Kongsberg Discovery disclaims any responsibility for damage or injury caused by improper installation, use or maintenance of the equipment. Disclaimer Kongsberg Discovery AS endeavours to ensure that all information in this document is correct and fairly stated, but does not accept liability for any errors or omissions. Support information If you require maintenance or repair, contact Kongsberg Discovery’s...
Installation Manual Table of contents ABOUT THIS MANUAL..................9 EM2042......................10 System description......................11 System diagram – Single RX.................... 14 System diagram – Dual RX....................15 System diagram – Dual TX....................17 Main system units......................19 Transducer description..................19 Processing Unit description................. 19 Portable Processing Unit description..............
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Transducer mounting plate.....................67 Rules for transducer handling..................70 Painting the transducer face................... 72 Approved anti-fouling paints..................74 INSTALLING THE EM2042 SYSTEM HARDWARE UNITS......75 Installing the Processing Unit..................76 Installing the Processing Unit................77 Processing Unit rear panel description..............79 Processing Unit circuit boards and modules............80 CBMF board - dip switch setting................81...
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Serial adapter - D-sub to RJ45 connector............111 Clock synchronization (1PPS) using a coax cable..........113 External synchronization cable................113 K-Sync interface to EM2042 Processing Unit.............115 Interface to Remote Control Unit for external synchronisation......117 K-Sync interface to Remote Control Unit............118 Remote control....................
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EM2042 Receive Transducer cable.................. 130 Receive transducer cable - Portable Processing Unit........132 RX to TX transducer cable..................134 TX to RX2 transducer cable................136 Overview of EM 2042 transducer cables............137 Steel conduits....................... 139 Handling of underwater connectors................140 Basic cable requirements....................142 Cable trays......................
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Portable Processing Unit – environmental requirements........187 Alignment specifications....................188 Hydrographic Work Station – technical specifications..........190 EQUIPMENT HANDLING................191 Transporting Kongsberg Discovery equipment............. 192 Lifting units and transportation boxes................194 Inspection of units and transportation boxes after arrival........... 196 Specifications for storage prior to installation or use........... 197 Unpacking instructions....................
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Cleaning a mechanical or electromechanical unit..........208 Handling instructions for printed circuit boards and electronic modules....210 Unpacking and handling printed circuit boards and electronic modules..210 Returning a printed circuit board or an electronic module to Kongsberg Discovery......................212 About Electrostatic Discharge (ESD)..............213 Disposal of old products and parts................
We assume that you are familiar with the basic acoustic principles of sound in water. We also expect that you have some experience with multibeam and/or single beam echo sounders in hydrographic applications.. Online information For information about the EM2042 and other products from Kongsberg Discovery, visit our website. • https://www.kongsberg.com/discovery/ Registered trademarks Observe the registered trademarks that apply.
EM2042 Installation Manual EM2042 Topics System description, page 11 System diagram – Single RX, page 14 System diagram – Dual RX, page 15 System diagram – Dual TX, page 17 Main system units, page 19 Scope of supply, page 22...
The EM2042 delivers a beamwidth of 0.7º at 400 kHz in a reduced array length, or 0.4 º when using extended transducers, both optionally embedding an AML sound velocity sensor, and a fully integrated Kongsberg Seatex miniMRU.
• Dual Swath for Single RX systems, increasing the along track sounding density • Beamwidth: • EM2042-04: 0.4x0.7 degrees at 400 kHz • EM2042-07: 0.7x0.7 degrees at 400 kHz • Displaying and logging of water column data is included for SIS users •...
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EM2042 Important CAUTION When the EM2042 transducers are connected to the PU and out of the water: • Do not ping in air as this can harm the transducer elements. • The transducers should only be powered up for a limited time.
EM2042 Installation Manual System diagram – Single RX The system diagram identifies the main components of a basic EM2042 system. Only the main connections between the units are shown. Detailed interface capabilities and power cables are not shown. A. Hydrographic Work Station (HWS) B.
EM2042 System diagram – Dual RX The system diagram identifies the main components of a dual RX EM2042 system. Only the main connections between the units are shown. Detailed interface capabilities and power cables are not shown. PROCESSING UNIT MULTIBEAM ECHO SOUNDER (CD020112_101_002) A.
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EM2042 Installation Manual C. Processing Unit (PU) D. Interfaces PU: • Positioning systems • Attitude (roll, pitch and heave) • Sound velocity sensor • Velocity • Heading • Clock • Trigger input/output • Clock synchronization (1PPS) E. Transmit transducer (TX) Receive transducer (RX) G.
EM2042 System diagram – Dual TX The system diagram identifies the main components of a dual TX EM2042 system. Only the main connections between the units are shown. Detailed interface capabilities and power cables are not shown. PROCESSING UNIT MULTIBEAM ECHO SOUNDER A.
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EM2042 Installation Manual C. Processing Unit (PU) D. Interfaces PU: • Positioning systems • Attitude (roll, pitch and heave) • Sound velocity sensor • Velocity • Heading • Clock • Trigger input/output • Clock synchronization (1PPS) E. Transmit transducer (TX) Receive transducer (RX) G.
Remote Control Unit (K-Rem) description, page 21 Transducer description A transducer is a device that converts one form of energy to another. The EM2042 uses separate transducer arrays for transmitting and receiving sound pulses. The EM2042 system can be delivered in various versions, each with different transmission beam widths.
EM2042 Installation Manual Portable Processing Unit description The Portable Processing Unit is a ruggedized IP67 (unmated and mated) version of the standard Processing unit that runs on 24 VDC (18-36VDC). The Portable Processing Unit can interface directly to the Seapath 130. The front plugs “Seapath” and “MRU”...
The Hydrographic Work Station is based on a commercial design. Due to the constant development of new computer parts, older parts are no longer manufactured. This means that the computer type used with the EM2042 system changes from time to time.
Scope of supply Basic items provided with a standard delivery To assemble a complete EM2042 system you need all the system units. The main units you need are provided with the standard delivery. Some items are optional. The EM2042 system is available in various configurations.
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• 04 TX transducer, EM2042 • Cables: • TX-RX Sync Cable for EM2042 SRX for portable mounting plate (bracket) • RX to payload bulkhead cable, 1.2 m (90-angled at RX) • Transducer cable for EM2042 with 13p female bulkhead connector and 0.6m internal cable •...
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• Cables: • TX-RX Sync Cable, 0.8m for EM2042 SRX TX-RX Sync Cable for EM2042 SRX for portable mounting plate (bracket) • RX Transducer Cable for PU with a straight plug at RX: 8/15/45 m long OR RX Transducer Cable for PU with a 90-angled plug at RX: 8/15/45 m long •...
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EM2042 • Transducer Adapter Plate for TX transducer (07TX or 04TX) • POM cover plates End-user documentation The system manuals can be found within the SIS installation or at https://www.kongsbergdiscovery.net/sis/sw.htm 110-0003725/B...
EM2042 system. If you wish to connect the EM2042 system to the ship's local area network, you must implement the same security mechanisms on the EM2042 computer(s) as for the rest of the network.
Support information Should you need technical support for your EM2042 system you must contact a Kongsberg Discovery office. A list of all our offices is available on our website. You can also contact our main support office in Norway. A 24 hour telephone support service may also be available depending on your Service Level Agreement.
If you need specific consumables, or if special tools and/or test instruments are required, these are identified in the relevant procedure(s). Personnel qualifications EM2042 is a flexible system that can be installed in many different ways. Use qualified personnel when needed. Contact Kongsberg if onsite installation assistance is required.
Requirements for electrical installations, cables and communication, page 31 Environmental requirements The EM2042 topside units must be installed in a dry and dust-free environment. The units are not fully protected against humidity, dust or moisture. It is important that the sonar room is kept clean and dry. The system units must not be exposed to excessive temperatures, dust, moisture or humidity.
The air conditioning system must be able to provide an ambient temperature that does not exceed the maximum operating temperatures of the EM2042 units that are installed in the room. Requirements for electrical installations, cables and...
Cabling requirements The sonar room units are connected to other EM2042 units located in different compartments on the vessel. The units may also be connected to peripheral devices. If these cables pass through hatches or areas where they may be damaged, they must be run in conduits.
Preparing the installation Where to install the transducer Topics Introduction to transducer location, page 33 Mount the transducer deep, page 33 Avoid protruding objects near the transducer, page 34 Keep the transducer far away from the propellers, page 35 Mount the transducer at a safe distance from bow thruster(s), page 35 Summary and general recommendations, page 35 Introduction to transducer location A single answer to the question "where to install the transducer"...
The effect of slamming can be reduced by mounting the transducer as deep as possible on the hull. Note Kongsberg Discovery AS takes no responsibility for any damages to the transducer, the cable or the mounting arrangement, caused by slamming. Avoid protruding objects near the transducer Objects protruding from the hull will generate turbulence and flow noise.
When in operation, the noise and cavitation bubbles created by the thruster may make your EM2042 transducer useless, almost no matter where it is installed. When the bow thrusters are not in operation, the tunnel creates turbulence. If your vessel is pitching, the tunnel may be filled with air or aerated water in the upper position and release this in the lower position.
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EM2042 Installation Manual Note Mounting the transducer more than 10–15 meters from the bow may cause problems with the turbulent flow. CD010496_001_001 A. Transducer C. Hull length at water line B. Inclination angle D. Maximum 1/3 of the hull length at...
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Preparing the installation Important: The transducer must not have a negative inclination angle compared to water flow. Do not place a transducer near protruding objects, and especially not close behind them. Make sure that the surface of the resulting installation is as smooth and streamlined as possible.
EM2042 Installation Manual Acoustic noise As with any other hydroacoustic systems, the quality of the EM2042 echo data and presentations are subject to unwanted acoustic noise. The echoes from any large and small target must be detected inside the noise.
Preparing the installation therefore it is necessary to keep the noise level as low as possible in order to obtain high echo interpretation. The noise that contributes to the signal to noise ratio may be divided into the following types of noise: •...
EM2042 Installation Manual Electrical noise Modern vessels are normally equipped with a lot of electric instruments such as hydroacoustic systems, radars, navigation systems, and communication equipment. Any electric instruments may in some cases cause electrical interference and noise. International regulations and certifications are used to control and reduce this, but even these are limited if the electrical systems are poorly installed and/or maintained.
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Preparing the installation • The laminar flow is a nicely ordered, parallel movement of the water. • The turbulent flow is a disorderly flow pattern, full of eddies. Turbulent flow Laminar flow Air bubbles Air bubbles absorb and reflect the sound energy, and they may in worst cases block the sound transmission altogether.
EM2042 Installation Manual Interference Interference from other hydroacoustic equipment on board the same vessel may be an annoying source of disturbance. Unless the same frequency is used for more than one piece of equipment only the transmitted pulse will contribute to the interference.
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Preparing the installation the hull. Other factors deal with other equipment mounted on board, and this will also be vessel dependant. At moderate ship speeds the machinery noise is usually dominant. At medium speeds the flow noise increases more rapidly and takes over, while at higher speed the propeller noise will be the main contributor.
• Make sure that all units are properly grounded. This is important to avoid electrical noise. • Use shielded cables with correct grounding. • Separate the cables used by the EM2042 system from other cables with high voltages, large currents or transients. • Place all high voltage power cables in metal conduits.
• Flush mounted • Externally mounted with fairings • Keel box • Portable • Hull unit • Drop keel Not all installation principles are possible for all EM models. EM124 EM304 EM712 EM2040 series EM2042 Gondola Blister Flush mounted X 110-0003725/B...
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Once the installation method is defined, the installation shipyard must provide the necessary drawings. These drawings must be approved by the vessel’s classification authority. If required, Kongsberg Discovery AS can assist with the required engineering. 110-0003725/B...
This is often the preferred installation approach for Kongsberg Discovery and the method that gives the optimum weather window and system performance. The gondola can be tailored to fit the ship and also the scope of supply.
Blisters of different sizes and shapes have been used from the early days of echo sounder installation, and this method of installation is a well known principle. A blister is well suited for refitting a vessel with an EM2042 system. The blister can also be used for other sonar and echo sounder transducers.
Preparing the installation Flush mounted With the flush mount method the transducers are installed inside the ship's hull. This method exposes the transducers to passing air bubbles which might affect the system performance. The benefit of a flush mounted installation is that nothing protrudes from the keel.
EM2042 Installation Manual Externally mounted with fairings The transducer arrays can be mounted directly under the vessel’s hull. A fairing will usually be added around the transducers to ensure laminar water flow without any aeration problems. Installation with fairings has proven successful in former multibeam echo sounder installations.
Preparing the installation Portable installation For temporary installations on a vessel the transducer might be deployed on a pole fixed to the bow or to the side, or in a moon pool. Main considerations when using a non-permanent installation • The mounting structure must be sufficiently rigid. Dynamic displacements of the transducer must be less than the installation accuracy requirements.
EM2042 Installation Manual Transducer installation using a hull unit A hull unit may be used to lower the EM2042 transducer into the water for use. When not in use, the transducer is retracted into a protective installation trunk. A hull unit is commonly used on sonars.
• You have good knowledge about hydroacoustic systems and the challenges related to the physical installation of these. Context The outline dimensions of the EM2042 transducer and the relevant installation items can be found in the Drawing file chapter in this manual. See:...
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60 Do a dimensional survey to determine the necessary position and angle measurements of the transducer and the relevant sensors. The information provided by the dimensional survey is entered into the EM2042 software as installation parameters. See: Dimensional surveying and alignment, page 150 Lay the transducer cables from the transducers to the Processing Unit.
EM2042 Installation Manual The list of approved anti-fouling paints can be found on our website. • https://www.kongsberg.com/anti-fouling-paints Related topics Equipment handling, page 191 General safety rules, page 217 110-0003725/B...
Installing the transducer Installing the transducers in a casing We recommend using Kongsberg designed mounting plates and casings/pods whenever possible. Prerequisites Before you can do this task, the following prerequisites must be met: • All relevant vessel and transducer drawings must be available.
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• AquaShield S1315 (Houghton International) • Loctite 243 (medium-strength threadlocker) Procedure Align and weld the casing to the hull according to Kongsberg requirements. Mount the transducer mounting plate in the casing using the screws and washers provided. Apply Locktite 243 on the mounting screws.
Do a dimensional survey to determine the necessary position and angle measurements of the transducer and the relevant sensors. The information provided by the dimensional survey is entered into the EM2042 software as installation parameters. Mount the cover plate using the screws provided.
EM2042 Installation Manual Installing the transducers - Portable installation The portable mounting plate for the EM2042 multibeam echosounder allows for versatile and quick installation on various vessels, including small boats and USVs. The portable plate can be mounted over the side, on the bow or within the moon pool of a vessel.
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Use the following torque: 43 Nm If applicable, mount the optional external MRU. The bracket for portable mounting has room for an external MRU. A Kongsberg MRU will fit directly on the portable mounting blacket.. An adapter plate is available for fitting other brands of MRU. (C) If appliccable, mount the optional external Sound Velocity Sensor.
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EM2042 Installation Manual Location offsets for the portable mounting plate Point X offset (mm) Y offset (mm) Z offset (mm) Center of the "hole" for cabling on the -166.5 portable plate w/o brackets Center of the "hole" for cabling on the -166.5...
The transducers are made from composite ceramics which enables a wide bandwidth. The transducer housing is made of Titanium. The EM2042 system is fully prepared for upgrading to cater for more demanding applications. Adding a second receive transducer increases the angular coverage.
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EM2042 Installation Manual The RX transducer is available with an optional embeded Motion Reference Unit (MRU). Offsets for miniMRU to RX reference point: • : 0 mm X offset • : 86 mm Y offset • : 65 mm Z offset...
Installing the transducer Transducer orientation Correct location, orientation and alignment of the transducers is important for the performance of the system. The two transducers are mounted as “T” or “L” configurations under the vessel’s hull (Mills Cross configuration). The transmit transducer should be aligned parallel to the vessel’s keel.
EM2042 Installation Manual Cable support All cables must be supported and protected along their entire lengths using conduits and/or cable trays. The only exception to this rule is over the final short distance (maximum 0.5 meters) as the cables run into the cabinets/units to which they are connected. These short service loops are to allow the cabinets to move on their shock mounts, and to allow maintenance and repair.
Installing the transducer Transducer mounting plate To ease installation, a mounting plate is delivered with the transducers. The mounting plate is fitted with a guidance system that ensures that the transducers are aligned within the required accuracy. We strongly advise using the mounting plate that is provided. The mounting plate is delivered with wedge-locking washers, which should be used.
EM2042 Installation Manual Adapter plates Adapter plates are used between the transducers and the mounting plate. The mounting plate is the same as the one used for EM2040. The adapter plates are specific to EM2042. 0.7 degrees 0.4 degrees Casing...
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Installing the transducer Flatness The mounting structure must not deviate from a flat surface more than ± 0.2 mm. If the mounting plate is not used, the same requirement applies to the surface where the transducer is mounted. Applicable torque values The mounting plate must be bolted to the structure.
EM2042 Installation Manual Rules for transducer handling To secure long life and accurate results, the transducer must be handled correctly. You must always handle the transducer as a delicate instrument. Incorrect actions may damage the transducer beyond repair. Observe these transducer handling rules: Do not ping when the transducer is out of the water.
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The list of approved anti-fouling paints can be found on our website. • https://www.kongsberg.com/anti-fouling-paints Non-permanent transducer installations For non-permanent installations, rinse the transducer with fresh water every time you take it out of the water.
The use of anti-fouling paint will reduce the acoustical performance of the transducer. The properties of the transducer face combined with the thickness of the anti-fouling paint can also affect the overall performance. Kongsberg Discovery cannot be held responsible for any negative consequences of the anti-fouling paint.
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Installing the transducer Procedure Clean the transducer thoroughly. Make sure that you remove all oil grease residues, as well as salt and other contamination. Allow the transducer surface to dry. Abrade the transducer surface using a sanding paper with 240 inch grit size. Do not exceed a surface roughness (R ) of 35 microns as this can influence the transducer performance.
EM2042 Installation Manual Approved anti-fouling paints The list of approved anti-fouling paints can be found on our website. Always refer to the manufacturer's documentation and data sheets for a complete procedure and for relevant safety information. Online information • https://www.kongsberg.com/anti-fouling-paints...
Installing the EM2042 system hardware units Installing the EM2042 system hardware units Topics Installing the Processing Unit, page 76 Installing the Portable Processing Unit, page 82 Installing the Hydrographic Work Station, page 85 110-0003725/B...
Installing the EM2042 system hardware units Installing the Processing Unit The Processing Unit is designed to be installed in a 19" rack. A suitable location for the Processing Unit must be defined prior to installation. Prerequisites You must be equipped with a standard set of tools. This tool set must comprise the normal tools for electronic and electromechanical tasks.
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EM2042 Installation Manual Mount the Processing Unit using four bolts through the front panel. The mounting bolts and nuts are supplied with the unit. Note We strongly advise that you provide additional support for the Processing Unit, for example by using a standard component shelf suitable for the 19 “...
Installing the EM2042 system hardware units Processing Unit rear panel description The rear panel of the Processing Unit holds all the connectors used to communicate with external devices and the power input socket. It also holds a fuse for the power input.
The Processing Unit has two fan units for cooling purposes. E. Dust filter Power supply One power supply unit is used in the EM2042 Processing Unit for supply of 5, 24 and 48 VDC. The Excelsys XLB power supply is located inside the Processing Unit, and is not visible from the outside.
Installing the EM2042 system hardware units CBMF board - dip switch setting The dip switch setting on the CBMF board has to be correct. All the dip switches on all the CBMF boards in the Processing Unit should be set to OFF.
Portable Processing Unit front panel description, page 83 Portable Processing Unit overview The EM2042 Processing Unit is available in a portable splash proof IP67 rated version. The Portable Processing Unit is a ruggedized IP67 (unmated and mated) version of the standard Processing unit that runs on 24 VDC (18-36VDC).
Installing the EM2042 system hardware units Portable Processing Unit front panel description The front panel of the Portable Processing Unit holds all the connectors used to communicate with external devices and the power input socket. TX, TRX , TRX Transducer cable input SeaPath Ant.
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EM2042 Installation Manual Data in External data input over Ethernet including attitude velocity Workstation Hydrographic Work Station input DGNSS in Input for GNSS corrections 1PPS - one pulse per second input signal used to synchronise the internal clock in the Processing Unit M.
The Hydrographic Work Station is based on a commercial design. Due to the constant development of new computer parts, older parts are no longer manufactured. This means that the computer type used with the EM2042 system changes from time to time.
Drawings are generally not provided for standard commercial cables. Cables fall into three categories. System cables System cables are provided by Kongsberg Discovery as a part of the delivery. Shipyard cables Shipyard cables must be provided by the shipyard doing the installation, or the shipowner.
Cable plan – Hydrographic Work Station, page 99 About the cable plans Due to its modular design, the EM2042 system can be set up in a variety of configurations. To illustrate the variety of configurations, the following basic cable plans are provided.
A. Processing Unit (PU) B. Transmit Transducer (TX) C. Receive Transducer (RX) Cables identified with an asterisk (*) are system cables. These cables are supplied with the EM2042 delivery. Related topics Processing Unit rear panel description, page 79 List of...
EM2042 Installation Manual Cable plan – Processing Unit – Single RX – MiniMRU – Seapath Cable plan showing a Processing Unit with single RX, using the embedded MiniMRU and Seapath 130 navigation system. Note If you have a system with one CBMF board, ignore board number two and cable C36-2.
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Cable layout and interconnections Cables identified with an asterisk (*) are system cables. These cables are supplied with the EM2042 delivery. 110-0003725/B...
EM2042 Installation Manual Cable plan – Processing Unit – Dual RX Cable plan showing a Processing Unit with dual RX. C29-C32 C10* PMC/XMC1 PMC/XMC2 CONSOLE 48VDC OUT Port 1 Port 2 Port 3 Port 4 ETH1 CBMF 2 C27* GbE1...
C36-2* C26* C36-1* C25* C37-2* C10* C37-1* C38* C39* (CD020112_100_025) A. Processing Unit (PU) B. Transmit Transducer (TX) C. Receive Transducer (RX) Cables identified with an asterisk (*) are system cables. These cables are supplied with the EM2042 delivery. 110-0003725/B...
EM2042 Installation Manual Cable plan – Processing Unit – Dual TX Cable plan showing a Processing Unit with dual TX. C29-C32 C10* PMC/XMC1 PMC/XMC2 CONSOLE 48VDC OUT Port 1 Port 2 Port 3 Port 4 ETH1 CBMF 2 C27* GbE1...
C26* C36-2* C25* C36-1* C10* C37-1* C37-2* C38-2* C38-1* (CD020112_100_026) A. Processing Unit (PU) B. Transmit Transducer (TX) C. Receive Transducer (RX) Cables identified with an asterisk (*) are system cables. These cables are supplied with the EM2042 delivery. 110-0003725/B...
EM2042 Installation Manual Cable plan – Portable Processing Unit – Single RX Cable plan showing a Portable Processing Unit with single RX. C10* DGNSS In Workstation Data in POWER Seapath Ant. Seapath MRU COM1 COM2 SYNC 18-36VDC C25* C37* C38* (CD020112_100_050) A.
A. Portable Processing Unit (PPU) B. Transmit Transducer (TX) C. Receive Transducer (RX) Cables identified with an asterisk (*) are system cables. These cables are supplied with the EM2042 delivery. Related topics Portable Processing Unit front panel description, page 83...
EM2042 Installation Manual Cable plan – Portable Processing Unit – Dual TX Cable plan showing a Portable Processing Unit with dual TX. C10* DGNSS In Workstation Data in POWER 18-36VDC Seapath Ant. Seapath MRU COM1 COM2 SYNC C25* C37-1* C37-2*...
The number of displays depend on the computer model used. Computer keyboard D. Computer mouse or trackball Cables identified with an asterisk (*) are system or commercial cables. These cables are supplied with the EM2042 delivery. Related topics List of cables, page 100...
EM2042 Installation Manual List of cables A set of cables is required to connect the system units to each other, and to the relevant power source(s). Cable Signal From/To Minimum requirements Video cable From Hydrographic Work Station to display This is a commercial cable. The display cable is often physically attached to the display, and terminated in the “computer end”...
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Cable layout and interconnections Cable Signal From/To Minimum requirements Serial cable From DGNSS provider to Processing Unit. Input for correction services. See Seapath 130 manual for supported solutions. RS-232 serial line used for DGNSS input, page 124 RS-422 serial line used for DGNSS input, page 125 Seapath antenna...
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Cat 5e STP (Shielded Twisted Pair) quality or better. Using cables with lower bandwidth capacity will reduce performance. The EM2042 system is often a part of a project delivery. For such deliveries, specific project cable drawings are established to show all the main cables, and how the various products are connected.
The Processing Unit has a 1PPS (one pulse per second) input for clock synchronization. This is a generic photo. The CBMF board used by the EM2042 may look slightly different due to minor design changes on the protective lid and/or the front panel.
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EM2042 Installation Manual Two examples are shown to clarify. 4.5V - 1.2V(U ) »10mA 330W • Using +4.5 V input signal the input current will be as required (~10 mA). No additional resistance required. 10.8 12V - 1.2V(U ) =1080W 10mA 0.010...
The Processing Unit is has a connection for interface to an external synchronization system. This is a generic photo. The CBMF board used by the EM2042 may look slightly different due to minor design changes on the protective lid and/or the front panel.
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EM2042 is transmitting TRIG IN Trigger in - Input to Optical isolated input High EM2042 enabling it to transmit Note To avoid ground loops and damage of the electronics caused by external connections, all connections are optically isolated. Optically isolated input signals...
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Cable layout and interconnections 12V - 1.2V(U ) 10.8 =1080W 10mA 0.010 R =1080-330=750 • An added resistor of 750 Ω and minimum 0.1 W must be used. Optically isolated output signals A. Processing Unit output circuitry B. External power C.
Clock synchronization (1PPS) using a coax cable, page 113 External synchronization cable, page 113 K-Sync interface to EM2042 Processing Unit, page 115 Interface to Remote Control Unit for external synchronisation, page 117 K-Sync interface to Remote Control Unit, page 118...
Cable layout and interconnections RS-232 serial line using three wires and RJ45 connector An RS-232 serial line connection is a common way to connect the EM2042 system to external devices. GROUND GROUND A. Local connection Pin 8 RJ45 connector B. Connection on remote device...
EM2042 Installation Manual RS-422 serial line using five wires and RJ45 connector An RS-422 serial line connection is a common way to connect the EM2042 system to external devices. An RS-422 serial line connection can transmit data at rates as high as 10 million bits per second, and may be sent on cables as long as 1500 meters.
Cable layout and interconnections Serial adapter - D-sub to RJ45 connector You can use an adapter if you need to connect a serial cable with a D-sub connector to the Processing Unit. The Processing Unit has four serial ports with RJ45 connectors. The ports can be configured to be RS-232 or RS-422.
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EM2042 Installation Manual Wiring - RS-422 BLUE TXD- RXD- ORANGE TXD+ RXD+ TXD+ TXD+ BLACK GROUND GROUND GROUND TXD- GREEN GROUND TXD+ TXD- TXD- YELLOW RXD- RXD+ RXD+ BROWN RXD+ RXD- RXD- WHITE (CD0801_007_004) A. Processing Unit (PU) - RJ45 connector B.
RTS OUT - (CD0806_701_003) A. Local connection The connector is RJ45 type. Note Pin 3 and 6 is used by Kongsberg Discovery only. B. Connection on remote device Unless otherwise specified, this cable must be provided by the installation shipyard. 110-0003725/B...
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EM2042 Installation Manual Minimum cable requirements • : 2 x 3 x 0.2 mm Conductors • : Overall braided Screen • : 30 V Voltage • : Defined by the plugs and/or the cable gland Maximum outer diameter We recommend using a shielded CAT-6A quality or better cable.
TRIG IN Trigger in – Input from external device, active while the device is transmitting GROUND Mandatory – connected to pin 2 inside the module Not used Note Pin 3 and 6 is used by Kongsberg Discovery only. 110-0003725/B...
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EM2042 Installation Manual Each IO Module in the K-Sync Synchronization Unit provides six connectors and a configuration board for physical adjustments of the communication parameters. Connectors 1 through 6 as indicated by the arrows. Note that each of the two connector elements can be pulled out of the IO Module for easy access.
Pin 3 and 6 is used by Kongsberg Discovery only. B. Connections in the Remote Control Unit (K-Rem) Unless otherwise specified, this cable must be provided by the installation shipyard. The Remote Control Unit is not a standard part of the EM2042 delivery. Minimum cable requirements •...
The Remote Control Unit is called K-Rem. It is prepared for remote control and interface to an external synchronization system up to four Kongsberg echo sounders. 25/38...
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Note that each of the two connector elements can be pulled out of the IO Module for easy access. Unless otherwise specified, this cable must be provided by the installation shipyard. The Remote Control Unit is not a standard part of the EM2042 delivery. Minimum cable requirements •...
EM2042 Installation Manual Remote control The Processing Unit can be switched on/off with a remote switch. This switch is connected to a 9-pin D-sub connector on the Processing Unit. A. Local connection, male 9-pin D- sub connector B. Connection to remote lamp and...
Cable layout and interconnections Remote Control using K-Rem The Processing Unit can be switched on/off with a remote switch. This switch is connected to a 9-pin D-sub connector on the Processing Unit. A dedicated junction box with on/off switches and light indication has been designed for this purpose (K-Rem). STANDBY 12 V STANDBY 12 V STANDBY GND...
EM2042 Installation Manual Dummy plug for not using remote control The Processing Unit can be switched on/off with a remote switch. If remote control is not used, the enclosed remote control dummy plug has to be inserted in the Remote Control connector in the Processing Unit.
Cable layout and interconnections DC Power cable This cable is used to connect the Portable Processing Unit to DC power supply. The cable is delivered with the Portable Processing Unit. 3000.0 6.00 22.2 (CD0806_701_031) A. Local connection Amphenol LTW PWC-03AFFM-LL7A03 BLACK B.
EM2042 Installation Manual RS-232 serial line used for DGNSS input The EM2042 Portable Processing Unit has a dedicated interface for GNSS correction using RS-422 or RS-232 serial communication. GROUND RX (INPUT) TX (OUTPUT) (CD0801_003_005) A. Local connection RJ45 connector Pin 8 B.
Cable layout and interconnections RS-422 serial line used for DGNSS input The EM2042 Portable Processing Unit has a dedicated interface for GNSS correction using RS-422 or RS-232 serial communication. RXA (INPUT) GROUND RXB (INPUT) TXA (OUTPUT) TXB (OUTPUT) (CD0801_004_007) A. Local connection...
EM2042 Installation Manual Seapath antenna interface cable - with plug The Portable Processing Unit can be connected to a Seapath 130 antenna with a dedicated cable. The cable is delivered with the Seapath 130 unit. 15000±100 Cable Part# Revision Prod week/Year...
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Cable layout and interconnections • Minimum bend radius: 10 x diameter • Conductors: 11 twisted pairs, 26 AWG • Provided by Amphenol with soldered connector UL2464 26AWG * 11 Pairs+Drain+AL.Mylar PVC Jacket UV Resistant • 22pin 2 ethernet TPs, 2 power conductors, 12 serial com leads (4xRS422), 4 1PPS leads and 1 screen (CD090505_001_001) •...
EM2042 Installation Manual Antenna interface cable The Portable Processing Unit can be connected to a Seapath antenna with a dedicated cable. The cable is delivered with the Portable Processing Unit. 15000±100 Cable Part# Revision Prod week/Year (CD0806_701_021) A. Local connection, Amphenol LTW DU-22BFFA-SL7000 B.
Cable layout and interconnections Seapath MRU interface cable The Portable Processing Unit can be connected to a Seapath Motion Reference Unit with a dedicated cable. The cable is delivered with the Seapath 130 system. 15000 ±100 300 ±50 Cable Part# Revision Prod week/Year (CD0806_701_023) PAIR 1 WHITE/ORANGE...
Receive Transducer cable The transducer is connected to the Processing Unit with a special cable. This cable is supplied with the EM2042 delivery. Several versions of this cable are available, with different lengths and with straight or angled connector in the transducer end.
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• Weight in sea water: 69 kg/km nominal • Depth rating: 6000 metres • Operating temperature: -20 - 70°C Important: Correct handling of the underwater connectors is very important to avoid any leakage and corrosion problems to the EM2042 transducers. 110-0003725/B...
Receive transducer cable - Portable Processing Unit The transducer is connected to the Processing Unit with a special cable. This cable is supplied with the EM2042 delivery. Several versions of this cable are available, with different lengths and with straight or angled connector in the transducer end.
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• Weight in sea water: 69 kg/km nominal • Depth rating: 6000 metres • Operating temperature: -20 - 70°C Important: Correct handling of the underwater connectors is very important to avoid any leakage and corrosion problems to the EM2042 transducers. 110-0003725/B...
EM2042 Installation Manual RX to TX transducer cable The transmit transducer must be connected to the receive transducer for synchronization and power. This cable is supplied with the EM2042 delivery. All measurements in mm. The drawing is not in scale.
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Cable layout and interconnections • Operating temperature: -20 - 70°C Important: Correct handling of the underwater connectors is very important to avoid any leakage and corrosion problems to the EM2042 transducers. 110-0003725/B...
EM2042 Installation Manual TX to RX2 transducer cable In a dual RX system, receive transducer number 2 has to be connected to the transmit transducer. This cable is supplied with the EM2042 delivery. 1000 All measurements in mm. The drawing is not in scale.
Cable layout and interconnections Overview of EM 2042 transducer cables Notes: List of EM2042 Transducer cables with part numbers. To be removed from finished manual. !!!! ???? Standard- and OEM PU Cables - Straight Plugs • V1101 RX Transducer Cable for std PU and OEM PU, 8m •...
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EM2042 Installation Manual TX-RX Sync Cables 110-0052626 TX-RX Sync Cable, 0.8m for EM 2042 SRX (Cable P4TP22#4C18#OS) 110-0050279 TX-RX Sync Cable for EM 2042 SRX portable mounting plate (bracket) 110-0027606 TX-RX Sync Cable, 1.0m for EM 2042 Dual RX (Cable P2TSP20#)
Note that the cables must not be installed in the vicinity of high-power supplies and cables, antenna cables or other possible sources of interference. Kongsberg recommends that there is minimal bending of cables from transducers to operating room.
EM2042 Installation Manual Handling of underwater connectors Correct handling of the underwater connectors is very important to avoid any leakage and corrosion problems to the EM2042 transducers. Important: You must follow these instructions carefully to ensure correct use of your SubConn ®...
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Cable layout and interconnections After greasing, fully mate the male and female connector and remove any excess grease from the connector joint. The recommendations from the manufacturer of the underwater connectors may be subject to change without prior notice. Please refer to the manufacturers website for updated information.
EM2042 Installation Manual Basic cable requirements It is very important that all systems cables are installed correctly. All cables must be properly supported and protected, and all relevant precautions must be made to prevent unwanted noise. Topics Cable trays, page 142...
Cable layout and interconnections Cables containing insulation materials with different maximum-rated conductor temperatures should not be bunched together (that is, in a common clip, gland, conduit or duct). When this is impractical, the cables must be carefully arranged such that the maximum temperature expected in any cable in the group is within the specifications of the lowest-rated cable.
EM2042 Installation Manual Grounding of system cables All metallic cable coverings (armour, metallic sheathing and other protection) must be electrically connected to the vessel's hull at both ends except in the case of final sub-circuits where they should be connected at the supply end only.
There are many different types of cable gland on the market. The cable glands are not supplied with the system. Note Even though the cabinets from Kongsberg Discovery may be prepared for specific types of cable glands, the installation shipyard will be responsible for selecting cable gland types and installing them.
There are many different types of cable gland on the market. This procedure describes the types used (now and previously) as standard in the units manufactured by Kongsberg Discovery. Even though the cabinets from Kongsberg Discovery may be prepared for specific types, the installation shipyard will be responsible for selecting cable gland types and installing them.
Cable layout and interconnections to the terminal block(s) inside the cabinet. Add 20 cm, and remove the excess cable. If the cable has not been installed in conduits: Measure the maximum length of wire required to reach from the cable gland to the terminal block(s) inside the cabinet.
EM2042 Installation Manual Perform a relevant system test to ensure the installation has been made successfully. Using multi-diameter cable sealing Cable sealing systems are available from several manufacturers, and multi-diameter types are becoming increasingly popular due to their ease of use.
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Cable layout and interconnections Illustration: Roxtec steps (Image from Roxtec website) The Roxtec system is available with a large number of various modules and compression units. The system complies with current screening and EMC requirements. Procedure Cut an opening in the structure (bulkhead, cabinet etc) you wish to penetrate.
Dimensional surveying and alignment About dimensional surveying and alignment The EM2042 Multibeam echo sounder is a precision instrument for high quality data collection. To obtain precision data that are both detailed and correct, it is necessary to align the transducer, measure the location and offset of each sensor in relation to the vessel’s coordinate system, and calibrate the complete system prior to use.
EM2042 Installation Manual The information provided by the dimensional survey is entered into the EM2042 software as installation parameters. Note Determining the relative positions and orientations of the sensors and the transducer with high accuracy is important. This requires professional surveying done by qualified and trained personnel using proven equipment and methods for maritime dimensional surveying.
Dimensional surveying and alignment Calibration Calibration surveys are required during the sea trials. The calibration procedures are provided in the relevant end user documentation. We strongly recommend that calibration surveys are done at regular intervals. As a minimum, calibration must be done prior to any large and/or important survey. The calibration process is described in detail in the Seafloor Information System (SIS) Operator Manual.
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EM2042 Installation Manual In order to establish a system to measure the relative distance between sensors, a virtual coordinate system is established. This coordinate system uses three vectors; X, Y and Z. A. The X-axis is the longitudinal direction of the (CD010101_300_001) vessel, and in parallel with the deck.
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Dimensional surveying and alignment Defining the physical location of each sensor By means of the vessel coordinate system, the physical location of every sensor can be defined using three numerical values for X, Y and Z. These values must define the vertical and horizontal distances from a single reference point;...
EM2042 Installation Manual Interface specifications - Processing Unit - KMall format The EM2042 system will interface with peripheral systems and sensors using standard and/or proprietary datagram formats. This is a description of available datagram formats for EM multibeams using the KMall format.
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Technical specifications Supported datagram formats for motion information The EM2042 system supports the following datagram format from a motion sensor: • Kongsberg EM Attitude 3000 The Kongsberg EM Attitude 3000 is a proprietary datagram format created by Kongsberg Discovery for use with digital motion sensors. It holds roll, pitch, heave and heading information.
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EM2042 Installation Manual See this page: https://www.kongsbergdiscovery.online/sis/kmall/html. 110-0003725/B...
Sound velocity sensors can be interfaced directly to the Processing Unit and configured in K-Controller or interfaced to the Hydrographic Work Station and configured in SIS 5. The EM2042 supports the following datagram format from a sound velocity sensor. From SIS 5.9 From SIS 5.9 the SVPEditor accepts native formats from Valeport and AML, making it...
External sensors requirements The external sensors must fulfil these requirements to achieve the specified performance for the EM2042 system. Check with your sensor supplier if the sensor accuracy requirements are met and the required formats are supported. Sensor accuracy - Minimum requirements Velocity sensor accuracy requirements •...
Interface specifications - Hydrographic Work Station - KMall format The EM2042 system will interface with peripheral systems and sensors using standard and/or proprietary datagram formats. This is a description of available datagram formats for EM multibeams using the KMall format.
EM2042 Installation Manual Weights and outline dimensions These weights and outline dimension characteristics summarize the physical properties of the EM2042 system. Topics Transducer – weight and outline dimensions, page 178 Processing Unit – weight and outline dimensions, page 181 Portable Processing Unit – weight and outline dimensions, page 181 OEM Processing Unit –...
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Technical specifications Receive transducer • Outline dimensions • : 340 mm Length • : 122.5 mm Width • : 120 mm Height • Weight • Weight in air: 6.1 kg • Weight in water: 1.6 kg Weight depends on transducer configuration: Weight with MRU: Add 0.5 kg Weight with SVP: Add 0.3 kg in air and 0.2 kg in water Transducer mounting plate - 0.4 degrees...
Technical specifications Processing Unit – weight and outline dimensions • : Kongsberg EM PU Make and model • Outline dimensions • : 424 mm Depth • : 482.5 mm (19" rack) Width • : 88.6 mm (2U) Height • : 10.5 kg...
EM2042 Installation Manual Power requirements These power characteristics summarize the supply power requirements for the EM2042 Multibeam echo sounder. Topics Transducer – power requirements, page 182 Processing Unit – power requirements, page 183 Portable Processing Unit – power requirements, page 183 Processing Unit with Transducer –...
Technical specifications Processing Unit – power requirements • : Kongsberg EM PU Make and model • : 100 to 250 VAC, 47 to 63 Hz Voltage requirement • Maximum power consumption • : 115 W With one CBMF board (without transducer) •...
• Single RX Dual Swath systems require one CBMF boards • Dual RX Single Swath systems require two CBMF boards • Dual RX Dual Swath systems require two CBMF boards EM2042 0.7x0.7 degrees - Single RX - Single/Dual Swath - Shallow waters Component Maximum power consumption AUV or Portable Processing Unit with 1xCBMF 0.7 degrees Receiver...
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Technical specifications EM2042 0.4x0.7 degrees - Dual RX - Single/Dual Swath - Deep waters Component Maximum power consumption Standard Processing unit with 2xCBMF 0.7 degrees Receiver (w/ embedded MRU and SV sensor) 0.7 degrees Receiver 0.4 degrees Transmitter sending FM pulses...
Technical specifications Portable Processing Unit – environmental requirements • : Kongsberg EM PPU Make and model • : 0 - 50°C Operating temperature • : -30 - 70°C Storage temperature • : IP67 Ingress protection (IP) code • Certificates Designed to meet •...
EM2042 Installation Manual Alignment specifications These alignment specifications summarize the alignment accuracy requirements of the EM2042 system. Note The following accuracy requirements are minimum requirements. Higher accuracy will provide better results and should therefore always be aimed at. Transducer alignment accuracy •...
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Technical specifications Heading sensor alignment accuracy • : ± 0.1 degrees Heading Position sensor alignment accuracy • : ± 0.05 m Position (x) • : ± 0.05 m Position (y) • : ± 0.005 m Position (z) Waterline determination accuracy •...
The Hydrographic Work Station is based on a commercial design. Due to the constant development of new computer parts, older parts are no longer manufactured. This means that the computer type used with the EM2042 system changes from time to time.
The phrase box is used to describe all kinds of cases, wooden or cardboard boxes etc used to hold the unit. Topics Transporting Kongsberg Discovery equipment, page 192 Lifting units and transportation boxes, page 194 Inspection of units and transportation boxes after arrival, page 196...
EM2042 Installation Manual Transporting Kongsberg Discovery equipment Unless otherwise stated in the accompanying documentation, electronic, electromechanical and mechanical units supplied by Kongsberg Discovery can be only transported using methods approved for delicate and fragile equipment. Prerequisites Transportation methods approved for delicate equipment includes transportation by road, rail, air or sea.
Equipment handling Handle all boxes and units with care. Note Due to the nature of Kongsberg Discovery’s products, and the extensive use of delicate electronic parts, all units and boxes must be regarded and handled as fragile equipment. Related tasks...
EM2042 Installation Manual Lifting units and transportation boxes Some of the boxes used to hold equipment units may be heavy. Use caution when lifting. Prerequisites Units and boxes may be heavy. Make sure that you have the necessary equipment required for lifting heavy items. Persons using the lifting equipment must be skilled and have the relevant certificate(s).
Equipment handling Handle all units and boxes with care. Note Due to the nature of Kongsberg Discovery’s products, and the extensive use of delicate electronic parts, all units and boxes must be regarded and handled as fragile equipment. Related tasks...
Describe the damage, and collect photographic evidence if possible. Return the inspection report to Kongsberg Discovery as soon as possible. If units are not damaged, check the humidity absorbing material. If required, dry or replace the bags, then re-pack the unit(s) according to the packing instructions.
Equipment handling Specifications for storage prior to installation or Whenever a system, a unit or a spare part has been delivered, it may be subjected to long-time storage before installation and use. You must meet certain specifications during this storage period. It is essential that you preserve and store the equipment so that it does not threaten health, environment or personal injury.
EM2042 Installation Manual 12. Boxes must not be subjected to excessive shock and vibration. 13. If the unit contained in a box holds normal batteries, these may have been disconnected/isolated before the unit was packed. These must only be reconnected before the installation starts. Units containing batteries are marked.
If a unit has been damaged, prepare an inspection report stating the condition of the unit and actions taken. Describe the damage, and collect photographic evidence if possible. Return the inspection report to Kongsberg Discovery as soon as possible. 110-0003725/B...
EM2042 Installation Manual Place the box on a stable work bench or on the floor with the top of the box facing upwards. In the absence of other instructions, always open the top of the carton first. The contents of the box will normally have been lowered into the carton from above, so this will usually be the easiest route to follow.
Equipment handling Place it in a stable position on the floor/work bench. Inspect the unit for visual damage. Remove any packing material that may be inside the unit. Collect and keep the relevant user manuals and/or documents provided with the unit.
EM2042 Installation Manual Describe the damage, and collect photographic evidence if possible. Return the inspection report to Kongsberg Discovery as soon as possible. Assuming all is well, open the bag and remove the unit. Take out and keep the documentation.
Equipment handling • Do not step on the transducer cable. • Do not handle the transducer roughly. Avoid impacts. • Do not expose the transducer to direct sunlight or excessive heat. • Do not use high-pressure water, sandblasting, metal tools or strong solvents to clean the transducer face.
Do not break the seal to open a circuit board package before the board is to be used. If the board package is returned to Kongsberg Discovery with the seal broken, we will assume that the unit has been used and you will be billed accordingly.
Equipment handling Note Unless otherwise specified, transducers and hydrophones must not be stored in temperatures below −10°C and above +50°C. Packing instructions for storage or shipping If a unit needs to be packed for storage or shipment, you must whenever possible use its original packing material and/or crate.
Related tasks Transporting Kongsberg Discovery equipment, page 192 Lifting units and transportation boxes, page 194 Unpacking and handling printed circuit boards and electronic modules, page 210 Returning a printed circuit board or an electronic module to Kongsberg Discovery, page 212 110-0003725/B...
Use extreme care with delicate circuit boards and units. Make sure that these are not damaged in the process. Wipe clean all exposed cables, and check for damage. If a cable shows signs of wear or ageing, contact Kongsberg Discovery for advice. 110-0003725/B...
EM2042 Installation Manual Check if the unit contains batteries. If the unit contains batteries, these may discharge slowly during storage. If the unit is to be stored for an extended period, disconnect or remove all internal batteries. A suitable piece of insulating material can be placed between the battery and the electrical contacts to prevent electrical discharge.
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Clean damaged or suspect areas, prepare and preserve these areas using the correct preservation mediums. Wipe clean all exposed cables, and check for damage. If a cable shows signs of wear or ageing, contact Kongsberg Discovery for advice. Secure and protect loose parts (shock absorbers, plug and sockets, protruding objects etc).
Topics Unpacking and handling printed circuit boards and electronic modules, page 210 Returning a printed circuit board or an electronic module to Kongsberg Discovery, page 212 About Electrostatic Discharge (ESD), page 213 Unpacking and handling printed circuit boards and electronic modules Circuit boards and electronic modules are delicate items.
If a unit has been damaged, prepare an inspection report stating the condition of the unit and actions taken. Describe the damage, and collect photographic evidence if possible. Return the inspection report to Kongsberg Discovery as soon as possible. Assuming all is well, open the bag and remove the unit. Note Do not break the seal to open a printed circuit board, an electronic module or a unit before it shall be used.
212 Returning a printed circuit board or an electronic module to Kongsberg Discovery If you wish to return a printed circuit board or an electronic module to Kongsberg Discovery - either operational or defective - certain rules apply. Prerequisites For correct and safe handling of printed circuit boards and electronic modules, you need a suitable working area.
Equipment handling Note DO NOT use a standard plastic bag, such as a commercial bubble wrap. Fill in all the necessary information on the applicable form, or provide relevant information in a document. Place the documentation inside the bag. Seal the antistatic packing bag. Place the circuit board or module in a suitable transport container, and secure it for shipping.
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EM2042 Installation Manual an electrostatic field. The passing of a charge through an electronic device can cause local overheating, and it can also "puncture" insulating layers within the structure of the device. This may deposit a conductive residue of the vaporized metal on the device, and thus create a short circuit.
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Equipment handling Related tasks Packing instructions for storage or shipping, page 205 Unpacking and handling printed circuit boards and electronic modules, page 210 Returning a printed circuit board or an electronic module to Kongsberg Discovery, page 212 110-0003725/B...
- must take place according to national and international rules and regulations. Observe the relevant Waste Electrical and Electronic Equipment (WEEE) regulations. Product recycling service Kongsberg Discovery offers a product recycling service. See our website for more information. • https://www.kongsberg.com/maritime/services/product-recycling We accept all our products for recycling.
Observe and follow these safety precautions during all installation and maintenance work. WARNING The EM2042 system operates on 230 VAC at 50/60 Hz. This voltage is lethal! You must never work alone on high-voltage equipment! You must always turn off all power before installing or maintaining the EM2042 system.
EM2042 Index alignment specifications (continued) Numerics positioning system ........189 1PPS transducer ..........188 clock synchronization .........113 waterline ..........189 connection ..........113 alternative origin ..........vessel coordinate system ......154 ambient noise ..........about ............acoustic noise ........... 42 acoustic noise ...........
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Installation Manual cable grounding ..........cleaning (continued) requirements .......... 144 an electronic unit ........207 cable identification ........... clock synchronization ........requirements .......... 144 1 pulse per second (1PPS) ......113 cable plan ............connectors ..........103 Hydrographic Work Station ......99 signal characteristics .........
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