Service
Manual
™
Third edition
Copyright © June 1997
Saab Marine Electronics AB
Service Manual
The contents, descriptions and specifications within this
manual are subject to change without notice. Saab Marine
Electronics AB accepts no responsibility for any errors that
may appear in this manual.
As each Saab TankRadar system is specially designed for
each delivery, the contents and illustrations in this manual
may differ from your system.
Guide to this manual
If there is a problem with you Saab TankRadar system, start
by reading the chapter 9 for information on how to find the
problem and how to fix it.
If you are not familiar with the Saab TankRadar system, read
chapter 1 to get an overview. If you need more information,
read the Technical Description, included in the "As-built
drawings and user's manual"-binder.
Use the index at the back of the manual to find the page with
the information you are looking for.
Complete service information
If your Saab TankRadar G3 is complemented with Saab
TankRadar MaC cargo control system including the Substation for handling of control input and output signals, there is
an additional Service Manual for these parts.
In this case the service information is divided in two parts:
• Consult this Saab TankRadar G3 Service Manual for
information on the Saab TankRadar G3.
• Consult the Service Manual for Saab TankRadar MaC
for information related to the control system's Substa-
tion and Redundancy Switch Box.
Information on how to operate the Saab TankRadar system
If you need information about the operation of the Work
Station or the Backup Display of the Level Unit, read the
Operating Manual included in the "As-built drawings and
user's manual"-binder.
Information about technical data of the Saab TankRadar system
If you need to look at the technical specifications of the Saab
TankRadar system, please read the Technical Description
included in the "As-built drawings and user's manual"binder.
2
Third edition, June 1997
Service Manual
Overview of Contents
Guide to this manual ............................................................................... 2
1 General Description of Saab TankRadar ...................................... 10
2 General Information....................................................................... 13
3 Work Station................................................................................... 15
4 I/O Box ............................................................................................. 55
5 Level Unit ........................................................................................ 59
6 Transmitters.................................................................................... 74
7 Temperature Sensors (Option) ..................................................... 83
8 Tank Display Unit (Option)............................................................ 86
9 Fault Finding on the Saab TankRadar System ............................. 88
10 Spare Parts .................................................................................... 103
11 Recycling of Saab TankRadar ....................................................... 104
12 Saab Marine Service Agents ........................................................ 105
Index ...................................................................................................... 107
Third edition, June 1997
3
Service Manual
Complete Table of Contents
Guide to this manual ............................................................................... 2
Complete service information ........................................................................... 2
Information on how to operate the Saab TankRadar system.......................... 2
Information about technical data of the Saab TankRadar system .................. 2
Abbreviations and Denominations:.................................................................... 9
1 General Description of Saab TankRadar ...................................... 10
1.1 Radar Principle...................................................................................... 12
2 General Information....................................................................... 13
2.1 Safety ..................................................................................................... 13
3 Work Station................................................................................... 15
3.1 Description of the Work Station’s Cabinet ........................................ 16
3.2 Replacing the Work Station’s Hard Disk ............................................ 16
3.3 Replacing a Work Station .................................................................... 16
3.4 Replacing a Board in the Work Station .............................................. 17
3.5 Screen Settings of the Work Station Monitor ................................... 18
3.6 Loading Software to a Work Station .................................................. 18
3.6.1 Install Program on Hard Disk of Work Station........................... 18
3.6.2 Install Database and Pictures on Hard Disk of Work Station ... 18
3.7 The Service Windows of the Work Station Software ....................... 19
3.8 Level Unit – Version Summary and Database Status........................ 20
3.9 Level Unit – Transmitter Data............................................................. 20
3.10 Level Unit – Temperature Data ........................................................... 26
3.11 Level Unit – IG Pressure Data............................................................. 28
3.12 Level Unit – Extra Sensor Data........................................................... 29
3.13 Level Unit – Trim/List Data .................................................................. 30
3.14 Level Unit – LCM 1 and 2 Status......................................................... 31
3.15 Level Unit – LCI Status ........................................................................ 33
3.16 Level Unit – LI Status ........................................................................... 35
3.17 Level Unit – Backup and Local Display ............................................... 36
3.18 Level Unit – LCI Com Ports ................................................................ 38
3.19 Level Unit – Relays................................................................................ 39
3.20 Level Unit – Work Station Communication ...................................... 40
3.21 Level Unit – Any Register..................................................................... 41
3.22 Level Unit – LCI, LCM Version............................................................. 43
3.23 Level Unit – Load Program.................................................................. 44
3.24 Level Unit – Up/Download Database .................................................. 45
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Third edition, June 1997
Service Manual
3.25 Level Unit – TX Service ....................................................................... 46
3.26 Level Unit – Scan Tank ......................................................................... 47
3.27 Level Unit – Restart LCI, LCM ............................................................ 47
3.28 Level Unit – IG Press Zero Adjust ....................................................... 48
3.29 Disconnect LU ...................................................................................... 49
3.30 The Communication-Window ............................................................ 49
3.31 The I/O-Window ................................................................................... 50
3.32 Install/Backup-Window ........................................................................ 51
3.32.1 Backup Copies of the Database and Pictures .............................. 51
3.32.2 Install Database and Pictures ........................................................ 52
3.32.3 Installing New Program to the Work Station .............................. 52
3.32.4 Saving a Log-file to a Diskette....................................................... 52
3.33 Service Log-Window ............................................................................ 53
3.34 Process Debugger, Interface Editor, PictCopy, Shell ......................... 54
4 I/O Box ............................................................................................. 55
4.1 The Motherboard of the I/O Box ........................................................ 56
4.1.1 Watch Dog LED ............................................................................... 56
4.1.2 Communication LEDs .................................................................... 57
4.1.3 Power LED ....................................................................................... 57
4.1.4 Relays ................................................................................................ 57
4.1.5 Power Setting ................................................................................... 57
4.2 RS-232 Interface Board ........................................................................ 57
4.3 RS 485 Interface Board ........................................................................ 57
4.4 SIOX Interface Board........................................................................... 58
4.5 PRS Interface Board ............................................................................. 58
5 Level Unit ........................................................................................ 59
5.1 Description of the Level Unit .............................................................. 59
5.2 Information Flow within the Level Unit ............................................. 60
5.3 Restarting the Level Unit..................................................................... 61
5.4 Description of the Calculation Unit.................................................... 61
5.5 Signal Board, LCS ................................................................................. 62
5.5.1 Replacing a LCS............................................................................... 62
5.6 Processor Memory Board, LCM .......................................................... 62
5.6.1 Replacing the LCM ......................................................................... 62
5.7 Interface Board, LCI ............................................................................. 63
5.8 Trim/List Unit, LT ................................................................................. 65
Third edition, June 1997
5.7.1 Troubleshooting the LCI................................................................. 63
5.7.2 Replacing the LCI ............................................................................ 64
5.8.1 Replacing the Trim/List Unit ........................................................ 65
5.8.2 Adjusting the Trim/List Unit ........................................................ 66
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Service Manual
5.9 Backup Display, LCB ............................................................................. 68
5.9.1 Replacing the Backup Display ...................................................... 68
5.9.2 Description of the Service Frames ................................................ 68
5.9.3 Unit Frame ....................................................................................... 68
5.9.4 Local Display Frame ....................................................................... 69
5.9.5 Register Frame ................................................................................. 69
5.9.6 FiltDist Frame .................................................................................. 69
5.9.7 Amplitude Frame ............................................................................ 70
5.10 Transmitter Interface, LI ...................................................................... 70
5.10.1 Cabling.............................................................................................. 70
5.10.2 Configuration of the Transmitter Interfaces ................................ 70
5.10.3 Power supply to the Transmitter Interface .................................. 71
5.10.4 Ground Failure Indication ............................................................. 71
5.10.5 Addressing the Transmitter Interface........................................... 71
5.10.6 The Analog/Digital/Power Board (LIA)..................................... 71
5.10.7 The Zener Barrier Board (LIZ)....................................................... 72
5.10.8 Removing a Transmitter Interface (LI) ......................................... 72
5.10.9 Replacing a LIZ or a LIA ................................................................ 72
5.10.10 Replacing a Transmitter Interface (LI).......................................... 73
5.11 Power Block........................................................................................... 73
5.11.1 Fuses in the Power Block ............................................................... 73
5.11.2 Replacing the Power Block ............................................................ 73
6 Transmitters.................................................................................... 74
6.1 Replacing an Electronic Box ................................................................ 75
6.2 Transmitter Test Cable ......................................................................... 77
6.3 Cleaning the Antenna ........................................................................... 78
6.3.1 Cleaning the Parabolic Antenna ................................................... 78
6.3.2 Brush cleaning the Parabolic Antenna ......................................... 78
6.3.3 Cleaning by Hand ........................................................................... 79
6.3.4 Cleaning the Cone Antenna........................................................... 79
6.4 Inert Gas Pressure Sensor (Option) ................................................... 80
6.4.1 Cleaning the Inert Gas Pressure Sensor ....................................... 81
6.4.2 Replacing the Inert Gas Pressure Sensor ..................................... 81
6.4.3 Zero Pressure Calibration of IG Pressure Sensor........................ 81
6.5 Dismounting of Antenna Feeder of the Parabolic Antenna ............. 82
6.5.1 Disassembly ..................................................................................... 82
6.5.2 Reassembly:...................................................................................... 82
7 Temperature Sensors (Option)..................................................... 83
7.1 Checking a Temperature Sensor ......................................................... 83
7.2 Replacing a Faulty Temperature Sensor ............................................. 85
8 Tank Display Unit (Option)............................................................ 86
8.1 Replacing a Tank Display Unit.............................................................. 86
8.2 Checking the Tank Display Power Supply Unit .................................. 87
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Third edition, June 1997
Service Manual
9 Fault Finding on the Saab TankRadar System ............................. 88
Abbreviations used in the fault finding chart: .......................................... 88
9.1 SysFail and Warning Messages Shown on the Work Station ........... 88
9.1.1 SysFail message: Level Unit SysFail. ....................................... 88
9.1.2 SysFail message: Level Unit Communication Failed. ........... 88
9.1.3 SysFail message: Level Unit Power Failure. ........................... 89
9.1.4 SysFail message: Level Unit LI Communication Failed. ...... 89
9.1.5 SysFail message: I/O Box Communication Failed. ............... 89
9.1.6 Warning message: Level Unit Ground Failure....................... 89
9.1.7 Warning message: Level Unit Memory Failure. .................... 90
9.1.8 Warning message: Level Unit Restarted. ................................ 90
9.1.9 Warning message: Master Communication Failed. ............... 90
9.1.10 Warning message: LevelDatic Communication Failed. ........ 90
9.1.11 Warning message: SIOX Communication Failed. .................. 91
9.1.12 Warning message: PRS Communication Failed. .................... 91
9.2 Other Messages Shown on the Work Station .................................... 91
9.2.1 Message: PROCESS DATABASE NOT RUNNING - Alarm
handling is off and pictures are not updated. Please wait
until system restart..................................................................... 91
9.2.2 Message: NO CONTACT WITH MASTER WORKSTATION Network Error or Master Work Station not running. Please
wait until connection established............................................. 91
9.3 Channels with status CFAIL, ERROR or INVAL................................ 92
9.3.1 CFAIL status on one Transmitter.............................................. 92
9.3.2 CFAIL status on five Transmitters ............................................ 92
9.3.3 ERROR status on one Transmitter, but not CFAIL status ..... 92
9.3.4 Warning “Clean antenna on tank XXX” .................................. 93
9.3.5 All warnings associated with one tank shown on Work Sta-
tion ................................................................................................ 93
9.3.6 ERROR status on one temperature sensor.............................. 93
9.3.7 INVAL status on average temperature.................................... 93
9.3.8 ERROR status on one IG pressure sensor ............................... 93
9.4 Work Station ......................................................................................... 93
9.4.1 Work Station screen blank. ........................................................ 93
9.4.2 Work Station monitor image located incorrectly, distorted or
discolored. ................................................................................... 94
9.4.3 No new windows can be opened on the Work Station or
Work Station cannot be started................................................. 94
9.4.4 Light Pen is not functioning...................................................... 94
9.5 Level Unit .............................................................................................. 94
9.5.1 Backup Display is blank. ........................................................... 94
9.5.2 No response when pressing the keys on the Backup Display’s
keyboard. ..................................................................................... 94
9.5.3 Watch Dog LED on LCI board is on (the lowest LED).......... 94
9.5.4 Backup Display shows “No flash program” .......................... 94
Third edition, June 1997
7
Service Manual
9.6 Transmitters .......................................................................................... 95
9.6.1 Ullage indication not updated close to empty tank. ............. 95
9.7 Local Display ......................................................................................... 95
9.7.1 Local Display blank.................................................................... 95
9.8 Temperature Measurement................................................................. 95
9.8.1 Incorrect temperature values on one tank .............................. 95
9.9 Inert Gas Pressure Measurement ....................................................... 95
9.9.1 Incorrect reading of the IG pressure ........................................ 95
9.9.2 Indicated inert gas pressure always the same........................ 96
9.10 Tank Display Unit.................................................................................. 96
9.10.1 Display on TDU not working. .................................................. 96
9.11 Portable Readout System: ................................................................... 96
9.11.1 Indication of communication error (CERR) on PRU. ............ 96
9.11.2 No voice communication between walkie-talkie and base
9.11.3 No display on PRU..................................................................... 96
9.12 Draft measurement.............................................................................. 97
9.12.1 Draft measurement incorrect .................................................... 97
radio (PRS). .................................................................................. 96
9.13 Load Calculator .................................................................................... 97
9.13.1 Values displayed on TankRadar and load calculator differ.. 97
9.14 Finding Cause of Ground Failure Warning......................................... 98
9.14.1 Ground Failure – Transmitter Interface ....................................... 98
9.14.2 Ground Failure – Transmitter Cable............................................. 98
9.14.3 Ground Failure – Temperature Sensors ....................................... 98
9.14.4 Ground Failure – IG Pressure Sensor ........................................... 99
9.14.5 Ground Failure – Extra Temperature Sensors ............................. 99
9.14.6 Ground Failure – Local Display .................................................... 99
9.14.7 Ground Failure – Wire Terminals ............................................... 100
9.14.8 Checking a Cable for Ground Failure ........................................ 100
9.14.9 Checking a Wire Terminal for Ground Failure ......................... 100
9.15 Comparing Ullages ............................................................................. 101
10 Spare Parts .................................................................................... 103
10.1 Standard Spare Parts Set, 9150065-981 ........................................... 103
10.2 Extended Spare Parts Set, 9150065-982........................................... 103
10.3 Complete Spare Parts Set, 9150065-983.......................................... 103
11 Recycling of Saab TankRadar ....................................................... 104
12 Saab Marine Service Agents ........................................................ 105
Index ...................................................................................................... 107
8
Third edition, June 1997
Abbreviations and Denominations:
The following abbreviations are used in this manual:
LC - Calculation Unit
LCB - Backup Display
LCI - Interface Board
LCM - Processor Memory Board
LCP - Calculation Unit Power Supply
LCS - Signal Board
LI - Transmitter Interface
LIA - Analog/Digital/Power Board
LIZ - Zener Barrier Board
LP - Power Block
LU - Level Unit
TX - Transmitter
WS - Work Station.
Service Manual
Third edition, June 1997
9
Service Manual
1 General Description of Saab TankRadar
Saab TankRadar is made up mainly by the following parts:
• Transmitters
• Level Unit
• Work Station.
These units are shown in figure 1-1 below.
All Saab TankRadar Marine transmitters are intrinsically
safe, providing a number of benefits for the operator. There is
a high degree of safety built into the system. Since its impossible for electrical faults to cause an igniting spark, the equipment can be serviced at any time, even though the ship is in
operation.
Portable
Readout
Unit
Electro
pneumatic
level gauging
system
(ballast etc.)
Portable
Readout
System
Base Radio
Ship host
computer
system
Overfill and
high level
alarm
system
98%
98%
98%
Pt 1
Ct 1
St 1
95%
95%
95%
98%
98%
98%
Pt 2
Ct 2
St 2
95%
95%
95%
98%
98%
98%
Pt 3
Ct 3
St 3
95%
95%
95%
ON OFF
ALARM
LAMP
ACCEPT
HOLD
TEST
HORN FLASH
Cone Antenna
Transmitter
with IG Pressure
Sensor
Analog
in/outputs
Digital
in/outputs
Temperature
Sensors
%
SAAB
100
*
80
HH
H
60
H
L
40
L
LL
R
20
COMMON
ALARM
0
m
Load
calculator
Tank
Display
Units
%
%
%
SAAB
SAAB
SAAB
100
100
100
*
*
*
80
80
80
HH
HH
HH
H
H
H
60
60
60
H
H
H
L
L
L
40
40
40
L
L
L
LL
LL
LL
R
R
R
20
20
20
COMMON
COMMON
COMMON
ALARM
ALARM
ALARM
0
0
0
m
m
m
Parabolic Antenna
Transmitter with
IG Pressure
Sensor
Work
Exit all
Help
Wed Aug 24 20:05:30 1994
Saab TankRadar
Window Overview Setup Group Trend Alarm
Cargo System Fore
ExitBack
CT1
CT2
CT3
CT4
Ullage
Ullage
Station
Ullage
Ullage
1.559 m
8.502 m
5.630 m
1.956 m
0.00 m/h
0.00 m/h
0.00 m/h
0.00 m/h
T=19.1
T=19.1
T=19.1
T=19.1
T=18.7
T=18.7
T=18.7
T=18.7
T=18.6
P
T=18.6
P
P
P
T=18.6
T=18.6
T.avg
T.avg
T.avg
T.avg
18.8 C
18.8 C
18.8 C
18.8 C
LC1
LC3
LC5
LC7
LC2
LC4
LC6
LC8
23 bar
20 bar
24 bar
26 bar
BuzzerStop
Accept
2...more
m
(2,000)
1,837
CT 6 Ullage
Hi.Hi
Alarm
I/O
Box
Level
Unit
7890
456
M
123
ENT CLE
Printer
To Saab TankRadar MaC
Local
Display
Temperature
Sensors
Help
Wed Aug 24 20:05:30 1994
Saab TankRadar
Window Overview Setup Group Trend Alarm
Cargo System Fore
CT1
CT2
CT3
CT4
Ullage
Ullage
Ullage
Ullage
1.559 m
8.502 m
5.630 m
1.956 m
0.00 m/h
0.00 m/h
0.00 m/h
0.00 m/h
T=19.1
T=19.1
T=19.1
T=19.1
T=18.7
T=18.7
T=18.7
T=18.7
T=18.6
P
T=18.6
P
P
P
T=18.6
T=18.6
T.avg
T.avg
T.avg
T.avg
18.8 C
18.8 C
18.8 C
18.8 C
LC1
LC3
LC5
LC7
LC2
LC4
LC6
LC8
23 bar
20 bar
24 bar
26 bar
Accept
2...more
m
(2,000)
1,837
CT 6 Ullage
Hi.Hi
Alarm
Optional
Work
Stations in
network
Exit all
ExitBack
BuzzerStop
Figure 1-1 shows the TankRadar system with a number of the available options.
10
Third edition, June 1997
Figure 1-2. Parabolic
Antenna
Service Manual
The Saab TankRadar system is the main part of the Saab
Cargo Control system which includes the following optional
features:
• Cargo control functions with Saab TankRadar MaC
• Ballast level gauging and draft gauging with the
LevelDatic system
• Overfill and high level alarm system with Omicron
system
• Load calculation with Kockumation’s LoadMaster
The Work Station is used by the operator for monitoring of
tank ullages, temperatures, inert gas pressures and all the
other data that is handled by the Saab TankRadar. The Work
Station does the alarm handling of the measured values. The
Work Station communicates with other systems, such as load
calculators and electro-pneumatic level gauging systems (for
ballast etc.) and supervises the Transmitter and Level Unit
computers.
Figure 1-3. Cone Antenna
The Level Unit contains terminals for the intrinsically safe connection of the Transmitters. It contains the electronics used for processing the signals from the Transmitters, for calculating the tank parameters, such as trim/list corrected ullage, and for communicating with the Work Station.
The Transmitters measure the distance to the product surface
using a continuous radar signal. The Transmitters have an
Electronic Box that generates and processes the radar signal.
There are two types of Transmitters, one standard type with
a high performance Parabolic Antenna and another with a
Cone Antenna.
Optional equipment for each tank, such as temperature
sensors, inert gas pressure sensor or the Local Display, is
connected to a wire terminal inside the transmitter housing.
The inert gas pressure sensor is placed inside the transmitter
housing. The Local Display can display ullage, average temperature and inert gas pressure of the tanks.
Third edition, June 1997
11
Service Manual
1.1 Radar Principle
The radar transmitter on top of the tank emits microwaves
directed by an antenna towards the surface of the tank content. The echo from the surface is picked up by the antenna
again, and the difference in frequency between the transmitted and the reflected signal is directly proportional to the
measured distance, i.e. the ullage indication.
The radar waves are not affected by the atmosphere inside
the tank - aggressive chemicals, thick, sticky liquids or any
other tank media can be measured without restrictions.
The ideal condition for ullage measurement is a stable cargo
surface perpendicular to the radar beam.
Trim or list, foam and waves on the cargo surface and bottom
sludge weakens the radar echo. However, the radar echo is
usually strong enough for reliable measurements.
But in exceptional cases the radar echo can be lost during
turbulent loading/discharging, or with strong trim/list
angles, or when measuring close to the tank bottom.
Figure 1-4. An inclined cargo
level weakens the radar echo.
Trim/list angles of more than +
3
°
can lead to error in the
ullage measurement.
Figure 1-5. Waves on the
surface give a scattered and
weakened echo signal. Turbulent loading and discharging,
especially close to empty tank,
can lead to error in the ullage
measurement.
12
Third edition, June 1997
2 General Information
Note: If TankRadar system needs to be switched off, check with
officer in charge that it is OK to interrupt the operation of the
system.
2.1 Safety
When connecting equipment in hazardous areas, certain
requirements must be fulfilled to provide protection against
explosion . There are requirements both for the equipment in
the hazardous area on deck and for the associated equipment
in non-hazardous area.
The Saab TankRadar system is intrinsically safe and meets
the requirements of all the major classification societies. The
Transmitters and deck units connected to them, have the
following safety approval code:
• EEx ia IIC T4 according to EN50014 and EN 50020
(European Norm)
Service Manual
All other optional equipment such as Portable Readout System, separate high level alarm system, supplied by Saab
Marine Electronics, placed in hazardous areas, is also intrinsically safe and meets the requirements of all the major classification societies.
Intrinsic safety is based on the principle of restricting electrical energy available in hazardous-area circuits, so that any
sparks or hot surfaces, that may occur as a result of electrical
faults in components, are too weak to cause ignition. To
accomplish this, zener diodes and current limiting resistors
in the Level Unit restrict the maximum voltages and currents
into the Transmitters.
Intrinsic safety is the only technique accepted for Zone 0
hazardous areas. It is also safe for the crew or the service
personnel and it allows the equipment to be maintained
while the ship is in operation.
IMPORTANT!
For trouble shooting and repair work of intrinsically safe
equipment or associated equipment, the following rules need
to be strictly followed:
Third edition, June 1997
- Working permit
- Use only original spare parts from Saab Marine Electronics. Any replacement with non-recognized spare
parts will jeopardize the intrinsic safety.
13
Service Manual
- Use only a certified battery operated multimeter.
- Disconnection of live units in hazardous area is allowed. However, when replacing for example an Electronic Box, it is recommended to disconnect its wiring
in the safe area (in the Level Unit).
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Third edition, June 1997
3 Work Station
Saab TankRadar
Window Overview Setup Group Trend Alarm
P
Hi.Hi
Alarm
Cargo System Fore
CT3
CT4
Ullage
Ullage
5.630 m
1.956 m
0.00 m/h
0.00 m/h
T=19.1
T=19.1
T=18.7
T=18.7
P
P
P
CT 6 Ullage
T=18.6
T=18.6
T.avg
T.avg
18.8 C
18.8 C
LC5
LC7
LC6
LC8
24 bar
26 bar
m
(2,000)
1,837
Wed Aug 24 20:05:30 1994
CT2
Ullage
8.502 m
0.00 m/h
T=19.1
T=18.7
T=18.6
T.avg
18.8 C
LC3
LC4
20 bar
2...more
Service Manual
Exit all
Help
ExitBack
CT1
Ullage
1.559 m
0.00 m/h
T=19.1
T=18.7
T=18.6
T.avg
18.8 C
LC1
LC2
23 bar
BuzzerStop
Accept
Optional wooden box for
PC when located under
monitor
Figure 3-1 shows the Work Station.
The Work Station is operated with a light pen. With the light
pen, the operator just points directly on the screen to activate
various functions. For input of, for example alarm limits, a
keyboard is included.
There is an on-line Help-function, providing direct access to
relevant help texts.
As an option, a number of Work Stations can be placed in
different locations and connected in a network, sharing data
and processing power with each other.
New software can be downloaded from the Work Station to
the various units in Saab TankRadar. The Work Station is also
used for on board configuration and service of the Transmitters, the Level Unit and the Work Station itself.
The Work Station-software runs under the real-time operating system QNX.
The operation of the Work Station is described in the Operating Manual. However, the Service part of the Work Station
software is described in this manual in chapter 3.7.
Third edition, June 1997
15
Service Manual
3.1 Description of the Work Station’s Cabinet
Caution: Always turn the Work Station PC off before removing
any cables at the back of the PC.
Note: On the inside of the Work Station there are parts that are
sensitive to static electricity. Be careful not to expose any of the
components inside to static electricity. Always ground yourself by
using a grounding wrist band or by touching something that is
grounded, before touching any of the components inside the Work
Station.
See maker’s manual (Hewlett-Packard) for description of the
Work Station PC. This is enclosed in the Saab TankRadar G3
manual binder.
The principle connection of the Work Station is shown on the
drawing “Work Station Connection - Principle Diagram” in
the “As-built drawings and user’s manual”-binder.
3.2 Replacing the Work Station’s Hard Disk
See chapters 9.2.1 and 9.2.5 in fault finding section for information on when to change the hard disk of the Work Station.
Remove the Work Station
1. Turn the power off.
2. Disconnect the mains lead.
3. Remove the PC from the ruggedizing kit.
4. See maker’s manual (Hewlett-Packard) for detailed
information on how to replace the hard disk.
3.3 Replacing a Work Station
Replace the Work Station either with a spare one or by replacing a master Work Station with a slave, if more than one
Work Station is included in the system. See fault finding
chapters 9.2.1 and 9.2.2 for more information on when it
might be necessary to replace the Work Station.
1. Remove all the connectors from both the slave and the
master Work Station.
2. On both Work Stations – remove the monitor as well as
front and top cover following the instructions in chapter 3.2.1 above.
3. Remove all optional boards (normally the Serial Interface Board and the Network Board) and place them in
the new Work Station or Slave Work Station. Make a
note of the ethernet address printed on the Network
Board.
4. Replace the covers and replace the monitor.
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Service Manual
5. Connect all connectors (that were previously connected
to the master) to the new master Work Station.
6. Start the new master Work Station.
7. Install program according to the instructions in chapter
3.6. During the installation, select this Work Station as
the master.
8. Install database according instructions in chapter 3.32.
9. Restart the Work Station by pressing the Reset-button
on the front.
If you have made a slave Work Station become a master,
follow the steps below to configure it as a master Work Station.
10. Open the Work Stations-window in the Configure part
of the Work Station software. Make a note of the
ethernet addresses.
11. Exchange the ethernet addresses between the master
and the slave Work Stations. Check that the address
corresponds with the note you made in step 3 above.
12. Restart the Work Station by pressing the Reset-button
on the front.
3.4 Replacing a Board in the Work Station
There are one or more boards, such as Light Pen Interface
Board, Serial Interface Board, Network Board, placed in the
Work Station. If you need to replace any of these boards,
follow the instructions below.
1. Remove the Work Station from its ruggedizing kit. For
opening the Work Station PC, follow the instructions in
the maker’s manual (Hewlett-Packard) enclosed in the
Saab TankRadar G3 manual binder.
2. Remove the faulty board’s connectors at the back of the
Work Station. Remove the faulty board. In some cases it
might be necessary to remove more than one board to
reach the faulty board.
3. Replace it with a new board. Connect cables to the
boards. If you are replacing a Network Board, make a
note of the ethernet address printed on it.
4. Mount cover of the Work Station.
5. Mount the Work Station on its ruggedizing kit and
connect monitor and other peripheral units.
6. If you have replaced a Network Board, open the Work
Stations-window in the Configure part of the Work
Station software.
7. Enter the ethernet address of the new board.
8. Restart the Work Station by pressing the Reset-button
on the front.
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Service Manual
3.5 Screen Settings of the Work Station Monitor
There are a number of controls below the monitor’s screen.
Whenever the picture on the screen looks distorted or incorrect, changing the screen settings may produce a better picture.
See maker’s manual (Hewlett-Packard) in the Saab TankRadar G3 manual binder for information on the monitor controls.
3.6 Loading Software to a Work Station
Follow the instructions below to install new software onto
the hard disk of the Work Station. This needs to be done, for
example, if the hard disk has been replaced.
The software consists of three parts: program, database and
pictures. This is complemented with your own backup copy
of database and pictures.
The program is stored on diskettes that are stored on board.
The first diskette is a boot-diskette which means that the PC
can be started on that diskette.
If any other diskette is in the drive when powered on, the
operator will be notified to remove it.
3.6.1 Install Program on Hard Disk of Work Station
1. Slide the Boot-diskette into the disk drive of the Work
Station.
2. Restart the Work Station by pressing the Reset button
on the front of the PC. The Work Station will now restart on the Boot-diskette in the disk drive.
3. Follow the instructions on the screen to install the new
program.
4. When the installation is finished the Work Station will
restart using the new program.
3.6.2 Install Database and Pictures on Hard Disk of
Work Station
Database and pictures are stored on a diskette. At the delivery of the TankRadar system, a diskette with files for database and pictures is included. As you make changes to your
system you should make backup copies of your database and
pictures. See chapter 3.32.
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Follow the instructions in chapter 3.32 to install database or
pictures onto the hard disk of the Work Station.
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Service Manual
3.7 The Service Windows of the Work Station Software
A number of the actions in the fault finding section at the end
of this manual suggest operations done on the Work Station.
The Service functions are protected by passwords. The Captain-password is required when:
- installing or backing up database and software in the
Service part of the Work Station software,
- downloading or uploading database to Level Unit or
Work Station in the Service part of the Work Station
software,
- adjusting IG pressure to zero in the Service part of the
Work Station software,
- disconnecting a channel,
- changing the Operator-password.
All other functions in the Service part of the Work Station
software require the Service-password. Contact Saab Marine
Electronics or one of the service agents to receive the Servicepassword. See list of service agents in chapter 12.
Hit the Window-button at the top of the Work Station screen.
Hit the Service-item on the menu to open the Service submenu. See figure 3-2.
In the service windows, the dynamic data and database
values are in separate boxes. Most of the data in the database
boxes can be changed. Where there is data that can be
changed (shown as underscored), there are two buttons;
Figure 3-2 shows the
Service menu and sub-
Third edition, June 1997
menu.
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Service Manual
Undo and Save. Any data that is changed in these windows
is stored according to the settings in the destination part of
the Level Unit-window described below. The Undo-button
will change an entry, but only if it has not been saved. Once
you press the Save-button you cannot undo the entry (unless
you enter the previous value and press save again).
3.8 Level Unit – Version Summary and Database Status
This window shows the version and status of the databases
and programs in the LCI and LCMs. You can also see if one
or two LCMs are used.
There are status boxes for the different programs as well as
the dates for the last changes of the database in the Level
Unit.
This information can be useful if you need to contact Saab
Marine Electronics or one of the service agents.
3.9 Level Unit – Transmitter Data
[Window/Level Unit/Register/Tank Data/Transmitter]
The Transmitter Data-window shows the dynamic data from
a Transmitter, as well as the Transmitter’s status. The various
tank distances stored in the database are displayed in this
window. You can change these values in this window. It is
also possible to set the Level Unit to a one-tank measurement
mode, see chapters 3.25 and 3.14. It is also possible to restart
the transmitter by hitting the Restart Tank-button.
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Service Manual
Note: When setting the Level Unit into one-tank measurement
mode, there is no measurement on the other tanks.
Select a new tank by hitting the Tank-button or by hitting the
up or down arrow keys.
The tank number is the internal number in the TankRadar
system and is useful when setting the addresses on the optional Tank Display Units, see chapter 8.1. It is also the number that is used when communicating with other systems
such as load calculators or ship host computers.
The tank address corresponds to the terminal on the Transmitter Interface to which the Transmitter is connected. Tank
addresses 1-15 are connected to LI 1, addresses 16-30 to LI 2,
31-45 to LI 3 and 46-60 to LI 4.
The tank address is usually the same as the tank number.
However, they do not need not be the same.
The dynamic data is status or data that is continuously being
measured and presented. These values can not be changed
by the operator.
Third edition, June 1997
• Ullage is the distance from the TankRadar reference
point down to the surface of the product in the tank.
Innage is the distance from the bottom up to the surface
of the product.
• Level rate is the rate at which the surface of the product
moves as the tank is loaded or discharged. Positive
values indicate that the surface moves upwards.
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Service Manual
• Distance is the distance from a separate ullage plug,
included, to the surface of the product in the tank. It is
the ullage plus the A-distance and is T/L-corrected.
• Filter center is the location of the center of the measur-
ing filter during the last sweep. This value is normally
very close to the ullage value. It can differ when the
surface is close to the bottom of the tank or close to a
disturbing echo.
• Time stamp is a counter that shows that the transmitter
is operating.
• T/L corr cog shows the correction value used to adjust
the ullage value from the TankRadar reference point to
a trim and list corrected value at the center of gravity in
the tank. The centre of gravity is in this case the center
of gravity of the product’s surface (COF) when it is at
the 98% filling (volume) in the tank.
• T/L corr plug is the trim and list corrected ullage at a
separate ullage plug (same as A-measure).
• Ampl prefilt is the amplitude of the incoming signal
from the transmitter before it has passed any filters.
• Ampl postfilt is the amplitude of the filtered signal.
This is normally the strength of the surface echo. Read
the Amplitude postfilt when using the Transmitter Test
Cable, see chapter 6.2.
• Noice threshold. Any echoes with amplitudes less than
the noice threshold do not interfere with the measurement. This value is set to 350 mV as default. A normal
echo from an oil surface has an amplitude (Ampl
postfilt) of approximately 1500 to 2500 mV.
• Com err freq. Shows the frequency of communication
errors. Its value should be less than 10 (%/10). A larger
value could be an indication of, for example bad wiring.
The system should have been running for at least 15
minutes before this value shows a reliable figure. A true
indication of the communication performance is available after a few hours operation.
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The Transmitter status are shown as check boxes.
• TX comfail indicates that the transmitter is not commu-
nicating. This produces an alarm on the alarm row.
• TX failure. No echo has been found. The transmitter is
ordered to wait for a minute, then it starts searching
again. The ullage values displayed are the last valid
values. The ullage is not updated as long as TX failure
is checked.
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Service Manual
• TX ID switch on is checked when the button on the
Service Display is pressed or when positions 4 and 30
on WT500 on the transmitter has been jumpered.
• Corr plug inval is checked when the trim and list correction of the ullage cannot be done or when the calculation produces erroneous results. This holds true for
the Corr cog inval as well. This could be caused by
totally incorrect distances from the TankRadar Reference point to the tank’s reference point (center of gravity or separate ullage plug).
• TX active is checked when the LCM board requests the
transmitter to measure. However, this checkbox does
not automatically mean that the transmitter is working.
• Searching. The transmitter has lost the echo but is
searching for it.
• TX com timeout. A temporary break in the communica-
tion with the transmitter. Does not cause an alarm. The
box can be checked for a short while. However if it
remains for some time, the TX sens fail status will go
on resulting in an alarm.
• TX test fail. The LCM tests each transmitter regularly.
The transmitter sends a known frequency equalling a
certain ullage. The LCM calculates the ullage from the
test frequency and compares with the expected ullage.
If this box is checked there is also an alarm.
Note: If the TX failure is checked but the TX comfail is not,
try exchanging the Electronic Box.
• Clean Antenna. If the strength of the tank signal is
slowly weakened over a long period of time, the Clean
Antenna box is checked. The effect of both trim and list
on the strength of the tank signal are taken into account.
Note: The Clean Antenna warning may come up if the cargo
has extremely low reflectivity, such as certain chemical products.
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A few of the database registers are shown in the window.
These registers can be changed and saved.
The tank distances displayed in the database box are explained in the Installation Manual, found in the "As-built
drawings and user's manual"-binder. The beam distances can
be used when there are disturbing objects in the tank. If
required, these distances are set by a service engineer when
the TankRadar system is commissioned. These beam distances should normally not be changed once the system has
been commissioned.
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Service Manual
• The A- and B-distances are explained in the Installation
Manual.
• The Beam 1-4 distances are used to filter out any dis-
turbing echoes in the tank, where Beam 1 is the lowest
in the tank. These values are programmed by a Saab
service engineer during the commissioning of the system. They should not be changed.
• Trim dist plug, List dist plug, Trim dist cog and List
dist cog are used to define how the correction of the
measured ullage should be corrected for trim and list
angles. Check if correction is done to a separate ullage
plug or to the center of gravity of the tank, in the window “SETUP: Drafts, Trim and List”. The trim distance
is positive when the TankRadar reference point is fore
of the separate ullage plug or the center of gravity. The
list distance is positive when the TankRadar reference
point is to starboard of the separate ullage plug or the
center of gravity.
• Trim dist plug is the longitudinal distance from the
TankRadar reference point to a separate ullage plug. It
is also called the C-distance, see the Installation Manual
for more information.
• List dist plug is the transversal distance from the
TankRadar reference point to a separate ullage plug. It
is also called the E-distance, see the Installation Manual
for more information.
• Trim dist cog is the longitudinal distance from the
TankRadar reference point to the center of gravity of the
products surface at 98% filling (volume) of the tank
(COF). It is also called the C-distance, see the Installation Manual for more information.
• List dist cog is the transversal distance from the
TankRadar reference point to the center of gravity of the
products surface at 98% filling (volume) of the tank
(COF). It is also called the E-distance, see the Installation Manual for more information.
• TX type describes which type of antenna that is used on
the tank.
- 0 indicates a special antenna,
- 1 indicates that the Parabolic Antenna is used,
- 2 indicates that the Cone Antenna is used,
- XX indicates that the Fast Opening Parabolic Antenna
is used.
- XX indicates that the Draught Antenna is used.
• Spec inner length is a theoretical distance correction for
the distance from the microwave unit to the TankRadar
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Service Manual
reference point. There is no need to enter a value here if
TX type is selected as 1 or 2.
• The Local Display Mode indicates which data the Local
Display should show.
- 0 switches the display off,
- 1 makes it show ullage continuously.
- 2 makes it toggle between ullage, average temperature
and inert gas pressure.
- 3 sets the display to show a value sent from the Work
Station. This feature is programmed prior to delivery of
the system. If no value has been defined, the feature is
not working.
- 4 sets the display to show ullage always in mm
- 5 sets the Local Display to show the tank address all
the time.
• FFT search. This indicates the method used to find the
echo when it has been lost. The FFT Search method is
set by the Saab service engineer when commissioning
the system. It should only be changed by a Saab service
engineer.
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Service Manual
3.10 Level Unit – Temperature Data
The Temperature Data-window shows the dynamic data and
the database values for the temperature measurement.
Select a new tank by hitting the Tank-button or by hitting the
up or down arrow keys.
The dynamic data box shows:
• Int temp. The internal temperature measured by a
sensor inside the Transmitter is displayed.
• Temp avg. The average temperature calculated as the
average of the values from the sensors that are immersed in the liquid.
• Temp 1, 2 or 3. The value from each individual sensor is
displayed.
The following status are shown:
Note: Temperature sensor number 1 is the lowest sensor. If only
two sensors are used, these will be number 1 and 2, with number 1
as the lowest.
• TX comfail indicates that the transmitter is not commu-
nicating. This produces an alarm on the alarm row.
• Int temp fail. The internal temperature measurement
has failed when the box is checked.
• Avg error. This box is checked if it was not possible to
calculate any average temperature. For example if there
is no temperature sensor in the liquid.
• Temp 1, 2 or 3 fail. This temperature sensor does not
produce an acceptable value.
• Int Temp valid. This box is checked when the internal
temperature sensor is producing an acceptable value.
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Service Manual
• Temp 1, 2 or 3 in liq. This box is checked when this
temperature sensor is immersed in the liquid, when it
has stabilized and when the ullage value is valid.
The following database data are shown and can be changed:
• L3, L2 or L1 type/range. This value shows if it is a
three-wire or four-wire type sensor that is used. The
temperature range is also defined by this value. The
following values can be shown:
• 0 for no connected temperature sensor.
• 1 for four-wire sensor with temperature range 0 to
+100°C.
• 2 for four-wire sensor with temperature range -50 to
+250°C.
• 5 for three-wire sensor with temperature range 0 to
+100°C.
• 6 for three-wire sensor with temperature range -50 to
+250°C.
• H distance. The H distance is explained in the Installa-
tion Manual.
Any changes of the database values must be followed by
hitting the Save-button as well as restarting the transmitter
by hitting the Restart TX-button.
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Service Manual
3.11 Level Unit – IG Pressure Data
The IG Pressure Data-window shows the dynamic data and
the database values for the IG pressure measurement.
Select a new tank by hitting the Tank-button or by hitting the
up or down arrow keys.
The dynamic data box shows:
• Pressure. The measured pressure.
The status boxes show:
• TX comfail indicates that the transmitter is not communicating. This produces an alarm on the alarm row.
• Press sens fail. The sensor is faulty. This status will also
be shown as an alarm.
• Press sens valid. This box is checked when the measurement is working well.
• Ext. press alarm. The extreme pressure alarm status is
an alarm for rapid detection of changes in the IG pressure. The alarm handling is done in the Transmitter,
and the alarm can therefore be displayed to the operator instantly.
The database box shows:
• Press sens type. The type of sensor can be set as:
- 0 for not connected sensor.
- 9 for ± 500 mbar type sensor.
• Pressure offset. The offset correction that has been
programmed for the sensor. The pressure offset is programmed by pressing the Service-button in the Level
Unit-window, see chapter 3.28 and 6.4.
• Ext alarm low and Ext alarm high. Set the high and low
alarm limits of the extreme pressure alarm.
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Any changes of the database values must be followed by
hitting the Save-button as well as restarting the transmitter
by hitting the Restart TX-button.
Third edition, June 1997
3.12 Level Unit – Extra Sensor Data
The Extra Sensor Data-window shows the dynamic data and
the database values for the two extra temperature sensors
that can be connected to each transmitter.
Select a new tank by hitting the Tank-button or by hitting the
up or down arrow keys.
Service Manual
The dynamic data box shows:
• Sensor 4 and 5. The temperature measured by the
sensors are displayed in 1/10 of degrees.
The following status are shown:
• TX comfail indicates that the transmitter is not commu-
nicating. This produces an alarm on the alarm row.
• Sensor 4 or 5 fail. The temperature sensor has failed
when its box is checked. This status will also be shown
as an alarm.
The following database data are shown and can be changed:
• Sensor 4 and 5 type. This value shows if it is a three-
wire or four-wire type sensor that is used. The temperature range is also defined by this value. The following
values can be shown:
• 0. No connected temperature sensor.
• 1. Four-wire sensor. Temperature range 0 to +100°C.
• 2. Four-wire sensor. Temperature range -50 to +250°C.
• 5. Three-wire sensor. Temperature range 0 to +100°C.
• 6. Three-wire sensor. Temperature range -50 to
+250°C.
• Sensor 4 or 5 offset. An offset can be set for each sensor
individually.
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Any changes of the database values must be followed by
hitting the Save-button as well as restarting the transmitter
by hitting the Restart TX-button.
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Service Manual
3.13 Level Unit – Trim/List Data
The Trim/List Data-window shows the measured trim and
list angles. They are displayed as 1/100 of degrees.
The source of the trim and list values are shown in the Ship
measures-window in the Configure-part of the software.
Open the Ship measures-window by hitting the Window-key
and selecting Configure. Then hit the Picture-button and
select Calculation and Ship data.
The dynamic data box is divided into three parts for LCI,
LCM 1 and LCM 2. The LCM 1 and 2 read trim and list values produced by the Trim/List Unit mounted in the Level
Unit cabinet. The LCI receives its trim and list values from
draft sensors, separate inclinometer, from external communication or if it is manually entered.
The status boxes show.
• Trim or list sens fail. The sensor in question is faulty.
• Trim or list manual. This box is checked if manual
values for trim and list have been entered.
In the database box the following is shown and can be
changed:
• LT sensor type. Enter 0 if no trim and list sensor is
connected. Enter a 1 if the standard Trim/List Unit is
used.
• Trim or list offset. If you find that the trim/list values
displayed by TankRadar are not correct, their offset can
be programmed in the database box. The offset is
shown in 1/100 degrees angle. For example, enter 5 to
set a 0.05° offset.
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• LU Orient. This shows in which direction the Level
Unit cabinet has been placed on board.
0 - front of LU faces to port.
1 - front of LU faces starboard.
2 - front of LU faces fore
3 - front of LU faces aft.
Any changes of the database values must be followed by
hitting the Save-button.
3.14 Level Unit – LCM 1 and 2 Status
Service Manual
Use these windows to check the status of the Processor
Memory Board, LCM. As there can be one or two LCM, there
are two windows: LCM 1 Status and LCM 2 Status. To check
if there is one or two LCM in the system, see the window
LCI, LCM Version, see chapter 3.22.
If there are two LCM in the system, check LCM mode to find
out which one is active. The active LCM is also shown in the
LCI Status-window described below. See chapter 5.4 for more
information on when to use one or two LCM and LCS.
The dynamic data box shows:
• LCM Mode. Mode 0 is shown when the board is running the boot software. 1 is shown when it is resting,
waiting for the LCI to order it to start measuring. 2
shows that it is running on its flash program.
Note: If the mode is shown as 0 for a longer period of
time, the flash program is probably corrupt in some
way. Load new LCM software from the Load Programwindow, see chapter 3.23.
Note: If there is only one LCM and it shows mode 1, there is
probably something wrong with the LCI or the communication between LCI and LCM.
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Service Manual
• Test running. The LCM asks the LCS for a test signal
which is processed and compared with an expected test
result. It should show 14949±10 when it is OK. If it is
not OK, there will be a LCS failure alarm.
• Sweep counter. The sweep counter indicates that the
LCM is working. It count ordered sweeps. Check that
the sweep counter is counting to see that the board is
operating. Check also the Sweep error LCM-status box
in the LCI Status-window described below.
• Schedule status. Shows the setting in the Transmitter
Service window. 0 is the normal mode. A 1 means that
every second sweep is done on one of the tanks and the
other sweeps are done on the other tanks. 2 means that
this is the only transmitter that is measuring. The tank
is selected and the schedule mode is set in the Transmitter Service-window. However, in the Transmitter Data it
is possible to select mode 0 or 2 for a selected tank.
• Service status and Service code. Both of these values
can be used by the Saab service engineers. They are of
no use to the crew on board the ship.
• LCS status. Shows the status of the LCS. 0 means that
the LCS is OK, while a 1 indicates that the LCS test
failed.
The LCM system and memory status boxes show:
• Def DB loaded. The checksum of the database is calculated at startup. If there is some error, the default database is loaded and this box is checked. When this box is
checked, a warning appears on the Work Station. See
also chapter 9.1.7.
If this box is checked, download database from Work
Station to LCM. The Level Unit restarts automatically
when the downloading is finished.
Restart the Level Unit (see chapter 5.3), to see that
default database has been loaded. If the Def DB loadedbox is still checked after restart, the memory on the
LCM board is faulty and the board needs to be replaced. See also chapter 9.1.7.
• LCM RAM error, LCM Flash error, LCM EEPROM
error and LCM EXTRAM error. Each time the LCM
restarts, the memories are checked. None of these boxes
should be checked. If any of these boxes are checked,
exchange the LCM.
The database window shows:
32
• Prio scheme. A 0 means that each tank is measured one
after the other. However with a 1, the tanks that have
Third edition, June 1997
moving surfaces are measured more often. This function can be useful if there are many tanks, and some of
them have large level rates when loading or discharging.
3.15 Level Unit – LCI Status
Service Manual
This window shows the status of the LCI. If you suspect that
there is some problem with an LCM, this window provides
some good information.
The following information is shown in this window:
• Wdog reset cnt. This is a counter that counts the num-
ber of times the watchdog has triggered since the last
time the Level Unit was powered on. The watchdog is a
part of the hardware that triggers a reset if the software
gets “stuck”. If it does, the watch dog causes the software to restart. This indication should normally be very
low. If there are frequent restarts of the system and this
counter shows large values, there may be a problem
with the LCI. Try exchanging it.
• Service status and Service code. Both of these values
can be used by the Saab service engineers. They are of
no use to the crew on board the ship.
The LCM status box shows the status of the communication
between the LCM and LCI:
• MTA error LCM 1 or 2. Indication of service message
failure between LCI and LCM. If there is an error so
that this box becomes checked, the Level Unit will try to
restart itself. A message will be displayed “Level Unit
restarted”.
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Service Manual
• Sweep err LCM 1 or 2. This is an indication that the
LCM is not measuring normally. The sweep counter on
the LCM is supervised. If there is no change in 10 seconds this box becomes checked. See also chapter 3.14. A
message will be displayed “Level Unit restarted”.
The Active LCM box shows which LCM that is being used.
In case there are two LCMs configured in the redundancy
mode, this box indicates which of the LCMs that is in use.
The LCI status box shows the status of the LCI:
• Sys fail. The Sys fail causes a Level Unit sys fail alarm.
It can be caused by:
- LI power failure,
- LI communication failure,
- No active LCM,
- Error status set in LCM Status-window, see chapter
3.14.
The LCI mem status shows the result of memory checks on
the LCI. Both boot and flash memories are continuously
supervised.
• LCI RAM error. Indicates memory failure of the RAM.
• LCI boot error. Indicates memory failure for the boot
program.
• LCI flash error. Indicates memory failure for the flash
program.
• LCI DB error. Indicates an error in the database.
• Default DB loaded. If the checksum of the database is
incorrect at startup, this box is checked. The box will be
checked until the next time the LCI (or Level Unit) is
restarted or the database is changed.
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3.16 Level Unit – LI Status
Service Manual
This window shows the individual status of up to four Transmitter Interfaces (LI).
This window is useful when you are looking for a ground
failure. It is easy to detect which Transmitter Interface (LI)
that has ground failure. See also chapter 9.1.6 and 9.14.
The status boxes show:
• LI +15V fail and LI -15V fail show if there is any prob-
lem with the power supply to the LIs. If any of these are
checked, check the Power Block. See chapter 9.1.3.
• LI ground fail. This check box indicates which LI that is
causing a ground failure alarm.
• LI comfail. If there is any problem with the communi-
cation to the LI, this is shown in the LI comfail check
boxes.
The database shows:
• LI handler. The Database box shows which LI that is
connected to which LCM. 0 indicates that the LI is not
used. 1 indicates the it is connected to LCM 1 and 2
indicates that it is connected to LCM 2.
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Service Manual
3.17 Level Unit – Backup and Local Display
This window is used only when special units and special
scalings have been programmed into the system at factory
before delivery.
A better way to change presentation units and change presentation of trim/list correction is in the Setup-window,
opened from the Work Station’s base window. See Operating
Manual for more information.
However, it is possible to change units and trim/list correction, for the Backup Display and the Local Displays, from the
Backup and Local Display-window. You must make the same
changes in both windows. At restart of the system, both these
databases will be set to the same values anyway.
Set units according to the following:
Ullage:
0 = meter and meter/hour
1 = feet and feet/hour
Temperature:
0=°C (degrees Celsius)
1=°F (degrees Fahrenheit)
Pressure:
0 = mbar (millibar)
1 = PSI (pound per square inch)
Trim/list correction:
0 = Uncorrected ullage is displayed
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Third edition, June 1997
Service Manual
1 = Correction to the tank’s reference point (Plug)
2 = Correction to the tank’s center of gravity (COG)
It is also possible to use two sets (1 or 2) of customized units
for each parameter. These can be scaled from the raw data
into the new units using the scale constants A, B and C. The
scaling is done according to the formula:
data (in custom units) = (raw data * A) / B + C.
You can also set the number of decimals to be presented on
the displays.
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37
Service Manual
3.18 Level Unit – LCI Com Ports
Communication port 1 is usually used for the communication with the Work Station and port 2 is used for a Service
PC.
If there is any problem with the communication between the
Level Unit and the Work Station, check that the values are:
Protocol = 0
Baud = 19200 bps
Databits = 8 bits
Stopbits = 1 bit
Parity = 110 (where 110=none, 111=odd and
101=even).
Check also the Serial Communication-window in the configuration part of the Work Station software for communication settings for the Work Station’s serial port to the Level
Unit.
Note: The information in this window should normally not be
changed. Once the system has been commissioned, the communication parameters have been checked and the communication has been
established, there is no need to change this parameters.
38
Note: If there is no contact between the LCI and the Work Station,
check the setting of the LCI com ports on the Backup Display on the
Level Unit. See the Operating Manual for information about the
Backup Display.
Third edition, June 1997
3.19 Level Unit – Relays
Service Manual
In the status box in this window the status of the relays in the
Power Block of the Level Unit are shown. These will show
the same status as the Sysfail and Power fail in the LCI status
window described in chapter 3.15. The External pressure
alarm relay will be activated when the this alarm is active.
See chapter 3.11 for more information.
Note: The Sysfail and Power fail relays are normally on. This
means that when the system is working, the relays are activated
and consequently off. During a black out, for example, these relays
go on.
In the TankRadar systems that have a Work Station, the
relays in the I/O Box are used instead of the ones in the
Level Unit. See also chapter 5.11 and 4.1.4.
In the database box it is possible to manually set the two
auxiliary relays in the Power Block. Enter a “1” and hit the
Save-button to activate the relay.
If the relays in the Level Unit are used for System Failure,
Power Failure and Extreme Pressure Alarm indication, these
warnings can be reset by hitting the buttons at the bottom of
the window. Use the Abort-button if there would be any
problem when hitting the Reset-buttons.
Third edition, June 1997
Note: It is only the relays that are reset, the alarms may still be
active. This is useful for example when you need to quiet a siren
that is connected to one of the relays.
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Service Manual
3.20 Level Unit – Work Station Communication
This window shows the load on the communication between
the Work Station and the Level Unit. It also shows if the
communication is working by counting the number of transactions and responses. You can reset these counters by hitting
the Reset counters-button.
Note: If there is no communication at all the pointer instrument
will show 100 % load. The pointer instrument measures the free
capacity on the communication. Consequently, if there is no communication, there will be no free capacity.
40
Third edition, June 1997
3.21 Level Unit – Any Register
Service Manual
In this window you can view any of the registers in the
LCMs or the LCI. There are two types of registers, the dynamic registers and the database registers. There are four
buttons to select LCI or LCM and to select dynamic or database registers. Hit one of these buttons.
The normally used registers are shown in the windows described in this chapter 3. It is only for extraordinary service
actions that you would need to go directly to the register and
change data.
You can select if you want to see the registers in hexadecimal
or in decimal form. Normally decimal form is best.
Enter at which register you want the displayed list to start at
and how many registers you want to see (max 15 at a time).
Then hit the Read-button to display the registers you have
specified.
Third edition, June 1997
41
Service Manual
Database registers can be changed. Type in a new value and
hit the Save-button.
Note: You must be sure that you are changing the correct register,
as many of the registers lack a descriptor.
A list of a few of the database registers of the LCI is included
below:
Reg no. Name Description
00 Port_1_protocol To Work Station
01 Port_1_baudrate To Work Station
02 Port_1_databits To Work Station
03 Port_1_stop bits To Work Station
04 Port_1_parity To Work Station
05 Port_2_protocol To Service PC
06 Port_2_baudrate To Service PC
07 Port_2_databits To Service PC
08 Port_2_stop bits To Service PC
09 Port_2_parity To Service PC
10 LU_setup 0=fast update, 1= redundance
11 Relay_4_control 0=off, 1=on
12 Relay_5_control 0=off, 1=on
20 LCB_TrimList_corr 0=off, 1=on
21 LCB_ullage_unit 0=m, 1=feet
22 LCB_temp_unit 0=°C, 1=°F
23 LCB_press_unit 0=mbar, 1=PSI
50 LI_1_handler 0=none, 1=LCM1, 2=LCM2
51 LI_2_handler 0=none, 1=LCM1, 2=LCM2
52 LI_3_handler 0=none, 1=LCM1, 2=LCM2
53 LI_4_handler 0=none, 1=LCM1, 2=LCM2
100 Number of tanks
101 Display shutdown timeout in seconds
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Third edition, June 1997
3.22 Level Unit – LCI, LCM Version
Service Manual
In this window you can see the version of the programs in
the LCI and LCMs. You can also see if one or two LCMs are
used.
This information can be useful if you need to contact Saab
Marine Electronics or a service agent.
Third edition, June 1997
43
Service Manual
3.23 Level Unit – Load Program
Hit the Service-button to open this window. This window
can be used to load new programs into the LCMs and LCI.
The new program can be downloaded from a diskette.
Note: Make sure the new program is compatible with the Work
Station software. If unsure, please contact Saab Marine Electronics
for advice.
Insert the diskette with the program into the diskette drive of
the Work Station. Hit one of the three buttons to indicate if
you want to download a program to LCM 1, LCM 2 or LCI.
Hit the Filename-button to find the file containing the program. Hit the Down load-button once you are satisfied with
the settings. The progress of the downloading is shown in a
bargraph at the bottom of the window. There is an Abort-key.
However, once the file has started to download, the original
program is lost. Therefore if you abort, you must still down
load a new software.
44
Third edition, June 1997
3.24 Level Unit – Up/Download Database
Hit the Service-button to open this window. Use this window
to copy database from one memory to another. It is possible
to download database from the Work Station to the LCMs
and the LCI. It is also possible to upload database from these
boards to the Work Station.
Service Manual
This window is useful when you have replaced either an
LCM, LCI or a hard disk in the Work Station.
Note: As the TankRadar system is commissioned, a number of
parameters may be changed in the system. These changes are stored
in the database. The database will therefore differ from the default
database that was installed at delivery of the system.
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45
Service Manual
3.25 Level Unit – TX Service
The test functions for TX simulation and LCS simulation can
be used if a tank has the TX Failure check box marked.
When setting the signal source to TX Simulation, a tank
signal will be sent from the Transmitter to the Level Unit.
The LCS Simulation generates a signal from within the Level
Unit.
The simulation signal represents a “Distance” about half the
B-distance if TX Type and Specific Inner Length are set to
zero and the Pipe and Vapor Correction are not used. Note
that the simulated “Distance” is not precisely defined.
If both TX- and LCS Simulations give a “distance”, but the
TX Failure check box is still marked, the reason for fault can
be:
• hardware fault in the Transmitter’s Electronic Box,
• dirty, damaged or misaligned antenna,
• the Electronic Box is not correctly mounted on the
antenna feeder or
• there are no echoes to find within the defined range.
46
If only LCS-Simulation produces a “distance”, the reason for
fault may be:
• a hardware fault in the Transmitter’s Electronic Box or
in a Transmitter Interface (LI) or
• faulty cabling between Transmitter - Transmitter Interface - LCS Board.
Third edition, June 1997
If not even LCS Simulation gives a “distance”, the reason for
fault is likely to be located on the LCS Board.
3.26 Level Unit – Scan Tank
The scan tank function is used when there is a need to view
the radar echoes inside the tank. This function is used during
the commissioning of the system. A Saab service engineer
will use this window to measure and save a curve of the
signal strength throughout the tank.
The function of the Scan Tank-window is not described in
this manual since it is not used during normal service of the
system. The results need to be evaluated by an experienced
Saab service engineer.
3.27 Level Unit – Restart LCI, LCM
Use this window to restart the LCI or the LCMs. Restarting
the LCI also causes both the LCM and the transmitters to
restart. Restarting the LCM also causes the transmitters to
restart.
Service Manual
Third edition, June 1997
47
Service Manual
3.28 Level Unit – IG Press Zero Adjust
Select this window when the IG pressure sensors need to be
adjusted. Select the tank that needs to be adjusted.
Note: When the IG pressure sensor is adjusted for zero pressure it
is very important that the pressure inside the tank is equal to the
pressure outside the tank. The tank must be opened. See also chapter 6.4. Permission from officer in charge must be obtained before
the tank is opened.
Follow the instructions below when calibrating the IG pressure sensor for zero difference in tank pressure and atmospheric pressure.
1. Make sure that the tank or tanks that you intend to
calibrate are open and that there is not a strong wind
affecting the measurement.
2. Check that none of the check boxes for TX Comfail,
Press Sens Fail or Ext Press Alarm are marked for any of
the tanks you intend to adjust.
3. Open the IG Press Zero Adjust-window on the Work
Station.
4. Select the tank you intend to calibrate.
5. Hit the button “Zero adjust this sensor”.
6. Watch new value in the white database box.
7. Hit the Save-button.
8. Continue with another tank from step 1 above or exit
the window.
48
Note: If you intend to hit the Zero adjust all tanks-button, make
sure that ALL tanks have atmospheric pressure inside. Otherwise
you might ruin a previously correct calibration on some tanks.
Third edition, June 1997
3.29 Disconnect LU
Use this function when there is a need to change the LUdatabase in the Work Station when there is no communication with the Level Unit.
When you select Disconnect LU on the Service Menu, the
question “Continue without communication with Level
Unit? OK or Cancel” will be displayed.
3.30 The Communication-Window
Service Manual
Select Communication from the Service-menu to open the
Communication-window. This window shows the communication on the serial ports to the I/O Box.
Select which serial port to view by hitting the Serial port
activity-button. A list is displayed with the available ports.
Communication data such as baud rate, parity bits, data bits
and stop bit is shown in the white box in the window.
There are also two indicators showing send and receive
activity. These are similar to the LEDs on the Interface boards
in the I/O Box, see chapter 4. However, in the half-duplex
setting, the Send-LED on the Interface boards echoes all the
received information. It can therefore be quite difficult to see
if the board is really sending anything other than the questions it is receiving. In this window, the Send-indicator does
not echo the received signals. Therefore, when the Sendindicator blinks, the interface board is really transmitting
data.
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Service Manual
The RS-485 Interface Board can be set to half or full duplex,
using jumpers. In this window it is easy to check the setting
of the jumpers. See chapters 9.4 and 4.3.
Hit the Communication Log-button and select the communication you want to view. The Communication Log-window
shows the communication parameters as well as the messages that are communicated.
You can disregard the information in the Mode-box. The
information about the Auto RTS is only used by the Saab
Marine service engineers or the service agents.
3.31 The I/O-Window
50
The I/O-window shows the raw values of the signals in and
out of the terminals of, for example, the I/O Box and SIOX
modules. Hit the Terminals-button to select which terminal
you want to look at.
Hit the Terminals-button to show a list of the available terminals. Select one of the shown terminals.
The Scale-button shows the scalings available for showing
the raw values as current or voltage.
Third edition, June 1997
The value for digital inputs or outputs is shown as either 0 or
1. For digital outputs, it is possible to change the value and
hit the Save-button to see that the output is working. Sometimes detection of the output is easier if the Blink selection is
set to 1. The output (for example relay) will change back and
forth between active and inactive.
The value for analog inputs or outputs is shown in unscaled
units. The maximum and minimum values for the terminal
are shown and cannot be changed. These values could, for
example, be the unscaled raw values from a SIOX-system.
The check boxes show if the terminal has been set to be inactive or if it has been given a high priority.
3.32 Install/Backup-Window
Service Manual
Use this window to make a backup copy of pictures and
database or to install new software. We recommend that you
make two backup copies of database and pictures every six
months. Store one copy in a safe place together with program
diskettes. Send one copy to Saab Marine Electronics for
storage on network servers. In this way the database and
pictures of your system will always be up to date. When
communicating with Saab Marine, this updated information
will be of great help when fault finding, changing pictures or
in any other way updating the system.
3.32.1 Backup Copies of the Database and Pictures
Follow the instructions below when making backup copies of
the database and pictures:
Note: When there is a network of Work Stations, backup must be
made from the Master Work Station.
1. Slide an empty DOS-formatted diskette into the diskette drive.
2. Open the Install/Backup-window.
3. Hit the Backup-button. A menu is opened.
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Service Manual
4. Select Backup All. A message is displayed on the screen
and the files are copied onto the diskette. Follow any
instructions on the screen.
3.32.2 Install Database and Pictures
Follow the instructions below if you need to install new or
backup copies of pictures and/or database on the Work
Station.
If you are uncertain of which files are stored on the diskette,
hit the View-button to view the files on the diskette.
Note: When there is a network of Work Stations, install must be
made on each Work Station in the network.
1. Slide the diskette with database and pictures into the
diskette drive.
2. Open the Install/Backup-window.
3. Hit the Install-button.
4. Select Install All from the menu.
5. A message is displayed. The files are copied from the
diskette onto the hard disk of the Work Station. Follow
any instructions on the screen.
6. Restart the Work Station.
7. Open the Up/Download Database-window described
in chapter 3.24 and download the database to the LCM
or LCMs.
3.32.3 Installing New Program to the Work Station
You may receive a diskette with a new version of the program for the Work Station. In such a case follow the steps
below to install the new program:
1. Slide the diskette with the new program into the diskette drive.
2. Open the Install/Backup-window.
3. Hit the Install-button.
4. Select Install All from the menu.
5. A message is displayed. The program is copied from the
diskette onto the hard disk of the Work Station.
6. Restart the Work Station.
3.32.4 Saving a Log-file to a Diskette
In the Group-window it is possible to log values to a file.
These files are possible to copy to a diskette. This could be
useful when fault finding the system. Follow the instruction
below to copy a log file to a diskette:
1. Insert a DOS formatted diskette into drive A.
2. Hit the Backup-button.
52
Third edition, June 1997
3. Select “Backup one file”.
4. Select the log file you want to save. Its name has an
extension “.log”. These are normally placed in the
directory acu/tmp.
5. Order the copying to start.
3.33 Service Log-Window
Select Service Log from the Service-menu to open the Service Log-window. It
is used when there is a need to store measured data for a later analysis. The
log software regularly stores time, channel status and channel value into a
log file. The log file is named “dl<mm><dd><hh>.log” where <mm> is the
month (01-12), <dd> is the the day (01-31) and <hh> is the hour (00-23). If the
log is restarted within the same hour the previous log was started, previous
log data is lost. The log file can be copied onto a DOS-diskette, see Backup
below.
Service Manual
The Service Log-window is used to setup the logging of the measured values.
Sample time The time between the logged samples. It can be set to
Max samples in The maximum number of entries in
one file the log file before a new log file is created (typically 20
#channels Number of channels to be logged, between 0 and 20.
Ta g Channel tag with seven characters. For example
Sign A √-sign indicates that the channel can have positive
Third edition, June 1997
between 10 and 99999 seconds.
000).
“CT01ULL” for ullage of first tank or “CT01RAT” for
level rate of first tank.
and negative values, such as level rate.
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Service Manual
AMP Active A √-sign indicates that the the AMP channel for echo
Log running Indicates that the log is running.
Log stopped Indicates that the log is not running.
Start/Stop Use this button to start or stop the log.
Save Setup and Use this button to save the changes
Restart Log and restart the log.
Backup The Backup-function saves a compressed archive file
amplitude exists. Check the box to create AMP channels
if they are not active, then restart the Work Station.
(more than 10 times compressed) file with filename
(acu.pax) that contains the log files (dl*.log), the software supervisor logfiles (syscon*.log, wdog*.log), and a
listing of all the files in the log directory (dlinfo.log).
The Backup-function copies the compressed archive to a
DOS-diskette. It makes sure that the archive fits onto a
diskette. All logs that are a maximum 12 weeks old are
copied. However, if they do not fit onto a diskette, only
the most recent logs will be copied. For decompression
and analysis of a service log, contact the Service Department at Saab Marine Electronics.
3.34 Process Debugger, Interface Editor, PictCopy, Shell
These selections are normally not used on board. They can be
used by Saab Marine service engineers or service agents
visiting your ship.
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Third edition, June 1997
4 I/O Box
Figure 4-1 shows the I/O
Box.
Service Manual
The I/O box is used to interface various equipment to the
Work Station including the Level Unit. The I/O Box is made
up of a motherboard with power supply, relays and connectors for seven Interface Boards.
The I/O Box is connected either to an 8-channel serial interface board in the Work Station or to the Com 1 and Com 2
ports. One of these channels is used for watch dog and relay
output control. The other seven channels are wired to seven
connectors on the motherboard. Of these seven channels, one
is used for connection of the Level Unit.
The Interface Boards are used for connecting equipment such
as host computer, load calculator, ballast level gauging system and Tank Display Units.
Via a SIOX Interface Board, a wide range of analog and digital inputs and outputs can be connected via field bus distributed I/O modules.
WS
8 x RS 232 (or 2 * RS232)
I/O Box
SIOX field bus
Load calculator
Ship host computer
Ballast level gauging system
Portable Readout System
Relays
Level Unit (Standard)
Tank Display Units
SysFail (Std.)
Common Alarm (Std.)
Aux 1
Aux 2
Aux 3
Aux 4
Aux 5
Aux 6
Optional
peripheral
units
Configurable
options
Third edition, June 1997
Figure 4-2 shows the I/O Box with various optional equipment
connected to it (board locations can differ).
55
Service Manual
4.1 The Motherboard of the I/O Box
The motherboard in the I/O Box contains a power supply, a
communication watch dog with System Failure output,
seven relay outputs and seven slots for plug in of various
Interface Boards. The seven serial channels are directly wired
to the seven connectors for the Interface Boards.
4.1.1 Watch Dog LED
There is a red LED (H4) on the motherboard indicating that
there has been an interruption of the communication with
the Work Station. The LED remains lit after the watch dog
has been triggered. This LED will normally be lit since this
watch dog will trigger while the Work Station is starting up
X30 X31 X8 X37
X1
H3
H2
RST
H4
H10
X10 X11 X12 X13 X14 X15 X16 X17
H11X2H12X3H13X4H14X5H15X6H16X7H17
Figure 4-3 shows the motherboard of the I/O Box.
after a black-out or after the Work Station has been switched
on. When there is an interruption of the communication to
the Work Station, watch dog is triggered and the watch dog
LED lights up and remains lit.
Check function of I/O Box by following the steps below.
1. Open cover of I/O Box.
2. Locate the red watch dog LED and a reset switch right
next to it on the motherboard of the I/O Box.
3. Beside it there is a reset switch.
4. Make sure the Work Station (if more than one Work
Station – the master Work Station) is running.
5. Press the reset switch in the I/O Box.
6. Wait for approximately half a minute. The watch dog
LED should not light up.
Voltage
selector
F3 F4
X9
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Third edition, June 1997
Service Manual
4.1.2 Communication LEDs
A green LED (H2) indicates received data and a yellow LED
(H3) indicates transmitted data. Received data is echoed back
to the source.
4.1.3 Power LED
The voltages on the motherboard are monitored and are
indicated by a green LED (H1).
4.1.4 Relays
There are eight relays for alarms and general output signals
in the I/O Box. One of them is a System Failure relay controlled by the Work Station. The other seven relays can be
used for alarms or for general output signals.
There is a similar set of relays in the Power Block of the Level
Unit. However, the System Failure relay in the I/O Box is
activated by System Failures from both the Level Unit and
the Work Station, while the System Failure relay in the Power
Block is activated only by System Failures within the Level
Unit.
4.1.5 Power Setting
On the motherboard there is a switch for selecting the power
as either 230 VAC or as 115 VAC.
4.2 RS-232 Interface Board
The RS-232 Interface Board is used to connect equipment
with RS-232 communication to the I/O Box. The Interface
Board provides galvanic separation of the signals to the Work
Station. No conversion of the RS-232 signals is made.
The Interface Board has a green LED for indication of received signals and a yellow LED for transmitted signals.
4.3 RS 485 Interface Board
The RS 485 Interface Board is used for connecting equipment
with RS 485 communication to the I/O Box. The Interface
Board converts the signal from RS-232 to RS 485 and back to
RS-232, as well as providing galvanic isolation.
The RS 485 Interface Board can be set in two different modes:
half duplex or full duplex by setting jumpers on the board.
The jumpers also control the 485-bus end termination. The
default setting of a spare board is half duplex and end terminated. The jumper settings are:
Third edition, June 1997
57
Service Manual
Half duplex two-wire transmission - S1-S4:1-2.
Full duplex four wire transmission - S1-S4:2-3.
The connection of the Level Unit and LevelDatic system
requires half duplex, while the Tank Display Units require
full duplex.
Note: When trouble shooting you might need to exchange two RS
485 Interface Boards. Remember to check the setting of the jumpers
for correct transmission. A 485-bus for a LevelDatic system with
more than one module may use an unterminated board depending
upon its location.
The Interface Board has a green LED for indication of received signals and a yellow LED for transmitted signals. All
the received signals are transmitted back on the channel and
it is therefore quite difficult to use these LEDs to see if any
answers are transmitted.
4.4 SIOX Interface Board
The SIOX Interface Board is used to connect the optional
SIOX field bus system to the I/O Box. It converts the signal
between RS-232 and the SIOX field bus. If an external power
supply is used, it also provides galvanic isolation.
The SIOX field bus is a two wire current loop bus which is
either powered from the motherboard or from an external
power supply. Jumpers S1 and S2 must be set according to
the power connection.
The Interface Board has a green LED for data, which is normally lit. A ground failure will blow the fuse (F1) and light
the red LED on the board.
Each SIOX module also has two LEDs. The Live Bus-LED
indicates that there is communication on the bus. The Answer-LED flashes when the module is sending an answer
onto the bus. If the Answer-LED does not flash, the SIOX
module might need to be replaced.
4.5 PRS Interface Board
The PRS Interface Board functions as a modem. It transform
the digital signals to audio signals. Its transmission speed is
1200 Baud. The PRS Interface Board has a green LED for
indication of received signals and a yellow LED for transmitted signals.
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Third edition, June 1997
5 Level Unit
5.1 Description of the Level Unit
The Level Unit contains terminals for the intrinsically safe connection of the Transmitters. It contains the electronics used for processing the signals from the Transmitters, for calculating tank parameters, such as trim/list corrected ullage, and for communicating with the Work Station.
The Level Unit is a cabinet with mainly three different parts.
• At the bottom the Power Block is placed supplying the
cabinet and the equipment on deck with intrinsically
safe power.
• In the middle of the cabinet the Transmitter Interfaces
are placed. This is where the cables from the Transmitters are connected.
• At the top part of the cabinet, the Calculation Unit is
placed. It contains the boards for processing and calculating the measured values. It also contains the Backup
Display with a keyboard. The Backup Display is used
mainly for service purposes.
Service Manual
A Level Unit can connect up to 30 Transmitters. In large
systems with more than 30 tanks, a Slave LU cabinet is used.
With a Slave LU, up to 30 additional tanks can be connected.
The Slave Level Unit does not contain any Calculation Unit
since the signals from it are processed in the main Level Unit.
Calculation Unit
Transmitter Interfaces
Power Block
POWER SUPPLY
POWER SUPPLY
OK i
1 2 3
LCP LCM
NEMKO Nr. Ex 94C346(Exia)IIC
Transmitter Cable Data:
Lmax=500 µH, Cmax=100 µF
GROUND
LP Power Block
9150 064-641
POWER SUPPLY
115 VAC
230 VAC
SYSTEM
ALARM
7 8 9 0
SERV
MENU
4 5 6
CLEAR
ENTER
1 2 3
LCI
LCS
LCM
LCS
A
B
C
PORT 1
CENT 1
STBD 1
STBD 5
CENT 5
PORT 5
FAILURE
STBD 4
CENT 4
PORT 4
STBD 3
CENT 3
PORT 3
2 3 4 5
STBD 2
CENT 2
PORT 2
1
STBD 1
CENT 1
PORT 1
C
B
A
F1-F6= LI Power Fuses.
WARNING: Any substitution
of components may impair
F3
intrinsic safety. See Service
F2
2A
F1
Manual.
1A
2A
(SERVICE POWER)
SERVICE PC
CONNECTOR
1
PORT 2
CENT 2
STBD 2
2 3 4 5
PORT 3
CENT 3
STBD 3
NEMKO Nr. Ex 94C346(Exia)IIC
Transmitter Cable Data:
Lmax=500 µH, Cmax=100 µF
PORT 4
CENT 4
STBD 4
GROUND
FAILURE
PORT 5
CENT 5
STBD 5
POWER SUPPLY
NEMKO Nr Ex 94C346 (EEx ia)IIC
F6
F5
2A
F4
1A
2A
SERVICE
F7-2A
POWER
OPEN HERE
S1
F8-8A
1
0
Figure 5-1. Level Unit.
Third edition, June 1997
59
Service Manual
5.2 Information Flow within the Level Unit
The signals from a Transmitter enter the Level Unit into a
Transmitter Interface (LI) where they pass the zener barriers
and go on to the Signal Board (LCS). The components on the
Signal Board amplify and process the signals. The signals are
converted to digital form by the Signal Board and are sent to
the Processor Memory Board (LCM), where the signals are
digitally processed. The Interface Board (LCI) handles the
communication between the Level Unit and the Work Station, the Backup Display, the I/O Box and a Service PC if one
is connected.
Exit all
Help
Mon Jan 13 11:26:56
Saab TankRadar
1994
Groups
Trin/List
Ballast
Cargo
Owerview
Window
Overview
Exit
Back
7.28
14.013
Sl
CT 1
CT 2
Pt
Sl
Sb
12.26
14.340
Alarm
CT 8
CT 9
4.500
2.860
CT 1 Ullage ( 1.219)
CT 3
CT 4
CT 5
CT 6
CT 7
1.050
8.728
12.451
11.042
10.480
8.099
11.789
2.31
CT 1,2 and 3CT 4 ,5 and 6CT 7, 8, 9, SlPt and SlSb
Trim 9.95 Meter
List 0.0 Degree
7.28
Silent
Accept
Work Station
I/O Box
I/O
LU
Level Unit
OK i
1 2 3
LCP LCM
POWER SUPPLY
POWER SUPPLY
PORT 5
FAILURE
GROUND
PORT 4
NEMKO Nr. Ex 94C346(Exia)IIC
Transmitter Cable Data:
Lmax=500 µH, Cmax=100 µF
PORT 3
2 3 4 5
1
LP Power Block
9150 064-641
POWER SUPPLY
115 VAC
230 VAC
SYSTEM
ALARM
7 8 9 0
SERV
MENU
4 5 6
CLEAR
ENTER
1 2 3
LCI
LCS
LCM
LCS
A
B
C
PORT 1
CENT 1
STBD 1
STBD 5
CENT 5
STBD 4
CENT 4
STBD 3
CENT 3
STBD 2
CENT 2
PORT 2
STBD 1
CENT 1
PORT 1
C
B
A
F2
F1
1A
2A
SERVICE PC
CONNECTOR
1
PORT 2
CENT 2
STBD 2
2 3 4 5
PORT 3
CENT 3
STBD 3
NEMKO Nr. Ex 94C346(Exia)IIC
Transmitter Cable Data:
Lmax=500 µH, Cmax=100 µF
PORT 4
CENT 4
STBD 4
GROUND
FAILURE
PORT 5
CENT 5
STBD 5
POWER SUPPLY
NEMKO Nr Ex 94C346 (EEx ia)IIC
F6
F5
F1-F6= LI Power Fuses.
2A
F4
1A
WARNING: Any substitution
2A
of components may impair
F3
intrinsic safety. See Service
2A
Manual.
SERVICE
F7-2A
POWER
(SERVICE POWER)
OPEN HERE
S1
F8-8A
1
0
Signal Board
Processor Memory
Board
Interface Board
LCS
LCMWSLCI LCB
T/L
LI
LP
Backup Display
Power
Transmitter Interface
Power Block
TX
Transmitter
Figure 5-2 shows the information flow in the Saab TankRadar system.
60
Third edition, June 1997
5.3 Restarting the Level Unit
1. Check with officer in charge that it is OK to restart the
system. A restart means there may be no information
for a few minutes.
2. Open the front door of the Level Unit.
3. Switch the power off by setting the power switch on the
Power Block to position 0.
4. Wait until the red LED on the Calculation Unit’s power
supply goes off.
5. Set the power switch to position 1 and the system will
start up again.
5.4 Description of the Calculation Unit
The Calculation Unit at the top part of the Level Unit has the
following components,
• one or two LCS
• one or two LCM
• one LCI
• one Backup Display with keyboard
• power supply for the Calculation Unit.
Service Manual
These components are mounted in a board cage. Each one is
easy to remove for replacement.
Two sets of LCS and LCM can be used for one of two purposes:
• for redundancy. One of the boards is active, and the
other board is standby to start measuring if the first
board becomes faulty.
• for increased performance of the system. It is possible
to have quicker updates with two sets of the LCM and
LCS serving about half of the transmitters each, distributed on two or more LIs.
OK i
1 2 3
LCP LCM LCS LCM LCS LCI
7890
456
123
ALARM SYSTEM
MENU SERV
ENTER CLEAR
Figure 5-3.
The Calculation Unit.
Third edition, June 1997
Backup Display
Interface Board
Signal Board
Processor Memory Board
Calculation Unit Power Supply
61
Service Manual
5.5 Signal Board, LCS
The Signal Board contains analog filters and an A/D converter for the analog signal from the Transmitters.
2
5.5.1 Replacing a LCS
Note: In order to avoid ESD-damages (electrostatic discharge), do
not touch the components or the pins in the connector at the back of
the board.
1. Switch the power off before starting this operation.
3
2
2. Remove the two screws on the front panel of the board.
3. Push the knob down to loosen the connector at the back
of the board. See figure 5-4.
Figure 5-4. Removing a
board.
4. Enter the new LCS gently into the slots and push it
slightly so that it becomes flush with the other boards.
5. Tighten the two screws. Switch system on again.
5.6 Processor Memory Board, LCM
The Processor Memory Board processes the A/D converted
signals from the Signal Board and calculates ullages, temperatures and IG pressures for all tanks. The Processor
Memory Board contains a processor, flash memory, database
memory, etc. It has inputs for ground failure alarm from the
Transmitter Interface. Each Processor Memory board can
handle up to 60 Transmitters.
5.6.1 Replacing the LCM
Note: In order to avoid ESD-damages (electrostatic discharge), do
not touch the components or the pins in the connector at the back of
the board.
1. Switch the power off before starting this operation.
2. Remove the two screws on the front panel of the board.
3. Push the knob down to loosen the connector at the back
of the board. See figure 5-4.
4. Enter the new LCM gently into the slots and push it
slightly so that it becomes flush with the other boards.
5. Tighten the two screws. Switch system on again.
6. Check that the correct software version is used on the
LCM. If in doubt contact Saab Marine Electronics.
7. Download the database from the Work Station to the
new LCM. See chapter 3.24.
62
Third edition, June 1997
5.7 Interface Board, LCI
The Interface Board works as an interface between the Processor Memory Board and the Work Station. It also supports
the Backup Display with its keyboard. If a service PC is
connected, it communicates via this board.
The Interface Board has five LEDs on the front panel. The
first LED from the top indicates the transmitted communication with the Work Station, normally through the RS 485
Interface Board in the I/O Box (position Com 4). The second
LED indicates the received signals from the Work Station. In
a similar way, the third and fourth LEDs show the communication with a service PC, if one is connected to the spare RS232 port on the Level Unit. The fifth LED shows if the watch
dog has been triggered since the LU was last restarted.
Service Manual
Figure 5-5. LEDs on the
Interface Board.
Send to Work Station
Receive from Work Station
Send to Service PC
Receive from Service PC
Watch Dog
LCI
5.7.1 Troubleshooting the LCI
The LEDs are useful when troubleshooting the system. If the
top LED (LCI transmit) is flashing the LCI is probably OK.
See fault finding chapter 9.1.1.
If the top LED (LCI transmit) is not flashing while the second
LED from top (LCI receive) is flashing or if none of these
LEDs are flashing, the LCI may not be functioning. Follow
the steps below:
1. Check cables and connectors between LU and I/O Box
as well as between I/O Box and Work Station.
2. Check that correct baud rate is used on both Work
Station and LCI. See chapter 3.18 for more information.
3. If no fault is found, replace the LCI board. It is included
in the Complete Spare Parts set. See instructions in
chapter 5.7.2 below.
Third edition, June 1997
63
Service Manual
5.7.2 Replacing the LCI
Note: In order to avoid ESD-damages (electrostatic discharge), do
not touch the components or the pins in the connector at the back of
the board.
1. Switch the power off before starting this operation.
2. Remove the two screws on the front panel of the board.
Remove the four screws of the Backup Display.
3. Push the knob down to loosen the connector at the back
of the board. See figure 5-4.
4. Pull the both the LCI and the Backup Display out
slightly so that you can remove the connectors on the
flat cables from the Backup Display.
5. Enter the new LCI gently into the slot.
6. Connect connectors to the Backup Display.
7. Push LCI slightly so that it becomes flush with the other
boards.
8. Tighten the screws of LCI and Backup Display. Switch
system on again.
9. Download the database from the Work Station to the
new LCI. See chapter 3.24.
64
Third edition, June 1997
5.8 Trim/List Unit, LT
A unit with inclinometers for measuring trim and list is
integrated in the Level Unit cabinet. These trim and list
values are used to support the radar echo detection process
that finds the true ullage. These values can also be used for
ullage correction if there are no better source of trim and list
values available.
The trim an list values are used in the LCM or LCMs to
calculate trim/list corrected ullages. The trim and list values
are normally measured by the Trim/List Unit in the Level
Unit, but they can also be measured and calculated using
draft sensors or from communication with another system.
Both the uncorrected and the corrected ullage values are
available for presentation on the Work Station, Backup Display or Local Displays. By setting the ullage correction in the
Setup-window on the Work Station, the same correction is
presented on all displays. The trim/list correction can also be
set in the T/L Mode-frame by pressing the System-key on the
Backup Display’s keyboard. See Operating Manual.
Service Manual
5.8.1 Replacing the Trim/List Unit
The Trim/List Unit is mounted to the back plane inside the
Level Unit, below the Calculation Unit.
1. Switch system off
2. Disconnect the connector from the Calculation Unit’s
backplane.
3. Remove the Trim/List Unit.
4. Replace with new Trim/List Unit. Tighten nuts and
connect to backplane.
Note: Mechanical adjustment was introduced in October
1995 as a complement to the electronics adjustment. Preset
the Trim/List Unit using the adjustment screws on the
mounting plate.
5. Adjust the Trim/List Unit according to the instructions
below.
Third edition, June 1997
65
Service Manual
5.8.2 Adjusting the Trim/List Unit
1. Measure the trim and list angles of the ship.
A ship´s trim is the difference between the draft forward and
draft aft. The trim-angle is defined as β in the figure.
Figure 5-6. Trim and list
definitions.
DA - D
F
tan β =
L
where:
D
D
A
F
= draft aft,
= draft fore,
L = Length between scales.
Note: Aft trim is positive and forward trim is negative.
The list angle can be established by hand dipping towards
the water surface from port and starboard rails. The list angle
δ is calculated by:
hs - h
p
tan δ =
w
where:
h
p
h
s
= port dipping distance,
= starboard dipping distance,
w = ship´s width at the dipping point.
Note: For Saab TankRadar, the list angle is considered positive for
port list; conversely, it is negative for starboard list.
Positive trim
–
β
+
AFT
A
D
L
Starboard
Port
hp
–
δ
+
Positive list
w
hs
FORE
F
D
66
Third edition, June 1997
Service Manual
2. Switch the Level Unit on and read the trim and list
values on the Backup Display. Press the System-key and
select “1 TrimList” to see the values from source selected in Configure/Calculate/Shipdata. Check trim
and list values on a Work Station as well.
3. The Trim/List Unit can be adjusted in two different
directions. To adjust it sideways, loosen the bottom
locking nut and swing it sideways. To adjust it towards
the back of the Level Unit or away from it, loosen the
locking nut on the bracket and adjust the angle by
turning the adjusting nut and/or the locking nut. The
displayed value must correspond to the ships trim and
list within ±0,2°.
4. When the mechanical adjustment is finished make sure
that the adjustment nut touches the bracket and that the
locking nut is tightened.
5. On the Work Station, do the fine calibration of the offset
of trim and list in the Trim/List Data-window.
Back of the
Level Unit
Trim/List
Unit
Locking nut
Adjustment
nut
Figure 5-7. Trim/List Unit.
Third edition, June 1997
67
Service Manual
5.9 Backup Display, LCB
The Backup Display serves only as a backup for the Work
Station, for displaying the measured values and contents of
the memory registers in the Transmitters, Processor Memory
Board and the Interface Board.
7890
456
123
ALARM SYSTEM
MENU SERV
ENTER CLEAR
Figure 5-8 shows the
Backup Display with its
keyboard.
789
456
123
Figure 5-9 shows the key
sequence of the service
password.
The display can show each tank with its tank name and
relevant tank values. The display can also show other status
in the Level Unit. Except for the extreme pressure alarm,
alarms are not shown on the Backup Display.
Most of the operation of the Backup Display is described in
the Operating Manual. However, the service part of the
display is only described in this Service Manual.
Note: If the Backup Display is blank, press any key on the keyboard
to light it up. There is a time-out function that switches it off after
approximately 20 minutes after last operation.
5.9.1 Replacing the Backup Display
Follow the instructions in steps 1-4 in chapter 5.7.2 to remove
the Backup Display. Connect the new Backup Display and
follow steps 7-9 in chapter 5.7.2.
5.9.2 Description of the Service Frames
Press the Serv-key on the keyboard to open the directory to
the Service frames. You are required to enter a password to
open the Service frames. The password is “13579”. The password protection switches on again automatically after 20
minutes.
68
5.9.3 Unit Frame
Select the Unit frame to change the units of the system. The
measuring units for level, temperature, IG pressure and level
can be changed. The units are changed in the Backup Display, Local Display and in the Work Station.
To change a unit, the value of a parameter must be changed.
You can select any of the following values:
Level: 0 = meter
1 = feet
Level Rate: 0 = meter / hour
1 = feet / hour
Third edition, June 1997
Service Manual
Note: The level and level rate always based on the same unit. If one
of them is changed, the other changes as well.
Temp: 0 = degrees Celsius
1 = degrees Fahrenheit
Press: 0 = mbar
1 = PSI (pounds per square inch)
5.9.4 Local Display Frame
Select Disp to change the display mode of the Local Display.
Each tank can have its own display mode.
Enter a digit from 0 to 3 to change the display mode.
Mode: 0 = Display is off
1 = Ullage
2 = Toggle between ullage, temperature and
IG pressure.
3 = Data directly from the Work Station.
5.9.5 Register Frame
The Register frame is used for viewing and changing data in
the registers in the LCI and LCM database. See chapter 3.21
for a list of the registers.
There are two types of registers, the database and dynamic
registers. The database registers contain static register that
can be changed while the dynamic registers contain dynamic
values that are continuously measured or calculated.
The registers are shown in order starting with register 0.
New registers can be viewed either by pressing the up or
down arrow keys or by entering the register number and
pressing the Enter-key. Four registers are shown at a time on
the display.
The values are shown as either decimal or hexadecimal
values. When the values are hexadecimal, an H is displayed
after the value.
You can also use the Enter-key to move the cursor in the
frame.
Third edition, June 1997
If two LCMs are included in the system, both are updated
when database values are changed.
5.9.6 FiltDist Frame
This frame is used for viewing the Filter Distance of the
Transmitters. The frame shows three filter distances at a time.
69
Service Manual
5.9.7 Amplitude Frame
This frame is used for viewing the amplitude of the tank
signal. The frame shows three amplitude values at a time.
5.10 Transmitter Interface, LI
The Transmitter Interfaces provide intrinsically safe power to
POWER SUPPLY
PORT 5
CENT 5
STBD 5
the Transmitters, temperature sensors, IG pressure measurement and Local Displays on deck.
LI LEVEL INTERFACE
9150064-631
PORT 4
CENT 4
STBD 4
PORT 3
CENT 3
STBD 3
2 3 4 5
PORT 2
CENT 2
STBD 2
1
PORT 1
CENT 1
STBD 1
A
B
C
Figure 5-10 shows a
Transmitter Interface.
5.10.1 Cabling
The cables from the Transmitters are connected to the Transmitter Interfaces in the Level Unit. The Transmitters are
connected with individual jackable terminals.
5.10.2 Configuration of the Transmitter Interfaces
The Transmitter Interface is made up of two types of printed
circuit boards, the Analog/Digital/Power Board (LIA) and
the Zener Barrier Board (LIZ).
In each Transmitter Interface there can be one, two or three
LIZ boards. Each board can connect up to five Transmitters.
Each Transmitter Interface can connect up to 15 Transmitters.
There can be one or two Transmitter Interfaces in the Level
Unit.
For example, a system with 18 tanks would have one Level
Unit with two Transmitter Interfaces. There would be four
LIZ boards in these two Transmitter Interfaces together.
Figure 5-11. The Trans-
mitter Interface boards.
70
Connectors for the
Transmitters
Analog/Digital/Power
Board
Zener Barrier Board
for 1 to 5
Transmitters
Zener Barrier Board
for 6 to 10
Transmitters
Zener Barrier Board
for 11 to 15
Transmitters
Separate circuits with
four zener barriers for
each Transmitter
Third edition, June 1997
Service Manual
One Transmitter Interface is connected to the Calculation
Unit at the top of the Level Unit, while the other Transmitter
Interfaces are connected in serial with a flat cable between
each one.
5.10.3 Power supply to the Transmitter Interface
The intrinsically safe parts of the Transmitter Interfaces
receive power from the Power Block at the bottom of the
Level Unit via separate cables. The non-intrinsically safe
parts receive their power from the Calculation Unit power
supply.
5.10.4 Ground Failure Indication
On the front panel of the Transmitter Interface there is a LED
indicating any ground failure on the intrinsically safe equipment connected to it.
5.10.5 Addressing the Transmitter Interface
There is an address switch on side of the Transmitter Interface. When replacing a Transmitter Interface, it is important
to set the address switch in the same way as on the one that
is replaced.
Switches 1 and 2 are used for setting the address of up to
four Transmitter Interfaces in the system. Switches 3 and 4
are used to select the LCM that handles the Transmitter
Interface.
Switch 1 Switch 2 LI number Transmitters
ON ON LI no. 1
OFF ON LI no. 2
ON OFF LI no. 3
OFF OFF LI no. 4
Switch 3 Switch 4 LCM configuration
OFF ON Only LCM 1
ON OFF Only LCM 2
OFF OFF Both LCM 1 and 2 in
redundancy mode
As default the switch is set to LI no 1 and for only LCM 1
(Switch 1=ON, 2=ON, 3=OFF, 4=ON)
Third edition, June 1997
5.10.6 The Analog/Digital/Power Board (LIA)
The Analog/Digital/Power Board;
- relays the analog signal from the Transmitter to the
Signal Board,
71
Service Manual
- relays the digital signals between the Transmitter and
the Processor Memory Board and
- stabilizes the intrinsically safe power supply and checks
for ground failure.
5.10.7 The Zener Barrier Board (LIZ)
The Zener Barrier Board has five separate circuits for the
intrinsically safe connection of up to five Transmitters. Each
of the five separate circuits on the Zener Barrier Board contain four zener barriers.
The Zener Barrier Boards are connected to the Analog/
Digital/Power Board (LIA) with flat cables. The Transmitters
are connected to the Zener Barrier Board with jackable connectors with eight conductors, from four twisted pair cables.
Note: The fuses on the LIZ must not be changed in the field. If a
LIZ has a broken fuse, the whole board must be changed as a complete unit.
5.10.8 Removing a Transmitter Interface (LI)
1. If they are not marked, mark up all the connectors so
that they can be easily replaced in the same positions.
2. Remove all the transmitter connectors.
3. Remove the power supply connector and the flat cable
connector (or connectors, if more than one LI is used).
4. Loosen the four nuts and remove the LI.
5.10.9 Replacing a LIZ or a LIA
To open the LI, a TORX-screwdriver is required. This screwdriver can be found in the Complete Spare Part set or it is
included together with the spare LIZ or LIA.
1. Remove the LI according to steps 1-4 in chapter 5.10.8
above.
2. Look for an “Open here”-arrow on the front of the LI
and remove that end wall.
3. Slide the boards out a little bit so that you can remove
the connector to the board you need to replace. Slide it
out carefully.
4. Carefully slide the new board into the LI. Mount the
end wall.
5. If it was an LIA that was replaced, set the address
switches to same positions as on the one you replaced.
6. Mount the LI according to the instructions in chapter
5.10.10.
72
Third edition, June 1997
5.11 Power Block
F1 F2 F3 F4 F5 F6
F4
F3
2A
F2
2A
F1
1A
2A
SERVICE PC
CONNECTOR
(SERVICE POWER)
F7-2A
F8-8A
COMBITECH GROUP
Saab Marine Electronics
Saab TankRadar
LP Power block
9150 064-641
RS 232
connection for
Service PC
Figure 5-12 shows the
Power Block.
(EEx ia)IIC
NEMKO Nr Ex
F6
Serial No.
F5
2A
1A
SERVICE POWER
S1
1
0
Power
outlet
Service Manual
5.10.10 Replacing a Transmitter Interface (LI)
1. If it is a completely new LI, set address switch on the
new LI to same positions as on the replaced LI. See also
chapter 5.10.5. Mark up the connectors on the new LI in
the same way as the replaced LI.
2. Mount the new LI and tighten the four nuts.
3. Fit connectors for Transmitters, power and flat cable.
The Power Block powers the Level Unit and the intrinsically
safe equipment on deck.
The Power Block contains filters for the supply voltage, to
ensure that the strictest EMC requirements are met.
The Power Block can be set for supply voltages of either 115
or 230 VAC. The switch is located inside the Transmitter
Interface. The setting of the switch is marked on the outside
of the Power Block.
There are five relays in the Power Block. Three of these relays
are used for cargo tank IG extreme pressure alarm, power
loss and System Failure. Two relays can be controlled from
the Work Station. If a Work Station is included in the system,
there is also an I/O Box with a similar set of relays. These
relays will then be used instead of the ones in the Level
Unit’s Power Block. Only the relay for the IG extreme pressure alarm is unique for the Level Unit.
There is an RS-232 connector and a power outlet located in
the Power Block for connecting a service PC to the Level
Unit.
5.11.1 Fuses in the Power Block
There are six fuses that protect the two intrinsically safe
transformers. To maintain the intrinsic safety, it is very important to use correct fuses when replacing them. See the
Spare Parts List at in chapter 10 of this manual.
5.11.2 Replacing the Power Block
If the Power Block is faulty, replace it as a whole unit.
1. Remove the cover plate below the Power Block.
2. Remove the connectors.
3. Remove the four nuts holding the Power Block.
4. Check that setting of the power supply is correct on
new Power Block. The setting of the switch is marked
Third edition, June 1997
73
Service Manual
5. Mount the new Power Block. Tighten the four nuts.
6. Replace the cable connectors.
6 Transmitters
There are two types of Transmitters with different antennas
available with the Saab TankRadar:
• Parabolic Antenna Transmitter
• Cone Antenna Transmitter.
The Transmitters are prepared for inert gas pressure measurement, Local Display, and connection of up to five Pt 100
sensors. Three of these temperature sensors can be placed in
a tank mounted thermowell. The remaining two inputs can
be used for additional Pt 100 sensors, for example from
heaters.
on the label on the front of the Power Block since the
switch is located inside it.
When cargo tank temperature measurement is included the
Temperature Connection Box is located on top of the thermowell and connected via a cable to the Transmitter. The Tem-
Electronic
Module
IG pressure
sensor (option)
Ullage
plug
Parabolic
Transmitter
Socket
reflector
Antenna
Feeder
Wire
terminal
Cable
inlet
Cleaning
Hatch
(option)
74
Deck
Figure 6-1. Cross-cut of the Parabolic Antenna.
Third edition, June 1997
Service Manual
Electronic
Box
IG pressure
sensor (option)
Cable inlet
Protective
hose (option)
Insulation
Stainless steel
cone antenna
Figure 6-2. Cross-cut of the Cone Antenna.
perature Connection Box may be deck mounted or pump
mounted.
There is a wire terminal within the transmitter housing used
for connection of the optional sensors, the Local Display and
the cables to the Level Unit.
The electronics for the Transmitter are intrinsically safe and
are placed in the Electronic Box. The same type of Electronic
Box is used for both types of Transmitters. The function of
the Transmitter can be tested with the Transmitter Test Cable,
see chapter 6.2 below.
6.1 Replacing an Electronic Box
The Electronic Box is placed inside the transmitter housing.
See figures 6-1 and 6-2.
The Electronic Box can be replaced while the system is operating. Avoid letting water into the transmitter housing.
Handle with care and make sure the wire terminal is clean
and dry.
Third edition, June 1997
Note: The Electronic Box is waterproof and must not be opened.
Always replace the entire Electronic Box if it is faulty.
75
Service Manual
Note: Make sure the interior of the transmitter housing is completely dry and clean before replacing the cover. Encased water or
damp cause corrosion of the terminal block and wire leads causing
contact fault. Wipe with a clean and dry cloth if necessary.
Follow the steps below when removing the Electronic Box:
1. Parabolic Antenna: Open the transmitter housing by
removing the eight bolts for the cover.
Cone Antenna: Open the transmitter housing by loosening and removing the large clamp ring around the
rim of the cover.
2. Loosen the strap and lift the Electronic Box straight up.
Be careful not to touch or damage the top Teflon part of
the Antenna Feeder.
3. Place the Electronic Box upside down.
4. If the wires to the wire terminal have not previously
been marked, mark them before removing them. Remove the wires from the terminal. If system is switched
on, avoid short circuiting the wires.
5. Connect the wires to the new Electronic Box.
6. Mount the Electronic Box. See to it that the pin on the
Electronic Box fits into the groove on the antenna
feeder.
7. Tighten the strap so the Electronic Box cannot move.
8. Parabolic Antenna: Check that the space inside the
transmitter housing is clean and dry before replacing it.
Make sure the rubber gasket for the transmitter cover is
correctly placed and tighten the bolts cross-wise.
Cone Antenna: Check the O-ring and its groove are
clean and dry. Check that the space inside the transmitter housing is clean and dry before replacing it. Tighten
the clamp ring.
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6.2 Transmitter Test Cable
In the spare parts set on board there is a Transmitter Test
Cable. Use this cable to check the function of the Electronic
Box of the Transmitter.
There is a distance printed on the Test Cable. It will differ
from the ullage shown by TankRadar when the Test Cable is
applied on the Transmitter. The distance should be within
±10 % of the distance stated on the Test Cable corrected for
the A-distance (the A-distance is shown in the Transmitter
Data-window, see chapter 3.9). It can be used to see that the
Transmitter is working properly. However, the main function
of the Test Cable is to check the amplitude value, see figure
6-3.
1. Remove the Electronic box according to steps 1-3 in
chapter 6.1 above.
2. Place the Test Cable into the Electronic Box.
3. The function of the Electronic Box can be checked either
from the Backup Display or the Work Station.
4. On the Work Station, check value of amplitude postfilt
in the Transmitter Data-window, see chapter 3.9. On the
Backup Display, check the Register-frame in the Service
part. Check register number 21 (amp_post_filt).
Service Manual
Figure 6-3. The amplitude
from the Test Cable varies
with ambient temperature
and is different for individual Test Cables. The
rated amplitude for 20
°
C
ambient temperature, is
printed on a label on each
Test Cable. The shaded
area in the diagram shows
the acceptable amplitude
for a Test Cable with a
rated amplitude of 2000
mV. When the amplitude
printed on the label is
other than 2000 mV, the
shaded area can be moved
up or down so that its
centre corresponds to its
printed amplitude.
1600
Amplitude
(mV)
5000
4000
3000
2500
2000
1500
1000
900
800
700
600
500
-30-20-10010203040506070
Amplitude
(mV)
5000
4000
3000
2500
2000
1500
1000
900
800
700
600
Temp
(°C)
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Service Manual
Check that the amplitude is within the shaded area according
to figure 6-3. If it is not, exchange with new Electronic Box.
6.3 Cleaning the Antenna
The only regular maintenance required is cleaning of the
transmitter antenna. No general intervals can be stated, as
cleaning intervals depend on the carried cargo. There is an
automatic test function in TankRadar, indicating when antenna cleaning is required. A warning-message, stating
which Transmitter that needs cleaning, is displayed on the
Work Station.
The warning comes up if the reflected signal from the surface
during a period of 5 hours is too weak. Other failure functions override the above indication.
The cleaning of the antennas is carried out differently on the
Parabolic Antenna and the Cone Antenna.
Figure 6-4. Brush cleaning the Parabolic Antenna.
6.3.1 Cleaning the Parabolic Antenna
Follow the steps below when cleaning the Parabolic Antenna:
1. First clean the Teflon on the antenna feeder, following
the ”Brush cleaning” instructions below.
2. Wait half an hour. If there is still the warning-message,
check if the parabolic antenna has any moisture on it. If
it has, clean it according to the instructions in “Cleaning
by Hand” below. Also check if there is something between the parabolic antenna and the surface of the
liquid. If so remove it.
3. If the warning message is still there after another half
hour, please contact Saab Marine Electronics Service
Department or a service agent for further assistance.
See chapter 12 for a complete list of the service agents.
6.3.2 Brush cleaning the Parabolic Antenna
The cleaning with the cleaning brush can take place while the
tank is in operation and while it is pressurized with inert gas.
1. Remove the cleaning hole plug on the cleaning hatch on
the transmitter socket.
2. Connect the grounding wire of the cleaning brush to the
ullage plug or some other suitable place where a good
grounding is achieved.
3. Push the Teflon adapter into the plug hole. The check
valve on the inside is now opened.
4. Insert the brush to the first mark on the brush shaft.
5. Move the brush between the first and the second marks
on the brush holder.
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Service Manual
6. Clean both sides of the antenna feeder in the same way.
7. Remove the brush and the Teflon adapter, and replace
the cleaning hole plug.
6.3.3 Cleaning by Hand
Before cleaning, the inert gas pressure must be reduced. Also
observe local environmental, safety and health regulations.
1. Open the cleaning hatch.
2. Clean the antenna feeder and the parabolic reflector
with a rag. If necessary, use a suitable solvent.
6.3.4 Cleaning the Cone Antenna
Before cleaning, the inert gas pressure must be reduced. Also
observe local environmental, safety and health regulations.
1. Remove the transmitter cover.
2. Loosen the strap and remove the Electronic Box.
3. Remove the large nut by turning its handle counter
clockwise.
4. Carefully lift the Waveguide Cone straight up.
5. Clean the inside of the Cone Antenna through the opening (Ø50 mm).
6. Carefully clean the inside of the Waveguide Cone. Be
careful with the Teflon-cone inside the Waveguide
Cone.
7. Replace the Waveguide Cone. Be careful not to damage
the O-rings on the Waveguide Cone.
8. Replace Electronic Box and the Transmitter Cover.
9. If there is still a clean antenna warning for the Transmitter after half an hour, please contact Saab Marine Electronics Service Department for further assistance.
Figure 6-5. Turn handle
to remove the Waveguide
Cone.
Third edition, June 1997
Be careful not to damage
this teflon plug
Turn this
handle
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Service Manual
6.4 Inert Gas Pressure Sensor (Option)
IG Pressure Sensor in
Parabolic Antenna
Transmitter
IG Pressure Sensor
in Cone Antenna
Transmitter
Figure 6-6. The IG pressure sensor in the Parabolic and the Cone
Antennas.
WARNING!
Closed tank condition can not be maintained when removing the
gas pressure sensor. The tank atmosphere is exposed to deck environment. The IG-pressure sensor must not be removed without
permission from officer in charge.
Note: The inert gas pressure sensor is an optional equipment
installed in the Transmitter Unit at the delivery.
The inert gas pressure sensor is installed in the Transmitter
housing. The installation differs slightly between the Parabolic Antenna and the Cone Antenna. See figure 6-6.
The sensor is in contact with the tank atmosphere through
the nipple and either through the bottom of the transmitter
housing or through the Waveguide Cone. These holes can
become clogged and may need to be cleaned.
The IG pressure sensor measures the pressure relative to the
atmospheric pressure outside the transmitter housing. There
is a small venting hose from the sensor to a nipple in the wall
of the transmitter housing for the reference atmospheric
pressure.
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Service Manual
Note: The sensor must be fitted to the vent hole by means of a
Nylon hose.
Note: Make a note of how the leads are connected to the wire
terminal on the Electronic Box before you disconnect the leads.
6.4.1 Cleaning the Inert Gas Pressure Sensor
Follow the steps below when cleaning the IG pressure sensor:
1. Open the cover to the transmitter housing.
2. Disconnect the leads to the IG-sensor and remove the
sensor.
3. Remove the sensor and the nipple.
4. Do not attempt to clean the sensor itself as it can easily
be damaged. Clean the nipple and the screw in the
mounting assembly as well as the opening in the bottom of the Transmitter housing or into the Waveguide
Cone.
6.4.2 Replacing the Inert Gas Pressure Sensor
Follow steps 1-3 above (chapter 6.3.1) to remove the sensor.
Follow the steps below when replacing the IG pressure
sensor:
1. Install the new sensor in the same way as the one you
have just removed. Original or new gaskets must be
used.
2. On Parabolic Antenna: Tighten screw through the
banjo nipple to 75 Nm (55 lbsft) torque.
On Cone Antenna: Tighten cap nut to 55 Nm (40 lbsft)
torque.
3. Be sure to connect the electrical leads and the vent hose
in the same way as before. The vent hose must not be
folded or squeezed.
Note: A zero pressure calibration of the IG pressure sensor must be
done when it has been replaced.
6.4.3 Zero Pressure Calibration of IG Pressure Sensor
Make sure that the tank is ventilated and that it has atmospheric pressure. Be aware that a strong wind into a tank
opening can change the pressure inside the tank quite considerably.
Third edition, June 1997
Read chapter 3.28 “IG Pressure Zero Adjust” for a description of how to adjust the IG pressure sensors.
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Service Manual
6.5 Dismounting of Antenna Feeder of the Parabolic Antenna
The antenna feeder is mounted in the centre of the trunk and
its upper part is engaged in the Electronic Box. Replacement
can be carried out when the system is operating.
Important!
When removing the antenna feeder the tank must be opened. Permission from officer in charge must be obtained before the service
- +
FORE
work commences.
Figure 6-7.
Figure 6-8.
Figure 6-9.
Figure 6-10.
SB
- +
NOTE !
FORE
SB
- +
6.5.1 Disassembly
1. Begin by removing the Electronic Box according to
chapter 6.1.
2. Note the exact position of the adjustment scales. Take a
reading of both FORE and SB (starboard) scale positions
over the clamp ring edge.
3. Remove the adjustment scales assembly from the antenna feeder.
- +
4. Loosen and remove the eight nuts securing the clamp
ring.
5. Remove the clamp ring by lifting it straight up.
6. Lift the antenna feeder straight up and remove it, but
leave the gasket in its original place. If the gasket is
damaged it must be replaced with a new one.
6.5.2 Reassembly:
1. Insert the antenna feeder in the socket. Make sure the
wings of the antenna feeder point to the cleaning hatch
plane, thus allowing brush cleaning of the Teflon plug
on antenna feeder through the cleaning hatch.
2. Mount the clamp ring. Apply molybdenum sulphide
paste on threads. Mount the nuts loosely, but do not
tighten.
3. Install the adjustment scales assembly, and adjust the
FORE scale pointing forward and the SB scale pointing
starboard.
4. Adjust the antenna feeder in its original position using
the adjustment scales.
5. The clamp ring nuts are tightened to different torques
depending on which type (color) of gasket is used
under the clamp ring. Tighten the nuts to the following
torque:
• Brown gylon gasket = 75 Nm
• Blue gylon gasket = 45 Nm
• White gylon gasket = 75 Nm
Tighten the clamp ring nuts in a uniform, crosswise
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Third edition, June 1997
pattern with a dynamometric wrench. Then check the
antenna feeder position once again. Readjust if necessary. The gasket settles down, so tighten the nuts to the
torque shown above, again after two hours.
6. Install the Electronic Box.
Note: Before replacing the transmitter cover, make sure the interior
of transmitter housing is completely dry and clean. Encased water
or damp cause corrosion of the terminal block and wire leads causing contact fault. Wipe with a clean and dry cloth if necessary.
7 Temperature Sensors (Option)
The Pt 100 temperature sensors are optional equipment
installed separately in a sealed pipe submerged in the tank.
Up to three temperature sensors are used to measure the
cargo temperature.
The sensors are connected to a wire terminal inside the Temperature Connection Box. From this wire terminal there is a
cable to the wire terminal in the transmitter housing.
Service Manual
If there is an ERROR-status on one or more temperature
sensors, these may need to be replaced.
Wire
terminal
Pipe
Protective hose
(Option)
Thermowell for
temperature sensors
stand
Figure 7-1. Temperature Connection Box.
7.1 Checking a Temperature Sensor
The Pt 100 temperature sensor has a near linear relation
between resistance and temperature. 0°C corresponds to 100
Ω and 100°C corresponds to 138,5 Ω. The relation between
the temperature and the resistance is shown in figure 7-3.
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Service Manual
When checking the resistance of a Pt 100 sensor, observe the
additional resistance of the connecting leads, which can be
either in a 3-wire or 4-wire configuration.
Note: For service of temperature sensors, strictly observe the safety
regulations for intrinsic safety, see chapter 2.1.
white* (Only on
R
Pt 100
Figure 7-2.
4-wire sensor)
white*
red*
red*
* DIN Standard
Use a certified battery operated multipurpose instrument to
check the resistance of the Pt 100 element. The cable leads are
colored according to the DIN Standard - white, (white), red
and red.
A
1. Begin by opening the cover of the Temperature Connection Box and disconnect the leads to the Pt 100 element
B
you want to check.
2. Measure the resistance between two red cable leads to
establish the lead resistance (B). Then measure the
resistance between white and red leads to get the total
resistance (A). The resistance of the Pt 100 elements:
R
= A-B Ω
Pt
Check corresponding temperature in figure 7-3. If the
derived temperature (R
) is not equal to the actual
Pt
temperature, replace the Pt 100 element.
3. Check the insulation to ground. Measure the resistance
from each of the leads to the inside of the Temperature
Connection Box. If any resistance is below 10 MΩ,
replace the Pt 100 element. See also chapter 9.14.
Figure 7-3. Relation
between temperature and
resistance.
Resistance
(Ohm)
130
125
120
115
110
105
100
010203040506070
80
Temp
(°C)
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7.2 Replacing a Faulty Temperature Sensor
To replace a faulty Pt 100 element, proceed as follows:
1. Remove the cover of the Temperature Connection Box.
2. Loosen the cap nut completely.
3. Loosen the adapter nipple using the box spanner from
the spare parts set.
Cap nut
Metal
packing
Figure 7-4.
Adapter
nipple
4. Pull out the temperature sensor completely.
5. Insert a new temperature sensor completely. If it is not
entered completely the cover will not fit. Tighten the
adapter nipple first using the box spanner.
6. Make sure the conical metallic packing is correctly
fitted in the cap nut, and then tighten the cap nut securely.
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Third edition, June 1997
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Service Manual
8 Tank Display Unit (Option)
Press to display tank level with one LED
%
100
80
point on the bargraph. Press again to
change back to bargraph mode.
Hi.Hi alarm indication
Hi alarm indication
60
40
20
0
R
COMMON
ALARM
M
Ft
LED display for ullage/innage or alarm levels
Figure 8-1. Tank Display Unit for ullage indication.
8.1 Replacing a Tank Display Unit
1 2 3 4 5 6 7 8
OPEN
1248163264128
Binary
Code
Example:
Tank 10
Figure 8-2. In the example the switches have been
set to address Transmitter
in tank number 10.
1. Begin by loosening the four panel screws and pull the
TDU out of its console.
2. Disconnect the wires to the terminal block on the back
of the TDU board.
3. Before you install the new TDU you must address the
TDU with its unique number. Set the address switch to
the same positions as on the TDU you are replacing.
The address switches are located in the middle of the
TDU board, and accessed through an opening in the
black cover plate. The positions of the switches represent a binary ”1” or ”0”.
Note: Use a slightly blunt object to set the DIL switch. Do not use
a lead pencil as some of the lead might come off and damage the
switch.
Bargraph indicates percentage of full tank
Press to display Hi alarm limit on the numeric
LED display. If the Hi alarm is blocked, the
display shows "99.99".
Press to display Lo alarm limit on the
numeric LED display. If the Lo alarm is
blocked, the display shows "99.99".
Lo alarm indication
Lo.Lo alarm indication
Press to accept Hi.Hi, Hi, Lo or Lo.Lo alarms.
COMMON ALARM indication of alarm on
any parameter in this tank. Accept from W ork
Station.
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Service Manual
RESET
F 1
F 2
F 3
8.2 Checking the Tank Display Power Supply Unit
The Fl, F2 and F3 fuses (ratings 250 V/4 A) are located on a
separate fuse panel.
1. Loosen the four screws to remove the cover.
2. Check if the fuses are intact. Replace if necessary. Also,
reset the circuit breaker next to the transductor by
pressing the reset button between the side panel of the
unit and the interior vertical panel.
3. Replace the cover and tighten the bolts.
Third edition, June 1997
Figure 8-3. Checking the TDU Power Supply Unit.
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Service Manual
9 Fault Finding on the Saab TankRadar System
Whenever there are symptoms in the system that may indicate that there is some failure, please start the fault finding
by looking at the following pages. Look for a similar symptom as the one your TankRadar system is having, and then
look for the cause and the action to take in order to fix the
failure.
The symptoms are printed to the far left in bold text. On the
line below is one or more descriptions of what is possibly
causing the symptoms. Below each cause there are a number
of suggested actions preceded by bullets (•). Both causes and
actions are listed so that the ones that are most likely to
happen or easiest to fix are placed first.
Abbreviations used in the fault finding chart:
LCB - Backup Display in Level Unit.
LCI - Interface Board in Level Unit.
LCM - Processor Memory Board in Level Unit.
LCS - Signal Board in Level Unit.
LED - Light Emitting Diode.
LI - Transmitter Interface in Level Unit.
LP - Power Block in Level Unit.
LU - Level Unit.
WS - Work Station.
9.1 SysFail and Warning Messages Shown on the Work Station
9.1.1 SysFail message: Level Unit SysFail.
Level Unit may not be switched on.
• Press power switch in Level Unit to setting “1”, see chapter 5.3.
Mains power supply to Level Unit may be failing.
• Check power supply, cable and fuses. See chapter 5.11.
Fuses in Power Block of Level Unit might be blown.
• Check cause of blown fuse. Replace burnt fuses, see spare parts list in
chapter 10.
• If system is new, check setting of voltage in Power Block in the Level
Unit. Voltage setting is marked on the Power Block. See chapter 5.11.
LCM Board faulty.
• See chapter 5.6.
Communication to one or more LIs within the Level Unit has failed.
• See chapter 9.1.3 and 9.1.4 below.
9.1.2 SysFail message: Level Unit Communication Failed.
I/O Box may not be functioning.
• Check mains power supply and power cable to I/O Box. Check
setting of voltage in I/O Box. See chapter 4.
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Service Manual
Contact fault between Work Station and I/O Box or between I/O Box and
Level Unit.
• Check cable and connectors.
Serial port Com 1 or Serial Interface Board in Work Station faulty.
• Check Service window “Communication I/O Box” on Work Station.
See chapter 3.30.
The RS 485 Interface Board in location Com 4 in I/O Box faulty.
• Check that LEDs in I/O Box are flashing, see chapter 4.
Interface Board (LCI) in Level Unit faulty.
• See chapter 5.7.
9.1.3 SysFail message: Level Unit Power Failure.
Power failure to LI.
• Check status of LIs in Service window Level Unit: LI Status. See
chapter 3.16
• Check fuses in the Power Block (LP), see chapters 5.11 and 10.
9.1.4 SysFail message: Level Unit LI Communication Failed.
Contact fault on cable between Calculation Unit and Transmitter Interface
(LI).
• Check status of LIs in Service window Level Unit: LI Status. See
chapter 3.16.
• Check cables and connectors inside the Level Unit.
• Check if LCM is functioning, see chapter 9.1.7.
• Check setting of switch for addressing of the LI, see chapter 5.10.5.
Power failure to LI.
• See chapter 9.1.3 above.
LI faulty.
• Replace LI. If the system is equipped with more than one LI, try
exchanging the LIs. See chapter 5.10.8 “Replacing a Transmitter
Interface”. Check result.
9.1.5 SysFail message: I/O Box Communication Failed.
Mains power supply to I/O Box failing.
• Check that I/O Box has power and is running. See chapter 4.
Communication cables faulty.
• Open the cover and watch the LEDs on the main board at the bottom
of the box. See chapter 4.1.
• Check communication cables.
Serial Interface Board in Work Station faulty.
• Restart the Work Station (if more than one Work Station – restart the
Master Work Station) by pressing the Reset-button. See chapter 3.1.
9.1.6 Warning message: Level Unit Ground Failure.
Ground Failure on one or more LIs.
• Read chapter 9.14 for information on how to find the cause of the
ground failure.
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Service Manual
9.1.7 Warning message: Level Unit Memory Failure.
LCM Board faulty.
• Restart Level Unit and check Service-window LCM Status on Work
Station. If box “DF database loaded” is checked, memory in LCM
Board is not working and LCM Board needs to be replaced. See
chapter 3.14 and 5.6.1.
• In Service-window LCI Status, check LCM status, see chapter 3.15. If
LCM is faulty, replace LCM board.
9.1.8 Warning message: Level Unit Restarted.
This message is shown while the Level Unit is starting up after the power
has been switched off and on again or after it has been ordered to restart
after downloading software into the LCI or LCM.
• Wait a few minutes until the Level Unit has started up, then accept
the warning in the Warning Summary-window.
9.1.9 Warning message: Master Communication Failed.
Communication cables faulty to the master equipment (normally a load
calculator) connected to the I/O Box.
• Check cables between master and I/O Box.
Master is not turned on or power supply failing.
• Turn master on or check power supply, cables and fuses.
I/O Box failure.
• See chapter 9.1.5.
RS-232 board for master communication in I/O Box faulty.
• Try exchanging with another RS-232 board, either from the Complete
Spare Parts set or if another RS-232 board is used in the I/O Box. See
chapter 4.2.
9.1.10 Warning message: LevelDatic Communication Failed.
Communication cables faulty from the I/O Box to the LevelDatic
equipment.
• Check cables between LevelDatic and I/O Box.
LevelDatic is not turned on or power supply failing.
• Turn LevelDatic on or check power supply, cables and fuses.
I/O Box failure.
• See chapter 9.1.5.
Duplex setting on the RS-485 board is incorrect
• Check setting of jumpers on board, see chapter 4.3.
RS-485 board for LU communication in I/O Box faulty.
• Try exchanging with another RS-485 board, either from the Complete
Spare Parts set or from another serial channel in the I/O Box.
However, do not remove the RS-485 Board in location Com 4 as you
will loose the communication with the Level Unit. See chapter 4.3.
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Third edition, June 1997
9.1.11 Warning message: SIOX Communication Failed.
Communication cables faulty from the I/O Box to the SIOX equipment.
• Check cables between SIOX and I/O Box.
Mains power supply failing to SIOX (Mains to box or 24 VDC to each
SIOX module).
• Check power supply, cables and fuses.
I/O Box failure.
• See chapter 9.1.5.
Single SIOX module failing
• Check LEDs on each SIOX module. See chapter 4.4.
SIOX Interface Board in I/O Box faulty.
• Try exchanging with another SIOX board from the Complete Spare
Parts set. See chapter 4.4.
• Check the fuse for external supply voltage on the SIOX board
9.1.12 Warning message: PRS Communication Failed.
Communication cables faulty from the I/O Box to the PRS equipment.
• Check cables between PRS and I/O Box.
Mains power supply failing to PRS.
• Check power supply, cables and fuses.
I/O Box failure.
• See chapter 9.1.5.
PRS Interface Board in I/O Box faulty.
• Try exchanging with a spare PRS board. See chapter 4.5.
• Check the fuse for external supply voltage on the PRS board
Service Manual
9.2 Other Messages Shown on the Work Station
9.2.1 Message: PROCESS DATABASE NOT RUNNING - Alarm handling is off
and pictures are not updated. Please wait until system restart.
If shown on the Master Work Station there is a serious fault in it. If the
Work Station keeps trying to start up over and over again try the
following:
• Reinstall the Work Station Software, see chapter 3.6.
• If problem persists: Replace hard disk, see chapter 3.2.
• If problem persists: Replace Work Station. See chapter 3.3.
9.2.2 Message: NO CONTACT WITH MASTER WORKSTATION - Network
Error or Master Work Station not running. Please wait until connection
established.
This message is shown on the Slave Master Work Station in a network
system, when the Master Work Station is not communicating.
Master Work Station is not turned on or power supply is failing.
• Turn the Master Work Station on.
The Master Work Station is starting up.
• Wait approximately one minute to allow the Master Work Station to
start up.
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Service Manual
If there are more Slave Work Stations, check for any messages on these.
• If only one slave Work Station has the message “NO CONTACT
WITH MASTER WORK STATION”, concentrate your fault finding
on this Work Station.
• If all Slave Work Stations have the message displayed, check Master
Work Station, the network cables or the Network Board in the Master
Work Station.
If Master Work Station is turned on and running without any problems:
• Check cables between the Master and Slave Work Station.
• Check Network Board in both Slave and Master Work Station.
9.3 Channels with status CFAIL, ERROR or INVAL
9.3.1 CFAIL status on one Transmitter
Cables from Level Unit to Transmitter faulty
• Disconnect Transmitter cables at Transmitter Interface (LI) in Level
Unit and check cables to Transmitter.
• Interchange connectors of failing Transmitter with one that is OK.
Watch these two channels on Work Station. If failing Transmitter
becomes OK, find a spare connection on LIZ. Connect the
Transmitter and configure to new address using Transmitter Datawindow in the service part of the Work Station software.
LIZ board in LI may be faulty
• If there are two LIs in the Level Unit, try exchanging them to find out
if it is broken. See chapter 5.10.8 for information on how to change an
LI.
• Exchange with LIZ board from the Complete Spare Parts set. See
chapter 5.10.9.
Faulty Electronic Box
• Replace Electronic Box, see chapter 6.1.
9.3.2 CFAIL status on five Transmitters
LIZ board in LI may be faulty
• Check if the five Transmitters are connected to the same LIZ board in
the LI (that the connectors are placed in a vertical row). If they are,
the LIZ board needs to be replaced. See chapter 5.10.9 for information
on how to replace it.
• Exchange with LIZ board from the Complete Spare Parts set. See
chapter 5.10.9.
9.3.3 ERROR status on one Transmitter, but not CFAIL status
Surface echo is lost. There can be waves, turbulence or foam on the surface
of the product. A very large list angle could also cause the echo to be lost.
• Wait while system searches for the surface echo.
• Order an echo search on that tank from the TX Service-window in the
Service-part of the Work Station software. See chapter 3.25.
Faulty Electronic Box
• Replace Electronic Box, see chapter 6.1.
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9.3.4 Warning “Clean antenna on tank XXX”
If the signal strength is reduced due to a thick layer of cargo or other
contamination on the antenna, this warning will be displayed.
• Clean antenna. See chapter 6.3 for cleaning of the antennas.
9.3.5 All warnings associated with one tank shown on Work Station
If warnings about communication failure, error etc. are shown for a single
tank, the cabling might be broken.
• Check cabling between faulty Transmitter and Level Unit.
If there is a warning on Level Unit ground failure, there may be water
within the Transmitter housing or in any associated cable connection box.
• Check inside of transmitter housing. Clean and dry out if necessary.
9.3.6 ERROR status on one temperature sensor
Faulty cabling between Transmitter and temperature sensor.
• Check cabling and, if necessary, repair.
Temperature sensor faulty.
• Replace temperature sensor. See chapter 7.2.
9.3.7 INVAL status on average temperature
This message normally does not indicate any fault. None of the
temperature sensors are below the product surface (immersed in the
liquid).
• Check Tank Setup-window for tank in question on the Work Station.
Sensors that are immersed in the product are shown with INCL in
the Mode column. See Operating Manual.
9.3.8 ERROR status on one IG pressure sensor
Cable to sensor may be faulty
• Check cable between sensor and cable terminal on Transmitter.
Sensor may be supplying a signal that is out of range
• Try to zero adjust the sensor and if that is not possible, replace the
sensor. See chapter 6.4.
9.4 Work Station
9.4.1 Work Station screen blank.
Monitor not turned on.
• Check that switch on the front panel below the screen is set to “1”.
See chapter 3.5.
Incorrect brightness/contrast setting.
• Change setting, see chapter 3.5.
Contact fault between PC and monitor
• Check cables and connectors between PC and monitor.
Power supply to monitor failing
• Check power supply to PC and from PC to monitor, cables and fuses.
Setting of BNC – D-Sub incorrect on front of monitor.
• Switch setting to D-Sub position, see chapter 3.5.
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9.4.2 Work Station monitor image located incorrectly, distorted or discolored.
Static field distorting the image.
• Press the degauss-switch, see chapter 3.5.
Image settings incorrect.
• Adjust image settings, see chapter 3.5.
Some object is disturbing the magnetic field controlling the image.
• Check for any large metal object, radio transmitter, magnet or
transformer placed close to the monitor.
9.4.3 No new windows can be opened on the Work Station or Work Station cannot be started.
Hard disk failure or software incorrect.
• Install new software, see chapter 3.6. Start the Work Station. If it is
still not possible start it, replace the hard disk, see chapter 3.2.
9.4.4 Light Pen is not functioning
The setting of the light intensity of the monitor is too low.
• Increase light intensity, see chapter 3.5.
Cable or Light Pen is faulty or disconnected.
• Check cable and connectors.
• Replace Light Pen. It is included in the Complete Spare Parts set.
• Use arrow-keys on keyboard to move the cursor. Hold an arrow-key
down to move the cursor quickly.
Light Pen Interface Board in PC is out of order.
• Replace Light Pen Interface board, see chapter 3.4.
9.5 Level Unit
9.5.1 Backup Display is blank.
The display automatically switches off after approximately 20 minutes
after the last key pressing.
• Press any key on the keyboard.
9.5.2 No response when pressing the keys on the Backup Display’s keyboard.
Connectors or flat cable between LCI and Backup Display is faulty.
• Check cable with connectors. If necessary, repair or replace cable.
Display or keyboard is broken
• Replace the Backup Display (including keyboard).
LCI board is not functioning
• Check LCI board. If faulty, exchange the board. See chapter 5.7.
9.5.3 Watch Dog LED on LCI board is on (the lowest LED)
LCI Board might be faulty
• Restart Level Unit and then watch the LCI’s watch dog LED. Check
Work Station for message “Level Unit Communication Failed”. If
watch dog LED goes on again, replace the LCI board, see chapter 5.7.
9.5.4 Backup Display shows “No flash program”
LCI Software faulty
• Load new software into the LCI. See chapter 3.23.
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9.6 Transmitters
9.6.1 Ullage indication not updated close to empty tank.
Too weak radar echo due to inclined bottom or sludge on tank bottom.
• Ullage indication will be resumed when the tank is loaded again.
9.7 Local Display
9.7.1 Local Display blank
Setting of display mode may be incorrect.
• Check setting either on Backup Display in Level Unit, see chapter
5.9.4, or from the Transmitter Data-window in the Service part of the
Work Station, see chapter 3.9.
Cabling between Local Display and Transmitter may be faulty.
• Restart Transmitter and Local Display by disconnecting the
connector for that Transmitter on the LI, and then connect it again.
Check if the Local Display starts working.
• Check cabling, and repair if necessary.
Saab TankRadar system may be starting up.
• Wait approximately 15 min and then check if the Local Display
works.
Communication failure to Transmitter.
• Check for CFAIL status on Transmitter. See chapter 9.3.5.
Service Manual
9.8 Temperature Measurement
9.8.1 Incorrect temperature values on one tank
Incorrect setting of temperature range
• Check temperature range in Cargo Tank Sensors-window in
Configuration part of Work Station software. If necessary, change to
correct range and restart Transmitter by disconnecting and
connecting its cable at the LI in the Level Unit.
9.9 Inert Gas Pressure Measurement
9.9.1 Incorrect reading of the IG pressure
IG Pressure sensor not correctly zero adjusted.
• If, or when, conditions allow it, do a zero adjustment of the IG
pressure sensor. See chapter 6.4.
Venting hose of the sensor may be clogged or squeezed.
• Check that the venting hose ventilates to the outside of the
Transmitter housing. See chapter 6.4.
IG pressure sensor may have been subjected to a too high pressure (more
than twice the maximum range).
• Zero adjust sensor. See chapter 6.4.
• If it is not possible to adjust, replace it. See chapter 6.4.
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9.9.2 Indicated inert gas pressure always the same
IG pressure sensor’s opening to the tank may be clogged.
• Clean the sensor’s opening to the tank. See chapter 6.4.
IG pressure sensor faulty.
• Replace sensor, see chapter 6.4.
9.10 Tank Display Unit
9.10.1 Display on TDU not working.
No voltage supply
• Check fuses in TDU-Power Supply. See chapter 8.2.
• Check power cables and DC distribution to TDUs.
Communication failure
• Check communication cables
• Check I/O Box. See chapter 4 and 9.4.
9.11 Portable Readout System:
9.11.1 Indication of communication error (CERR) on PRU.
Low walkie-talkie battery voltage
• Charge battery. This may be necessary even if voice communication
works.
Bad radio conditions.
• Move PRU (walkie-talkie) to another position. This may be necessary
even if voice communication works.
• Check base radio antenna.
Low volume control on either radio.
• Increase volume control.
Incorrectly adjusted squelch control on either radio.
• Adjust squelch (if any) to low level without noise between
transmissions.
9.11.2 No voice communication between walkie-talkie and base radio (PRS).
No power supply.
• Check batteries in walkie-talkie and power supply to base radio.
Unit faulty.
• Replace units one by one: base radio, walkie-talkie, PRU, PRS
Interface Board in I/O Box.
Cable faulty.
• Check the cabling between base radio and I/O Box.
9.11.3 No display on PRU.
Low walkie-talkie battery voltage
• Walkie talkie battery needs to be recharged
PRU cable faulty.
• Replace cable.
PRU faulty.
• Replace.
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9.12 Draft measurement
9.12.1 Draft measurement incorrect
Failure on LevelDatic equipment
• Check LevelDatic equipment. See separate documentation in "Asbuilt drawings and user's manual"-binder.
Incorrectly configured data for draft measurement.
• Check that configured ship data in Ship measures-window on Work
Station correspond to real distances on ship.
Faulty communication with LevelDatic equipment.
• See chapter 9.1.10.
9.13 Load Calculator
9.13.1 Values displayed on TankRadar and load calculator differ.
Ullage values differ due to a delay of information during quick loading or
discharging, especially in small tanks.
• When the surface is stable, wait for approximately one minute to see
that the values become equal.
• Concentrate on ullage values displayed on TankRadar since they are
updated more often than on the load calculator.
Trim/List correction is set to off on Work Station, but the protocol to the
load calculator is using trim/list corrected values.
• Check setting of trim/list correction in the Setup-window. See
Operating Manual.
Presentation units changed from m to feet or vice versa.
• Check setting of units in the Setup-window. See Operating Manual.
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9.14 Finding Cause of Ground Failure Warning
When the warning message “Level Unit Ground Failure” is
displayed on the Work Station or when the ground failure
LED on a Transmitter Interface in the Level Unit lights up,
there is a need to find the cause of the ground failure.
The ground failure could be located in the cables between the
Transmitter and Level Unit or between Transmitter and
temperature sensors, IG pressure sensors, extra temperature
sensors or Local Display (if these options are included). It
could also be located within the units themselves or in their
wire terminals.
You need a multimeter when searching for a ground failure.
Follow the steps below to find the cause of the ground failure:
1. Open the LI Status-window in the Service part of the
Work Station Software. In this window the status of the
LI’s ComFail, GroundFail, +15 V and -15V are shown.
Find the LI that is causing the ground failure. Or check
ground failure LED on LI to find out which LI is causing the ground failure.
9.14.1 Ground Failure – Transmitter Interface
Note: Before pulling the connectors out, check that they are marked
so that they can be replaced correctly.
2. On the LI that is causing the ground failure, pull out the
connectors to the Transmitters one by one. Check when
ground failure LED goes off, to find which transmitter
that is causing the ground failure.
9.14.2 Ground Failure – Transmitter Cable
3. Check the cable between Transmitter and Transmitter
Interface in the Level Unit following the steps in chapter 9.14.8 below.
9.14.3 Ground Failure – Temperature Sensors
4. Check both temperature sensors and cable to temperature sensor by removing the wires to the temperature
sensors from the terminal in the transmitter housing.
5. Hold the wires together so that they are in contact with
each other and measure the resistance to ground. If the
resistance is larger than 10 MΩ go to step 10 below.
6. Check the cable between the Transmitter and the wire
terminal of the temperature sensors following the steps
in chapter 9.14.8 below.
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7. If there is no ground failure on the cable between the
Transmitter and the temperature wire terminal, you
need to check each individual temperature sensor.
8. Remove the wires to the temperature sensor from the
terminal inside the Temperature Connection Box.
9. Measure the resistance between each wire and ground
to find which temperature sensor is causing the ground
failure. Replace troubling temperature sensor with a
new spare sensor ordered from Saab Marine Electronics
or any of the service agents, see list of agents in chapter
12.
9.14.4 Ground Failure – IG Pressure Sensor
10. Remove the wires of the cable to the IG pressure sensor
(if included in system) from the wire terminal inside the
transmitter housing.
11. Hold all the wires of the sensor cable together so that
they are in contact with each other. Measure the resistance to ground, which should be more than 10 MΩ. If
it is, go to step 13 below.
12. If the resistance measured in step 12 is less than 10 MΩ,
replace the IG pressure sensor with a spare sensor. See
chapter 6.4.2.
9.14.5 Ground Failure – Extra Temperature Sensors
13. If there are extra temperature sensors connected (there
can be up to two extra sensors except for the one, two
or three inside the tank) these can also be the cause of a
ground failure. These extra sensors can either be connected to the wire terminal inside the transmitter housing or the temperature housing. Remove one sensor’s
wires from the terminal and hold them together. Measure resistance, which should be more than 10 MΩ. If it
is, go to step 15 below.
14. If the resistance measured in step 13 is less than 10 MΩ
replace with new spare sensor.
9.14.6 Ground Failure – Local Display
15. If a Local Display is connected to the Transmitter this
could also be causing ground failure. Remove all the
wires to the Local Display from the terminal inside the
Transmitter Housing.
16. Hold all the wires of the sensor cable together so that
they are in contact with each other. Measure the resistance to ground, which should be more than 10 MΩ. If
it is, go to step 19 below.
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17. If the resistance measured in step 16 is less than 10 MΩ,
check the cable between the Transmitter and the Local
Display according to the steps in chapter 9.14.8 below.
18. If the Local Display is causing the ground failure, try
cleaning and drying the inside of the display. If this
does not help replace the Local Display.
9.14.7 Ground Failure – Wire Terminals
19. If you have come this far in your search for the ground
failure, check the wire terminals. See chapter 9.14.9.
9.14.8 Checking a Cable for Ground Failure
Note: If the cables have not previously been marked, mark them
before removing them from the wire terminal.
1. Disconnect all wires in both ends of the cable. Make
sure the wires are not in contact with anything.
3. Hold all the wires of the cable together so that they are
in contact with each other and measure the resistance
between cable and ground (for example, use ground bar
inside the transmitter housing). If the resistance is
larger than 10 MΩ, the cable is OK.
4. If the resistance measured in step 3 is less than 10 MΩ,
measure between each single wire and ground to find
which wire that is causing the ground failure. When it
has been located, check if there is any spare wire in the
cable or lay a new cable.
9.14.9 Checking a Wire Terminal for Ground Failure
1. Remove all wires from the terminal. Measure the resistance between each terminal and ground. If the resistance is larger than 10 MΩ, the terminal is OK.
2. If the resistance is less than 10 MΩ, try to dry the terminal as well as spraying it with CRC666-spray or equivalent de-moisturizing spray.
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