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Maintenance 850-130682 / AA000 / 1-11 EA 500 Maintenance This section of the manual describes the maintenance to be performed by the system operator.
Kongsberg Simrad EA 500 / Base version Document revisions Rev Date Written by Checked by Approved by A 15.03.96 CL OL EF B 21.10.
Maintenance Table of contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 PREVENTIVE MAINTENANCE ACTIONS . . . . . . . . . . . . . . . . .
Kongsberg Simrad EA 500 / Base version Document history (The information on this page is for internal use) Rev.A Rev.B IV First edition as a combined module for EA 500 and EK 500. Was section 5 of P2158E and P2170E. Document transferred to QS, now only valid for EA 500. No changes to the text.
Maintenance 1 INTRODUCTION This chapter describes the preventive maintenance to be performed by the system operator. For details about corrective maintenance, refer to the EA/EK/ES 500 Service Manual. For information about error messages, refer to appendix ”Status and error Messages”. 2 PREVENTIVE MAINTENANCE ACTIONS The preventive maintenance is very limited. When required, clean the surfaces of the equipment with a soft, lint-free cloth and a mild detergent.
Kongsberg Simrad EA 500 / Base version Blank page 2 850-130682 / B
Simrad EA 500 / EK 500 STATUS AND ERROR MESSAGES P2265E / 859-043870 / 4AA005 This section of the manual details the status and error messages that may be displayed by the echo sounder from time to time. All the possible messages are listed, and an explanation is given for each.
Status and error messages Document revisions Rev 2 Documentation department Hardware/Software Design Project/Product Management Date Sign Date Sign Date Sign E 15.03.96 CL 18.03.96 OL 18.03.96 EF F 22.05.97 CL 22.05.97 HS 22.05.
Simrad EA 500 / EK 500 List of contents 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 GENERAL MESSAGES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 SIGNAL PROCESSOR (SP) ERROR MESSAGES . . . . . . . . . . . . . . . . . . 3.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 LIST OF SIGNAL PROCESSOR ERROR MESSAGES . . . . . . . . . .
Status and error messages Document history (The remainder of the information on this page is for Simrad internal use). Revisions: Rev. A Rev. B Rev. C Rev. D Rev. E Rev. F 4 01.02.91 25.06.92 31.08.92 16.06.93 Original edition. Minor changes to text. Document updated, minor changes to text. Document re-formatted to bring it up to Simrad standards. Document re-formatted to bring it up to new Simrad standards. This document now applies for both EA 500 and EK 500 echo sounders.
Simrad EA 500 / EK 500 1 INTRODUCTION The 500-series echo sounders may issue alarms, errors, warnings and other messages to the display and external devices (via serial port or Ethernet). Note that the # sign indicates the number of the transceiver unit affected (1/2/3). No number is issued for echo sounders with only one transceiver. Note that the lists include messages for all the echo sounders in the 500 series. 2 GENERAL MESSAGES All messages starting with "SP-#" concern signal processor no.
Status and error messages Message Explanation LAN UDP port busy * LAN 82586 init error Unable to initialize 82586 chip. Possible hardware fault.
Simrad EA 500 / EK 500 Message Explanation Disk full External critical alarm External critical alarm received External alarm External alarm received Table 1 * = Internal software problem encountered. If this error code is displayed, the incident should be reported to Simrad.
Status and error messages 3 SIGNAL PROCESSOR (SP) ERROR MESSAGES 3.1 INTRODUCTION The signal processor will read the control parameters sent by the control processor before initiating a new ping. The program will then test each parameter against its legal values. If the parameter is found to be illegal, or the value does not agree with the other settings, an error message code is sent to the control processor which will issue the error message.
Simrad EA 500 / EK 500 3.2 LIST OF SIGNAL PROCESSOR ERROR MESSAGES Note that the # sign indicates transceiver number (1/2/3) and that all error messages end with "error". Error message Legal values SP-# angle sensi. error 0 to 100 el./mech. SP-# bandwidth error 0 to 1 SP-# beamtype error 0 to 1 SP-# btm. min. level error -80 to 0 dB SP-# btm. max. depth error 0 to 20000 m SP-# btm. min. depth error 0 to 1000 m SP-# damping coeff.
Status and error messages Error message Legal values SP-# TS min. length error 0 to 10 SP-# TS max. length error 0 to 10 SP-# TS max. comp. error 0 to 6 dB Table 2 Note I SP-# device data error The appropriate error message in Table 2 will be displayed if one or more of the following parameters are outside legal limits: Parameter Legal values Bottom echogram dots 0 to 200. Bottom range 0 to 100 m. Bottom range start -100 to 100 m. Echogram dots 0 to 1000. Range 0 to 10000 m.
Simrad EA 500 / EK 500 Note II SP-# transd. parameter error The appropriate error message in Table 2 will be displayed if one or more of the following parameters are outside legal limits: Parameter Legal values Alongship offset angle -20° to 20° mechanical. Athwartships offset angle -20° to 20° mechanical. Three dB bandwidth 0° to 50° mechanical.
Status and error messages 12 P2265E/F
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.
Calibration Document revisions Rev Documentation department Date 2 Sign Hardware/Software Design Date Sign Project/Product Management 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 20.05.97 Cl 20.05.97 HS 20.05.
Simrad EK 500 / EY 500 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration Document history (The information on this page is for Simrad’s internal use) Revisions: Rev. A Rev. B Rev. C Rev. D Original issue Minor changes to the text. Minor changes to the text. EY 500 implemented. Various changes in the procedures. A chapter about the lobe calibration program is added. Ref. EM 10526. Rev. E Some uneccessary information removed from pages 16-17, and a few minor corrections made on page 6, 8, 15 and on the Calibration Report sheet.
Simrad EK 500 / EY 500 1 THE PURPOSE OF CALIBRATION The EK 500 and EY 500 are scientific echo sounders designed for quantitative measurements, i.e. measurement of single fish target strength and measurement of biomass backscattering coefficient. During the calibration a reference target with a known target strength is lowered into the sound beam, and the measured target strength is compared with the known target strength.
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. Select the Test Menu/Transceiver. The amplitude of the internal test oscillator is now displayed.
Simrad EK 500 / EY 500 WINCH 1 WINCH 3 WINCH 2 (CD481) Figure 1 Rigging of a vessel for sphere calibration.
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. Use this rope to pull the line from the first winch beneath the hull to the side with the second and third winches.
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.
Calibration Simrad sept. 1992 1550 lin Sa 1500 ity Mackenzie (1981) J.acoust.Soc.Am., 70,807-12. Del Grosso (1972) J.acoust.Soc.Am., 52,1442-6. SOUND SPEED IN SEA WATER at depth 0 m m/s 40 Sa lini ty 0 1450 1400 0 5 15 10 20 25 30 WATER TEMPERATURE (deg. C) (CD467) Figure 3 Sound speed in water. 60 SIMRAD sept. 1990 50 FRANCOIS & GARRISON JASA dec.
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. Note that in the following procedures, references to transceiver 1, 2 and 3, and printer 1, 2 and 3, only apply to the EK 500 echo sounder. The EY 500 only uses one transceiver and one printer.
Calibration Select the Layer Menu/Layer-1 Menu and set Type: Range: Range Start:@ Margin: Sv Threshold: No. of Sublayers: Surface The layer must be wide enough to cover the sphere echo during the movements in the centering operation. Otherwise it should be as narrow as possible, in order to exclude disturbing fish echoes. Be sure that also the bottom echo as well as the trailing edge of the transmitter pulse and the echo from the additional weight are outside the layer. 0.
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. A second method is useful if a single beam transducer is located close to a split beam transducer.
Calibration Single beam transducer Split beam transducer d Minimum distance r µ The sphere after being moved to the centre of the single beam The sphere in the centre of the split 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. Accordingly, this depth scale is different for the different frequencies. Check that the sphere is well within the super layer.
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. TS-measurement Select the TS-Detection Menu to get the horizontal projection window. With the sphere in the center of the beam, the TS compensated and the TS uncompensated should be identical. These values are read on the screen underneath the horizontal projection window.
Calibration Check the cable connection to colour printer-1. Switch on colour-printer-1. Select the Printer1 Menu and set Integrator Tables: Echogram: Number of the transceiver in use (if EK 500) Slave The echogram recording will then be similar to the one at the display. Read the measured sA-value, the red number in the integrator table after each log interval.
Simrad EK 500 / EY 500 3 THE LOBE CALIBRATION PROGRAM 3.1 UNPACKING AND STARTUP This software package greatly simplifies the task of determining the optimum transducer pattern parameters to be used in the EK 500/EY 500 Transceiver Menu. The program runs on IBM PC/XT/AT’s and compatibles. It is strongly recommended to have a mathematics coprocessor (8087/80287/80387) installed in the computer to speed up the estimation and plotting algorithms.
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. To view the true transducer pattern. A two-dimensional polynomial of the fourth degree is least square fitted to the measured data points and displayed.
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. 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 of the horizontal arrow keys.
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. If it is close to the limit, you may, when moving the sphere, easily end up with TS values outside the window that will be rejected.
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. values are shown by a red and a blue cross in the polar diagram. The recorded max. and min. samples should be removed by using the editor if the deviations are more than approx. 1 dB. Note the line numbers to locate these unwanted data.
Calibration Figure 8 22 P2260/E
Simrad EK 500 / EY 500 Figure 9 P2260/E 23
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. In addition, the noise plot may be a guide in choosing the vessel speed during acoustic surveys.
Simrad EK 500 / EY 500 Select the Log Menu and set: Mode: Ping Interval: Ping 200 Select the Display Menu and set: Echogram Speed: 1:1 Echogram: 1 Select the Display Menu/Echogram-1 Menu and set: Range: Range Start: According to table below According to table below Frequency (kHz) 18 38 120 200 Auto Range: Bot. Range Pres. Presentation: Layer Lines: TVG: Sv Colour Min.
Calibration Select the Layer Menu/Layer-1 Menu and set: Type: Range (layer thickness L) Range Upper: Sv Threshold No. of Sublayers: Frequency kHz 18 38 120 200 Range L m 50 20 10 5 Pelagic See table below See table below -100 dB 1 Range Start m 3975 990 195 147,5 2TL dB 96 80 61 59,5 Range settings and transmission loss for different frequencies Start the noise - speed trial with the vessel in a fixed position. Make a short echogram recording and an integration table for the same interval.
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. The SA method gives the average echo level from a volume of water during a specified time interval. The P N method is from one individual power sample in each ping. The equations for calculating from recorded data to NL is given below.
Calibration n is the plane wave sound pressure in front of the transducer Pa n2 = IN . D c D is water density = 1000 kg/m3 c is the speed of sound = 1500 m/s NL = 20 log n + 120 dB re 1 µPa 120 dB is introduced for conversion from Pa to µPa For the reason of documentation it is recommended to record one scope plot at survey speed. Select the Printer-1 Menu/Echogram-1 Menu and set: Presentation: Scope.
Simrad EK 500 / EY 500 Ref. no . Revolutions Engine r.p.m. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Propeller r.p.m. 0 Propeller pitch Vessel speed Measured SA Knots 0 Increasing 2 Increasing 4 Increasing 6 Increasing 8 Increasing 10 Increasing 12 Increasing 14 Increasing 16 m2/nm2 NL from SA dB re. 1 FPa Test menu NOISE dB re. 1W NL from test menu dB re. 1 FPa Disconn.
Calibration Blank page 30 P2260/E
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:...................
Calibration Blank page 32 P2260/E
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