SAL_T2_Installation_Manual.pdf

Consilium Marine & Safety AB

SAL T2

and

SAL T2+

Speed Log System Manual

Art icle No.: 702270L1 é C o n s il iu m çConsilium SAL T2 / SAL T2+ Manual Art. No. 702271L1

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Table of Contents SAL T-series

Section Description Doc. ID

1 Introduction 702271 2 Technical Description 702273 3 Technical Specification 702274 4 Installation of Transducer and Bottom Parts 70161 8 5 Installation of Electronics Unit 702313 6 Log Processing Unit LPU2 704531 7 SAL SD4 Serial Digital Display 704005 8 Analogue Indicator SIA-2-8 701402 9 SAL BTU (Bottom Track Unit);

Menu System 703258

10 SAL WTU (Water Track Unit) Assembly;

Technical Manual and Menu System

702314

11 IEC 61162 / NMEA 0183 User Guide 700164 12 Harbour Acceptance Test 703254 13 Calibration and Sea Acceptance Test 703255 14 SAL T2 System drawings 703270 15 SAL T2 System MDOC and Certificates 702363 16 SAL T2+ System description, labels and drawings 703280

17 SAL T2+ System MDOC and Certificates 702364 18 SAL T2 and SAL T2+ Manual - Annex

I – Equipment recycling II – Energy saving III – Equipment approval labelling

702358

19 Optional and order specific pages N/A

20 Installation and service reports N/A

1. Introduction

The purpose of this manual is to fulfil the needs for normal installation, commissioning, every-day use and also to give enough guidance for ship’s crew and local service agents to pinpoint a faulty sub-unit.

Liability All equipment described in this manual is designed for use on board ships to fulfil requirements specified in various IMO documents.

However, equipment may sometimes fail or work outside its performance specification due to component malfunction or depending on other factors.

Consilium Marine & Safety will not take any responsibility if this equipment is used in such a way that it’s normal or abnormal function causes damage or creates situations that can be dangerous.

All specifications given in this manual are subject to changes without prior notice!

SAL T2 / SAL T2+ Acoustic Correlation Dual Speed Lo g

System Description

The system measures one-axis relative speed as well as two-axis bottom track speed in a combined transducer. The SAL T2 / SAL T2+ systems are based on the SAL T-series speed log. The designation “SAL T-series” is used in documentation that is common for all versions of the speed logs.

In the SAL T2+ system the speed log device for STW (Speed Through the Water) is separated from the speed log device for SOG (Speed Over the Ground).

The data obtained from the SAL T2 and SAL T2+ are:

a) Longitudinal bottom track speed (= SOG longitudinal)

b) Transverse bottom track speed (= SOG transverse)

c) Longitudinal water track speed (= STW)

d) Docking log (if an optional Rate-of-Turn Gyro is connected to the system)

e) Depth information (= DPT)

LPU2 - Log Processing Unit The LPU2 is mounted on the bridge and receives the NMEA message from the ELC. The LPU2 has various options to perform message conversion and calculations and has also a variety of inputs for taking data from other units. Outputs available are serial (NMEA), relay contacts, opto-couplers and analogue output. The LPU2 can also take data from a connected turn-rate gyro. If the docking log option in the LPU2 is enabled, the data from the log and the gyro are combined to create also docking log information that can be used by the docking log display SD4-5 .

SD4 - Serial Digital Indicators The SAL SD4-series of indicators are versatile instruments used primarily as a display to indicate speed, distance and depth. It can also be used to remotely control such equipment, which is not easily accessible or has no user interface, for example a SAL speed log or SAL

LPU2.

TRU - Transducer The combined transducer is mounted in a sea valve arrangement suitable both for single and double bottom design. The transducer incorporates as standard a 30 metres cable for connection to the electronics unit (ELC). Both speeds and depth are measured with this single, combined transducer that is equipped with separate crystals for bottom track measurement (5 off) as well as for water track measurement (2 off).

1. Block diagrams

Block diagram for a typical SAL T2+ system:

Rate-of -Turn Gyro signal from external source to LPU2 adds docking log functionality.

Bridge Wing

SD4-5

Docking display

Option

Bridge Wing

SD4-5

Docking display

Option

Engine Control Room

SD4-2

Speed Log Display

Option

Wheelhouse

SD4-2

Master Display

STW Device

SD4-2

Speed Log Display

SOG Device

LPU2

Log Processing Unit

Bow

ELC

SAL T2+

Electronics Unit

Block diagram for a typical SAL T2, 2-axis configur ation:

Optional indicators on grey background.

Block diagram for a typical SAL T2, Docking Log con figuration:

Optional indicators on grey background.

Rate-of-Turn Gyro signal from external source.

2. List of a SAL T2 / SAL T2+ System

Standard items for a system

Unit number Name of unit Description 702200 or 702200-10

SAL T2 ELC

SAL T2+ ELC

Log main unit (ELC = Electronics Cabinet)

704500 LPU2 Log Processing Unit, second generation, required for docking log functionality

704400 or 704401

SAL T TRU-2-2 Transducer with 30m cable Transducer with 40m cable

5493300-00A MSSBSV H Mounting Set Single Bottom with Sea Valve 704042

704042

SD4-2

SD4-2

Serial Digital SOG/STW speed, total/trip distance.

Also used as a remote log control unit, “Speed Log Master Display”

Note! The SAL T2+ system must consist of at least two SD4-2 displays, one marked STW Device and one marked SOG Device. Each of these displays shall be connected according to SAL T2+ drawings in this manual.

Optional items for a system

Unit number Name of unit Description 704044 SD4-4 Serial Digital, general instrument 704045 SD4-5 Serial Digital SOG/STW, docking log display 704080 SD4 BMB Bulkhead mounting box SD4 704110 SD4EB Extension board SD4 704120 SD4ED External dimmer SD4 71-21049-17 SIA-2-8 AN.SPEED Analogue indicator, -8 +30kt 71-71091-00 EXT DIM TYPE SIA External dimmer for SIA analogue indicator 5493340-00A MSDBSV H Mounting Set Double Bottom w. Sea Valve (option) 71-19839-xx Connecting Tube For MSDBSV, xx=Length depending on installation

Text for spine of binder:

çConsilium SAL T2 and SAL T2+ Speed Log System Manual; Art. No. : 702270L1

SAL T-series Technical

Description Article No. 702273 o n s il çConsilium SAL T-series Technical Description Art No. 702273D0

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Contents:

1 PRINCIPLE OF OPERATION 3

2 SPEED OVER GROUND MEASUREMENT 3

2.1 Acoustic transmission/reception 3

2.2 Depth measurement 4

2.2.1 Seek mode 4

2.2.2 Lock mode 5

2.3 Speed measurement 5

2.3.1 Speckle pattern 6

2.3.2 Correlation technique 10

3 TRANSDUCER TRU-2-2 11

4 ELC - ELECTRONICS UNIT 12

4.1 BTU-PCB 14

4.2 WTU-Assy 14

4.3 Data transmission / reception 14

Revisions:

Date Version Author Comment 2003-04-24 A0 NE Created from 703251A3 2003-09-10 A1 RB WTU/RSC PCB and connection diagram 2003-10-15 A2 JKW/OM Corrected some picture and added the SAL T3

ELC number 2004-03-03 B0 HW Changed to be general for all T-series 2004-09-24 B1 UH WTU card added in electrical connection dwg.

2005-02-21 C0 JL Changed for T-M motherboard.

2007-09-18 C1 RB Added NMEA messages on serial ports (chapter

5.3) 2007-12-13 C2 HW Terminal 102/103 VDVLW message removed from table page 26 2008-02-08 C3 RB Updated picture on page 25 2009-03-10 C4 OM Correspond to IEC62288, SOG, STW… 2010-04-29 C5 OM Company name changed, corrections 2012-05-25 D0 JL Adapted to WTU – Assembly (rev F and later)

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1 Principle of operation The SAL T-Series Log system (incl. SAL T1, SAL T2, SAL T2s, SAL T2+, SAL T3 ) is actually two more or less independent log systems, one for sensing speed over ground (SOG), Bottom Track Unit, (BTU), and the other for sensing speed through water (STW), Water Track Unit (WTU – Assy.).

Although both sensor systems are based on correlation technique, sharing many common features, the principles are somewhat different. Accordingly, the WTU – Assy. Is described in its own document.

2 Speed over ground measurement

2.1 Acoustic transmission/reception

The correlation speed log uses acoustic waves in water. The transducer is mounted flush with the hull, see figure below. Waves are transmitted from the piezo-electric elements into the water, down to the sea-bed. The sea-bed reflects the signal back to the piezo-electric elements, which acts as receivers, when not used as transmitters. We use broad antenna lobes because we are not sensitive to lobe widths, compared to a system using Doppler technique.

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S1 S2

HullHull

Bottom track transmission

Piezo-electric elements

Projected bottom area

Acoustic beams from transmitting piezo-electric elements

Transducer

Ahead

The beam travels down to the sea bed with a velocity of close to 1500 m/s. This velocity is almost constant for different frequencies. If we have a calibrated depth meter, we may have to compensate for salinity, density and temperature differences. The SOG correlation speed logs operate at 150 kHz, giving a wavelength of 10 mm.

2.2 Depth measurement

The depth measurement is divided into two phases: first we seek the depth by transmitting a pulse and wait for the echo to return. Once the depth has been measured we use a locked loop to adjust the depth to correct value.

2.2.1 Seek mode

In the six predefined seek modes the log transmits a pulse. The pulse length varies between 0.3 and 67 ms corresponding to seek ranges from minimum depth 1 to maximum depth 400 meters.

After the transmit pulse the receiver is sampled at regular intervals. The echo will have the same length as the transmitted pulse. The log correlates the transmitted pulse with the echo to form an echo function. The peak of this function corresponds to the time it takes for the pulse to travel from the hull to the sea-bed and back. If a valid echo is found the log enters the depth lock mode.

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Depth seek mode

Transmit pulse

Echo signal

Sampling

2 * Depth / C

2.2.2 Lock mode

In the depth lock mode we use the known depth value to measure the depth more accurately.

The depth lock mode is divided into 9 cycles, see figure below. During cycle 1 a pulse is transmitted. The length of this pulse is equal to the time it takes for the wave to travel from the transducer to the sea bottom. During cycle 2 this signal travels back to the transducer. During cycle 3 the echo pulse is active on the transducer elements. The positive edge of the returned echo is locked to always come at start of cycle 3, se figure below.

Depth lock mode

Transmit pulse

Echo signal

Sampling

Depth lock

1 2 3 4 5 6 7 8 9 1

Speed measurement

If the edge comes too late, the pulse duration is lengthened, if it comes too early, the pulse duration is shortened.

During cycle 5 and 6 a second pulse is transmitted. This pulse is equal to the time the signal travels from the transducer to the sea-bed and back again. During cycle 7 and 8 the echo is used for speed measurement.

2.3 Speed measurement

The receiving sensor elements will see a speckle pattern. First we discuss this pattern, and then correlation technique to estimate the speed.

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2.3.1 Speckle pattern

A coherent beam is transmitted towards the sea-bed. This means that the signal has both intensity and phase information. When the signal is reflected back, the signal will be modulated both in amplitude and phase. Each reflector will give a phase and amplitude modulation of the signal. If the bottom has a depth variation larger than the wavelength (10 mm) it will give a random phase modulation. All reflectors will sum up in one position depending on the distance to that position, see figure below.

S1 S2

HullHull

Bottom track reception

Piezo-electric elements

Projected bottom area

Acoustic beams from reflecting objects in bottom back to

Transducer

Ahead piezo-electric elements

In some spots the reflectors will cancel each other, while in other spots they will support each other. The same effect is used in holography, where also both phase and amplitude information is used. Thus we get a "holographic pattern" on the hull of the ship with loud and silent spots. It can be shown that the size of a loud spot is typically the same as the transmitter area.

The receivers measure the intensity as they travel over this pattern. One such computer simulated pattern with only five reflectors can be seen in the figure below.

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This pattern may also be visualised as a map with valleys and mountains representing the intensity at the position, see figure below.

sigbel

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When the transducer is moved across this pattern the elements measure the intensity along the intersection of this map. Two sensors aligned with the motion may give the following result, see figure below.

0 20 40 60 80 100 120 s1 n s2 n n Figure: two identical signals with delay caused by displacement between sensors.

A complex sensor as the SAL TRU-2-2 will measure intensity along several intersections of the map. The figure below shows the difference at 45º and a 90º relative to the motion. The similarity decreases, and the signal time displacement decreases.

0 20 40 60 80 100 120 s1 n s2 n s3 n s4 n n The ship moves the transducer during both transmit and receive. This will be seen as a doubled speed of the speckle pattern during receive. The interference pattern will give signals with 100% modulation that are easy to detect. Side lobes give no false speed. The broad beam gives

10 (14) always some signal component back, compared to doppler using a narrow beam which may be missed if the ship is rolling. The interference pattern is also unaffected by salinity, temperature and density. A layer may give a signal component from that layer if it has time delay close to the bottom echo, but as long as the main signal comes from the bottom, this will be the main speed source.

2.3.2 Correlation technique

Correlation is a method of finding the similarity between signals. The definition we use is to calculate at what time difference between signal pairs the similarity is maximised. This time delay corresponds to the distance between the sensors. By dividing this distance by the time we get the speed.

In the "interpolation mode", when the time delay is larger than the maximum pulse length, we cannot calculate the speed directly. This limit is when the speed [in knots] multiplied with the depth [in metres] is less than 41. In this case signal statistics is used to estimate the speed.

Accuracy is lower in this mode.

The two axis log (SAL T2, SAL T3) calculates the velocity in six different directions and then weights them together to find the longitudinal and transversal component. The patented transducer configuration with only five elements gives the possibility to measure speed in all directions with a 30º resolution, see figure below.

s1 s2 s3 s4 s5

SAL 860 transducer configuration

Longitudinal

Transversal

Fig: SAL TRU-2-2, T2, T3 /860 transducer. Used measurement directions: 0º (s1–s2), +30º (s2– s4), -30º (s5–s4), +60º (s3–s2), -60º (s1–s3) and 90° (s5 - s2).

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3 Transducer TRU-2-2

The transducer is a highly refined product, containing piezoelectric sensor elements facing the water and containing some matching circuits to achieve good matching to the cable (30 m of cable is supplied as standard, option 40m).

122,00 mm

Transducer direction in centerline

( Front view of transducer head )

207,51 mm of ship, facing forward

As seen, the transducer elements are clearly divided into the five SOG elements and the two STW elements in a separate casing.

Electrically, each sensor element is connected via a matching transformer to a separately shielded twisted pair. For transmission with the low frequency SOG part, a separate transmit cable pair is used, that connects the signal to the three transducer elements used for transmission.

The positioning of the transducer is very important. The water flow below the transducer must not be turbulent or affected by skew water flows. Turbulent flow gives no common signal between the two STW channels.

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4 ELC - Electronics Unit The Electronics Unit is from the functional point of view divided into two more or less separated units: SOG unit (BTU; T2F, T2R and transmitter integrated on T-M board) and STW unit (WTU-Assy). Block diagram is shown below:

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4.1 BTU-PCB

The BTU-PCB unit consists of two boards T2F and T2R (one additional T2R in T3+), placed in a rack on the T2-M motherboard which also includes a power supply and an amplifier section for the transmit pulse.

T2F has the function to condition and amplify the signals received from the five piezo-electric elements in the transducer, T2R is the main processor board in the BT unit. The amplifier integrated on the T-M motherboard is used to amplify the transmit pulse which is generated by T2R.

4.2 WTU-Assy

The WTU – Assy. PCB consists of a double board assembly docked to the T-M motherboard in the same rack as the BTU-PCBs. The WTU PCB is powered from a separate power supply also included on the T2-M motherboard.

4.3 Data transmission / reception

Data is sent and received from the log as serial NMEA messages on standard IEC 61162-1 / NMEA (RS 422/485) output / input.

Serial NMEA messages used by the speed log are described in detail in Technical Document 700164, which is available from Consilium Navigation AB.

The following NMEA sentences are transmitted in a standard setup:

Serial port Function NMEA sentences transmitted NMEA0(TxBT) Terminal 102/103

This output carries basic information. Can be used by external users.

VDVBW, VDDPT

NMEA1(RxMain) Terminal 105/106

Main input. -

NMEA2(TxMain) Terminal 108/109

Main output, also containing additional information used internally in the Consilium speed log system.

VDVBW, VDDPT,

VDVLW, PSALS, PSALX

NMEA4(Tx) Terminal 114/115

Not Used.

NMEA5(Rx) Terminal 117/118

Not Used. -

NMEA6(TxWT) Terminal 120/121

Messages are generated in the WTU. Used as a redundancy output that will continue to operate also if the BT unit is malfunctioning.

VDVBW, VDDPT,

VDVLW, PSALS

Note that also other NMEA sentences than those mentioned above might be transmitted on any channel depending on setup and working mode.

NMEA-messages are also available through RS232 on two 9-pole D-sub-connector, one on T2R and one on WTU. It is used for data logging and software updates. Thus it is possible to read out information directly on an ordinary PC using for instance a terminal emulator program.

Technical

Specification Article No. 702274 o n s il çConsilium SAL T-Series Technical Specification Art No. 702274D0

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Abstract: Performance, environmental conditions and power requirements for the SAL T- Series speed log system

Contents:

1 GENERAL 4

2 PERFORMANCE 4

2.1 Principle of operation 4

2.1.1 STW (Speed Through the Water = relative speed) 4

2.1.2 SOG (Speed Over the Ground = true speed) 4

2.2 Accuracy of measurement 4

2.2.1 STW 4

2.2.2 SOG 4

2.2.3 Echo sounder properties (valid only for SAL T1, T3 & T3+) 5

2.3 Functional limitations 5

2.3.1 STW 5

2.3.2 SOG 5

2.3.3 Echo sounder (valid only for SAL T1, T3 & T3+) 5

3 ENVIRONMENTAL CONDITIONS 6

4 INTERFACES 6

4.1 Serial interface & sentences 6

4.1.1 LPU2 – Log Processing unit 6

4.1.2 ELC – Electronics Unit 6

4.1.3 ESD2 – Echo Sounder Display (only for SAL T1 / T3 / T3+) 6

4.1.4 SD4 – Serial Display (Speed Log Master Display) 6

4.2 Relays, opto-couplers and analogue outputs 7

5 CALIBRATION 7

6 POWER REQUIREMENTS AND DIMENSIONS 8

7 LIABILITY 8

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Date Version Author Comment 2002-04-04 A1 SFS Created from 703252 and 702274A0 2004-03-12 A2 HW Text changed from T2 to T-Series. Echo sounder added 2004-09-24 A3 RB/HW Editorial changes, WTU PCB 2005-08-04 A4 OM Added SD4 and Echo sounder alarm 2007-12-19 C0 OM/RB Changed LPU to LPU2, deleted SD1 and SD2, NMEA rev 2009-03-10 C1 OM Correspond to IEC62288, SOG, STW… 2010-04-29 C2 OM Corrections 2011-12-02 C3 STE/SGU Corrections and clarifications 2011-12-12 C4 OM Added dimensions and weight 2012-01-11 C5 STE Clarifications 2012-05-23 D0 JL Adapted to WTU Assembly (rev F and later)

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1 General The technical specification in this section deals with the SAL T-Series system, including the Transducer, Electronics unit, Log Processing Unit LPU2 and connected Display units.

Operating performance limits like inaccuracies or certain measurement criteria are set by the speed sensors, i.e. the combination Transducer/Electronics unit.

2 Performance The performance limits defined here are met when the log system is operating within the environmental conditions described in this section and if calibration is correctly done.

2.1 Principle of operation

Log measures acoustic correlation using vertical beams. The log system uses two different sensors, measuring Speed Through the Water (STW) and Speed Over the Ground (SOG) simultaneously and independently.

2.1.1 STW (Speed Through the Water = relative speed )

Frequencies: In the range 3.8 – 4.2 MHz Speed is measured in a water volume 120–140 mm from the surface of the transducer.

Depth requirement: greater or equal to 3 m beneath the transducer.

Speed range: +/-50 knots sensed Speed Through the Water.

2.1.2 SOG (Speed Over the Ground = true speed)

Frequency: 150 kHz Depth requirement: greater or equal to 2 m beneath the transducer.

Depth range: nominally 2 - 250 m below transducer.

Speed range: 40 knots in any direction.

2.2 Accuracy of measurement

2.2.1 STW

Speed error relative to sensed water speed: ≤ 0.1 knot or 1%, whichever is greater.

Distance error relative to travelled distance (through the water): ≤ 1%.

2.2.2 SOG

The SOG measurement system operates in different modes resulting in different accuracy of the measurement. The "Normal mode" provides better accuracy and is active when the speed and depth product (metres * knots) is above 67. The "Interpolation mode" is active when this condition is not met resulting in a lower accuracy.

Normal mode: ≤ 0.1 knot or 1%, whichever is greater.

Interpolation mode: ≤ 0.2 knots or 2%, whichever is greater.

Distance error will improve with distance due to averaging positive and negative instantaneous errors. Therefore, the error limit, expressed as a percentage of the travelled distance, will decrease with increased accumulated distance.

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Travelled distance Error 2 to 10 NM ≤ 0.2% 10 to 50 NM ≤ 0.1% Over 50 NM ≤ 0.05%

2.2.3 Echo sounder properties (valid only for SAL T 3 & T3+)

Depth range: 2-250 metres Depth error (at speed of sound 1500 m/s):

Shallow range scale (20 m): ≤ 0.5 metres or 2.5% of indicated depth, whichever is greatest Deep range scale (200 m): ≤ 5 metres or 2.5% of indicated depth, whichever is greatest

2.3 Functional limitations

2.3.1 STW

The speed measurement influence is within IEC 61023 specifications for pitching up to +/- 5 degrees and rolling at +/- 10 degrees.

The STW speed sensor is sensitive to the water flow at the transducer position. The ideal water flow is parallel with the longitudinal/keel line and non-turbulent. Reduced STW performance may occur when many acoustic reflectors are present in the water, such as muddy water in rivers and canals, river inlets, harbour areas and similar shallow water areas with soft bottom structures. When normal conditions are not met, the STW indication may intermittently show invalid status and digital indicators indicate “---”.

2.3.2 SOG

The speed measurement influence is within IEC 61023 specifications for pitching up to +/- 5 degrees and rolling at +/- 10 degrees.

The SOG sensor is using acoustic signals, thus sensitive to blocked acoustic transmission.

Moderate amount of air bubbles or ice will have a minor influence on measurement, but excessive amount makes measurement impossible. When normal conditions are not met, the SOG indication will show invalid status and digital indicators indicate “---”.

2.3.3 Echo sounder (valid only for SAL T3 & T3+)

The depth measurement influence is within ISO 9875 specifications for pitching up to +/- 5 degrees and rolling at +/- 10 degrees.

The echo sounding is using acoustic signals, thus sensitive to blocked acoustic transmission.

Moderate amount of air bubbles or ice will have a minor influence on measurement, but excessive amount makes measurement impossible. When normal conditions are not met, the depth indication will show invalid status and digital indicators indicate “---”.

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3 Environmental conditions All units of the system meet the environmental conditions specified in IEC 60945.

Unit Protected Exposed Submerged Transducer/Bottom parts X1) Electronics Unit X Log Processing Unit X Echo Sounder display X SD4 indicators (flush surface mounted) X X2) SD4 indicators (mounted in SD4 SA or SD4 BMB) X

1) The TRU cable is not intended to be installed Submerged

2) Front panel for SD indicator provides watertight mounting to panel/console surface.

4 Interfaces

4.1 Serial interface & sentences

All serial interfaces comply with IEC 61162-1 Edition 4.0 2010-11 (NMEA 0183 standard version 4.00). Transmitted sentences are $VDVBW, $VDVLW and Consilium proprietary PSAL sentences for SAL T-series speed log; and additionally $SDDPT and $SDALR only for echo sounder SAL T1 / T3 / T3+. For detailed definitions of (NMEA) sentences used in SAL speed logs, please refer to Technical Document 700164.

4.1.1 LPU2 – Log Processing unit

The LPU2 is intended to be connected to other systems. It has 23 serial outputs fed from 13 separately buffered drivers. The LPU2 has various options to perform signal processing and calculations from the speed log and other inputs. Please refer to LPU2 Technical Manual 704531 for details.

4.1.2 ELC – Electronics Unit

The ELC is connected to LPU2. It has one serial output from SOG-unit and one serial output from STW-unit. Both serial outputs should be connected to the LPU2 to obtain full redundancy between the STW- and SOG-units of the speed log.

One serial input channel is used to provide remote access for calibration and service.

4.1.3 ESD2 – Echo Sounder Display (only for SAL T3 / T3+)

The ESD2 has one serial input and one serial output connected to the LPU2 transferring the echo sounding functionality.

4.1.4 SD4 – Serial Display (Speed Log Master Displa y)

The Speed Log Master Display has one serial input and one serial output connected to the LPU2 transferring the user interface for calibration and configuration to the ELC.

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4.2 Relays, opto-couplers and analogue outputs

The LPU2 provides relay, opto-coupler and analogue outputs.

Function # of functions Switch-over contact relay outputs: 4 Closing contact(s) relay outputs: 4 Opto-coupler outputs: 8

Two analogue outputs can be individually programmed to provide requested speed information.

5 Calibration The SAL T-series speed log has calibration functions. The speed calibration factors and transducer alignment are entered into the speed log via the Speed Log Master Display, as appropriate for the SOG and STW respectively.

STW range: -50.00% to +50.00% of sensed speed in 0.01% steps.

Up to 3 different draught conditions.

Up to 10 speed calibration points.

SOG range: -50.00% to +50.00% of sensed speed in 0.01% steps SOG transducer angle range: -180.0º to +180.0º in 0.1º steps.

The STW-speed log generally needs calibration correction on all ships due to properties of water flow around the hull. The SOG log transducer angle calibration is only needed when correct mechanical transducer alignment is not fully obtained. The SOG log seldom needs calibration and requires extremely accurate reference data.

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6 Power requirements and dimensions

ELC

Voltage: 198 – 253 V AC (optionally 99 - 126 V AC) Frequency: 47.5 - 63 Hz Power consumption: less than 300 VA Dimensions (WxHxD) 360x480x240 mm Weight 18 kg

LPU2

Voltage: 198 - 253 V AC (optionally 99 - 126 V AC) Frequency: 47.5 - 63 Hz Power consumption less than 150 VA, including connected 35 W ESD2 and 9 SD4 indicators Dimensions (WxHxD) 500x500x200 mm Weight 20 kg

ESD2

Voltage: 18 - 36 V DC Power consumption typical 25W peak 35W, powered from the LPU2 Dimensions (WxHxD) 239x256x105 mm Weight 7 kg

SD4

Voltage 10 - 32 V DC Current: 150 mA maximum, 100 mA typically Powered from the LPU2. A separate AC power supply unit, SDP for 115/230 V AC operation, is optionally available, please refer to SD4 Technical Description 704005.

Dimensions (WxHxD) 144x144x16 mm Weight 0.6 kg

7 Liability All equipment described in this manual is designed for use on board ships and fulfills relevant requirements specified by International Maritime Organization (IMO).

However, equipment may sometimes fail or work outside its performance specification due to component malfunction or depending on other factors.

Consilium Marine & Safety AB will not take any responsibility if this equipment is used in such a way that normal or abnormal function causes damage or creates situations that can be dangerous.

All specifications given in this manual are subject to changes without prior notice!

Installation of

Transducer and

Bottom Parts

Article No. 701618

C o n s il çConsilium Installation of Transducer and Bottom Parts Art. No. 701618B0

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TABLE OF CONTENTS

1. General

2. Transducer location requirements

3. Installation of Bottom Parts

4. Mounting Set Single Bottom Sea Valve (MSSBSV H) . 11

5. Mounting Set Double Bottom Sea Valve (MSDBSV H) 28

6. Recommended spares and maintenance:

Revisions Date Ver. Name Comment 92-02-09 A0 PGM Created 97-12-18 A1 Ajö Dimension drawing of valve, updated figures 99-05-20 A2 Ajö/STE Typographical changes, TRU location 02-04-23 A3 JXA New first page and headers/footers 2002-07-11 A4 STE Transducer cable clarifications 2002-10-16 A5 STE Added T2 descriptions 2002-11-20 A6 HW Transducer location clarifications 2005-05-11 A7 HW Installation heights clarified 2007-11-20 A8 HW Transducer location requirements 2008-10-21 A9 RB Added MSSB and productnumber in fig 2.5+2.7 2009-02-10 AA RB/OM Added unpacking of Bottom Flange + editorial 2009-03-10 Ab OM Correspond to IEC 62288, SOG, STW… 2009-06-07 AC HW Change P/N for SAL TRU T-2-2 2010-05-24 Ad OM Company name changed 2011-12-22 Ae OM Deleted Connecting Tube length >3700mm 2013-11-01 Af OM Corrected pictures 2014-03-10 Ag SGu Hull flange cut-out figure renewed, various text edit.

2014-08-28 B0 SGu New concept with Valve Cover H.

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1. General

This part is intended to explain the various factors to be considered when selecting a position for the Transducer. The siting of the SAL TRU-2-2 Transducer is an important factor in determining the accuracy and efficiency of the overall system.

The Transducer is designed to be fitted flush with the hull, along the longitudinal axis of the ship. It measures the SOG (true speed) of the ship relative to the sea bed and the STW (relative speed) will be measured in the water mass approximately 130 mm below the ship’s hull. This makes it suitable to be installed on ships of all sizes.

NOTE: The Transducer is manufactured and tested with the integrated cable as one unit.

Do not cut or modify the Transducer cable! The relative speed measurement operates at a frequency where an undefined cable length may affect performance.

Consilium Marine & Safety AB takes no responsibility in case of cable modification.

Transducer SAL TRU-2-2

The Transducer comprises of one set (2 pcs) of piezo-electric elements for relative speed measurement and one set (5 pcs) of piezo-elements grouped in a patented array for true speed measurement. Both measurements are based on acoustic correlation principle.

The Transducer is used both for transmission and reception of the acoustic signals.

Refer to below figure “Bottom View”.

The Transducer is delivered with a 30-metre standard cable, which is permanently connected to the Transducer head with watertight mould.

Transducer dimensions are given in below figure “Profile” .

Transducer "Bottom View" from hull underside Tran sducer "Profile"

Bottom Parts

The two versions of Bottom Parts of the system are shown in Fig. 1.1 and Fig. 2.1.

A steel flange is welded to a cut-out in the ship’s bottom hull plating. The Bottom Flange, including the Guide Ring, positions the Transducer flush with the underside of the hull.

With the SeaValve arrangement the intention is to provide retraction/removal for service/maintenance or replacement of the Transducer while the ship is still afloat, thus dry docking is not needed.

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The Connecting Tube with a Tube Bracket assembly holds the Transducer fixed in its position and has a watertight Cable Gland at its top end.

Sea Valve arrangement (MSSBSV H as example)

2. Transducer location requirements To achieve proper performance of the speed log, special care must be taken to find the best area in respect of water streaming under the hull and the Transducer (TRU) sensor head.

Selecting correct TRU location shall be done in co-operation with Consilium Marine & Safety AB. It is recommended to send General Arrangement (GA) drawings, showing suggested TRU installation, to Consilium Marine & Safety AB for review and comments.

The comments given will only refer to the hydro-dynamical requirement and not the inside design, such as installation height, access to closing valve or any inside obstacles that might occur and jeopardise the function or maintenance.

Following rules must then be considered:

1. For more detailed installation advices please read the complete instruction.

2. The Transducer should be installed in the foremost part of the vessel as close as possible to the keel line.

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3. The bottom Sea Valve shall always be installed perpendicular to the ship’s horizontal plane.

4. The Sea Valve arrangement and Transducer cable are not intended for submerged mounting in a water filled tank. If no other alternative is available a separate watertight (W.T.) compartment must be arranged housing the Sea Valve/Transducer assembly. The cable must be run in a watertight pipe conduit, connecting directly from the W.T.

compartment to free/dry space where the log electronics unit (ELC) is normally installed.

5. The compartment in which the Transducer is installed may be sealed by a manhole or hatch but the compartment must always be accessible for service.

6. The Transducer cable must be installed in an accessible way to allow retraction/dismounting incase of service or replacement of a defective Transducer.

Excessive cable length shall be left uncut and coiled, i.e. one coil/loop close to the Sea Valve/TRU and remaining length close to the ELC.

Do not cut the cable! Warranty is void if cable is cut or violated.

7. Sufficient headroom must be available at the Transducer position to allow for its installation and removal (see details for appropriate Bottom Parts).

8. On tankers the Transducer location is not to be within the Ex–area. The Transducer must never come in contact with explosive cargo oil/fuel oil/gas or other hazardous cargo.

9. The Transducer cable shall run directly to the speed log ELC and must never be cut off, shortened, extended or by any other mean passing through a junction box!

10. The SAL T speed log operates with ultra-sonic frequencies of 145 - 155 kHz, and 3.8 MHz / 4.2 MHz. The Transducer location must be at least 2 metres from any echo sounder transmitters or other similar acoustic devices generating the same type of frequencies.

11. In the vicinity of the Transducer location, the outside of the vessel must be free from sudden projections, welding joints, steps and sharp edges. Special care must be taken that no obstacles appear, especially forward of the Transducer. These conditions will cause water turbulence, which may give unreliable speed readings from the system.

12. Water inlets and outlets in the nearby vicinity may disturb the water flow. Therefore the Transducer should be located at least 2 metres forward of such openings.

13. For proper speed measurements the Transducer (sensor elements) must always remain submerged, even at a minimum draught as well as in rough seas.

The Transducer is not affected or overheated by being powered when in air, e.g. during dry docking, but recommended to turn-off system when ship is not in water.

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Boundary Layer

A moving ship’s hull tends to drag a layer of water with it, causing a boundary region around the hull. The water speed at the hull is almost the same as the ship’s speed, so that the relative water speed is almost zero. With successive water layers, the relative water speed increases until, at the boundary edge, the relative water speed becomes equal to the ship’s speed. The thickness of this boundary layer is not uniform around the ship and can range from a few millimetres near the bow to more than one metre at the stern on a large ship.

The relative speed of successive water layers is not proportional to distance from the hull, but follows a theoretical curve as shown below:

Noise, Cavitations, Turbulences and Other Factors A ffecting Acoustic Speed Logs

The Transducer operates on the acoustic principle and is therefore susceptible to interference from acoustic (noise) sources. In particular, the Transducer should be fitted well away from the propeller and other sources of noise to minimise the effects of noise, vibration and cavitations.

As well severe turbulences and diverted flow directions will affect, thus installation site and hull surface conditions in the vicinity of the Transducer shall be carefully considered.

The Transducer and Electronics Unit/ELC are designed to respond principally to the acoustic reflections from water layer or sea bed denoting the speed of the ship. In some situations, however, the system may respond to false signals that can arise under adverse conditions.

A majority of acoustic devices are affected in a similar way.

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3. Installation of Bottom Parts

Detailed instructions for installing the different Bottom Parts are given in the following sections. Refer to the section covering your particular application.

The Bottom Flange, which shall be welded into the ship’s hull, is the same size whether it is for the single or double Bottom Parts.

The Bottom Flange dimensions can be seen in Fig. 1.2 and Fig. 2.2.

Unpacking of Bottom Flange

The Bottom Flange, which shall be welded into the ship’s hull, is made of construction steel.

Humidity makes the surface of the flange corrode if not protected. The flange is therefore protected from corrosion during storage and transport by a special corrosion inhibitor bag.

This bag should remain sealed during storage for the corrosion protection to have full effect.

The bag shall be opened just before the flange is to be welded into the ship`s hull.

After completed welding work it is recommended to slightly oil/grease the flange surfaces in order to prevent further corrosion until installation is completed.

Do not paint the outboard interior of the Bottom Flange nor the inboard flange gasket area or threaded stud bolt holes!

Slight normal corrosion on the flange surface will not affect the function, lifetime or quality.

Maintenance of Bottom Parts

Each bottom part assembly incorporates a Zinc Ring that acts as a sacrificial anode to prevent corrosion of the Transducer and Bottom Parts. The Zinc Ring should be checked, and changed if deteriorated, each time that the ship is dry-docked.

When maintaining the Bottom Parts it is also recommended to check and tighten the Tube Bracket clamping arrangement.

The Guide Ring, Zinc Ring or the TRU shall never be painted!

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General recommendations for flange joints/connectio ns

Further instructions below where mounting of stainless steel screws, nuts and washers is described, it is generally recommended to use certain lubrication (oil or grease or preferably Molybdenum sulfide) on threads in order to obtain smooth engagement of threads and avoid severe friction which occasionally might obstruct or even damage threads.

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Tools/Material recommended for normal installation/service/maintenance.

Listed as follows from left to right on above picture:

1 pc 55 mm width spanner/wrench (Transducer upper end) 1 pc 46 mm width spanner/wrench (Connecting Tube nut) 1 pc 40 mm width spanner/wrench (Cable Gland) 2 pcs 24 mm width spanner/wrench (Flange screws/nuts) 1 pc 17 mm width spanner/wrench (Tube Bracket screws) 1 pc 35 mm width adjustable spanner/wrench (Extra) 1 pc polygrip plier (Extra) 1 pc external circlip plier, max. tip diameter 2 mm (Tube Locking washer/Circlip) 1 pc straight bar 0.5 – 1 m length, approx. 15 x 15 mm (Recommended for alignment) 1 pc scraper/knife for eventual flange gasket removal (Not at initial installation) 1 pc screw driver, edge 2.5 x 14 mm (Guide Ring screws) 1 pc rope/sling (For Tube/TRU/Valve Cover assembly lifting/hoisting) 1 pc measuring tape/ruler (For Tube height reference measurement) Vaseline/Silicone Grease or similar (For lubrication of Lip Seals/Tube) Oil/Grease as needed (For lubrication of screws/nuts) Insulation tape (For cable termination end wrapping/protection)

Not shown on picture:

Plastic/Wooden scraper tool or cloth/rag (For careful removal of marine growth on Transducer sensor surface).

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4. Mounting Set Single Bottom Sea Valve (MSSBSV H)

This mounting set is suitable for ships where an installation site can be found directly in the bottom hull/skin of the ship, i.e. “single bottom”.

Before starting installation and assembly check the contents of the kit according to Fig. 1.1.

Fig. 1.1 MSSBSV H Assembly / Part Numbers

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Overall dimensions of the final installation is shown in Fig. 1.2.

Fig.1.2 MSSBSV H Main dimensions

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Bottom Flange hull mounting procedures

The Bottom Flange must first be welded into a hole cut in the ship’s bottom hull.

1. Cut a circular hole (diameter 250mm +10/–0mm) at the selected Transducer position.

Hole cut in Ship's Hull

Positioning Bottom Flange flush with hull outside

Notes:

• IT IS IMPORTANT that the outer (bottom) surface of the flange is flush with the hull and exactly vertical/perpendicular and horizontal in a flat area of the hull underside.

For this kind of installation there is no direction requirement (longitudinal or transverse) of the flange. Disregard any markings (red dot/groove) on the flange.

The markings are intended for other purpose and are not used here.

• Welding work shall be carried out by qualified personnel as required by the applicable classification society.

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2. Weld the Bottom Flange into the hole, ensure that it is positioned so that the Sea Valve may be fitted inboard (in desired direction) without obstruction.

Welding Bottom Flange in Ship’s Hull

• The welded joint must be ground smooth and flush with the hull. There must be no sharp edges to interfere with the water flow around the Transducer.

Welded joint grinding

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3. Fit the Zinc Ring and the Guide Ring into the outside base of the Bottom Flange and secure with the six MFS 10x30 screws. Firmly tighten.

Mounting Zinc Ring and Guide Ring from ship’s outsi de

4. Screw the eight PS 16x40 Studs into the top side of the Bottom Flange.

Short threaded end downwards! Firmly tighten.

Mounting Studs

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5. Assure that the flange surface is clean. Place a gasket, Seal 1, on the flange.

Gasket Seal 1

6. Assure that both Sea Valve flanges are clean.

• Fit the Sea Valve over the studs with the Position Indicator pin upwards.

- There is no directional requirement for the handwheel.

- Mount as space allows and convenience for operation.

• Centre on the flange and secure with eight Spring Washers and eight M6M M16 Nuts.

• Slightly pre-tighten the nuts crosswise/diagonally.

• Finish by firmly tighten all nuts again crosswise/diagonally.

Mounting Sea Valve on Bottom Flange

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Transducer and Valve Cover Assembling

The Assembly consists of:

• Transducer with cable (30/40 m)

• Valve Cover with:

- Connecting Tube with sealing items.

- Tube Bracket with mounting items.

Assemble as follows:

1. The Valve Cover shall not yet be mounted on the Sea Valve.

• Check that the two Lip Seals are correctly mounted inside the top end of the Valve Cover. Normally mounted from factory.

• Assure Lip Seals to be clean and free from particles/dirt.

• Slightly lubricate the Lip Seals with Vaseline, Silicone grease or similar.

2. Mount the Cable Gland on the Connecting Tube.

Cable Gland mounted

3. Gently push the Connecting Tube through the Valve Cover top end.

Note: It is important that the Connecting Tube is inserted from top end of the Valve Cover. Never try to insert the opposite way, will damage the Lip Seals.

Connecting Tube inserted

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4. Mount the Nut, Locking Washer/Circlip, Washer and O-Ring onto the Connecting Tube strictly in the order shown below.

Mounting Sealing items

Sealing items mounted – Ready for Cable insertion

5. Uncoil and lay out the complete length of the Transducer cable to make it available for insertion through the Connecting Tube.

Maintain transport protection on the Transducer Head as far as possible and be careful during mounting procedures.

• It is recommended to temporarily wrap the termination pins with insulation tape to ease insertion and for protection throughout the installation work.

• If necessary partly disassemble the Cable Gland to make it easier to feed the termination pins through the Gland.

• Carefully feed the cable end through the tube and through the Cable Gland.

• Re-assemble the Cable Gland when a short length of the cable is passed through.

• Do not tighten the Cable Gland at this stage.

• Pull the complete length of cable through the tube.

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Cable Gland mounted and cable passed through

6. Remove the Transducer transport protection.

Note: From this point and forward in the instruction the Transducer Head must be handled with proper care not to be damaged.

7. Push the Transducer onto the Connecting Tube checking carefully that the Slot in the

Connecting Tube is correctly aligned with the Guide Pin in the Transducer.

8. Engage the Nut in the Transducer threads (only possible when Slot and Guide Pin are aligned!) and firmly tighten the Nut.

9. Securely tighten the Cable Gland around the cable.

Transducer and Connecting Tube assembled

10. Push the Transducer/Tube assembly completely into the Valve Cover.

Do not rest the Transducer on its sensor surface!

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11. Pre-mounting of the Tube Bracket. See picture below!

• Mount the two clamping parts close up against the Cable Gland and slightly tighten the two M6S M10x60 Screws with Spring Washers in order to allow lifting the complete assembly by the Tube Bracket.

Transducer fully retracted into Valve Cover – Tube Bracket pre-mounted

12. Before lifting the assembly vertically, arrange assisting personnel or a support rope or sling around the Tube Bracket to securely hold the Transducer in fully retracted position inside the Valve Cover during the mounting procedure on the Sea Valve.

13. Place a gasket, Seal 2, centred with the screw holes on the clean Sea Valve top flange.

Gasket Seal 2

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14. Carefully lift and place the Transducer and Valve Cover assembly on the Sea Valve flange properly centred with Seal 2 and flange holes.

Ensure that the Transducer is still maintained fully retracted into the Valve Cover and does not accidently hit any hard surfaces and do not lower the Transducer before the Sea Valve gate is fully opened!

Mounting Transducer and Valve Cover assembly on Sea Valve

15. Crosswise loosely secure the Transducer and Valve Cover assembly on the Sea Valve using six M6S M16x60 Screws, six Spring Washers and six M6M M16 Nuts leaving two diagonally positioned flange screw holes free for the Bracket Bolts.

- Any diagonal position can be used.

- There is no direction requirement for the Valve Cover.

• Mount the two Bracket Bolts in the two free flange screw holes assuring that the longer threaded ends are mounted downwards.

• Loosely secure the Bracket Bolts at the lower ends with two Spring Washers and two M6M M16 Nuts.

• Finish by crosswise firmly tighten all flange screws/bolts and nuts

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Transducer and Valve Cover mounted - Sea Valve ful ly opened

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16. Fully open the Sea Valve, approximately 27.5 - 28 full turns counter-clockwise on the handwheel from fully closed to fully open.

• Gently slide down the Connecting Tube to carefully lower the Transducer into the Sea Valve.

A slight resistance might be felt when the Transducer sensor head edge enters the chamfered Guide Ring.

When the tube reaches stop position the Transducer should be seated flush in the Guide Ring.

Transducer lowered down to flush seating in Guide R ing

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17. Properly loosen the two clamping Screws (M6S M10x60) on the Tube Bracket a few turns and slightly split the two clamping parts and gently slide down the Tube Bracket and rotate as necessary to align the Tube Bracket holes with the two Bracket Bolts.

• Verify that the Tube Bracket rests properly on the Bracket Bolts “seat”.

• Evenly secure the Bracket Bolts upper ends (short threads) in the Tube Bracket with two Spring Washers and two M6M M16 Nuts. Firmly tighten.

• Final adjustment for flush seating and keel/longitudinal line parallel alignment to follow below.

• A check measurement to Tube top end with Tube Bracket tightened in its final position is approximately 182 +/-1 mm as indicated in Fig. 1.2 above.

Tube Bracket in its final position with Transducer flush seated.

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18. Complete the adjustments by aligning the Connection Tube “SB” flat mark as shown in Fig. 1.3 below.

Ensure that the Transducer is correctly seated at its lowest position.

Verify this by checking the Transducer installation as possible from outside the ship’s hull. For future records preferraby documented by photos.

Note: IT IS IMPORTANT THAT THE TRANSDUCER IS CORRECTLY

SEATED AND PROPERLY ALIGNED.

• Proceed as below on next page!

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19. Assure that the Tube Bracket clamping screws are loosened and freely turn the tube so that the flat area on the Connecting Tube faces strictly to StarBoard and aligned parallel with the keel line within ±1°.

• Use a straight guide bar held against the flat area to facilitate this, see Fig 1.3.

• By thorough eye aiming, or measure with a ruler/meter tape, align parallel with any keel/longitudinal line reference (bulkhead, stiffener plate, girder, longitudinal weld seam or similar).

• Re-check the tube height reference (assuring Transducer still properly seated) and then firmly tighten Tube Bracket clamping screws at this position as well as the nuts on top of the Tube Bracket.

Fig. 1.3 Aligning Transducer Connecting Tube

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Transducer Cable to Electronics Unit - ELC

• The Transducer cable must be installed/laid in a way to allow removal in case of service or replacement of a defective Transducer.

•…