biffi气液联动执行器

E L B S - 10LINE BREAK DETECTION SYSTEMINSTRUCTION HANDBOOKMDE135E2REVISION LIST218/05/2002Fixed operating modeM.B. A.A.118/07/2000Update function of CN5-1 external powersupply ( pag.12 )M.B. A.A.018/01/2000Issue document M.B. A.A.Rev.DateDescriptionPreparedApprovedBIFFI ITALIA s.r.l.DIREZIONE, UFFICIO COMMERCIALE,,STABILIMENTO HEADQUARTER, SALES DEPARTMENT, FACTORY 29017 Fiorenzuola d'Arda (Piacenza) Italy Tel. (0523) 944411Telex 530107 -Bifior.ITelecopier (0523)941885CONTENTS1. FORWARD (1)2. WORKING PRINCIPLE (2)2.1. T ABLE OF OPERATING MODES (6)3. GENERAL CHARACTERISTICS (7)3.1. V ALVE CONTROL ON PRESSURE DROP RATE (7)3.2. V ALVE CONTROL ON HIGH OR LOW PRESSURE (7)3.3. V ALVE CONTROL FOR SIMULATION TEST (7)3.4. V ALVE CONTROL DELAY (7)3.5. L INE PRESSURE DATA ACQUISITION (7)3.6. S OLENOID VALVE CONTROL OUTPUT (8)3.7. P OWER SUPPLY PACK (8)3.8. L OCAL OPERATOR INTERFACE (8)3.9. L OCAL COMMUNICATION PORT (9)3.10. O UTPUT RELAYS (9)3.11. P RESSURE TRANSDUCER (9)3.13. E XAMPLE OF PRESSURE DROP RATE CONTROL (10)4. ELBS-10 ELECTRONIC CARDS (11)4.1 D IP-SWITCHES AND J UMPERS SETTING : (11)5. TECHNICAL CHARACTERISTICS OF ELBS-10 (12)6. ELECTRICAL CONNECTIONS OF ELBS-10 (12)6.1 V IEW OF E EX-D L INE B REAK C ABINET (14)7. MENU OF THE LOCAL OPERATOR INTERFACE OF ELBS-10 (15)7.1. P ARAMETERS AND SET-POINTS LIST (16)7.2. A LARMS AND WARNINGS LIST (17)7.3. P ARAMETERS LIST OF THE TEST FUNCTION (17)7.4. I NSTRUCTIONS FOR USING THE LOCAL OPERATOR INTERFACE (18)8. LIBVIEW.EXE PROGRAM (21)8.1. T O INSTALL THE LIBVIEW.EXE PROGRAM ON THE PC (21)8.2. T O CONFIGURE THE ELBS-10 L INE B REAK D ETECTION M ODULE (22)8.4. T O SAVE ALL THE EVENTS DATA OF THE ELBS-10 MODULE (24)8.5. T O VISUALISE THE ELBS-10 STATUS (24)9. MAIN COMPONENTS OF EEX-D LINE BREAK CABINET (25)10. TYPICAL ELECTRICAL DIAGRAM (26)11. TYPICAL OPERATING DIAGRAM (27)12. START - UP INSTRUCTIONS (28)13. TO RESTORE THE VALVE CONTROL FUNCTION (29)14. BATTERY MAINTENANCE (29)1.FORWARDThe Line Break Detection System type ELBS-10 is an electronic equipment, developed by Biffi,for monitoring the pipeline integrity. The ELBS-10 continuously monitors the pressure in the line and in case of failure, it sends a command to the actuator so as to stroke the line valve to the fail safe position. The electrical power necessary for working, is supplied by a 7.2V lithium battery pack that allows the ELBS-10 to work for at least one year.The ELBS-10 is provided with a powerful local operator interface, made of one 2 lines / 16characters LCD display and 3 push-buttons, that allows to enter the configuration data and to visualise the values of variables or the status of the device. Moreover an RS232 serial communication port is provided for connection to a PC or LAP TOP, to carry out parameter configuration, or variables visualisation or to down-load the recorded event data for further analysis of pipeline behaviour .The ELBS 10 was especially engineered for “ON FIELD” service, it means capability of working in the severest ambient conditions, as wide operating temperature range, vibrations, explosive atmosphere, etc. Particular care was taken to increase the level of immunity against the radio frequency disturbs.2.WORKING PRINCIPLEThe ELBS-10 samples cyclically the line pressure value, measured by the pressure transducer (PT) and memorises the sampled values in a temporary rolling memory, type FIFO (First in, First out). The rolling FIFO memory allows to store 256 samples and the sampling rate is programmable from 1 to 10 s.The pressure magnitude and pressure drop rate are continuously compared to the reference values, set by the user in the configuration memory.An event is defined as the condition that occurs when the measured pressure magnitude or pressure drop rate exceeds the customer set-point for a configurable time.In case of event, the pressure magnitude values, present in the FIFO memory and relevant to 88 samples preceding the event and 168 samples after the event, are transferred to the “data memory”. Only one sample out of four is stored in the event data memory. So each event is recorded in the event data memory by 64 samples(22 samples preceding the event and 42 after the event).The event data memory can store up to 1000 events.The following drawing shows the block diagram of the ELBS-10:The ELBS-10 transfers into the “event data memory” the following type of EVENTS: EVENT 1- pressure value decreases of a pre-set amount (field configurable )EVENT 2- pressure reaches the low value limit (field configurable)EVENT 3- pressure value increases of a pre-set amount (field configurable)EVENT 4-pressure reaches the high value limit (field configurable)EVENT 5- (only in ACQ mode) pressure drop exceeds the pre-set speed dropdata acquisition (field configurable)EVENT 6- pressure drop exceeds the pre-set speed drop valve control (field configurable) The following configurable operating mode are available:•data acquisition•valve control•sleepIn data acquisition operating mode the pressure samples relevant to an event (1,2,3,4,5) are stored in the data memory but an event does not affect the valve position.In valve control operating mode the pressure samples relevant to an event (1,2,3,4,6) are not stored in the data memory but EVENTS 2 ,4 and 6, cause the valve to stroke to the fail-safe position.The two operating mode can be used separately or simultaneously. In valve control + acquisition mode (ACQ+VC ), in case of pressure drop only EVENT 6, EVENT 1, 2,3,4 are recorded, while EVENT 5 is not recorded.The sleep operating mode is used to inhibit both data acquisition and valve control operating modes to puts out of service the ELBS-10.In case of alarm or if valve control mode is chosen but the solenoid valve control is ‘’not armed‘’, automatically, the ELBS-10 enters in the ‘’ slow sampling ‘’ state. In the above state the valve control and acquisition functions are off, but the ELBS-10 restores to normal operation when the cause disappears.The following figure shows the ‘’ data acquisition area ‘’ in function of the time.The below figure shows the above described types of EVENT that could be memorised during one year of pipeline data acquisition.The Event 1, happened in January, represents a pressure that pass through the values of 30 bar and 25 bar, causing the memorisation of the events in the “event data memory” ( Event 1.1 & Event1.2).In February, April, May, July September and November the pipeline pressure does not generates any Event. The Event 3 represents a pump station start-up, while the Event 5 is a pump station shut down that creates a pressure drop rate higher than the ELBS-10 adjustment, so that the Event 5.1,5.2, 5.3 and 5.4 are memorised into the “event data memory ’’. The Event 6 represents a Line Break that creates a pressure drop rate higher than the pipeline curve behaviour present in the ELBS-10memory. In this case the actuator is controlled in order to stroke the pipeline valve in the fail position.Pressure behaviour relevant to one year51015202530354045505560657075Pressure (bar)All the Events are memorised in the “event data memory”. The following formula allows to calculate the duration of the recorded time corresponding to each event and the time between two recorded pressure data in each event:recorded time duration ( min. ) = sampling rate * 256 / 60 time between 2 data ( sec. ) = sampling rate * 4For example with sampling rate at 8 sec. the time duration of the recorded data is 8*256/60 = 34.1min, and the time between two recorded pressure data is 8*4 = 32 sec.When the “event data memory” reaches 90% of its capability an alarm informs about the need to discharge the memory content in a portable PC in order to allow the ELBS-10 to restart its pipeline survey.The content of the “event data memory” can be used to build-up the pipeline pressure curve relevant to one year of survey, as shown in the below figure.The pressure curve allows to calculate the typical values of pressure and pressure drop rate of the pipeline and to enter the correct set-points in the ELBS-10 .Pressure curve obtained after one year of survey5Pressure (Bar)September2.1. Table of operating modesOperating mode DescriptionValve Control ( V C ) (configurable)No data acquisition, only valve control in case of EVENTS 2,4, 6.Valve control mode is active only if ‘’Solenoid valve control’’ is ‘’armed‘’. The ELBS-10 switches to slow sampling mode if :- solenoid valve control is not armed.- if there is an alarm.- after the valve control.Acquisition ( ACQ ) (configurable)Valve control not active.No valve control, only data acquisition on EVENTS 1, 2, 3 , 4, 5. The ELBS-10 switches to slow sampling mode if :- the event data memory is full and ‘’ not circular mode ‘’ is set. - if there is an alarm.- in case of low pressure (EVENT 2).- in case of high pressure (EVENT 4).Valve Control + Acquisition ( V C + ACQ ) (configurable)Valve control on EVENTS 2, 4, 6, and data acquisition on EVENTS 1, 2, 3, 4, 6.Valve control + Acquisition is active only if ‘’Solenoid valve control’’ is ‘’armed’’.The ELBS-10 switches to slow sampling mode if :- solenoid valve control is not armed.- if there is an alarm.- after the valve control.If event data memory is full and ‘’ not circular mode ‘’ is set, the data acquisition stops, but valve control is still active.Sleep ( SLEEP ) (configurable)No data acquisition and valve control.No pressure and voltage measurement.The local operator interface is still available.Slow sampling ( SLOW ) (automatic, not configurable)No data acquisition and valve control.The local operator interface is still available.The ELBS-10 measures the voltage supply and the pressure with a time equal to ‘’slow sampling rate’’ (see: parameters and set-points list). The ELBS-10 display show ' SLOW' The ELBS-10 restores to normal operation when the cause disappears.3.GENERAL CHARACTERISTICS3.1.Valve control on pressure drop rateWhen the pressure drop rate exceeds the drop rate set-point(EVENT 6), the ELBS-10 sends an electric command to the solenoid valve and the actuator stroke the line valve to the fail position.3.2.Valve control on high or low pressureThe ELBS-10 sends an electrical signal to the solenoid valve in order to stroke the line valve to the fail safe position when the pressure value is lower than the low pressure set-point ( EVENT 2 ), or is higher than the high pressure set-point ( EVENT 4).3.3.Valve control for simulation testThe ELBS-10 is fitted with an hardware/software module that allows to enter a pressure drop rate in place of the pressure transducer values, in order to verify the output command signal to the solenoid valve and the correct operation of the device.The test function force the valve control (VC) mode . The simulated pressure will start to the high pressure limit and goes to 0 bar. The test function can be stopped by the ENTER push button. If the ELBS-10 will close the pipeline valve the event will not be recorded.3.4.Valve control delayThe ELBS-10 is fitted with a configurable time delay module that allows to delay the solenoid valve command. If the condition which causes the event (low pressure EVENT 2, high pressure EVENT 4, pressure drop rate EVENT 6), disappears during the delay time, the valve control signal will not be generated .3.5.Line pressure data acquisitionThe ELBS-10 temporary rolling memory (FIFO) is continuously recording 256 samples. When an event occurs, the FIFO memory data are stored, one out of four, in the event data memory. The event data memory capacity is of 1000 events. The following set-point are used : low pressure set-point (EVENT 2), high pressure set-point (EVENT 4), drop rate set-point in valve control mode (EVENT 6), pressure drop rate set-point in acquisition mode (EVENT 5), pressure increases of pre-set amount (EVENT 3), pressure decreases of pre-set amount (EVENT 1).When more events occur during the data acquisition, the relevant event record will be marked whit the code of the first one.The data relevant to the events can be visualised by local operator interface or by PC via RS232 serial line. By PC, the user can built-up the line pressure behaviour.3.6.Solenoid valve control outputThe ELBS-10 is provided with a 24Vcc/100mA output electric signal and one change-over dry contacts of a relay, suitable to drive the solenoid valve of the actuator.A timer module allows to set the duration of the solenoid valve control (solenoid control duration ).The output is active if the ELBS-10 operating mode is valve control (VC ) or valve control +acquisition (VC+ACQ ) and ‘’solenoid valve control ’’ is armed .3.7.Power supply packIn this case the ELBS-10 is fitted with a battery pack with 4 x 3.6V Lithium Thionyl Chloride, size D. The battery pack is installed in an explosion proof enclosure. The battery service life depends on the sampling rate. By selecting 8 sec. as sampling rate the minimum battery life is 1 year. A battery life survey function generates a Warning signal when the next change of battery is necessary ( see next maintenance on tab. 7.1).3.8.Local operator interfaceThe ELBS-10 is fitted with a 2 lines / 16 characters LCD display and 3 push-buttons that allows to enter the configuration parameters or to visualise the working data.Two push-buttons 'DEC', 'INC' are used to move into the menu, while the third 'ENTER' is used to enter the selected information.To visualise the messages of the display, the operator can choose between two available languages (English or Italian). The following operations can be done:• to visualise the:-event data memory content -pipeline present pressure value -line valve control set-points -data acquisition set-points -battery voltage value-status and alarm of the ELBS-10The configuration operation are protected by password . The operator can enter in the configuration menu and change the parameters or arm the solenoid valve control output, only after entering the appropriate password . The ELBS-10 is supplied by BIFFI with the default password ‘’ 0000 ‘’. The customer can enter its own secret password of 4 alpha-numerical characters. When the newpassword is entered, the default one is no longer valid.3.9.Local communication portThe ELBS-10 when is connected via RS232 to a portable computer it is possible to control and program all relevant parameters. The following operations can be done:•to visualise the:-event data memory content-pipeline present pressure value-line valve control set-points-data acquisition set-points-battery voltage value-status and alarm of ELBS-103.10.Output relaysOne output relay with change-over, dry contacts is available for remote signalling of alarm of ELBS-10. In alarm the ELBS-10 stops working. (see: alarm and warning table ).One output relay with change-over, dry contacts is available for remote signalling of warning of ELBS-10. In warning all functions of the ELBS-10 are available, but some parameter or variable is not correct (see alarm/ warning table).One output relay with change-over, dry contacts is available for remote signalling of solenoid valve control not armed. When the status of the relay indicates ‘’armed’’, the ELBS-10 is ready to control the valve if the pressure is lower than the set-point, or the pressure is higher than the set-point or the pressure drop rate exceeds the set-point (EVENTS 2,4,6), when one of this events is detect the ELBS-10 command the line valve to fail position and switch this relay. After valve control the relay remains in the status ‘’not armed ‘’. This relay will be reset when the ELBS-10 is re-ARMED. (see : how to arm solenoid valve control par.).3.11.Pressure transducerThe pressure transducer is supplied with the ELBS-10 and is installed on the line valve at valve maker / customer care, according to Biffi instructions.The pressure transmitter must be installed downstream the line valve and converts the pipeline pressure 0-100 bar to a0-20mA electrical signal.3.13. Example of pressure drop rate controlThe following figure shows the ELBS-10 behaviour in presence of a continuous pressure drop rate.Note : Before than the valve control action takes place, it needs that the EVENT 6 condition is confirmed for the “confirmation time” and the pressure decreases during the “delay” time.The following figure shows the ELBS-10 behaviour in presence of a temporary pressure drop rate.4.ELBS-10 ELECTRONIC CARDSThe ELBS-10 consists of two electronic card ( mother board and display board). On the mother board are located the microprocessor, the A/D converter, the memories, the power supply stage and the input / output modules. On the display board are located the LCD display, the circuit necessary to control the 3 push buttons of the local operator interface and the RS 232 connector. Thefollowing figure shows the ELBS-10 electronic cards .4.1 Dip-switches and Jumpers setting :Factory default :SW1 -1= off, SW1 -2= offJ1 = open, J2 = open, J3 = 2-3 close, J5 = open, J6 =close5.TECHNICAL CHARACTERISTICS OF ELBS-10Application:gas / liquidsAmbient temperature: -20° / + 70° CWorking pressure: from 0 to 300 barPressure drop rate:from 0.2 to 20 bar / minPressure sampling rate:from 1 to 99 sec. adjustableData memory capacity:1000 eventsValve stroke delay:from 0 to 999 sec.Valve stroke duration:from 0 to 255 sec.High/low pressure set-points from 0 to 300 bar.Battery voltage:4x3.6V,size D,Lithium Thionyl Chloride.Pressure transmitter supply: 12V / 20 mASolenoid valve control output:24V / 100mAPC connection:via opto-coupled RS 232 serial port.6.ELECTRICAL CONNECTIONS OF ELBS-10The following figure shows the terminals of the ELBS-10 electronic cardsThe following figure shows the layout of the line break protection system6.1View of Eex-d Line Break Cabinet .7.1.Parameters and set-points listDISPLAY MESSAGE DESCRIPTION ENG.UNITRANGE ACTUALVALUENEWVALUEHIGH PRESSUREXXX.X BARHigh pressure limit ( EVENT 4 )integer0-300.093.0LOW PRESSUREXXX.X BARLow pressure limit ( EVENT 2 )integer0-300.032.0VALVE CONTROL BAR / MIN XX.X Pressure drop rate in VC valve controlmode and in ACQ+VC mode ( EVENT 6 )bar/min0.2-20 3.0ACQUISITIONBAR / MIN. XX.X Pressure drop rate in ACQ acquisition mode( EVENT 5 )see par.2bar/min0.2-2020.0PRESSURE INC.XX.X BARPressure change in increase ( EVENT 3 )bar0.2-99.9 5.0PRESSURE DEC.XX.X BARPressure change in decrease ( EVENT 1 )bar0.2-99.9 5.0DELAYXXX SECDelay of the valve stroking sec0-99910DURATIONXX SECDuration of the valve stroking sec0-25530SAMPLING RATEXXX SECSampling rate sec1-2558TIMEhh:mm:ss Time hh-mm-ss00-00-0023-59-59actualDATEdd-mm-yyyy Date dd-mm-yyyy01-01-199031-12-2099actualOPERATING MODE ACQ + VC Operating mode: SLEEP, ACQ uisition, V alveC ontrol, ACQ uisition and V alve C ontrolinteger SLEEP,ACQ,VC, ACQ+VCVCSLOW SAMPLING RATE XXX SEC.Slow sampling rate: sampling rate aftervalve stroking or in alarm statussec1-25532MEMORY MODECIRCULAR Event memory mode: circular / not circular(note 1)boolean circ/notcirccircularALARM 90 % ON Alarm when the event memory contentreaches 90% : ON / OFFboolean on/off offOFF VOLTAGE X.X V Low voltage limit. Alarm when the supplyvoltage fall down the above value.V0-10 5.3ON VOLTAGE X.X V Off to on supply voltage. Min. voltageneeded to restore correct operationV0-10 6.1TRASMITTER0mA XXX BARPressure Transducer Zero bar0-3000TRASMITTER20mA XXX BARPressure Transducer Span bar0-300100LAST MAINT. dd-mm-yyyy Date of the last battery change dd-mm-yyyy01-01-199031-12-209915-12-1999NEXT MAINT. dd-mm-yyyy Date of the next battery change dd-mm-yyyy01-01-199031-12-209918-6-2000SERIAL NUMBER XXXXXXXXXXXX Serial number alpha-num charmax 12charELBS10-03-01,,5Note 1. Circular = when the event memory is full the new event takes the place of the oldest (the first) . The next one will take the place of the second , etc.Not circular = when the memory is full the acquisition function stops working. The ‘’ clear memory ‘’ control restarts the acquisition function. Valve control function remains active.7.2.Alarms and warnings listDISPLAY MESSAGE ALARM / WARNINGRESETDESCRIPTIONMEMORY ERRORA No error in CRCmemoryAlarm ( A )due to error in checking the CRC of the EEPROMmemoryMEMORY 90 %W CLEAR memorycontrolWarning ( W )generated when the EEPROM memory reaches 90% ofits capacity and if the relevant parameter is set to on.TRANSMITTERA Transmittersignal < 20 mAAlarm ( A )generated when the signal of the pressuretransmitter is > 20.5 mA or the relevant A/D converter isblockedHIGH VOLTAGEA Voltage value <10 VAlarm ( A )generated when the voltage supply is > 10 VLOW VOLTAGEA Voltage value >"on voltage"Alarm ( A )generated when the supply voltage is lower than therelevant configured parameter( OFF VOLTAGE )TEMPERATUREW Temperature valuecorrectWarning ( W )generated when the temperature is higher than+75°C or lower than -20°CSLEEPA ACQ or VCoperating modeAlarm ( A )generated when " SLEEP " operating mode selected.MAINTENANCEW Next maint. date> present dateWarning ( W )generated if present date is > than the configured" NEXT MAINT.dd-mm-yyyy " (see parameters and set-point list)7.3.Parameters list of the test functionDISPLAYMESSAGEDESCRIPTIONPRESSURE DROPXX.X BAR / MINPressure drop value used by the test function.START TEST START of the test functionNote 1: the test function causes the valve control also if the data acquisition mode is configured. The test execution can be interrupted by pushing 'ENTER' ( or by pushing simultaneously 'DEC' and 'INC' ) of the local operator interface .See also par. 3.3 and how to launch test function.7.4.Instructions for using the local operator interface8.LIBVIEW.exe PROGRAMThe communication between ELBS-10, line break detection module, and PC is done via RS232digital serial line. The program LIBVIEW.exe, to be installed on the PC, runs under WINDOWS 95operating system is supplied as an option. The program LIBVIEW.exe allows the following :• to visualise the event data memory content, present pressure value, date, voltage supply value,set-points and all internal parameters• to configure the set-points and the internal parametersThe following diagram shows the electrical diagram of the cable for connecting the PC to ELBS-10.8.1.To install the LIBVIEW.exe program on the PCInsert the diskette in the floppy disk driver A and then proceed as follows:• Click on START. Click on RUN. Digit the name of the program: A:\Setup.exe . Click on OK and then follow the instructions on the screen of the computer • Double click on the icon LIBVIEW to open the program Alternatively:• Create a new directory in C:• Copy Libview.exe in the new directory • Run the program Libview.exeClick on ‘’Option’’ to select the communication port8.2.To configure the ELBS-10 Line Break Detection Module Click on LIBVIEW icon Click on ‘’configuration’’Click on ‘’OBJECT LIST’’Click on the ‘’ ‘’ to see the variable list Click on the variable name that will be configured Click on ‘’READ’’ to see the present value Click on the value and introduce the new one Click on ‘’WRITE’’Click on ‘’READ’’ to check that the new value has been entered8.3.To visualise the event data of the ELBS-10 moduleClick on LIBVIEW icon Click on ‘’configuration’’Click on ‘’events data’’Click on the ‘’ ‘’ to see the events list Click on the event number.Click on ‘’READ’’ to see the event data on the screenClick on ‘’CLEAR ALL EVENTS’’ to clear the event memory of the ELBS-10to exit:Click on ‘’Cancel’’Click on ‘’File’’Click on ‘’Exit’’To save the single event on disk :Click on ‘’File’’Click on ‘’save’’8.4.To save all the events data of the ELBS-10 module Click on ‘’configuration’’Click on ‘’events data’’To save all the events on disk :Click on ‘’File’’Click on ‘’Download’’8.5.To visualise the ELBS-10 statusClick on ‘’configuration’’Click on ‘’read I / O’’Click on ‘’ X ‘’Click on ‘’File’’Click on ‘’Exit’’9.Main Components of Eex-d Line Break cabinet - Some internal views of Eex-d cabinet :12.START - UP INSTRUCTIONSdiagram.The 4 batteries are supplied separately , sothe first of all it needs to install the batteriesin the actuator enclosure. Proceed asfollows:-open the actuator battery pack enclosure and put the batteries inside the battery holders. Be careful at the battery polarity, since the reversed polarity causes fast batteries discharge. See the drawing, in battery maintenance paragraph, to correctly install the batteries.-by a multimeter measure the voltage on the terminals ‘’ + ‘’and ‘’ - ‘’. The voltage should be about 7.2Volt.-press the push-button ' ↵ ' to wake-up the display.-enter the desired operating mode, VC valve control, ACQ data acquisition, or VC+ACQ valve control + data acquisition ( see: How to leave the ‘’ SLEEP ‘’ status procedure ) and then enter the desired values of set-points and parameters (see: Parameters and set-point list and relevant procedures). The default password is ‘’ 0000 ‘’.-enter present TIME, and DATE. Enter LAST MAINT = present date-enter NEXT MAINT = present date + 1 year (with Lithium batteries)to set the date of the warning signal and maintenance request.-use the local operator interface to check that all parameters and set-points are in the correct range. -use the local operator interface to check the pressure value, the alarm / warning list, the voltage and temperature values (see: step 0 of the menu ). If there is any alarm or warning, use the display messages to find-out the cause of the malfunction.- if everything is correct and valve control operating mode is configured , launch the test function (see relevant procedure). At the end of the test open the valve. BE CAREFUL, the test function can causes the actuator to close the valve, so do not perform the test function if valve closure is not allowed.- if the valve is open and if valve control operating mode is selected , arm the solenoid valvecontrol output (see: How to arm the solenoid valve control procedure ).-Wait until the display switches off .18-05-022913.TO RESTORE THE VALVE CONTROL FUNCTIONIn valve control operating mode (VC) and after a solenoid valve control due to EVENTS 2, 4 , or 6, the ELBS-10 close the pipeline valve and enters in the ‘’slow sampling state’’ and the pipeline survey functions are inhibited. To re-open the valve and restore the survey functions it needs to re-arm the solenoid valve control as follows:-re-arm the valve 681 (pneumatic pilot / hand return valve) see operating diagram-open the pipeline valve-see ‘’ Instructions for using the local operator interface : how to arm the solenoid valve control’’.14.BATTERY MAINTENANCETo change battery pack proceed as follows:-use the local operator interface to put the ELBS-10 in solenoid valve control output ‘’not armed’’ (see: How to arm the solenoid valve control output) and then in SLEEP mode (see:How to enter the SLEEP status).-open the actuator battery pack enclosure.-put the new battery inside the battery holders. Be careful at the battery polarity, since the reversedpolarity causes fast batteries discharge. See thebelow drawing to correctly install the batteries.-by a multimeter measure the voltage on the terminals ‘’ + ‘’and ‘’ - ‘’. The voltage should be about7.2Volt.’’ to restart with line survey operations.。