{"id":16016,"date":"2026-01-08T15:18:43","date_gmt":"2026-01-08T07:18:43","guid":{"rendered":"http:\/\/www.erun-tech.com\/?post_type=dt_portfolio&p=16016"},"modified":"2026-01-08T15:18:43","modified_gmt":"2026-01-08T07:18:43","slug":"jichengyishebeidejibencaozuoyujishuweihu","status":"publish","type":"dt_portfolio","link":"http:\/\/www.erun-tech.com\/en\/project\/jichengyishebeidejibencaozuoyujishuweihu","title":{"rendered":"Basic operation and technical maintenance of the meter equipment"},"content":{"rendered":"
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Basic operation and technical maintenance of the meter equipment<\/h1>\n
Equipment Model: FURUNO DS-80 Doppler Meter<\/div>\n<\/div>\n
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I. Structure of DS-80 Doppler Meter<\/h2>\n

The DS-80 Doppler Meter is a typical product of the DS series of meters from FURUNO Electric. It utilizes computer processing technology to provide a high degree of measurement accuracy that fully meets IMO and International Electrotechnical Commission (IEC) regulations.<\/p>\n

The DS-80 Doppler Meter consists of a main display, sub-displays, processor, junction box, transceiver, and transducer, as shown in Figure 5-1-1.<\/p>\n

\"3c922b40a0a7b182c6e91676cdbc7b24\"Figure 5-1-1 DS-80 Doppler Meter Machine Structure<\/p>\n

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main monitor<\/strong>It assumes the functions of maneuvering and controlling the whole machine and displaying the measurement results, and the data that can be displayed include the forward\/backward speed of the ship, the left\/right transverse speed of the bow, the accumulated voyage, and the water depth under the keel of the ship.<\/p>\n

processing unit<\/strong>The internal components include a power supply circuit, a Doppler gate circuit and a microprocessor. Its main function is twofold: firstly, to generate trigger pulses and transmit them to the transceiver unit, thus commanding the transceiver to work; secondly, to convert the echo signals received by the transceiver into speed signals, which in turn are transmitted to the main display or other sub-displays.<\/p>\n

transceiver<\/strong>The DS-80 Doppler Meter's function is to generate electrical oscillating pulses to excite the transducer to emit ultrasound to the bottom of the ocean, and at the same time to receive the echo signal from the transducer, amplify the signal, and convert it into an electrical signal for transmission to the processor. It should be noted that some models of the DS-80 Doppler Scope Meter have the transceiver and processor integrated into one unit, thus simplifying the installation process.<\/p>\n

split-monitor<\/strong>There are two types, digital and indicator, whose signals are derived from serial data or analog data provided by the processor, and are functionally identical to the main display.<\/p>\n<\/div>\n<\/section>\n

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II. Basic operation and information view of the meter equipment<\/h2>\n

(i) Starting<\/h3>\n
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(1) Press the \u201cPOWER\u201d key to turn on the power, the machine first enters the self-test state.<\/strong><\/p>\n

Three \u201c0s\u201d will flash in the speed display window for 1 minute, and the memory, light emitting diode, and buzzer will be detected in turn. If the detection is normal, the program version number (P\u00d7\u00d7) of the main display will appear in the vertical speed display window, and the program version number (P\u00d7\u00d7) of the processor unit will appear in the first three digits of the voyage display window. If the detection is not normal, a corresponding error message will be indicated. Such as:1 is a ROM error, 2 is a RAM error, and 3 is an EPROM error.<\/strong>\u3002<\/p>\n

(2) Self-test is complete and normal speed and range (or water depth) display appears.<\/strong><\/p>\n

(3) Adjust the panel display brightness with the \u201cDIMMER\u201d control knob and press the \u201ckt\/m\/s\u201d key to select the unit of speed measurement.<\/strong><\/p>\n

(4) Press the \u201cMODE\u201d key to select the meter tracking mode (subsea\/pelagic\/automatic) and the corresponding indicator lamps G, W, A will be lit.<\/strong><\/p>\n

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  • Subsea tracking (G): Depth range is 1~200m below the keel;<\/li>\n
  • Water tracking (W): Depth range is 2~25m below the keel;<\/li>\n
  • AUTO TRACKING (A): will automatically switch between subsea and pelagic tracking states based on actual water depth.<\/li>\n<\/ul>\n

    (5) Press the \u201cDistance\/Keel Clearance\u201d button to select either the range display or the under keel water depth display.<\/strong>Voyages are displayed in nautical miles and water depths are displayed in meters, feet, or fathoms.<\/p>\n

    (6) Preset initial voyage:<\/strong>The range data can still be saved after the power is turned off, and the SET key can be used to clear the range or enter the initial preset range.<\/p>\n<\/div>\n

    (ii) Viewing of information<\/h3>\n

    The main display panel of the DS-80 Doppler Meter has three display areas from top to bottom:<\/p>\n

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    • At the top is the bow left\/right traverse speed display area:<\/strong>When normally displayed, the left-arrow or right-arrow icons are illuminated to indicate the current direction of bow traverse.<\/li>\n
    • In the center is the vessel forward\/reverse speed display area:<\/strong>The left side of this display indicates the tracking method, where G stands for subsea tracking, W for water layer tracking, and A for automatic tracking; the right side is used to display speed units, self-test status, and speed alarm messages.<\/li>\n
    • At the bottom is the voyage\/under keel water depth display area:<\/strong>The upper part of the display indicates the status of the display, labeled \u201cDistance\u201d and \u201cKeel Clearance\u201d; the right part shows the units of the voyage.<\/li>\n<\/ul>\n<\/section>\n
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      III. Self-testing operation of the tachograph<\/h2>\n

      \u201cIn the \u201dSYSTEM MENU 2\u201c you can open the \u201dTEST\u201c (Diagnostic Test): to check if the device is functioning correctly. The \u201dTEST\" menu allows you to diagnose and check the program number. The diagnostic function checks the ROM, RAM and SIO and displays the program ID.<\/p>\n

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      1. Access to the test:<\/strong>Press the \u201cMENU\u201d key to open the menu, select \u201cSYSTEM MENU 2\u201d (System Menu 2), then press the \u201cENT\u201d key; press the \u201cENT\u201d key again. Press \"ENT\" again. As shown in Figure 5-1-2(a), the Test Start display appears.<\/p>\n

      \"e9c7eee27bd595cf6c19685b0040fe23\"2. Commencement of testing:<\/strong>Press the \u201cENT\u201d key to start the test. After a few moments, the display changes as shown in Figure 5-1-2(b).<\/p>\n

      3. Judgment of results:<\/strong>Checking that the ROM, RAM and SIO (if special connectors are used) are functioning correctly shows the following\u201cOK\u201d (normal) or \u201cNG\u201d (abnormal)<\/strong>. The program number also appears here.<\/p>\n

      4. Cross-checking:<\/strong>Highlight \u201cPUSH KEY\u201d to prompt control check. Operate any control (except the \u201cPOWER\u201d switch) within 5 seconds. If it works correctly, the name of the enabled control will appear on the screen. Note that if no control is operated within 5 s, the unit will automatically begin checking the LCD, and the test will repeat automatically when the automatic LCD check is complete.<\/p>\n

      5. Discontinuation of testing:<\/strong>To stop the test, turn the power switch off and on again.<\/p>\n<\/div>\n<\/section>\n

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      IV. Connection of the meter to other navigational equipment<\/h2>\n

      The main output peripherals and functions realized by the Marine Meter are shown in Table 5-1-1.<\/p>\n

      Table 5-1-1<\/b><\/strong>\u00a0List of the main output peripherals and functions realized by the Marine Meter<\/b><\/strong><\/p>\n

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      Table 5-1-1 List of Main Output Peripherals and Functions of the Marine Meter<\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n
      Output Peripheral Name<\/th>\nDescription of the main functions<\/th>\n<\/tr>\n<\/thead>\n
      Gyrocompass<\/td>\nCorrecting gyrocompass velocity errors<\/td>\n<\/tr>\n
      VDR<\/td>\nRecord ship dynamic speed data<\/td>\n<\/tr>\n
      Electronic Charts (ECDIS)<\/td>\nReal-time speed display, speed safety check and alarm<\/td>\n<\/tr>\n
      IBS (Integrated Bridge Building System)<\/td>\nReal-time speed display, speed safety checks and alarms, and IBS unified speed reference.<\/td>\n<\/tr>\n
      Radar (Radar\/ARPA)<\/td>\nReal-time speed display, radar target mapping, PAD implementation, true motion display<\/td>\n<\/tr>\n
      AIS (Automatic Identification System)<\/td>\nDisplay and send dynamic speed information<\/td>\n<\/tr>\n
      calculator<\/td>\nSpeed display, machine inspection and testing with the help of specialized software<\/td>\n<\/tr>\n
      subdisplay unit<\/td>\nAnalog or digital speed display<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

      Signal Input:<\/strong>The DS-80 Doppler Meter is capable of accessing the GPS navigational outputs of ship's position, SOG (Speed on Ground), and COG (Course on Ground) input signals. These input signals need to comply with the IEC 61162-1 and NMEA 0183 protocols<\/strong>Typical statement formats include GGA<\/strong> (containing information on time, latitude, precision, etc.) and VTG<\/strong> (including SOG and COG information). After the meter is connected to the ship's position information, the operator can conveniently check the correspondence between speed and ship's position on the display panel.<\/p>\n

      Signal output:<\/strong>The speed and range data from the tachymeter can be output to repeaters, electronic charts, VDRs, radars and other devices. The output signals also conform to the IEC 61162-1 and NMEA 0183 protocols<\/strong>, typical statement formats include:<\/p>\n

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      • VBW:<\/strong>velocity to water or to ground. The signal output interval is 3s<\/strong>\u3002<\/li>\n
      • VLW:<\/strong>For water voyages. The signal output interval is 1s<\/strong>\u3002<\/li>\n
      • Pulse Signal:<\/strong>In addition, the meter's speed and range data are available in a 200 p\/n mile<\/strong> The form of the pulses is transmitted to the radar, i.e., every 0.005 n mile<\/strong> outputs a pulse signal for the change in the voyage of the<\/li>\n<\/ul>\n<\/section>\n