Saab G3 manual

Third edition Copyright © June 1997 Saab Marine Electr onics AB ™ Service Manual[...]

2 Service Manual Third edition, June 1997 The contents, descriptions and specifications within this manual ar e subject to change without notice. Saab Marine Electr onics AB accepts no responsibility for any errors that may appear in this manual. As each Saab T ankRadar system is specially designed for each delivery , the contents and illustrations[...]

3 Service Manual Third edition, June 1997 Ov er vie w of Contents Guide to this man ual ............................................................................... 2 1 General Description of Saab T ankRadar ...................................... 10 2 General Information ....................................................................... 13 [...]

4 Service Manual Third edition, June 1997 Complete T able of Contents Guide to this manual ............................................................................... 2 Complete ser vice inf ormation ........................................................................... 2 Information on ho w to operate the Saab T ankRadar system ..........[...]

5 Service Manual Third edition, June 1997 3.25 Lev el Unit – TX Service ....................................................................... 46 3.26 Lev el Unit – Scan T ank ......................................................................... 47 3.27 Lev el Unit – Restar t LCI, LCM .....................................................[...]

6 Service Manual Third edition, June 1997 5.9 Backup Displa y , LCB ............................................................................. 68 5.9.1 Replacing the Backup Display ...................................................... 68 5.9.2 Description of the Service Frames ................................................ 68 5.9.3 Unit Frame[...]

7 Service Manual Third edition, June 1997 9 Fault Finding on the Saab T ankRadar System ............................. 88 Abbreviations used in the fault finding chart: .......................................... 88 9.1 SysFail and W arning Messa ges Sho wn on the W ork Station ........... 88 9.1.1 SysFail message: Level Unit SysFail. ...............[...]

8 Service Manual Third edition, June 1997 9.6 T ransmitters .......................................................................................... 95 9.6.1 Ullage indication not updated close to empty tank. ............. 95 9.7 Local Displa y ......................................................................................... 95 9.7.1 Loca[...]

9 Service Manual Third edition, June 1997 Abbre viations and Denominations: The following abbr eviations are used in this manual: LC - Calculation Unit LCB - Backup Display LCI - Interface Board LCM - Pr ocessor Memory Board LCP - Calculation Unit Power Supply LCS - Signal Board LI - T ransmitter Interface LIA - Analog/Digital/Power Boar d LIZ - Ze[...]

10 Service Manual Third edition, June 1997 1 General Description of Saab T ankRadar Saab T ankRadar is made up mainly by the following parts: • T ransmitters • Level Unit • W ork Station. These units ar e shown in figur e 1-1 below . All Saab T ankRadar Marine transmitters ar e intrinsically safe, pr oviding a number of benefits for the opera[...]

11 Service Manual Third edition, June 1997 The Saab T ankRadar system is the main part of the Saab Car go Contr ol system which includes the following optional features: • Car go control functions with Saab T ankRadar MaC • Ballast level gauging and draft gauging with the LevelDatic system • Overfill and high level alarm system with Omicr on [...]

12 Service Manual Third edition, June 1997 1.1 Radar Principle The radar transmitter on top of the tank emits micr owaves dir ected by an antenna towards the surface of the tank con- tent. The echo fr om the surface is picked up by the antenna again, and the dif ference in fr equency between the transmit- ted and the reflected signal is dir ectly p[...]

13 Service Manual Third edition, June 1997 2 General Inf ormation Note: If T ankRadar system needs to be switched off, check with officer in char ge that it is OK to interrupt the operation of the system. 2.1 Safety When connecting equipment in hazardous ar eas, certain requir ements must be fulfilled to provide pr otection against explosion . Ther[...]

14 Service Manual Third edition, June 1997 - Use only a certified battery operated multimeter . - Disconnection of live units in hazardous area is al- lowed. However , when r eplacing for example an Elec- tronic Box, it is r ecommended to disconnect its wiring in the safe area (in the Level Unit).[...]

15 Service Manual Third edition, June 1997 3 W ork Station Figur e 3-1 shows the Work Station. The W ork Station is operated with a light pen. With the light pen, the operator just points directly on the scr een to activate various functions. For input of, for example alarm limits, a keyboard is included. There is an on-line Help-function, pr ovidi[...]

16 Service Manual Third edition, June 1997 3.1 Description of the W ork Station’ s Cabinet Caution: Always turn the Work Station PC off befor e r emoving any cables at the back of the PC. Note: On the inside of the W ork Station there are parts that ar e sensitive to static electricity . Be careful not to expose any of the components inside to st[...]

17 Service Manual Third edition, June 1997 5. Connect all connectors (that wer e previously connected to the master) to the new master W ork Station. 6. Start the new master W ork Station. 7. Install pr ogram according to the instructions in chapter 3.6. During the installation, select this W ork Station as the master . 8. Install database accordin[...]

18 Service Manual Third edition, June 1997 3.5 Screen Settings of the W ork Station Monitor Ther e are a number of controls below the monitor ’s scr een. Whenever the pictur e on the screen looks distorted or incor - rect, changing the scr een settings may produce a better pic- tur e. See maker ’s manual (Hewlett-Packar d) in the Saab T ankRa- [...]

19 Service Manual Third edition, June 1997 3.7 The Service Windo ws of the W ork Station Software A number of the actions in the fault finding section at the end of this manual suggest operations done on the W ork Station. The Service functions are protected by passwor ds. The Cap- tain-password is requir ed when: - installing or backing up databas[...]

20 Service Manual Third edition, June 1997 Undo and Save. Any data that is changed in these windows is stor ed accor ding 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 pr ess the Save-button you cannot undo the entry (unless you e[...]

21 Service Manual Third edition, June 1997 Note : When setting the Level Unit into one-tank measurement mode, there is no measur ement on the other tanks. Select a new tank by hitting the T ank-button or by hitting the up or down arrow keys. The tank number is the internal number in the T ankRadar system and is useful when setting the addr esses on[...]

22 Service Manual Third edition, June 1997 • 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[...]

23 Service Manual Third edition, June 1997 • TX ID switch on is checked when the button on the Service Display is pr essed or when positions 4 and 30 on WT500 on the transmitter has been jumpered. • Corr plug inval is checked when the trim and list cor- rection of the ullage cannot be done or when the calcu- lation pr oduces erroneous results. [...]

24 Service Manual Third edition, June 1997 • 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, wher e Beam 1 is the lowest in the tank. These values are pr ogrammed by a Saab service engineer during the commissioning of the sys- tem. They should [...]

25 Service Manual Third edition, June 1997 refer ence point. There is no need to enter a value her e 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 of f, - 1 makes it show ullage continuously . - 2 makes it toggle between ullage, average temperatur e and ine[...]

26 Service Manual Third edition, June 1997 3.10 Le vel Unit – T emperatur e Data The T emperature Data-window shows the dynamic data and the database values for the temperatur e measurement. Select a new tank by hitting the T ank-button or by hitting the up or down arr ow keys. The dynamic data box shows: • Int temp . The internal temperatur e [...]

27 Service Manual Third edition, June 1997 • T emp 1, 2 or 3 in liq . This box is checked when this temperatur e 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 thr ee-wir e or four-wire [...]

28 Service Manual Third edition, June 1997 3.11 Le vel Unit – IG Pressur e Data The IG Pr essur e Data-window shows the dynamic data and the database values for the IG pr essur e measurement. Select a new tank by hitting the T ank-button or by hitting the up or down arr ow keys. The dynamic data box shows: • Pressure . The measur ed pressure. T[...]

29 Service Manual Third edition, June 1997 3.12 Le v el 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 T ank-button or by hitting the up or down arrow keys. The dynamic data box s[...]

30 Service Manual Third edition, June 1997 3.13 Le vel Unit – T rim/List Data The T rim/List Data-window shows the measured trim and list angles. They ar e displayed as 1/100 of degrees. The source of the trim and list values ar e shown in the Ship measur es-window in the Configure-part of the softwar e. Open the Ship measur es-window by hitting [...]

31 Service Manual Third edition, June 1997 • LU Orient. This shows in which dir ection the Level Unit cabinet has been placed on boar d. 0 - front of LU faces to port. 1 - front of LU faces starboar d. 2 - front of LU faces for e 3 - front of LU faces aft. Any changes of the database values must be followed by hitting the Save-button. 3.14 Le v e[...]

32 Service Manual Third edition, June 1997 • T est running . The LCM asks the LCS for a test signal which is pr ocessed 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 order ed [...]

33 Service Manual Third edition, June 1997 moving surfaces ar e measured more often. This func- tion can be useful if ther e ar e many tanks, and some of them have lar ge level rates when loading or discharg- ing. 3.15 Le v el Unit – LCI Status This window shows the status of the LCI. If you suspect that ther e is some problem with an LCM, this w[...]

34 Service Manual Third edition, June 1997 • 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 sec- onds this box becomes checked. See also chapter 3.14. A message will be displayed “Level Unit restarted”. The Active LCM box shows which[...]

35 Service Manual Third edition, June 1997 3.16 Le v el Unit – LI Status This window shows the individual status of up to four T rans- mitter Interfaces (LI). This window is useful when you are looking for a gr ound failur e. It is easy to detect which T ransmitter Interface (LI) that has gr ound failure. See also chapter 9.1.6 and 9.14. The stat[...]

36 Service Manual Third edition, June 1997 3.17 Le vel Unit – Backup and Local Displa y This window is used only when special units and special scalings have been programmed into the system at factory befor e delivery . A better way to change presentation units and change pr e- sentation of trim/list corr ection is in the Setup-window , opened fr[...]

37 Service Manual Third edition, June 1997 1 = Corr ection to the tank’s reference point (Plug) 2 = Corr ection 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 [...]

38 Service Manual Third edition, June 1997 3.18 Le vel Unit – LCI Com P orts Communication port 1 is usually used for the communica- tion with the W ork Station and port 2 is used for a Service PC. If ther e is any pr oblem with the communication between the Level Unit and the W ork Station, check that the values are: Pr otocol = 0 Baud = 19200 b[...]

39 Service Manual Third edition, June 1997 3.19 Le v el Unit – Relays In the status box in this window the status of the r elays in the Power Block of the Level Unit ar e 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 pressur e alarm relay will be activated whe[...]

40 Service Manual Third edition, June 1997 3.20 Le vel Unit – W ork Station Communication This window shows the load on the communication between the W ork Station and the Level Unit. It also shows if the communication is working by counting the number of trans- actions and r esponses. Y ou can r eset these counters by hitting the Reset counters-[...]

41 Service Manual Third edition, June 1997 3.21 Le v el Unit – Any Register In this window you can view any of the r egisters in the LCMs or the LCI. Ther e are two types of registers, the dy- namic registers and the database r egisters. Ther e are four buttons to select LCI or LCM and to select dynamic or data- base registers. Hit one of these b[...]

42 Service Manual Third edition, June 1997 Database r egisters can be changed. T ype in a new value and hit the Save-button. Note: Y ou must be sur e that you are changing the correct r egister , as many of the r egisters lack a descriptor . A list of a few of the database r egisters of the LCI is included below: Reg no . Name Description 00 Port_1[...]

43 Service Manual Third edition, June 1997 3.22 Le v el Unit – LCI, LCM V ersion In this window you can see the version of the pr ograms in the LCI and LCMs. Y ou can also see if one or two LCMs are used. This information can be useful if you need to contact Saab Marine Electr onics or a service agent.[...]

44 Service Manual Third edition, June 1997 3.23 Le vel Unit – Load Pro gram Hit the Service-button to open this window . This window can be used to load new pr ograms into the LCMs and LCI. The new pr ogram can be downloaded fr om a diskette. Note: Make sur e the new program is compatible with the Work Station softwar e. If unsure, please contact[...]

45 Service Manual Third edition, June 1997 3.24 Le v el Unit – Up/Do wnload 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 W ork Station to the LCMs and the LCI. It is also possible to upload database from these boar ds to the W ork S[...]

46 Service Manual Third edition, June 1997 3.25 Le vel Unit – TX Service The test functions for TX simulation and LCS simulation can be used if a tank has the TX Failur e check box marked. When setting the signal sour ce to TX Simulation, a tank signal will be sent fr om the T ransmitter to the Level Unit. The LCS Simulation generates a signal fr[...]

47 Service Manual Third edition, June 1997 If not even LCS Simulation gives a “distance”, the reason for fault is likely to be located on the LCS Boar d. 3.26 Le v el Unit – Scan T ank 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 S[...]

48 Service Manual Third edition, June 1997 3.28 Le vel Unit – IG Press Zer o Adjust Select this window when the IG pr essure sensors need to be adjusted. Select the tank that needs to be adjusted. Note: When the IG pressur e sensor is adjusted for zer o pressur e it is very important that the pressur e inside the tank is equal to the pr essure ou[...]

49 Service Manual Third edition, June 1997 3.29 Disconnect LU Use this function when there is a need to change the LU- database in the W ork Station when there is no communica- tion 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 displaye[...]

50 Service Manual Third edition, June 1997 The RS-485 Interface Boar d 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 communi- cation you want to view . The Communication Log-window shows the communication para[...]

51 Service Manual 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. Some- times detection of the output is easier if the Blink selection is set to 1. The output (for example r elay) will change[...]

52 Service Manual Third edition, June 1997 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 Pictur es Follow the instructions below if you need to install new or backup copies of pictur es and/or database on the W ork Station. If[...]

53 Service Manual 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 ar e normally placed in the dir ectory acu/tmp. 5. Or der the copying to start. 3.33 Service Log-Windo w Select Service Log fr om the Service-menu to open the Service Log-window . It is use[...]

54 Service Manual Third edition, June 1997 AMP Active A √ -sign indicates that the the AMP channel for echo amplitude exists. Check the box to create AMP channels if they are not active, then r estart the W ork Station. Log running Indicates that the log is r unning. Log stopped Indicates that the log is not r unning. Start/Stop Use this button t[...]

55 Service Manual Third edition, June 1997 4 I/O Bo x The I/O box is used to interface various equipment to the W ork Station including the Level Unit. The I/O Box is made up of a motherboar d with power supply , relays and connec- tors for seven Interface Boards. The I/O Box is connected either to an 8-channel serial inter - face boar d in the W o[...]

56 Service Manual Third edition, June 1997 4.1 The Motherboard of the I/O Bo x The motherboar d in the I/O Box contains a power supply , a communication watch dog with System Failure output, seven r elay outputs and seven slots for plug in of various Interface Boar ds. The seven serial channels are directly wir ed to the seven connectors for the In[...]

57 Service Manual Third edition, June 1997 4.1.2 Comm unication LEDs A green LED (H2) indicates r eceived data and a yellow LED (H3) indicates transmitted data. Received data is echoed back to the source. 4.1.3 P o w er LED The voltages on the motherboar d are monitored and are indicated by a gr een LED (H1). 4.1.4 Rela ys Ther e are eight relays f[...]

58 Service Manual Third edition, June 1997 Half duplex two-wir e transmission - S1-S4:1-2. Full duplex four wir e transmission - S1-S4:2-3. The connection of the Level Unit and LevelDatic system requir es half duplex, while the T ank Display Units require full duplex. Note : When tr ouble shooting you might need to exchange two RS 485 Interface Boa[...]

59 Service Manual Third edition, June 1997 5 Le v el Unit 5.1 Description of the Le vel Unit The Level Unit contains terminals for the intrinsically safe connection of the T ransmitters. It contains the electronics used for processing the signals fr om the T ransmitters, for calculating tank parameters, such as trim/list corr ected ullage, and for [...]

60 Service Manual Third edition, June 1997 1 0 F1 2A F2 1A F3 2A F4 2A F5 1A F6 2A NEMKO Nr Ex 94C346 (EEx ia)IIC SERVICE PC CONNECTOR F8-8A F7-2A (SERVICE POWER) SERVICE POWER S1 LP Power Block 9150 064-641 POWER SUPPLY 115 VAC 230 VAC F1-F6= LI Power Fuses. WARNING: Any substitution of components may impair intrinsic safety. See Service Manual. O[...]

61 Service Manual Third edition, June 1997 5.3 Restarting the Le vel Unit 1. Check with officer in char ge that it is OK to restart the system. A restart means ther e may be no information for a few minutes. 2. Open the front door of the Level Unit. 3. Switch the power of f by setting the power switch on the Power Block to position 0. 4. W ait unti[...]

62 Service Manual Third edition, June 1997 5.5 Signal Board, LCS The Signal Boar d contains analog filters and an A/D con- verter for the analog signal fr om the T ransmitters. 5.5.1 Replacing a LCS Note: In order to avoid ESD-damages (electrostatic dischar ge), do not touch the components or the pins in the connector at the back of the board. 1. S[...]

63 Service Manual Third edition, June 1997 5.7 Interface Boar d, LCI The Interface Board works as an interface between the Pr o- cessor Memory Boar d and the W ork Station. It also supports the Backup Display with its keyboard. If a service PC is connected, it communicates via this boar d. The Interface Board has five LEDs on the fr ont panel. The [...]

64 Service Manual Third edition, June 1997 5.7.2 Replacing the LCI Note: In order to avoid ESD-damages (electrostatic dischar ge), 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 fr ont panel of the board. Remove the four scr e[...]

65 Service Manual Third edition, June 1997 5.8 T rim/List Unit, L T 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 pr ocess that finds the true ullage. These values can also be used for ullage corr ection if there ar e no better s[...]

66 Service Manual Third edition, June 1997 5.8.2 Adjusting the T rim/List Unit 1. Measure the trim and list angles of the ship. A ship´s trim is the differ ence between the draft forward and draft aft. The trim-angle is defined as β in the figure. D A - D F tan β = L wher e: D A = draft aft, D F = draft for e, L = Length between scales. Note: Af[...]

67 Service Manual Third edition, June 1997 2. Switch the Level Unit on and r ead the trim and list values on the Backup Display . Press the System-key and select “1 T rimList” to see the values fr om source se- lected in Configure/Calculate/Shipdata. Check trim and list values on a W ork Station as well. 3. The T rim/List Unit can be adjusted i[...]

68 Service Manual Third edition, June 1997 5.9 Backup Displa y , LCB The Backup Display serves only as a backup for the W ork Station, for displaying the measur ed values and contents of the memory r egisters in the T ransmitters, Pr ocessor Memory Boar d and the Interface Board. The display can show each tank with its tank name and relevant tank v[...]

69 Service Manual Third edition, June 1997 Note: The level and level rate always based on the same unit. If one of them is changed, the other changes as well. T emp: 0 = degrees Celsius 1 = degrees Fahr enheit Pr ess: 0 = mbar 1 = PSI (pounds per square inch) 5.9.4 Local Displa y Frame Select Disp to change the display mode of the Local Display . E[...]

70 Service Manual Third edition, June 1997 5.9.7 Amplitude F rame This frame is used for viewing the amplitude of the tank signal. The frame shows three amplitude values at a time. 5.10 T ransmitter Interface , LI The T ransmitter Interfaces provide intrinsically safe power to the T ransmitters, temperature sensors, IG pr essure measure- ment and L[...]

71 Service Manual Third edition, June 1997 One T ransmitter Interface is connected to the Calculation Unit at the top of the Level Unit, while the other T ransmitter Interfaces ar e connected in serial with a flat cable between each one. 5.10.3 P o w er suppl y to the T ransmitter Interface The intrinsically safe parts of the T ransmitter Interface[...]

72 Service Manual Third edition, June 1997 - relays the digital signals between the T ransmitter and the Processor Memory Boar d and - stabilizes the intrinsically safe power supply and checks for ground failur e. 5.10.7 The Zener Bar rier Boar d (LIZ) The Zener Barrier Board has five separate cir cuits for the intrinsically safe connection of up t[...]

73 Service Manual Third edition, June 1997 5.10.10 Replacing a T ransmitter Interface (LI) 1. If it is a completely new LI, set addr ess switch on the new LI to same positions as on the r eplaced 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. Fi[...]

74 Service Manual Third edition, June 1997 on the label on the front of the Power Block since the switch is located inside it. 5. Mount the new Power Block. T ighten the four nuts. 6. Replace the cable connectors. 6 T ransmitters Ther e ar e two types of T ransmitters with dif ferent antennas available with the Saab T ankRadar: • Parabolic Antenn[...]

75 Service Manual Third edition, June 1997 Electronic Box IG pressure sensor (option) Cable inlet Protective hose (option) Insulation Stainless steel cone antenna Figur e 6-2. Cross-cut of the Cone Antenna. perature Connection Box may be deck mounted or pump mounted. Ther e is a wire terminal within the transmitter housing used for connection of th[...]

76 Service Manual Third edition, June 1997 Note: Make sur e the interior of the transmitter housing is com- pletely dry and clean befor e replacing the cover . Encased water or damp cause corr osion of the terminal block and wire leads causing contact fault. W ipe with a clean and dry cloth if necessary . Follow the steps below when r emoving the E[...]

77 Service Manual Third edition, June 1997 6.2 T ransmitter T est Cable In the spare parts set on boar d ther e is a T ransmitter T est Cable. Use this cable to check the function of the Electronic Box of the T ransmitter . Ther e is a distance printed on the T est Cable. It will differ from the ullage shown by T ankRadar when the T est Cable is ap[...]

78 Service Manual Third edition, June 1997 Check that the amplitude is within the shaded ar ea according to figur e 6-3. If it is not, exchange with new Electronic Box. 6.3 Cleaning the Antenna The only r egular maintenance requir ed is cleaning of the transmitter antenna. No general intervals can be stated, as cleaning intervals depend on the carr[...]

79 Service Manual Third edition, June 1997 6. Clean both sides of the antenna feeder in the same way . 7. Remove the br ush and the T eflon adapter , and replace the cleaning hole plug. 6.3.3 Cleaning b y Hand Befor e cleaning, the inert gas pressure must be reduced. Also observe local envir onmental, safety and health r egulations. 1. Open the cle[...]

80 Service Manual Third edition, June 1997 6.4 Iner t Gas Pr essure Sensor (Option) IG Pressure Sensor in Parabolic Antenna T ransmitter Figur e 6-6. The IG pr essure sensor in the Parabolic and the Cone Antennas. W ARNING! Closed tank condition can not be maintained when removing the gas pressure sensor . The tank atmospher e is exposed to deck en[...]

81 Service Manual Third edition, June 1997 Note: The sensor must be fitted to the vent hole by means of a Nylon hose. Note: Make a note of how the leads ar e connected to the wire terminal on the Electr onic Box before you disconnect the leads. 6.4.1 Cleaning the Inert Gas Pressure Sensor Follow the steps below when cleaning the IG pressur e sen- s[...]

82 Service Manual Third edition, June 1997 6.5 Dismounting of Antenna F eeder of the P arabolic Antenna The antenna feeder is mounted in the centr e of the trunk and its upper part is engaged in the Electr onic Box. Replacement can be carried out when the system is operating. Important! When r emoving the antenna feeder the tank must be opened. Per[...]

83 Service Manual Third edition, June 1997 pattern with a dynamometric wr ench. Then check the antenna feeder position once again. Readjust if neces- sary . The gasket settles down, so tighten the nuts to the torque shown above, again after two hours. 6. Install the Electronic Box. Note: Befor e replacing the transmitter cover , make sure the inter[...]

84 Service Manual Third edition, June 1997 When checking the r esistance of a Pt 100 sensor , observe the additional r esistance of the connecting leads, which can be either in a 3-wir e or 4-wire configuration. Note: For service of temperature sensors, strictly observe the safety r egulations for intrinsic safety , see chapter 2.1. Use a certified[...]

85 Service Manual Third edition, June 1997 7.2 Replacing a F aulty T emperature Sensor T o r eplace a faulty Pt 100 element, proceed as follows: 1. Remove the cover of the T emperatur e Connection Box. 2. Loosen the cap nut completely . 3. Loosen the adapter nipple using the box spanner fr om the spar e parts set. 4. Pull out the temperature sensor[...]

86 Service Manual Third edition, June 1997 8 T ank Displa y Unit (Option) 100 % 80 60 40 20 0 R COMMON ALARM M Ft Bargraph indicates percentage of full tank Press to display tank level with one LED point on the bargraph. Press again to change back to bargraph mode. Hi.Hi alarm indication Hi alarm indication Press to display Hi alarm limit on the nu[...]

87 Service Manual Third edition, June 1997 8 .2 Checking the T ank Displa y P o wer Supply Unit The Fl, F2 and F3 fuses (ratings 250 V/4 A) are located on a separate fuse panel. 1. Loosen the four scr ews to remove the cover . 2. Check if the fuses are intact. Replace if necessary . Also, reset the cir cuit breaker next to the transductor by pr ess[...]

88 Service Manual Third edition, June 1997 9 F ault Finding on the Saab T ankRadar System Whenever ther e are symptoms in the system that may indi- cate that ther e is some failure, please start the fault finding by looking at the following pages. Look for a similar symp- tom as the one your T ankRadar system is having, and then look for the cause [...]

89 Service Manual Third edition, June 1997 Contact fault between W ork 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 W ork Station faulty . • Check Service window “Communication I/O Box” on W ork Station. See chapter 3.30. The RS 485 Interface Board in loc[...]

90 Service Manual Third edition, June 1997 9.1.7 W arning messag e: Le v el Unit Memor y Failur e. LCM Boar d faulty . • Restart Level Unit and check Service-window LCM Status on W ork Station. If box “DF database loaded” is checked, memory in LCM Board is not working and LCM Board needs to be r eplaced. See chapter 3.14 and 5.6.1. • In Ser[...]

91 Service Manual Third edition, June 1997 9.1.11 W arning message: SIO X 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 failur e. ?[...]

92 Service Manual Third edition, June 1997 If ther e are more Slave W ork Stations, check for any messages on these. • If only one slave W ork Station has the message “NO CONT ACT WITH MASTER WORK ST A TION”, concentrate your fault finding on this W ork Station. • If all Slave W ork Stations have the message displayed, check Master W ork St[...]

93 Service Manual Third edition, June 1997 9.3.4 W arning “Clean antenna on tank XXX” If the signal strength is r educed 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 sho wn on W ork[...]

94 Service Manual Third edition, June 1997 9.4.2 W ork Station monitor image located incor r ectly , distor ted or discolor ed. Static field distorting the image. • Press the degauss-switch, see chapter 3.5. Image settings incorr ect. • Adjust image settings, see chapter 3.5. Some object is disturbing the magnetic field contr olling the image. [...]

95 Service Manual Third edition, June 1997 9.6 T ransmitters 9.6.1 Ulla g e indication not updated close to empty tank. T oo weak radar echo due to inclined bottom or sludge on tank bottom. • Ullage indication will be r esumed when the tank is loaded again. 9.7 Local Displa y 9.7.1 Local Displa y b lank Setting of display mode may be incorrect. ?[...]

96 Service Manual Third edition, June 1997 9.9.2 Indicated inert gas pressur e always the same IG pressur e sensor ’s opening to the tank may be clogged. • Clean the sensor ’s opening to the tank. See chapter 6.4. IG pressur e sensor faulty . • Replace sensor , see chapter 6.4. 9.10 T ank Displa y Unit 9.10.1 Display on TDU not working. No [...]

97 Service Manual Third edition, June 1997 9.12 Draft measurement 9.12.1 Draft measur ement incorrect Failure on LevelDatic equipment • Check LevelDatic equipment. See separate documentation in "As- built drawings and user's manual"-binder . Incorr ectly configured data for draft measurement. • Check that configur ed ship data in[...]

98 Service Manual Third edition, June 1997 9.14 Finding Cause of Ground Failur e W arning When the warning message “Level Unit Gr ound Failure” is displayed on the W ork Station or when the gr ound failure LED on a T ransmitter Interface in the Level Unit lights up, ther e is a need to find the cause of the ground failur e. The gr ound failure [...]

99 Service Manual Third edition, June 1997 7. If ther e is no ground failure on the cable between the T ransmitter and the temperature wir e terminal, you need to check each individual temperatur e sensor . 8. Remove the wires to the temperatur e sensor from the terminal inside the T emperatur e Connection Box. 9. Measur e the resistance between ea[...]

100 Service Manual Third edition, June 1997 17. If the resistance measur ed in step 16 is less than 10 M Ω , check the cable between the T ransmitter 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 he[...]

101 Service Manual Third edition, June 1997 T ankRadar reference point T ankRadar reference point Center of the T ransmitter deck socket 555 mm T ankRadar Reference Point Customer's Gasket. Approx. 4 mm Figure 9-1 shows the TankRadar reference point. 9.15 Comparing Ulla ges The best refer ence point for ullage measurement is the ullage plug on[...]

102 Service Manual Third edition, June 1997 Ther e ar e three different ways in which the T ankRadar can be configur ed as far as hand dipping and trim/list corrections are concerned. Depending on the configuration please follow the appr opriate steps below when comparing ullages. It is important to know which r eference point the system uses for c[...]

103 Service Manual Third edition, June 1997 10 Spar e P ar ts 10.1 Standard Spar e P ar ts Set, 9150065-981 P art no . Spar e Part Quantity 9150065-615 T ransmitter test cable G3 1 9150020-891 Cleaning br ush nylon for crude & products CRUDE&PRODUCT 1 9150020-893 Cleaning br ush stainless steel for chemicals CHEM 1 9150021-048 Box spanner f[...]

104 Service Manual Third edition, June 1997 11 Recycling of Saab T ankRadar At a point in time when your T ankRadar system has served you well for many years and it is time to scrap the ship, we at Saab Marine Electr onics are mor e than willing to help you with the r ecycling of the T ankRadar system. At our factory , we are able to sort out the v[...]

105 Service Manual Third edition, June 1997 12 Saab Marine Service Agents Australia NovaMarine Instruments Pty . Ltd. T el +61-49-69 44 77 Fax +61-49-62 12 10 Brazil Unitec Engenharia Ltda. T el +55-21-254 97 41, 204 05 36 Fax +55-21-264 71 62 China, PRC Shanghai Ship & Shipping Research Institute T el +86-21-888 58 422, 88 56 638-475 Fax +86-2[...]

106 Service Manual Third edition, June 1997 Spain Aries Industrial y Naval S A T el +34-1-533 92 00 Fax +34-1-554 95 94 Sweden Saab Marine Electr onics AB T el +46-31-37 03 35 Fax +46-31-25 30 22 The Netherlands ASEA Brown Boweri T el +31-10-407 88 67 Fax +31-10-456 86 87 United Arab Emirates Maritronics T el +971-4-34 22 1 1, 34 25 1 1 Fax +971-4-[...]

107 Service Manual Third edition, June 1997 Index A A/D converter ............................................ 63 Address T ransmitter Interface ............................ 72 Adjustment scales ...................................... 83 Alarm handling .......................................... 1 1 Amp_post_filt register ............................[...]

108 Service Manual Third edition, June 1997 Ground Failure .................................... 100 Replacing ................................................ 82 Zero pressur e calibration ..................... 82 Information flow ........................................ 61 Install database on W ork Station ............. 18 Install pictur es on W o[...]

109 Service Manual Third edition, June 1997 Registers, viewing ...................................... 41 Relays ................................................... 55, 74 Relays in I/O Box ...................................... 57 Relays in Level Unit .................................. 57 Relays-window .......................................... 39 [...]

110 Service Manual Third edition, June 1997 Replacing ................................................ 16 Replacing a board ................................. 17 Screen settings ....................................... 18 Service software .................................... 19 Sysfail and W arning Messages ............ 89 W ork Station Communication[...]