ALL INFORMATION INCLUDING TEXT AND DRAWINGS IS THE PROPERTY OF JOHN LILLEY AND GILLIE LIMITED AND IS SUBMITTED AS CONFIDENTIAL INFORMATION WHICH MUST NOT BE
USED FOR ANY PURPOSE OTHER THAN FOR WHICH IT IS SUPPLIED. IT MUST NOT BE COPIED OR USED FOR THE PURPOSE OF MANUFACTURE.
7080
INSTALLATION
& OPERATION
HANDBOOK
PLEASE READ PRIOR TO INSTALLATION (STATED ESD PRECAUTIONS MUST BE TAKEN
DURING INSTALLATION AND DURING ANY SUBSEQUENT MAINTENANCE PROCEDURES)
OPERATION & INSTALLATION
INSTRUCTIONS
ISSUE: 3 REVISION: 2
ISSUE DATE: 11/11/2015 CHANGE NOTE: ECO0083 SOFTWARE VERSION:- V1.04.XX
7080 Operation & Installation Handbook
CONTENTS
Page
1
Introduction
5
1.1
The log transducer assembly
6
1.1.1
Transducers without a seavalve
6
1.1.2
Transducers with a seavalve
6
1.2
The Electronics Unit
6
1.2.1
EM log interface
6
1.2.2
5 Channel I/O Board
7
1.2.3
Universal microprocessor unit
11
1.3
7070/7080 indicators
11
1.3.1
Log Data Display: P1248
11
1.3.2
Wind Data Display: P1249
1.3.3
Weather Data Display: P1255
12
13
1.4
Wind Sensors
15
1.4.1
Cup Unit: P299
1.4.2
Vane Unit: P300
1.4.3
Solid State Wind Sensor: P292
1.4.4
Combined Cup & Vane Unit: P296
1.4.5
Combined Wind & Weather Sensor: P1003
1.5
Weather Sensor
1.5.1 Weather Sensor: P1002
1.6
General materials specification
15
15
15
16
18
18
18
18
1.7
Applicable Standards
20
19
Installation
21
a.
All log transducers
21
b.
Fixed log transducers
22
c.
Seavalved transducers
23
i.
Seavalved transducers - steel hulls
23
ii.
Seavalved transducers -
wood/GRP hulls
25
d.
Log Transducer and cabling
28
e.
Electronics Unit
2.5.1 Wiring
29
29
f.
Power Supply
30
g.
7070/7080 Indicators
i.
Wiring
h.
Wind Instruments
31
31
33
7080 Operation & Installation Handbook
2.8.1 Solid State Wind Sensor: P292
33
1.
Wiring
2.
Sensor Orientation
3.
Sensor Cleaning
4.
Sensor Servicing
2.8.2 Combined Cup & Vane Wind Sensor: P296
2.8.2.1 Wiring
2.8.2.2 Sensor Orientation
2.8.2.3 Sensor Cleaning
2.8.2.4 Sensor Servicing
2.8.3 General Information – Installation of
Cables
2.8.3.1 Cable Classes
2.8.3.2 Segregation Distances
33
34
35
35
36
36
37
38
38
41
41
42
2.9 Setting up the 7080
43
2.9.1 Switching ON & Configuration
43
2.9.2 Zero control
47
2.9.3 Calibrating the Log Function (Cal Methods)
2.9.3.1
“Known Speed” Procedure
2.9.3.2
“Known Distance” Procedure
2.9.3.3
“GPS Mile (D/T)” Procedure
48
51
55
60
2.10 Test facility
64
20
Operation
65
a.
Electronics Unit
65
i.
Operating environment
65
ii.
Normal operation
67
b.
7070/7080 indicators
69
i.
Log Data Display: P1248
3.2.1.1 Operational Features
69
69
ii.
Wind Data Display: P1249
1.
Operational Features
iii.
Weather Data Display: P1255
3.2.3.1 Operational Features
3.3 IEC 61162-1 (NMEA 0183) Data
70
70
71
71
7080 Operation & Installation Handbook
4 Maintenance
4.1
Log System
4.1.1
Sea-Valved Transducers
4.1.2
Fixed Type Transducers
4.1.3
EM Log Transducer Checks
4.1.3.1
Checking EM Log Transducer
with vessel in Drydock
4.1.3.2
Checking Transducer with
vessel afloat in seawater
4.1.3.3
General Notes
4.1.3.4
Checking Transducer Drive
4.1.3.5
Checking Diagnostic LEDs on 5
Channel I/O Board
4.1.4
Log Data Display: P1248
4.1.4.1
Maintenance
4.1.4.2
Fault Finding
4.2
Wind System
4.2.1
Wind Sensors
4.2.1.1
Maintenance
4.2.2
Wind Data Display: P1249
4.2.2.1
Maintenance
4.2.2.2
Fault Finding
4.3
Weather System
4.3.1
Weather Sensor
4.3.1.1
Maintenance
4.3.2
Weather Data Display: P1255
4.3.2.1
Maintenance
4.3.2.2
Fault Finding
77
77
77
78
78
78
81
83
84
85
87
87
87
89
89
89
89
89
89
91
91
91
91
91
91
7080 Operation & Installation Handbook
5 Drawings
5.1
7080 key functions
3406-A3-11
5.2
Transducer and skin fitting - steel hulls
2849/3/59
5.3
Transducer and skin fitting - alloy hulls
2849/3/50
5.4
Transducer and skin fitting - wood/GRP hulls
2849/3/51
5.5
Transducer and seavalve skin fitting - steel hulls
2900/4/1-1
5.6
Transducer and seavalve skin fitting - wood/GRP
hulls
2905/4/2-1
5.7
Connection Diagram: 7080 Log & Wind system
(5 Sheets)
3352-A3-173
5.8
Basic Assembly 7080 Electronic Unit
3406-A3-1
5.9
Transducer PCB
F-1877
5.10
5 Channel I/O (Interface) PCB (H/Bk: front view)
3390-A3-13
5.11
Electronics Unit - outline
3406-A3-10
5.12
Log Data Display (DIN 43700) - outline
3419-A3-10
5.13
Wind Data Display (DIN 43700) - outline
5.14
Weather Data Display (DIN 43700) - outline
3418-A3-10
3423-A3-10
5.15
Panel cut-out details - DIN 43700
3347-A3-71
5.16
Ultrasonic Wind Sensor: P292 - outline
5.17
Combined Wind Sensor: P296 - outline
5.18
Typical transducer installation positions
5.19
Power Supply Unit (P1010)
3342-2-7
3343-2-30
3389-A3-7
5.20 Connection Details: P1248 Log Data Display
including use of 24Vdc Supply common to the
7080 Electronic Unit (ref Sheet 2)
5.21 “KNOWN SPEED” Calibration Diagram
(for section 2.9.3.1)
5.22 ”KNOWN DISTANCE” Calibration Diagram
(for section 2.9.3.2)
5.23 “GPS MILE (D/T)” Calibration Diagram
(for section 2.9.3.3)
5.24 P1100 Menu System Flow Chart
5.25 P1100 Data Flow Diagram
Always refer to specific connection diagram
provided with the particular system concerned.
3419-A3-11
3406-A3-2
3406-A3-3
7080 Operation & Installation Handbook
1 INTRODUCTION
The log employs electromagnetism as its operating principle.
A magnetic field is produced in the water near the log sensor face. The magnetic field induces an electrical voltage gradient in this water as it flows past the sensor. This voltage is detected by electrodes situated on the face of the sensor and passed to the Electronic Unit for measurement, to provide speed information to the microprocessor.
The electromagnetic principle has several advantages over other methods of measurement:-
a) It is unaffected by changes in draught pressure
b) There are no moving parts or pipes associated with the log sensor
c) The relationship between water speed and sensor output is linear, resulting in high sensitivity at
all speeds.
d) Calibration is unaffected by changes in the water salinity due to the relatively high input
impedance of the measuring circuit.
NOTE!
When the depth of water beneath a vessel is relatively shallow, the flow of water may be accelerated so that the log shows an increased speed. This does not depend on the type of log, but on the physical geometry involved. Similarly, the trim of the vessel may influence the boundary layer conditions to produce a small change in calibration of the log. Such affects will vary with the shape of the hull and position of the log transducer.
Sea state may cause abnormal fluctuations in the indicated speed and should the transducer come completely out of the water, the indicated speed may increase to the maximum scale reading. This will temporarily increase the rate at which distance is recorded.
7080 Operation & Installation Handbook
1.1 The Log Transducer Assembly
This is available either with or without a seavalve.
1.1.1 Transducers without a seavalve
a) Drawing 2849/3/59 shows the construction for steel hulls, consisting of a steel reinforcing pad
into which a bronze transducer is fitted.
b) Drawing 2849/3/50 shows a similar arrangement for aluminium hulls but the steel pad is replaced
by a piece of aluminium alloy and in this case the transducer is manufactured in 316 S16 stainless steel.
c) Drawing 2849/3/51. For wood/GRP hulls a bronze transducer is used with additional length in
order to accommodate the greater thickness of planking in the case of wooden hulls. A bronze pad is screwed or bolted to the hull and is further retained by the bronze transducer assembly.
1.1.2 Transducer with seavalve
a) Drawing 2900/4/1-1 shows the skin fitting and transducer for steel hulls. A steel reinforcing pad
is welded to the hull and a bronze gate valve bolted to the top of the pad. The transducer can be withdrawn for cleaning or servicing while the vessel is afloat.
b) For wood/GRP hulls a bronze skin fitting is bolted through the hull and again a bronze seavalve
mounted to the top of the skin fitting. The transducer is removable with the vessel afloat (see drawing 2905/4/2-1).
1.2 The P1100 Master Electronics / Control Unit
The 7080 is available as a combined ship log and wind speed /direction system, or as a combined ship log, wind speed/direction, and weather system. The P1100 Master Electronics / Control Unit comprises three separate main units, the ElectroMagnetic (EM) Log interface (Transducer Board), the 5 Channel I/O Board and the Microprocessor Unit.
1.2.1 EM Log Interface (Transducer Board)
The EM log interface drives the electromagnetic log transducer; the winding of the transducer being energised at a nominal 115v 27.5Hz. This creates a magnetic field in the “solid” water below the face of the transducer. The sensed low level AC voltage, measured at the electrode beads, and created from the “single turn” generator formed by the “solid” water within the magnetic field at any instant, is returned to the speed amplification circuit of the transducer (EM Log Interface) board. After amplification, a
7080 Operation & Installation Handbook
voltage proportional to the speed of water over the face of the transducer is produced. This is fed into the microprocessor circuit.
The EM Log Interface also has two digital NMEA 0183 serial outputs meeting IEC 61162-1 requirements, that repeat the messages output from TX Channel 1 of the I/O board, and two pairs of 200 pulses per nautical mile outputs.
NMEA 0183 output speed-log sentences are:- “VHW”, “VBW” and “VLW. Regarding the “VHW”
sentence, note that heading is not always transmitted as a null field. If input NMEA 0183 serial data, as
a HDT message, meeting IEC61162-1 standard, from a gyro, for instance, contains valid heading
information, this will be inserted into the appropriate field of the “VHW” sentence. Sentences:
$VMVLW,xxxxx,N,xxxxx.x,N,,N,,N*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) $VMVBW,xxx.x,,A,,,V,,V,,V*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1:2010)
$VMVHW,,T,,M,xxx.x,N,xxx.x,K*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1:2010)
Output message frequency is 1 Hz. Note that both NMEA 0183 O/Put ports give all messages (except proprietary JLG dimmer messages) input to the 5 Channel I/O board (see section 1.2.2) plus those calculated by the P1100 microprocessor software.
NMEA Drivers are SN75176AP. Output drive capability rated at 1 NMEA load of 500 ohms each port;
providing for a maximum of 2 NMEA listeners (1K0 impedance each) per output port.
1.2.2 5 Channel I/O Board
The 5 Channel I/O board provides the system with an interface for the acceptance of other serial sentences.
5 separate IEC 61162-1 (NMEA 0183) sentences can be input via the 5 available input channels. These inputs are provided with opto-isolators (1k0 in-line impedance) and require a minimum of 0.5mA per channel.
Messages are all passed onto the microprocessor board where appropriate data is extracted from particular sentences as recognised by the P1100 software and necessary calculations are performed. IEC 61162-1 (NMEA 0183) sentences are re-transmitted. These are available on output channels 1, 3, 4 and 5, for use by other shipboard equipment and in particular Walker P1248 Log Data Displays, P1249 Wind Data Displays and P1255 Weather Data displays. Output channel 1 also includes a set of 24Vdc power output terminals.
7080 Operation & Installation Handbook
Output Channel 5 can also be used for transmission of proprietary Walker/JLG sentences. Any such messages, input at any of the input channels, are only available for onward connection from Output Channel 5.
Output Channel 2 is dedicated as a “legacy” channel and provides serial data, and 24Vdc power, to
earlier Walker P248 Log / P249 Wind and/or P255 Weather Displays. This “legacy” channel has a
message frequency of 1.5Hz. Use of earlier Walker P255 Weather Displays is only possible, provided that a P1002 Weather Sensor, or a P1003 Wind and Weather Sensor, is used to provide the required serial “XDR” message into the 5 Channel I/O Board.
LEDs are fitted for diagnostic purposes and are covered in section 4.1.3.5
Various Walker Wind Sensors can be connected into the 5 Channel I/O Board.
A combined ultrasonic masthead unit; P292, is available (see drg. 3342-2-7) for connection into any one of the five input channels. This type of wind sensor outputs a NMEA 0183 “MWV” serial wind sentence with the wind speed in knots.
Alternatively, the Walker P296 combined cup and vane unit (see drg. 3343-2-30) can also be used. Again, this unit also outputs a NMEA 0183 “MWV” serial wind sentence with the wind speed in knots.
As an alternative to either of the above, a separate wind speed sensor (cup unit) and a separate wind direction sensor (vane unit); P299 and P300 respectively, can also be used. Two input channels would be used, one for each type of sensor. Both sentences would be passed on to the microprocessor board where the wind speed data; from the P299, and the wind direction data, from the P300, would be extracted before the “MWV” sentence was re-formulated to include both wind speed and wind direction data.
Alternatively, IEC 61162-1 (NMEA 0183) “MWV” sentence/s, described above, may be input separately, from other talkers, into any available input channel/s.
Full list of IEC 61162-1 (NMEA 0183) sentence formatters that may be input, from other ship’s equipment, in order that full functionality of the P1100 unit can be utilised, are as follows:
7080 Operation & Installation Handbook
“MWV” (either separate sentence with relative wind speed and a further separate sentence with relative wind direction or as a single sentence containing both relative wind speed and relative wind direction values)
“HDT” – for heading*.
“VTG” – for speed over ground* / course over ground*.
“GGA” – UTC of position fix / latitude / longitude / GPS quality indicator / number of satellites / HDOP #.
“VHW” – in absence of a fitted Walker transducer, for a source of speed through the water (secondary use*) or as an alternative source of heading.
“VBW” – in absence of a fitted Walker transducer for a source of speed through the water (secondary use*) or, if included, speed over ground (primary use*)
“XDR” – for weather information; if required. A single message is passed through. Note however, that if a P1263, water temperature sensor is also connected, in addition to a P1002, or P1003, sensor, the data fields will be re-transmitted as a single string.
* For automatic calculation and transmission of “True Wind” information. # For automatic GPS calibration.
After processing, the P1100 unit will combine and output a message string that includes sentences as follows:- “VHW” “VBW” “VLW” “MWV” (relative) “MWV” (theoretical)
“MWD” sentence will be output if a “VTG” or “HDT” sentence is input
7080 Operation & Installation Handbook
Full details of sentences that can therefore be output; providing NMEA input requirements are met, are as follows:
$VMVHW,,T,,M,xxx.x,N,,K*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1:2010) Note that this message is transmitted on legacy Output Channel 2.
$VMVLW,xxxxx,N,xxxxx.x,N*hh<CR><LF> (NMEA 0183 v2.30 / IEC 61162-1:2000) Note that this message is transmitted on legacy Output Channel 2.
$VMVLW,xxxxx,N,xxxxx.x,N,,N,,N*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 3, 4 and 5.
$VMVBW,xxx.x,,A,,,V,,V,,V*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 3, 4 and 5.
$WIMWV,xxx.x,R,xxx.x,N,A*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 2, 3, 4 and 5.
$WIMWV,xxx.x,T,xxx.x,N,A*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 2, 3, 4 and 5.
$WIMWD,xxx.x,T,,,xxx.x,N,,M*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 2, 3, 4 and 5.
$WIXDR,a,x.x,a,c - - c, ……….a,x.x,a,c - - c*hh<CR><LF> Note that this message is transmitted on Output Channels 1, 2, 3, 4 and 5.
$VMVHW,,T,,M,xxx.x,N,xxx.x,K*hh<CR><LF> (NMEA 0183 v4.00 / IEC 61162-1: 2010) Note that this message is transmitted on Output Channels 1, 3, 4 and 5.
Any “GGA” / “VTG” messages will be re-transmitted as received, from Output Channels 1, 3, 4 and 5.
Output message frequency is 1 Hz with regard to any message output on Channel 1. Any messages output on Channel 1 will also be output on Channels 1A* and 1B*.
* IEC 61162-1 (NMEA 0183) output channels on EM Log Interface (Transducer Board).
NMEA Drivers are MAX3442E. Output drive capability rated at 1 NMEA load of 500 ohms each port; providing for a maximum of 2 NMEA listeners (1K0 impedance each) per output port.
7080 Operation & Installation Handbook
1.2.3 Universal Microprocessor Unit
The microprocessor allows digital processing of information to take place, making the equipment more “intelligent” in that it is capable of performing additional functions. The front panel LCD display and keypad connect into this circuit, allowing the operator to interact with the system. The loaded software enables the system to carry out all the necessary log calibration procedures, compiles associated look-up tables, provides constant monitoring of transducer signal levels, serial IEC 61162-1 (NMEA 0183) data extraction and full calculation processes to provide IEC 61162-1 (NMEA 0183) output data for both log and “true” wind. Constant monitoring, for validity of both received and transmitted IEC 61162-1 (NMEA 0183) serial data, is carried out.
1.3 The 7070/7080 Indicators
As well as having a built in LCD display, the 7080 has various types of remote indicators; for log, displaying speed and distance, for wind, displaying wind speed and direction, and for weather, displaying air temperature, barometric pressure, relative humidity and water temperature. These are driven from the Electronics Unit using digital communication. The indicators have integral illumination controls, which allow dimming to extinction if required. All the displays are made up of a common rear power/microprocessor PCB and a front “OLED” display board. The front “OLED” display board for the P1249 Wind Data Display is the only one that is different from all the other front “OLED” display boards.
See sections 1.3.1 onwards for additional information concerning the available displays and refer specifically to the full Data Sheets; available separately.
Various indicator controls are also available. These allow remote operation of the displays and allow them to be mounted in “over-head” consoles. Separate data sheets are again available.
1.3.1 Log Data Display: P1248
The P1248 Log Data Display is housed in a DIN 43700 pattern (Din144 x 144) case and reads IEC 61162-1, NMEA 0183, “VLW”, “VHW” and “VBW” serial data to provide readings of Log Speed through the Water (STW) in Knots, Trip Distance travelled through the water, and Total Distance travelled through the water, both in Nautical Miles. A relay contact can be used for re-setting Trip Distance. Power supply requirement is 24Vdc.
7080 Operation & Installation Handbook
The unit has two 256*64 pixel OLED Graphic displays, 4 Touch switches; for trip reset, trip and total distance display modes and illumination control, 4 NMEA 0183 inputs and 1 NMEA 0183 output.
Displayed readings meet the requirements of IEC 62288: 2008, for the presentation of navigational-related information on shipborne navigational displays. Operational controls likewise reflect the appropriate requirements specified within this standard.
The P1248 installation drawing is 3419-A3-10; panel cut-out detail is 3347-A3-71. For separate connection diagram, 3419-A3-11, refer to individual P1248 Data Sheet.
A P1275, log indicator control, is also available, which allows remote “mode” and “illumination” control of the P1248 log data display. This allows the P1248 Display to be mounted in an “over-head” console. A separate P1275 data sheet is available.
1.3.2 Wind Data Display: P1249
The P1249 Wind Data Display is housed in a DIN 43700 pattern (Din144 x 144) case and reads IEC 61162-1, NMEA 0183, “MWV” and “MWD” serial data to provide readings of Relative, True, and True to Ship, wind speed and direction. Power supply requirement is 24Vdc.
The unit has two 256*64 pixel OLED Graphic displays, 4 Touch switches; for display mode, scaling
and illumination control, 4 NMEA 0183 inputs and 1 NMEA 0183 output. A ring of LEDs in 5°
steps also indicates wind direction.
Three “MODES” of operation are provided.
In “Mode 1”, activated by pressing on the “REL” key, the top display will show Relative wind speed, with the lower display showing Relative wind direction. If the “REL” key is successively pressed 3 times or more within 3 seconds, then the displayed Wind Speed units will change with each subsequent key press in the sequence KTS, M/S, KPH and MPH.
In “Mode 2”, activated by pressing on the “TRUE” key, the top display will show True wind speed, with the lower display showing True wind direction.
A further press of the “TRUE” key will toggle the display to “Mode 3”, which will display “True to Ship” wind data. Further presses of the “TRUE” key will toggle the display between Mode 2 and Mode 3.
7080 Operation & Installation Handbook
Relative, True or True to Ship, wind direction is also indicated on the ring of LEDs as appropriate to the activated display mode.
Displayed readings meet the requirements of IEC 62288: 2008, for the presentation of navigational-related information on shipborne navigational displays. Operational controls likewise reflect the appropriate requirements specified within this standard.
The P1249 installation drawing is 3418-A3-10; panel cut-out detail is 3347-A3-71. For separate connection diagram 3418-A3-11, refer to individual P1249 Data Sheet.
A P1274, wind indicator control, is also available, which allows remote “mode” and “illumination” control of the P1249 wind data display. This allows the P1249 Display to be mounted in an “over-head” console. A separate P1274 data sheet is available.
1.3.3 Weather Data Display: P1255
The P1255 Weather Data Display is housed in a DIN 43700 pattern (Din144 x 144) case and reads IEC 61162-1, NMEA 0183, “XDR” serial data to provide readings of barometric pressure; together with barometric trend, humidity, air temperature and seawater temperature. Power supply requirement is 24Vdc.
The unit has two 256*64 pixel OLED Graphic displays, 4 Touch switches; for display mode and illumination control, 4 NMEA 0183 inputs and 1 NMEA 0183 output.
Two “MODES” of operation are provided. In “Mode 1”, activated by pressing on the “Pr mBar” key, the top display will show barometric pressure and “trend”, with the lower display showing air temperature. In “Mode 2”, activated by pressing on the “Rh %” key, the top display will show humidity with the lower display showing water temperature. All temperature readings are shown in degrees Celsius, barometric pressure is given in millibars and humidity as %.
The unit can thus be switched between “Modes” to display Barometric Pressure / “Trend” and Air Temperature, or Humidity and Water Temperature.
Displayed readings meet the requirements of IEC 62288: 2008, for the presentation of navigational-related information on shipborne navigational displays. Operational controls likewise reflect the appropriate requirements specified within this standard.
7080 Operation & Installation Handbook
The P1255 installation drawing is 3423-A3-10; panel cut-out detail is 3347-A3-71. For separate connection diagram 3423-A3-11, refer to individual P1255 Data Sheet.
A P1276, wind indicator control, is also available, which allows remote “mode” and “illumination” control of the P1255 weather data display. This allows the P1255 Display to be mounted in an “over-head” console. A separate P1276 data sheet is available.
7080 Operation & Installation Handbook
1.4 Wind Sensors
Whilst the system can measure wind speed and direction by means of either;
A) a separate cup unit and a separate vane unit, or
B) a solid state masthead unit (combined type), P292, or
C) a combined Walker cup and vane unit sensor, P296, or
D) a combined Walker Wind and Weather Sensor, P1003,
the most common means of measuring wind speed and direction is using B) or C) above. The solid state wind sensor, P292, is therefore covered in section 1.4.3, with the combined cup and vane sensor, P296, covered in section 1.4.4. For any other type of wind sensor, refer to appropriate data sheet/s.
Connection details for the 7080 system are as shown on the appropriate block diagram. This has to be read in conjunction with the layout drawings of the Transducer PCB and the 5 Channel I/O PCB for full connection information.
1.4.1 Cup Unit P299
Refer to separate Data Sheet covering supplied wind sensor.
1.4.2 Vane Unit P300
Refer to separate Data Sheet covering supplied wind sensor.
1.4.3 Solid State Wind Sensor. P292 (drawing 3342-2-7)
The acoustic sensing technique coupled with state-of-the-art signal processing gives the head the ability to provide accurate measurement of wind speed and direction over an extensive range. The design overcomes the inherent problem of gust identification created by the slip streaming of traditional cup type anemometers and offers high performance without routine maintenance or calibration.
A flanged tower carries the sensor assembly and the symmetrical arrangement of the acoustic chamber and the materials used results in a very robust and lightweight unit with no moving parts. The wind speed and wind direction measurements are made across the measurement plane within the transducer sensing area with the resultant information sent to the wind data display in NMEA0183 serial format. This digital signalling makes the cable length to the display arbitrary, unlike some
7080 Operation & Installation Handbook
traditional current loop driven devices, which may need compensation for cable resistance and can be susceptible to error created by induction along the cable. Correct orientation of the sensor is essential and this aspect is covered later; see section 2.8.2.2 “SENSOR ORIENTATION”.
IMPORTANT: DO NOT REMOVE THE BLACK “RUBBER” TRANSDUCER CAPS.
WARRANTY IS VOID IF THE BLUE SECURITY SEAL IS DAMAGED OR BROKEN, OR IF THE TRANSDUCER CAPS HAVE BEEN DAMAGED.
Where two such sensors are specified and fitted; one on the port side and one on the starboard side, a manual sensor selector switch is available to provide for operator only selection of NMEA 0183 “MWV” serial data from the appropriate windward sensor. Alternatively a P1812 switch interface is available to provide automatic selection of serial data from the windward sensor.
Note that the NMEA 0183 “MWV” sentence transmitted from the solid state wind sensor is read by the 7080 software before being re-transmitted to any fitted wind data displays or to other connected receiving equipment.
Transmitted sentence from the P292 is $WIMWV,xxx,R,xxx.x,N,A*hh<CR><LF>)
Note that, at wind speeds above 120 knots, the status field will show V (invalid measurement).
1.4.4 Combined Cup and Vane Wind Sensor. P296 (Drawing 3343-2-30)
The unit consists of a combined masthead unit incorporating wind speed and wind direction sensors, which are used to provide serial data of wind speed and wind direction.
This unit consists of two distinctly different sections; an upper vane unit and a lower cup unit assembly.
A] Cup Unit.
The unit carries a cupset fitted to a stainless steel shaft, which runs in shielded bearings. A cap fitted to the shaft provides a labyrinth for protection against water ingress. The slotted end of the shaft, driven by the cupset rotates within an opto-switch carried on the lower PCB of a board assembly mounted within the carrying tube. Twice per revolution of the cupset, a square wave signal is produced which is fed directly to a microcontroller. The processor times the duration between successive pulses and, by using a stored look-up table, appropriate for the cupset concerned, the wind speed value is calculated.
7080 Operation & Installation Handbook
The cupset is initially supplied separately and will require fitting to the main unit prior to installation on the vessel. The procedure for fitting the cupset is given below.
1] Remove the retaining nut and the “seeloc” washer from the drive shaft at the bottom of the main unit of the P296 sensor. Hold the flanged cap, attached to the drive shaft, steady, in order for facilitate the unscrewing of the retaining nut.
2] Fit the cupset over the drive shaft ensuring that the location “pip” in the centre section of the cupset faces upwards and locates correctly in the hole in the flange of the cap.
3] Replace “seeloc” washer, re-attach retaining nut and, holding Cupset engaged in cap, securely lock the retaining nut down onto the washer. Rotate the cupset to check that it runs square with the drive shaft.
B] Vane Unit.
This unit carries a vane assembly fitted to a stainless steel shaft, which runs in shielded bearings. The vane cap forms a labyrinth for protection against water ingress. The vane is attached by two set screws diametrically opposite through the cap itself. The lower end of the shaft, driven by the vane, carries a circular magnet, which rotates above hall-effect sensors mounted on the upper pcb of the assembly mounted within the carrying tube. Signals produced as the vane rotates to take up a position determined by the wind are fed directly to a microcontroller for calculation of wind direction.
The sensor, attached to a stainless steel arm and block assembly, is provided with a mounting bracket suitable for securing onto the horizontal surface of the mast top. Two fixing slots are provided in the base of the mounting bracket to allow for final alignment.
The P296 sensor transmits a NMEA 0183 sentence as follows:
• $WIMWV,x.x,R,x.x,N,A*hh<CR><LF>
• Note that both wind direction and wind speed fields are variable to xxx.x
• Note that, at wind speeds above 100 knots, the status field will show V (invalid
measurement).
7080 Operation & Installation Handbook
1.4.5 Combined Wind and Weather Sensor P1003
Refer to separate Data Sheet covering supplied sensor.
1.5 Weather Sensor
A P1002 weather sensor can be connected into the P1100 MEU for 7080 system expansion.
1.5.1 P1002 Weather Sensor
Refer to separate Data Sheet covering sensor concerned.
1.6 General Materials Specification:
7070 Log Transducers and hull fittings. (used on 7080 system) Transducers can be supplied in the following materials.
Fixed type transducers made from LB4 bronze are for use in steel hulled and in wood/fibreglass hulled vessels. A fibreglass facing carries the sensing electrodes. The fibreglass is anti-fouled using: International Paints “Interspeed 2000”: White anti-fouling paint (non-conductive).
Fixed type transducers made from stainless steel; 316 S16 are for use in aluminium alloy hulled vessels. A fibreglass facing again carries the sensing electrodes. The fibreglass is again anti-fouled using: International Paints “Interspeed 2000”: White anti-fouling paint (non-conductive).
Hull Pads for steel hulled vessels are made from either, a) welding quality mild steel BS970 070M20 with the Phosphorous and Sulphur content, both equal to, or below, 0.045% or b) EN10025 5355J2G3.
Hull Pads for wood/fibreglass hulls are made from Aluminium Bronze NE5833 or equivalent. Hull Pads for aluminium hulls are made from Aluminium Alloy Grade NE4 [L44].
7080 Operation & Installation Handbook
Removable type log transducers are available for :-
a. steel hulled vessels.
b. wood/fibreglass hulled vessels.
Both types are made from extruded brass tube CZ121.
A fibreglass facing carries the sensing electrodes. The fibreglass is anti-fouled using: International Paints “Interspeed 2000” : White anti-fouling paint (non-conductive).
A seavalved hull fitting assembly is provided for housing the removable transducers. Two types are available; one for steel hulled vessels, the other for wood/fibreglass vessels.
For steel hulls :-
Hull Pad is made fromeither a) welding quality mild steel BS970 070M20 with the Phosphorous and
Sulphur content, both equal to, or below, 0.045% or b) EN10025 5355J2G3; to meet required international welding specifications.
For wood/fibreglass hulls :-
Hull Pads are made from aluminium bronze.
The Sea Valve is made from bronze to BS1400 LG2c and manufacturers Certificate of Conformity, Material Certification and Pressure Test Certificate are held on file. The seavalve hull fitting
assembly is further subjected to a factory pressure test, which may be witnessed by a Lloyds surveyor if required by customer, and stamped accordingly.
7080 Displays / Indicators.
Uses Din 43700 pattern: Din 144 x 144 enclosure. Casing is Aluminium Alloy.
Inner Frame: Zinc; die-cast and Outer bezel is moulded in black Polycarbonate. Front Window is Allyl Carbonate: Printed on rear face.
7080 Operation & Installation Handbook
Note : The above specifications may be altered without notice. Any changes made would not affect the functioning of the equipment and hull integrity would not be compromised.
1.7 Applicable Standards
The 7080 Log system conforms to the requirements set out in the following International Standards: IEC 61023 Ed. 3.0 (2007)
IEC 61162-1 Ed. 4.0 (2010) including IEC 61162-1 Corrigendum 1 (2013) IEC 60945 Ed. 4.0 (2002) + /Corr.1 (2008)
7080 Operation & Installation Handbook
2. INSTALLATION
2.1 All Log Transducers
The transducer will operate best if it is mounted in the forward part of the vessel, provided that under normal operating conditions, it remains in “solid” water. It must be remembered that in high speed planing craft, the fore part will be out of the water at high speeds and it will be necessary to choose a position somewhat further aft than on a displacement vessel of similar size. Care should also be taken to position it clear of any docking blocks. Internally, a dry space is required with access for servicing and away from any potential source of electrical interference such as large generators or cables carrying heavy currents.
A ‘boundary layer’ condition exists beneath any vessel. Within this layer, the velocity of the water differs from the true speed of the vessel through the water. As the sensing position is moved further aft, the thickness of this layer increases. This results in the signals from the transducer getting smaller and smaller. For this reason, the transducer should always be placed well forward. Where a bow thrust propeller is fitted to the vessel, a position below the athwartship’s tube and slightly forward of the tube centre line in a fore and aft direction may be found satisfactory and will often provide reasonable access inside the hull for wiring and servicing.
In addition to boundary layer considerations, it is generally found that a steadier speed indication is obtained from a forward fitted transducer. It should be remembered, of course, that the transducer MUST remain in ‘solid’ water under all reasonable sea conditions and when the vessel is in ballast.
7080 Operation & Installation Handbook
2.2 Fixed Log Transducers (drawings 2849/3/59,50,51)
The shell plating should have a hole cut in it to take the steel reinforcing pad (Item 1). THE TRANSDUCER MUST NOT REMAIN FITTED TO THIS PAD WHILST IT IS BEING WELDED TO THE HULL. It is not necessary for the axis of the transducer to be vertical when the vessel is viewed from the bow and normally no tapered pad will be necessary for its correct fitting. Having carried out the welding as shown in drawings 2849/3/59 and 2849/3/50, the pad should be allowed to cool and be examined for any ‘splashes’ of metal from the welding which may have stuck to the facing, or in the recess into which the transducer is fitted. It is essential that the face of the pad onto which the ‘O’ ring fits should be absolutely smooth in order to obtain a perfect seal. After welding, the external surface of the pad must be painted with a suitable smooth anti-fouling paint both to protect against corrosion and to ensure a clean surface over which the water can flow. The cable for the transducer is then passed through the aperture in the steel pad until most of it is within the vessel. A suitable flexible sealing compound should be smeared generously on the ‘O’ ring and the surrounding area of the transducer.
The transducer is then offered up to the pad and carefully inserted, making sure it’s ‘O’ ring stays in its correct position in the groove of the transducer flange. The transducer should be pushed up into the pad as far as possible where it will remain in position due to the adhesion caused by the sealing compound.
The stainless steel retaining ring (Item 2) should be passed over the cable and screwed onto the top of the transducer with the three stainless steel socket head screws slackened back so that the ring can be screwed down as far as the steel pad. By tightening the three socket head screws, little by little, the transducer body will be drawn up into its final position and the sealing compound forced out in an annular ring round the edge of the transducer flange outside the vessel. The retaining ring (item 2) will probably require repositioning i.e. screwing down a bit further as the sealing compound is forced out. The arrow on the top of the transducer must finally be aligned towards the flow of water, which is normally from the bow of the vessel, but may be a few degrees different where the curvature of the hull is such as to change the direction of the flow when the vessel is under way. The retaining ring should be finally screwed down as far as possible by hand and the three socket head screws evenly tightened until the transducer is secure and the ‘O’ ring compressed.
7080 Operation & Installation Handbook
Finally, wipe off the excess sealing compound from the transducer face MAKING SURE THAT THE ELECTRODES THEMSELVES (Item 3) ARE COMPLETELY CLEAN AND FREE FROM ANY GREASE, ANTI-FOULING PAINT etc. Ensure that the external part of the steel pad has been anti-fouled and provides a smooth surface over which the water can flow. Any anti-fouling used on the transducer face must be non-conductive and at all times the electrode beads must be clean and free of any paint or grease.
For aluminium alloy hulls the above procedure still applies, but the hull reinforcing pad is made from a suitable welding quality alloy and the transducer itself is manufactured in stainless steel and not bronze as referred to above.
Wood/fibreglass Hulls (drawing 2849/3/50)
A bronze cased transducer is used having a longer body than for steel hulls, in view of the extra thickness of the planking in wooden vessels. The reinforcing pad is replaced by an external bronze pad to be screwed or bolted to the hull concentrically with a hole of the appropriate diameter through the hull itself. A gasket is supplied for fitting between the pad and the hull and a suitable sealing compound should be used on both sides of that gasket before installation. The screws or bolts retain the pad in place when the transducer is removed from the hull.
2.3 Transducers with a seavalve (drawings 2900/4/1-1, 2905/4/2-1)
Two versions of the skin fitting with seavalve are available. One for steel hulls and the other for wood/GRP.
2.3.1 Skin fitting with seavalve for steel hulls (drawing 2900/4/1-1)
The valve is bolted to a steel reinforcing pad by means of the studs provided and a gasket fitted between the two faces. The steel pad is welded both internally and externally to the shell plating. After welding the external surface of the pad must be painted to protect against corrosion and to ensure a clean surface over which the water will flow.
7080 Operation & Installation Handbook
A brass flange containing an “O” ring seal is bolted to the top of the valve. A second “O” ring is compressed between the top of this flange and the flange on the transducer. Two steel pillars project upwards from the valve and a steel bridge piece holds them in position at the top.
A stainless steel lead screw is permanently fitted with a cross bar for rotation and hence provides for the raising and lowering of the transducer. This screw rotates in a bronze nut fastened to the centre of the bridge piece, and has the transducer attached to its lower end.
With the lead screw rotated anti-clockwise to the limit of its travel, the lower face of the transducer is approximately 10mm above the gate valve, which can, therefore, be closed.
By unbolting the upper bridge piece, the lead screw and transducer can be removed from the assembly.
A hole 154mm in diameter is cut in the hull. The seavalve should be detached from the steel pad, together with the lower gasket. The pad is then passed through the hole in the hull and welded both internally and externally. Note that the position of the tapped holes relative to the fore and aft line is not important, but the seavalve hand wheel can only be set in one of four positions. Where the position of the hand wheel is critical, it is suggested that the pad be tacked in place and the valve offered up to the pad temporarily, to ensure that the hand wheel is accessible. The valve should then be removed while the welding is completed. When the pad is cold the seavalve and its gasket should be positioned on the pad and fastened with the studs/nuts/washers provided.
The upper flange of the valve will have been supplied with the pillar assembly already in position. To fit the transducer, remove the two bolts/washers (Items 3 and 4) and detach the upper bridge piece (item 5) and lead screw (item 6). From the lower bridge piece (item 7) unbolt the two short pillars (items 8 and 9) and screw them into the top flange of the transducer. Attach the lead screw and lower bridge piece to these pillars with the hex head bolts supplied.
7080 Operation & Installation Handbook
With the seavalve closed, the transducer is entered into the upper flange and seal using a little grease on the brass tube. Keep the bridge piece in line with the main pillars so that when the transducer has entered the ‘O’ ring seal, it is not forced down onto the valve gate and damaged. The bridge piece should come to rest in its correct position against the tip of the pillars before the face of the transducer makes contact with the valve gate.
DO NOT ALLOW ANY GREASE TO GET ON THE BOTTOM FACE OR ELECTRODES.
Refit the bolts (item 3) not forgetting the lock washers. With the lead screw fully anti-clockwise the lower face of the transducer clears the valve gate, and therefore the valve can now be opened fully and the transducer wound down to its working position. This is with its lower face flush with the face of the steel pad.
The transducer has a dot or arrow engraved on its flange and this should point forward into the flow of water with the vessel moving ahead. The alignment can be corrected by using a bar or large screwdriver as a lever placed between the two short pillars (item 8) BEFORE the transducer is fully lowered into position.
When fitting a replacement with the vessel afloat, it will be necessary to open the valve slightly once the transducer has entered the ‘O’ ring seal. Otherwise the water trapped between the valve gate and its bottom face will prevent the transducer being fully entered into the valve chamber.
2.3.2 Skin fitting with seavalve for wood/GRP hulls (drawing 2905/4/2-1)
The valve is bolted through the hull to a bronze fairing block by means of studs provided. A brass flange, containing an ‘O’ ring seal for the transducer is bolted to the top of the valve. Two steel pillars project upwards from the flange/valve and a steel bridge holds them in position at the top of the assembly.
A stainless steel lead screw is permanently fitted with a cross bar for rotation and hence provides for the raising and lowering of the transducer. This screw rotates in a bronze nut fastened to the centre of the bridge piece with the transducer attached to its lower end. Rotation of the lead screw causes it to be raised or lowered.
7080 Operation & Installation Handbook
With the lead screw rotated anti-clockwise to the limit of its travel, the lower face of the transducer is approximately 10mm above the gate valve, which can therefore be closed. By unbolting the upper bridge piece, the lead screw and transducer can be removed from the assembly.
IMPORTANT : The Hull may need localised strengthening around the position of the seavalved skin fitting. This is more likely to be required in the case of GRP hulls and the installer must take note of GRP thickness at the position concerned. Weights involved are:
Transducer : 11.3 kg (including 50m cable)
Seavalved skin fitting : 24.7 kg
A hole 70mm in diameter is cut in the hull. The bronze fairing block should have the four studs screwed into it and offered up to the hull, having previously drilled four corresponding holes using the spacer (item 1) as a template.
Note that the orientation of the seavalve is not important and it should be positioned so that there is easy access to the hand wheel for opening and closing. The brass liner (item 2) should be inserted through the hull and into the fairing block, and the spacer (item 1) dropped over the liner and clamped down against the planking using the nuts provided. The thickness of the planking will not be known in advance and it is necessary for the liner to project above the spacer (item 1) by 8mm. After marking, cut or machine the liner to the correct length. It is essential that no ‘frays’ or sharp edges be left at either end which could prevent the transducer from passing through.
Having removed the liner and machined it, the fairing block and studs should be well covered with a suitable sealing compound and repositioned in the hull. The spacer should also be coated with a sealing compound paying particular attention to any irregularities in the planking as it is essential that a water-tight joint is produced between this spacer and the planking. A gasket (item 3) is positioned over the studs together with the sleeve (item 4) which helps register the valve. The valve should then be fitted to the assembly and bolted down by using the nuts and washers provided. The design is suitable for hulls up to 75mm thick. For thinner hulls, it may be necessary to shorten the studs so they clear the valve body.
7080 Operation & Installation Handbook
The upper flange of the valve will have been supplied with the pillar assembly already in position. To fit the transducer, remove the two bolts/washers (items 5 and 6) and detach the upper bridge piece (item 7) and lead screw (item 8), from the lower bridge piece (item 9). Unbolt the two short pillars (item 10) and screw them into the top flange of the transducer.
Attach the lead screw and lower bridge piece to these pillars with the hex head bolts supplied.
With the seavalve closed, the transducer is entered into the upper flange and seal above the valve, using a little grease on the brass tube. Keep the bridge piece in line with the main pillars so that when the transducer has entered the ‘O’ ring seal, it is not forced down onto the valve gate and damaged. The bridge piece should come to rest in its correct position against the top of the pillars before the face of the transducer makes contact with the valve gate.
DO NOT ALLOW ANY GREASE TO GET ON THE BOTTOM FACE OR ELECTRODES.
Refit the bolts (item 5) not forgetting the lock washers. With the lead screw rotated fully anti-clockwise, the lower face of the transducer clears the valve gate and, therefore, the valve should now be opened FULLY and the transducer wound down to its working position. This is with its lower face FLUSH with the face of the fairing block. The two nuts on the upper part of the lead screw should be rotated until the lower one is tight against the bronze nut in the upper bridge piece. The second nut is locked tightly against the other, so that at any future date, the transducer can be removed and refitted or replaced in the knowledge that the face of the transducer will indeed be flush with the outer face of the fairing block when wound down to this pre-determined position. THIS INITIAL SETTING PROCEDURE MUST BE DONE WITH THE VESSEL OUT OF THE WATER.
When fitting a replacement transducer with the vessel afloat, it will be necessary to open the valve slightly once the transducer has entered the ‘O’ ring seal. Otherwise the water trapped above the valve gate will prevent the transducer being fully entered into the valve chamber.
The transducer has a dot or arrow engraved on its flange and it should point forward into the flow of water, with the vessel moving ahead. This alignment can be corrected by using a bar or large
7080 Operation & Installation Handbook
screwdriver as a lever and placing it between the two short pillars (item 10) BEFORE it is completely lowered into position. The lead screw should be tightened down fully clockwise, using the cross bar fitted and HAND PRESSURE ONLY.
2.4 Log Transducer and cabling
Transducers are fitted with 50m of cable. The cable is permanently attached to the transducer and great care must be taken not to damage it. It is a special cable containing two twisted pairs, one pair screened, the other pair unscreened, with a final outer screen. One pair carry the a.c. supply energising the coil to produce a magnetic field in the “solid” water beneath the transducer face. The other pair is connected directly to the two sensing electrodes and brings the low level a.c. signal back from the ‘single turn’ generator formed by the “solid” water within the magnetic field at any instant.
It is the low level of this voltage, proportional to the vessel’s speed, which can cause problems when other unrelated a.c. voltages are induced into the cabling and interfere with the signal being measured. For this reason it is preferred that the transducer cable is encased in a solid steel pipe up to within a few centimetres of the Electronics Unit. Although the speed signal is synchronously detected after amplification, other high level induced voltages can interfere with the correct operation of the log. The steel pipe provides magnetic screening from adjacent cables carrying heavy alternating currents for other equipment. The normal non-ferrous braiding or screening does not prevent such pick-up. It is also good practice to use this pipe for earthing the electronics unit to the skin fitting or the hull adjacent the skin fitting, thus minimising any large earth current loops. This is particularly so, when problems are experienced with interference from high power MF & HF radio transmitters.
7080 Operation & Installation Handbook
2.5 Electronic / Control Unit; P1100
The electronic unit is contained in a metal box for bulkhead mounting. The unit can be considered as “splashproof” and all cable entries are glands. The mounting straps can be positioned either horizontally or vertically and the change is affected by slackening the retaining screws visible at the outside corners of the unit, and the straps repositioned as required before finally re-tightening the screws concerned.
IF THIS PROCEDURE IS CARRIED OUT, ENSURE THAT THE SCREWS ARE TIGHTENED SUFFICIENTLY TO ENSURE ELECTRICAL CONTINUITY BETWEEN MOUNTING STRAPS AND CASING.
It is intended that the unit is mounted close to the log transducer so that the transducer cable is kept as short as possible. The Electronic Unit must be in a position where it is protected from water. Access to the unit is necessary for diagnostics, servicing and log calibration purposes. The d.c. supply for the P1100 may either be taken directly into the electronic unit using its own on/off switch, or alternatively the unit’s switch may be left permanently on and a separate on/off switch connected in the supply to the log, and positioned to suit the particular installation. The latter is recommended as the d.c. supply, connected into the 24Vdc input on the 5 Ch. I/O board, means that the P1100’s own on/off switch does not totally isolate the instrument.
2.5.1 Wiring:
When connecting cables during installation, personnel involved must take full ESD (electrostatic discharge) precautions. The wearing of a suitable “grounding strap” is recommended.
2 core screened cable (0.5 CSA), is required for connecting to the 200 ppNM relay contacts in the Electronic Unit.
2 core screened cable (0.5 CSA), is required for connecting to any IEC 61162-1 (NMEA 0183) serial input or output on the 5 Channel I/O board in the Electronic Unit.
7080 Operation & Installation Handbook
2 core screened cable (0.5 CSA), is required for connecting to the IEC 61162-1 (NMEA 0183) serial outputs on the Transducer PCB in the Electronic Unit.
Always refer to the appropriate system block connection diagram.
NOTE that the casing of the Electronic Unit must have a good low impedance earth. Consequently, a suitable bonding must be provided directly to the ships earth from the unit. The steel pipe containing the transducer cable should be bonded at its upper end to the Electronic Unit, and the lower end of the steel pipe bonded to the hull adjacent to the transducer.
On wood/GRP vessels it is even more essential to have a good earth connection and it is suggested that such earthing be through to the steel pipe containing the transducer cable and the transducer skin fitting at the lower end.
In the interests of EMC, wherever practicable, cable screens should be bonded to earth. In the Electronic Unit, there are connection points provided for screen connections.
Due to variances in the outside diameter of the transducer cable it may be advantageous to use a smear of silicone grease on the outside of this cable before passing it through the gland concerned.
2.6 Power supply
Power should be supplied as a nominal 24 volts d.c. This incoming supply is stabilised down to 15 volts for use with the EM log and 5 volts for the microprocessor circuits. The Wind Interface also has it’s own voltage converter, running from the 24 volts supply. Provided the power supply for the log is free of any “ripple”, the log will function correctly with voltages from 19V minimum to 31.2 V maximum. Where the power is obtained from an a.c. mains power unit fitted to the vessel for this or other purposes, it may be found that a.c. “ripple” is superimposed on the d.c. output. In such cases, it is ESSENTIAL that the instantaneous voltage available never drops below 19V. If there is any doubt as to the suitability of the ship’s 24 volt d.c. supply and a.c. mains is available, it would be advisable to fit a small power unit specifically for the log. This power supply unit (P1010) is shown on drawing 3389-A3-7.
Power consumption (typical system): 20w (DC). Note: power surge, at switch on, 1.75A max. for 500msec.
7080 Operation & Installation Handbook
2.7 7070/7080 Displays / Indicators
These units can be mounted directly into a panel, with a cut-out suitable for a DIN 43700 case (144mm square bezel), as shown on drawing 3347-A3-71. This necessitates access to the rear of the panel, in order to fit and tighten the securing clamps provided. Alternatively, a cut-out, as shown on drawing 3419-A3-15, will allow the display to be fitted using the optional 02-071 mounting plate. Rear panel access would not be required if fitting in this way.
Power can be supplied from the P1100, 7080 Electronics Unit or from a local 24 volt d.c supply.
Note, however, that the (master) P1248 Log Data Display MUST share the same 24Vdc supply as the P1100 7080 Electronics Unit with the “reset” link on the Transducer PCB in the
standard R.H. position. (The Transducer PCB does have the ability to cope with a situation where
the main log data display can only be fed with a different 24Vdc supply from that feeding the Electronics Unit. Information is given in section 2.7.1 below). All terminals are situated on the rear of the indicator casing, and cable connections can be made before the instruments are fitted into the
panel.
2.7.1 Wiring:
When connecting cables during installation, personnel involved must take full ESD (electrostatic discharge) precautions. The wearing of a suitable “grounding strap” is recommended.
The main P1248 Log Data Display (speed and distance indicator) requires a 3 x twisted pairs cable with overall screen (cores 0.5 CSA min), for NMEA, power & “reset”. Note again that this indicator would normally share the same 24Vdc supply as the P1100 master electronics unit.
Additional P1248 Log Data Display/s would normally require a twin twisted pair cable (0.5 CSA min), for NMEA and power, which could be provided via the main P1248 Log Data Display. Refer
7080 Operation & Installation Handbook
The relay; RLY1 (N.O. and Com connections) of the main, or single, P1248, can be used to reset the TRIP distance in the LOG. RLY1 will be active for 1 second after the TRIP RESET button has been pressed for 5 seconds. This 5 seconds activation time is implemented to prevent accidental operation and reset of Trip distance.
The display will automatically go to Display Mode 2 (Log Speed and Trip Distance) after TRIP RESET has been pressed.
For TRIP RESET operation, with a common 24Vdc supply to both the P1248 and P1100 Master Electronics Unit (MEU), connect Terminal 12 on the LOG transducer board, in the MEU, to RLY1(N.O.) on the P1248 and connect RLY1(Com) to 0V, using permanent link on rear of the P1248 Display. The option link on the P1100 MEU transducer board must be in the Right Hand position (centre and R.H pin connected). See drawing 3419-A3-11 sheet 2.
For TRIP RESET operation with an independent 24Vdc supply into the main or single P1248 Display, connect Terminal 11 on the LOG transducer board, in the P1100 MEU, to the independent +24V. Connect Terminal 12 on the LOG transducer board, in the MEU, to RLY1(N.O.) on the P1248 and connect RLY1(Com) to the independent 0V, again using permanent link on rear of the P1248 Display. Note that the option link on the P1100 MEU transducer board must be in the Left Hand position (centre and L.H pin connected) for this configuration.
The P1249 wind data display, and P1255 weather data display both require a 2 core screened cable (0.5 CSA), for NMEA, together with a separate 2 core screened cable (0.5 CSA), for power.
7080 Operation & Installation Handbook
2.8 Wind Instruments
IF WIND SENSORS OTHER THAN THE P292 OR P296 ARE EMPLOYED, REFER TO DATA SHEETS FOR THE SENSORS SUPPLIED WITH THE SYSTEM.
2.8.1 Solid State Wind Sensor: (Ref: P292)
The unit should be mounted as high as possible in air which is undisturbed by movement over and around any structures and in a position to ensure a clear azimuth. The base flange must be attached to a suitable horizontal platform. For shipborne use, fitting high on the main mast is recommended as under adverse sea state conditions there would be less possibility of the sensor being frequently washed with sea water than if mounted forward.
Always check the installation to ensure the solid state sensor is not affected by other equipment operating locally, which may not conform to current standards, e.g. radio/radar transmitters, engines, generators etc.
Guidelines:
• Avoid mounting in the plane of any radar scanner – a vertical separation of at least 2m
should be achieved.
• Radio transmitting antennas; the following minimum separations (all around) are
suggested:-
• VHF IMM – 1m
• MF/HF – 5m
• Satcom – 5m (avoid likely lines of sight)
• Ensure that the system is connected in accordance with the diagram supplied and that
if a junction box is used ensure that cable screens are connected through to maintain EMC integrity.
2.8.1.1 Wiring:
The P293 sensor cable supplied is 4 core with an overall screen and has the connector attached. Standard cable length is 20 metres, but longer lengths; up to a maximum of 200 metres, can be supplied to order. The cable must be secured at regular intervals to eliminate any strain on the
7080 Operation & Installation Handbook
connector is rated at IP68. The cable is considered to be “class 2” in respect of its carried low voltage power and signal levels. Refer to section 2.8.3 and sub-sections 2.8.3.1 / 2.8.3.2 for full details concerning cable installation.
Cable information is as follows:
Power:- Red: = +24Vdc, Blue = -ve, (P292 power consumption 20mA max) Yellow = NMEA 0183 Signal Line A, Green = NMEA 0183 Signal Line B, Screen = Ground.
(Cable Assembly = ref: P293; if requiring replacement always specify length (or suffix letter; if known).
2.8.1.2 Sensor Orientation:
Orientation of the sensor tower is important. The unit must be mounted vertically on its base
mounting flange so that the datum marks; two arrows, a blue rectangle, and an alignment notch, point directly along the required measurement axis. On a vessel this would be pointing forward, towards the bow and be parallel with the fore-aft axis. On a static installation the sensor should be aligned with the datum marks pointing towards North. Provision must also be made for exiting the flying lead / connector beneath the sensor flange prior to connection; see drawing 3342-2-7. On
installation, always ensure that the connector is securely mated.
Slots in the base mounting flange allow for any final adjustment that may be deemed necessary to attain correct alignment. Simply slacken the three bolts concerned and rotate the unit on its base. Re-secure when the correct alignment is achieved.
If part installation is carried out with either the sensor assembly or the down cable assembly being fitted then it is important to protect the appropriate connector from the elements until it can be mated with its other half.
IMPORTANT:
The sensor is a precision instrument and care should be taken when handling.
If the unit is removed at any time, ensure that the in-line connector attached to the cable is suitably protected from the elements until such time as the sensor is refitted.
