SERIAL NO:......... TRANSDUCER TYPE:......SERIAL NO.:....FREQUENCY:....KHZ WATER TEMP:....EC SALINITY:....% SOUND VELOCITY:....M/SEC. Ping Interval sec. Absorption Coefficient dB//km Pulse Length SHORT...
  • Page 234 Calibration Blank page P2260/E...
  • Page 235 500 series portable echo sounder DRAWINGS P3406E / 857-160023 / 4AA062 This document contains the referenced drawings for maintenance of the echo sounder. P3406E/B...
  • Page 236 Drawings Document revisions Documentation Hardware/Software Project/Product department Design Management Date Sign Date Sign Date Sign 25.08.95 25.08.95 31.08.95 15.03.96 18.03.96 18.03.96 P3406E/B...
  • Page 237 500 series portable echo sounder List of Drawings System interconnection diagram ....824-111020 ( 652-05) Power system ........824-111079 (652-33) Transducer connections .
  • Page 238 Drawings 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 and EY 500. P3406E/B...
  • Page 261 Remote Control" in the EY 500 Instruction Manual. DESCRIPTION The Simrad EY 500 echo sounder outputs binary telegrams over the DISK interface and the RS232 interface on PC (default COM2). This program translates binary telegrams into ASCII telegrams providing a useful mechanism for displaying the content of binary data.
  • Page 262 [dBW]. V1 provides volume backscattering strength sample data: header, time tag ,amplitude data points [dB]. P1 provides target strength sample data: header, time tag, amplitude data points [dB]. Simrad Subsea A/S Horten - Norway...

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