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CIS Training Manual – DA Meter Version

1. accent gt Save p TES l D C P None igh Survey Walking Direction easing Cancel E Tep 9 20 AM ral For the above screen the pull down list arrow button in the Survey field was tapped to reveal the 4 choices for the push buttons on the pair of canes to be used in the Trigger CIS the left cane held in the left hand with the left thumb operating the left cane button and the right cane held in the right hand with the right thumb operating the right cane button Manual Triggering of Readings The left and right cane buttons can both be selected to read voltages read read meaning that as the operator walks down the pipeline alternately contacting the soil with the left and right canes a voltage recording will be made when either cane is triggered Alternatively one of 20 the canes can be selected to read voltages while the other is selected to register the location of a survey flag survey flags are typically located every 100 feet down the length of a pipeline This would be the flag read or read flag choice In this case the push button on the cane selected to register flags would only be pressed at each survey flag location Finally the flag flag choice can be selected and in this case both canes would only be used to register survey flags Pressing the push button on the read designated cane or pressing the cane button on the flag designated cane has the same affect as tapping the read bu
2. The objective of this step is to excavate dig at least in those areas identified using the complementary steps above steps 1 and 2 and by direct inspection to measure the extent of corrosion in those areas Typically wall thickness is measured and other corrosion related data are collected in this step Step 4 Post Assessment The objective of this step is to prioritize the repair schedule and to decide on the mitigation approaches to be used based on the results obtained in Step 3 The period of time before the next integrity evaluation is to be undertaken is also decided in this step for each ECDA Region The subject of this Training Manual is a measurement process that is applied in Step 2 of the ECDA evaluation process ie in the Indirect Inspection Step The measurement process is known as a close interval potential survey CIPS or CIS the details of which are discussed below I 3 CIS Overview With regard to Indirect Inspection of a buried pipeline one major technique that is employed is a close interval potential survey CIS which involves performing above the ground measurements of pipe to soil potential voltage along the entire length of the pipeline In a CIS it is critical that measurements be made in a highly consistent fashion from individual technician to individual technician and data pipe to soil potentials be recorded and analyzed in a consistent fashion in order that such data can be considere
3. 24 In the case where a pipeline is cathodically protected via an impressed current current flow to the pipe from a sacrificial anode driven by an external DC voltage source the rectifier DC voltage source is typically always ON so that the line is continuously protected However with current flowing in the soil to the pipe the pipe to soil voltages being measured during a CIS will include any voltage drop IR drop occurring in the soil itself If a large amount of current is flowing in the soil and or the soil has a high resistivity the magnitude of the voltage drop IR drop could be significant Consequently it is important to measure the actual pipe to soil potential voltage with no current flowing in the soil with a view to establishing that the pipe is at a sufficiently negative potential at least 0 85 Volts with respect to copper sulphate reference electrodes The problem is that the rectifiers DC voltage sources cannot be switched OFF for the duration of CIS measurements since the pipeline would lose its cathodic protection while the CIS measurements were being performed The solution to this problem is to only interrupt the current flow for very short periods of time typically less than a second and to be able to record the pipe to soil voltages with respect to the reference electrode during the current OFF periods If pipe to soil voltages are also recorded during the current ON periods t
4. As can be seen from the above window a graphical representation of the survey data is extremely useful with regard to immediately identifying potential problem areas Excel Spreadsheet Option Another option exists at this point particularly if you do not plan to bring the survey data into the Database Management Section of ProActive and that is to export the survey back out of the Driver in the form of spreadsheets This can be done by clicking on the Export to Excel button on the DA Meter Driver window and selecting the Exported Surveys folder in the Save As window 75 Remember that you previously setup an Exported Surveys folder on your hard drive By accessing your Exported Surveys folder you can view the survey information survey readings and DCP Features data in spreadsheet form At this point in the process having examined your survey data you can decide whether or not to bring the data into the Database Management Section of ProActive where the survey can be integrated with any other surveys you might have in your ProActive Database After importation you can manage the data associated with all of your surveys in a whole host of ways inside ProActive The data management functions available within ProActive are beyond the scope of this particular manual however you are referred to our ProActive Training Manual for specific information 76 Appendix 1 How to Connect the Chai
5. Cornpact Flash DAMeter_DATA ns ns mem i men date time system data ak 5 6 05 10 00 38 AM cet once diring initial Previous Di 10 01AM E pigDAMeter_ PLS Step 25 Provide the Work Order Number for the CIS By tapping once in the field labeled Work Order you can type in the work order number for the CIS if appropriate 37 Step 26 Provide Your Name By tapping once in the field labeled Technician Name you can type in your name Step 27 Provide Comments By tapping once in the field labeled Comments Description you can enter any comments you might have regarding the survey perhaps weather conditions soil conditions etc Also shown on the Setup 4 of 5 screen are the File Name and the date time Note Do not attempt to change the File Name indicated here as this identification will be required by the ProActive software to transfer your CIS data to your PC or server Step 28 Make Voltmeter Read Mode Selection Tap once on the Next button on the Setup 4 of 5 screen The Setup 5 of 5 screen will appear as shown below Survey Survey Options Help nj Setup 5 of 5 Voltmeter Setting Read Made Range 5 7 Y BC 400 MOhm Astat peeDaMeter_PLE eo o 17 Pm A 38 The above screen is used to establish the mode in which the digital voltmeter will be operating during the CIS measurements Remember the data being logged by the DA Meter ar
6. The important features on this section of pipe are as follows TS1 Test Station 1 Coincides with station 0 00 0 reference zero station Flags Located at 1 00 0 100 feet from reference zero station 2 00 0 200 feet from reference zero station and 3 00 0 300 feet from reference zero station TS2 Test Station 2 located at 2 40 0 240 feet from reference zero station Asphalt Road A 20 feet wide asphalt road located b w 2 70 0 and 2 90 0 270 feet from reference zero to 290 feet from reference zero Valve Located at 3 50 0 350 feet from reference zero station 55 Since in our example we have set up the right hand cane to be the read cane voltages will be recorded each time you trigger the right hand cane s push button by pressing down on the button as you walk down the length of the pipeline Triggering a recording using the right hand cane button in this case would have the same effect as tapping on the Read button on the above screen Since you recorded voltages at the starting test station TS1 in Figure 6 you have already established a Device location and as shown below this device is identified in the graph on the survey screen by the letter D In fact all Devices encountered as you go down the length of the survey section will be marked on the graph in this fashion Please note however that this first D marker will disappear from the graph as soon as the first survey
7. the battery pack and back up battery were fully discharged you would need to re install the DA Meter s software application package see the DA Meter User s Manual Since your survey files are stored on the CompactFlash card you will have to access this memory in order to delete selected survey files The procedure would be as follows e Double tap on the My Handheld PC icon e Double tap on Compact Flash e Double tap on dameter_ data e Tap once on the Survey File you wish to delete e Tap once on the Delete button y symbol on menu bar 85
8. 98 06539 75 360 75 350 75 350 70 209 69 028 70 144 71 587 71 587 71 522 72 375 72 375 72 375 72 375 72 375 00002 22 Custom 1 aooaa t 3T TIIN 2696459 98 06545 71 1281 Fence anon i 26896460 98 08575 75 492 Line Merker 0000 i 2696460 38 06575 75 492 Custom2 0000 ENTER VAL 26 96460 99 06575 75 492 Rocky 000 2696460 98 06575 75 492 PigTrap 0000 i 759646 98 06585 77 155 Reconrect F 1 1502 THIS I5 WHIZA 96461 38 06555 77 155 0000082 Valve Stuctu 1 1345 f 2696461 99 06595 77 1 Bs v Any Devices or Geo Features that were registered on the survey will be listed in this window as well as any associated comments that were entered on the DA Meter and GPS position data if recorded at these locations Any voltage readings recorded at Devices will also be presented here Finally by clicking on the Graph tab the window shown below is displayed 74 EE DA Meter Driver Pipeline Survey Download Survey Info Readiras Device Readings PLS Graph Redline Features 7 D v c gt 10 00 Station 422 2004 12 23 34 PM The above window shows a graphical representation of the survey data for this example survey As can be seen both the high voltage and the low voltage readings are shown together in graphical form the red line represents the high voltage readings and the green line represents the low voltage readings in the above case
9. If Trigger CIS mode was selected for example the screens shown below will appear for the non metric and the metric cases Survey Survey Options Help w A fo Flag Dist Error Limit 120 y Name of P L Dist Per Reading 12 5 ft Valve ne Distance Between Flacs ft Number of Data Probes Starting Location Auto Pacing Mode 7 0 0 station Number set once during initial setup p Previous Cancel Astat P DAMeter_Pis D ip oom Al 33 Survey Survey Options Help i lk x Name of PIL Flag Dist Error Limit 20 Dist Per Reading 1 0 m Gane aona Distance Between Flags POO m a Number of Data Probes Starting Location Qone two Suto Pacing Mede Iv oo Station Number e set once during initial setup m Previous Cancel Astat preDameter_PLE BLD 5 47 am A Step 16 Select Voltage Reading Interval Distance Between Recordings By tapping once in the field in the Setup 3 of 5 screen labeled Distance Per Reading you can type in the voltage reading interval distance in feet or meters expected between recordings for the CIS Typically in CIS work this expected interval distance is 2 5 feet or 1 meter Step 17 Select Survey Flag Interval Distance Between Survey Flags By tapping once in the field in the Setup 3 of 5 screen labeled Distance Between Flags you can type in the survey flag interval distance betwe
10. View Settings on the above menu after tapping on Survey Options 46 SECTION IV TEST EQUIPMENT HOOK UPS FOR CIS IV 1 How to make Cable Hook Ups for CIS Measurements The connections for CIS measurements employing MCM test equipment are illustrated in Figure 4 DA Meter and Equipment Heal URE CIS slits Trail vires Left Hand Right Hand Pipeline Figure 4 Cable Connections for Hook Up of MCM s CIS Test Equipment 47 As can be seen from Figure 4 a pair of canes reference electrodes see Section II 4 is illustrated the left hand cane red cane and the right hand cane green cane These canes which will be placed on the soil above the pipeline in an alternating fashion have push buttons on top of the handles so that the operator can trigger voltage recordings on his command at each of the CIS measurement locations as well as at Devices See Section III 2 for a discussion on cane button functionality Step 7 of the Set Up Process The canes data probes are connected as shown to the input terminals of the dual probe adapter and the output terminal of the adapter is connected to a 5 pin Data Probe Connector socket on the top side of the DA Meter This effectively connects the canes reference electrodes to the negative terminal of the data logger DA Meter For CIS the cables connecting the data probes to the dual probe adapter are both black band cables In orde
11. in voltage and the half cell is an integral part of the electrical circuit of Figure 1 Section I Consequently if two reference electrodes canes are used to measure pipe to soil potential in an alternating fashion their half cell voltages need to be essentially identical if any measured pipe to soil potential differences are to be attributed to the corrosive condition of the pipe rather than to any variation in the half cell voltages of the two reference electrodes A pair of canes can be tested for compatibility in the following manner The two electrodes can be placed end to end with the moist porous plug ends in firm contact and the voltage difference between them measured using a high input impedance voltmeter connected between their top terminals If a voltage difference difference in half cell voltages of less than 10mV is observed the two reference electrodes canes are matched The two reference electrodes could also be placed in a plastic bucket containing fresh water and the voltage difference measured again between their top terminals If this voltage is less than 10mV the two reference electrodes are matched for use as a cane pair in CIS measurements SECTION II MCM s DA METER DATA LOGGER III 1 Introduction MCM data loggers are sophisticated high input impedance digital voltmeter data storage units that are used in conjunction with the reference electrodes described above in Section II to perform CIS measurement
12. or some of the functions available can be enabled boxes ticked A box can be ticked or unticked by tapping once on the box The options available are as follows 31 Differential GPS Required This box should be ticked if you only want differentially corrected real time corrected GPS data to be logged by the DA Meter If this box is ticked only GPS data that has been derived using a correction message signal in real time will be logged by the DA Meter If this box is left unticked it means that you will allow the DA Meter to log either standard GPS data or differentially corrected GPS data depending upon what is being output by your receiver at any given time Please note that if this box is checked ticked GPS data will not be logged unless a real time correction signal has been received by the correction message receiver component of your GPS unit In most instances logging standard ie uncorrected GPS data would be preferable to not logging any GPS data Use GPS Altitude If this box is ticked altitude data will be included with the position data whenever GPS data is logged Note Altitude data on some GPS units is not particularly accurate in CIS applications Log GPS at Flags If this box is ticked GPS location data will be logged automatically at flags when either the flag button is tapped directly on the survey screen or when the push button on the designated flag cane is pressed Log GPS a
13. 2 00 0 0 0031 von Cist Fom e s n 0 0024 Dist From k voff NETE IPTE Ma pee TRIS u Range 5 7 YDC 400 MOhm ESNE GPS Status No Data eo Feat Device GPS Datal tog GPS prco Flag FLag CER 9 59 AM t rto DANeter_ PLS As voltages are recorded by the DA Meter by either tapping on the Read button on the Survey screen or by pressing the appropriate cane push button the Distance From Start total distance from the start of the survey parameter will increase in increments of 2 5 feet or whatever the Distance Per Reading value was that was entered back at Step 16 Distances will be in meters if the metric option was selected Also the Distance From Know Station parameter will increase in the same increments as voltages are recorded The difference in this case however will be that when each known station is registered this distance parameter will begin again at zero In other words this will show the distance you are assumed by the DA Meter to have traveled from the last known station that you encountered and registered You are now ready to perform a close interval survey using the DA Meter 45 III 3 How to Make Changes to Your Set Up Selections Once you ve setup the DA Meter for a particular Close Interval Survey as described in the above Section you can make changes to your setup selections with the exception of your Survey Type select
14. Distance B cancel You can select the type of geo feature that you have encountered by tapping once on the pull down list arrow button in the Feature field 61 Alternatively you could perform a quick search for the feature by typing in the Quick Search field the number associated with the feature or the first few letters of the name of the feature If for example the geo feature is an Asphalt Road and the width of the road that you have to cross is 20 feet you can enter a Feature Length of 20 feet see Figure 6 You could restart voltage recordings immediately on the other side of the road However if there is a survey flag an additional 10 feet beyond the other side of the road you might want to restart making voltage recordings at the flag location If this were the case the survey screen would appear as shown below Geographic Feature Quick Search Je Feature Length Bo Skip Distance a0 i Notes fsur vey flag 10 feet beyond end of asphalt road B DAMeter PLS Du zzomm f By tapping once on the Save button the survey screen shown below will appear Survey Survey Options Help vM Y A ys station 2497 5 1 0089 va Loa 297 5 0 8993 voff Dist From Station i Range 5 7 V DC 400 MOhm Known 2 5 Device Read 62 As can be seen from the above screen the DA Meter s software assumes that you are 2 5 feet short of the survey
15. Page AUMAR A 10 11 12 14 15 46 47 48 Continued Over SECTION V HOW TO PERFORM CLOSE INTERVAL SURVEYS V 1 How to Carry Test Equipment During a CIS 00 50 V 2 How to Examine and Record a High Low Voltage Waveform 51 V 3 How to Record the Voltages at a Starting Test Station 53 Wid How toPerfotm a GIS ice niasiousk on aoe eiker E E EERE ESEE 54 V 5 How to Use the GPS Buttons if Active on the Survey Screen 65 SECTION VI HOW TO COPY SURVEY FILES FROM THE DA METER TO YOUR PC VI A ROCUICHON 252 Sonek ae nut son EE EEE ena gue ons 67 VI 2 The Manual Approach lt a vciun sn dve tence geaceeleochobwinlo lt de oleReee 67 VI 3 Using the Driver in the ProActive Program 0e eee eeee 68 APPENDIX 1 How to Connect the Chainer and Counter Unit for CIS Applications cc cee eee cence eens 11 APPENDIX 2 How to Delete Survey Files from the DA Meter 85 SECTION I INTRODUCTION AND BACKGROUND I 1 Introduction This manual is designed to provide individuals who will be performing Close Interval Potential Surveys CIPS or CIS with a practical knowledge of how to select appropriate test equipment how to set up and properly connect the test apparatus how to actually perform close interval potential surveys and ultimately how to transfer upload stored survey data from data loggers to a database management system after performing suc
16. just the magnitude of the IR drop In this case the voltmeter would determine the average of the maximum and minimum voltages read during each rectifier current cycle 40 With this voltmeter reading mode selected the screen shown below will appear Survey Survey Options Help n x Setup 5 of 5 Voltmeter Setting Read Mode f EEEE Range 5 7 VOC 400 MOhm Cyde ms l 4 M Average Sam les g On Fag oing Average Samples t 7 of Boo ene 10 00 AM A Again you would make your selection of ON and OFF cycle times In this PES DAMeter_PLS case you would also provide a number for the Moving Average Samples In the above case since the number 4 has been entered 4 sample readings would be used to compute an average value for the Minimum Min voltage reading during each OFF portion of the cyclic waveform and also 4 sample readings would be used to compute an average value for the Maximum Max voltage reading during each ON portion of the waveform On Off Pairs GPS Sync This voltmeter mode can be selected if you are using the MCM GPS unit on your DA Meter and current interrupter switches equipped with GPS units were being employed on your rectifiers In this case voltage readings High Low readings are synchronized with the current interrupter switching timing With this voltmeter reading mode selected the screen shown below will appear 41 Survey Survey Options Help maA x Setup 5
17. measurement is recorded All subsequent Device locations however will be indicated permanently with a D marker on the graph in the survey screen Survey Survey Options Help v A ka Station 0 0 0 1 0089 v On Dist From k Start 0 90 0 0 Dist From n vof Station Range 5 7 DC 400 MOhm Known ERE Geo Feat Device Read Dal to i ido Flas FLag Since we indicated during the DA Meter s setup process that we expected to record voltages every 2 5 feet each time you trigger readings using the right hand cane s push button the data logger will assume that you have traveled an additional 2 5 feet down the line section Consequently you should try to place the electrodes over the pipe at 2 5 feet intervals For instance the screen will appear as shown below after the second triggering event it is assumed that your first reading first triggering event will be at the starting location 56 Survey Survey Options Help vm yg Ne ys vo 042 5 1 0103 vo or 25 9 9000 Dist Fom 0 900045 Known Station Range 5 7 DC 400 MOhm Geo Feat Device PS Data Log GPs tinda As can be seen from the above screen the DA Meter assumes that you are now at a distance of 2 5 feet from where you started which was at starting station 0 0 0 or 0 00 0 The DA Meter s software program will add 2 5 feet to the assumed distance from the starting statio
18. readings at previously located anomalies during the course of a CIS By doing so a special Device selection named Mark DCVG will be made available in the Device list which has a sidedrain prompt associated with it as indicated in the screens shown below Device Readings Mark DCWG Reconnect Single Test Station est Station wi AC x ine Crossing wf No Bond ine Crossing wf Bond ine Casing Test Staticn atm CVG ocation 1 37 5 ark DCVG C known Location CPE 12 09 PM ral pig DAMeter_PLS 23 Mark DCVG Mark OCVG DCVG Side Drain On mv 1 2 Off mY 0 7 Total mi 0 5 Reacing Mode ON OFF Gs Sync 7 voltage Range 5 7 WOC 400 Mohn E 2 7 a21 FAl The Mark DC VG device will not appear in the Device list if this box is not checked which would be the case if you were conducting a regular CIS BigDAMeter PLS If the following selections have been made so far the Setup 1 of 5 screen will appear as shown below Survey Type Trigger CIS Survey Flag Read D C P Accept Save Survey Walking Direction Increasing Metric NOT selected Survey Survey Options Help w A Survey Type Trager CIs x Rectifier mode cycle ON OFF 7 Use Metric Cane Button s Allowed To Survey Right Survey Walking Direction Increasing O Decreasng cat once during iritial setup PRIDAMeter PLS Step 9 Make Rectifier Mode selection
19. same effect as tapping the accept button and then tapping the save button on the Device Readings screen For the most part selecting the accept and save choice will be preferable since voltage recordings at special data collection points such as rectifiers test stations valves etc are important and should be saved as part of the overall CIS and the most convenient way to do this is to use the push button on one of the canes having tapped on the Device button on the screen when a Device is encountered 22 Step 8a Make Survey Walking Direction selection The Survey Walking Direction field is shown in the screen above as part of the Setup 1 of 5 screen There are only 2 selection choices Increasing and Decreasing This selection establishes the walking direction during the survey If the survey is going to entail walking from a low numbered test station to a higher numbered test station for example select Increasing by tapping once on the circle beside Increasing Select Decreasing if the opposite is true Step 8b Make selection of Metric units if required By checking off the box labeled Metric the reading interval distance between voltage recordings and the flag internal flag spacing will be displayed on the Setup 3 of 5 screen in meters as opposed to feet Step 8c Check off DCVG Sidedrains in CIS Survey if you plan to log DCVG sidedrain
20. soil voltages see above 80 Trail Wire 3 pin terminal Chainer Test Station Hip Pack or fer Back Pack Wire F Spool Counter Display is 3 pin terminal i External Beeper To Dual Probe Adapter Use Black Band Cables With Trail Wire i Connected as Banana Plug Terminals a Shown for negative DATA LOGGER pipe to soil readings Figure 1 Counter Display Unit Mounted on Tray Connections for Manual Triggering of Readings Using Data Probe Push Buttons 81 Trail Wire 3 pin terminal Chainer Test Station Hip Pack or Back Pack Wire gt Spool 3 pin terminal Trigger Counter Display is Cable i To Data Probes DATA LOGGER Figure 2 Counter Display Unit Mounted on Tray Connections for Automatic Triggering of Readings banana plug cables not included with package are connected to the data probes MCM data probe cables are not used 82 Trail Wire 3 pin terminal a Chainer Test Station Hip Pack or Back Pack Counter Display DaN y Optional 2 WE External Ei Beeper 3 pin terminal To Dual Probe Adapter Use Black Band pro Cables With Trail Wire Connected as Shown erminal for negative DATA LOGGER pipe to soil readings Banana Plug Prongs Figure 3 Counter Display Unit Mounted Directly
21. 6 0001 5 82 00016 78 00016474 0715 70 0001 5 66 0016 62 0001 G 58 0001 6 54 0001 5 50 0001 6 46 0016 42 00915 38 As can be seen from the above window the actual readings recorded during the CIS are presented here It can be seen that readings in this case were taken at 4 feet intervals And the High and the Low voltage readings are presented at each of the measurement locations It can also be seen from the above window that DCP Device and or Geo Feature locations are identified for example a line marker is indicated at the first measurement location By clicking on the Device Readings tab the window shown below is displayed 73 EE DA Meter Driver Pipeline Survey ioka Survey Info ae Device a PLS Graph DCP Featre yan Naat aes Reirson lace ora 0001 2 22 Line Merker ATT Test Staton 00000 Casing Yent OO000 Custom 1 noana Custom 1 0000 Power Line Cr O 0000 Line Merker 0 0000 Bend n Pipe 00000 Custom 2 o p000 Line Gossing 00000 Line Grosso 1 2505 Line Grossing 0 0696 Line Crossing 1 2505 Line Crossing 1 4747 2696132 26 96132 2 96132 4FT OIN 26 96247 4FT 7IN 26 96360 IRON GIANT 26 96444 26 96457 LEFT 26 96457 AGM 12 25 96457 DUKE ENER 26 96458 NO TEST 5T 26 96458 TOP LUG OF 26 96458 FAR GROUN 26 96458 BOTTOM LU 26 96458 ous 98 06273 98 06273 95 06352 98 06450 98 06516 98 06525 98 06525 98 06525 98 06533 38 06533 98 06539 98 06539
22. Close Interval Potential Surveys CIPS or CIS using MCM s Integrated Pipeline Survey Test Equipment and Database Management Package CIS Training Manual DA Meter Version MMA MoCo MILLER Co M C Miller Co Inc 11640 U S Highway 1 Sebastian FL 32958 U S A Telephone 772 7949448 Website www mcmiller com MANUAL CONTENTS SECTION I INTRODUCTION AND BACKGROUND Introduction Background on ECDA Methodology and Role of CIS CIS Overview Key Components of a CIS Measurement System BRWN Re SECTION II MCM s REFERENCE ELECTRODE FOR CIS II 1 Background b 35 09 25 sdiloe oS Riess asda Asdaa eed tesatueescaun emi acedees II 2 How to Prepare Reference Electrode for Use II 3 How to Use Reference Electrode in CIS Measurements II 4 How to Use Matched Pairs of Reference Electrodes Canes SECTION III MCM s DA METER DATA LOGGER HI 1 Introduction III 2 How to Set Up the DA Meter for CIS Applications III 3 How to Make Changes to Your Set Up Selections SECTION IV TEST EQUIPMENT HOOK UPS FOR CIS IV 1 How to Make Cable Hook Ups for CIS Measurements IV 2 How to Attach Cables and Accessories to the DA Meter Commer er ee reer rrr erer reer errr rreerresesreesesesesssessessescece eee ere ee cece Commer ere er rer err eer reser reerseseereeesesssesesseseeesvecece ey Ce Comm merece reer err rere rer rerererererreereeserssersesesereesseses voce Ce ey eee ewer rece ce Cy
23. ailed below e Double click on My Computer on your PC e Double click on Mobile Device e Double click on My Handheld PC e Double click on CompactFlash e Double click on dameter_data e Click on the survey file you wish to copy highlight the file e Copy the file to a local folder You would now be in a position to send the survey file to a recipient who has access to the ProActive software program Note Do not rename the survey file prior to sending the file to the recipient as the survey file must have the same name as the survey itself VI 3 Using the Driver in the ProActive Software Program Step 1 Create a folder on your PC s hard drive that will be used to permanently save files copied from your data logger You might choose to name this folder something like Surveys If you are only interested in viewing survey data in the form of excel spreadsheets you should also create a folder within the Surveys folder that can be used for this purpose and name this folder something like Exported Surveys More on this later Step 2 Connect a serial data communications cable between the DA Meter s 9 pin communication terminal see Section IV 2 Figure 5 and the serial data communications port on your PC and switch on your DA Meter With Microsoft s ActiveSync installed the ActiveSync 68 window will appear on your desktop and the program will confirm that two way communi
24. atively as discussed in Section III 2 Step 14 you can pre program the DA Meter to automatically log record GPS data at items such as Flags Devices and Geo Features With reference to Section III 2 Step 14 setting up the DA Meter with GPS choices If you placed a tick in the box labeled Log GPS at Flags GPS data will be logged automatically at survey flags when either you tap on the Flag button on the survey screen or when you trigger the flag designated cane If you placed a tick in the box labeled Log GPS at DCP Feature GPS data will be logged automatically at Devices or Geo Features when you tap the Device button or when you tap the Geo Feat button Obviously with automatic logging of GPS data you do not have to remember at each critical location to go through the GPS logging step 66 SECTION VI HOW TO COPY SURVEY FILES FROM THE DA METER TO YOUR PC VI 1 Introduction Survey data are stored in independent files one file for each survey on the CompactFlash memory card on the DA Meter and you can copy survey files to your PC using one of two approaches manually or via the driver in the ProActive software program The ProActive software program represents MCM s pipeline integrity database management system and this program allows integration of pipeline survey data in a database system and offers extensive reporting both textual and graphical capabilities
25. cation one Two auto Pacing mede y 1029 set once during Station Nurer PRIDAMeter_PLS 23 sam A You can select to have location information displayed on the survey screen as station number feet or milepost station number meters or kilometers for the metric case Whichever selection you make here will determine how you enter your starting location information For example if your pipeline locations are represented by station numbers you would select Station Number from the drop down list and you would enter a starting location for the survey in the form of a station number If you do not know the station number where you re beginning your survey enter 0 0 0 36 As an example if you are working on pipeline ABC within valve segment 45 and you are about to begin a CIS at station number 12 0 0 your Setup 3 of 5 screen would be as shown below ji fiss Flag Dist Error Limit 20 e Name of P L KGRS ABT Det FONR ME FR valve segment Distance Between Flags 200 ft s Number of Data Probes Starting Location Cone Two site Bseina ede A 200 station Number tsat once during initial satup PRIDAMeter PLE Bil as am Zl Step 24 Tap once on the Next button on Setup 3 of 5 screen The screen shown below will appear Setup 4 of 5 screen Survey Survey Options Help 0 A Set up 4of5 Work Order Technician Name Comments Description File Name
26. cation has been established Step 3 Double click on the ProActive icon on your PC s desktop screen This will open up ProActive s main menu window A window labeled Entire Database will also be seen here The suggested organization of your Entire Database is discussed in the ProActive Training Manual Step 4 Click once on the Surveys button on the main menu bar at the top of the screen This will open a window labeled Data Logger Get Pipeline Survey By clicking on the pull down list arrow button in the Data Logger field you can select the data logger from which you are copying the survey file As shown in the drop down list the various data loggers currently supported by ProActive are offered as choices Step 5 Select DA Meter Option Highlight DA Meter in the drop down list and click on the Go button This will open up a window labeled Driver Pipeline Survey Note It may take a few seconds for the Driver Window to appear Step 6 Select the Survey File to be Copied Select Pipeline Survey in the field labeled Data Type The Surveys field in the DA Meter Driver window will list all of the survey files currently stored on your DA Meter s CompactFlash memory card Highlight the survey file that you would like to be copied to your PC Also place a tick in the box labeled Copy to Local Folder and identify the folder s locati
27. ce on the save button on the survey screen Having done so the screen shown below will appear Device Readings x Valve Condition Good X Notes Peren cancer This screen allows you to note the condition of the valve and to make any relevant comments about the valve After tapping once on the Save button the Survey screen shown below will appear Survey Survey Options Help vl 9 el vs ssn 3450 0 1 0103 vos Dist From 350 0 Start Dist From 0 9000 Vv OFF babi 50 0 paul Range 5 7 V DC 400 MOhm Geo Feat Device Read iPS Dat Log GP unde Flag FLag Since in our fictitious section of pipe the valve represents the end of the section you would terminate the survey by tapping once on Survey in the menu bar and selecting Finish Survey 64 At this point you have completed the CIS on this section of the pipeline and the survey data have been stored saved in the DA Meter s memory in the file that you named at the outset of the CIS You are now ready to upload the survey data to MCM s Database Management System see Section VI V 5 How to Use the GPS Buttons if Active on the Survey Screen If you selected a GPS receiver type during your setup process Section III 2 step 13 the two GPS button will be active on the Survey screen as shown below Survey Survey Options Help wM Y uel s x oe e 0 9000 Dist From a
28. ctive Cancel You are being prompted here to accept and save the Far Ground voltages prior to breaking the trail wire connection see Section III 2 Step 11 for an explanation of Far and Near Ground readings By doing so the screen shown below will appear 59 Device Readings X ory Metal IR Reading Mode ON OFF z Reading Range 57 YDE 400 MOhm 7 garuan 0 0012 i pag v oF 19 0009 OFF f vorter pee Astat preDaMeter_PLe EPE At this point you are being prompted to take Metal IR readings at the test station To do so you would connect a test lead from the black banana plug terminal on the DA Meter to the test station and disconnect the reference electrode data probes you could place the ceramic plug ends of the probes on top of your shoes to provide an open circuit At this point the DA Meter will be reading the potential difference between the two test stations the far ground station and the near ground station If you d like to record the Metal IR data you would save the readings by tapping on accept and then save after setting up to take the readings The next screen to appear is as shown below Device Readings xi Sinale Test Station Near Ground reading __Note r Raadng Mode ON OFF Reading Range 5 7 DC 400 MOhm j Voltmeter Read on 1 0089 ee ON e OFF 0 8993 v OFF y t ii votmeter e caneat In this cas
29. ctual recordings and space them evenly over a 100 feet span distance between survey flags regardless of the actual number of recordings made This selection is highly recommended Step 20 Select the number of reference electrodes canes that will be used in the CIS The number of reference electrodes also known as data probes that will be used in the CIS can be selected by tapping on either the one or two circle in the box labeled Number of Data Probes Step 21 Provide the Name of the Pipeline By tapping once in the field labeled Name of P L you can type in the pipeline name Note This is not the same as the filename for the CIS that was selected back in Step 4 This is the actual name of the pipeline 35 Step 22 Provide the Valve Segment Identification Number or Name By tapping once in the field labeled Valve Segment you can type in the valve segment number or name if known Step 23 Provide the Starting Location for the Survey Tap the pull down list arrow button in the Starting Location field which will reveal the options available regarding how you would like location information to be displayed The Setup 3 of 5 screen will be as shown below for the non metric case Survey Survey Options Help WA Flag Dist Error Limit Name of P L iy n oO a7 K3 D Dist Par Readng la Valve Segment Distance Between Flags Number of Data Probes Starting Lo
30. d after tapping on the OK button the screen shown below will appear Survey Survey Options Help n x Setup 5 of 5 Voltmeter Setting PISDsMeter PLS Bt 10 07 AM The specific On and Off times for the particular current interruption waveform cycle that will be employed during your CIS should be entered in the Cycle ms fields The On and the Off times should be entered in milli seconds Note Ideally the interruption waveform period which is the On time plus the Off time should be less than the time between triggered voltage recordings on a CIS For short waveform periods lt 1 second for example this is not a concern as a typical walking pace would translate to a time between triggered voltage recordings of greater than 1 second However care should be taken if longer waveform periods are in effect for example several seconds long waveform periods in which case a slower than normal walking and triggering pace would have to be employed to avoid recording several same value readings until such times as a new waveform cycle has occurred On Off Pairs Min Max mode This voltmeter mode would be selected if you were performing a High Low CIS but the DA Meter was having trouble distinguishing between the High and the Low voltage readings This would be the case for example if the IR drop was very small remember that the difference between High and Low voltage readings in a current interrupted CIS is
31. d an integral part of an ECDA evaluation Close interval potential surveys are performed in order to obtain a continuous potential profile along the pipeline In the Cathodic Protection industry it is well known that pipe to soil potential voltage measurements at test stations which are typically spaced a considerable distance apart are insufficient to judge the overall condition of a pipeline and to judge whether or not there is complete protection As a result close interval potential surveys involving the measurement of potentials at short intervals along the entire length of a pipeline have become the industry standard In fact with regard to the ECDA protocol pipe to soil potential readings are typically recorded at 2 5 feet intervals between test stations Test stations are insulated electrodes that are in permanent electrical contact with the pipeline and that can be contacted above ground I 4 Key Components of a CIS Measurement System The diagram below Figure 1 illustrates the essential components of a close interval potential survey measurement apparatus Test Data Logger Station Reference Flectrode z Figure 1 Key Components of a CIS Test Equipment System The key components of the CIS apparatus are the reference electrode connecting the negative terminal of the data logger to the soil and the data logger the positive terminal of which is connected to the test station and therefore to the pipe The
32. data logger is a sophisticated digital voltmeter data storage unit Consequently with this apparatus the potential difference voltage difference between the pipe and the soil at the reference electrode location can be measured and this data point voltage at a specific location along the length of the pipe with respect to the reference electrode can be stored for processing by means of the digital voltmeter data storage unit data logger Similarly data of pipe to soil potential with respect to the reference electrode can be recorded at intervals of typically 2 5 to 5 0 feet along the length of the pipeline The ultimate goal of a CIS is to identify locations if any along the length of a buried pipeline that are not registering a sufficient potential difference between pipe and soil which would be indicative of locations that might be experiencing external corrosion As discussed below in Section II there is an industry standard 0 85 Volts or 850mV which is applied in the Cathodic Protection industry and which represents the minimum potential difference voltage recorded between the pipe and the soil with respect to a particular reference electrode see below in Section II that signifies sufficient cathodic protection Since on a pipeline that is under cathodic protection impressed current CP the pipe is held at negative potential negative side of the rectifier is connected to the pipe the minimum potential difference bet
33. e Known RRR Station Range 5 7 V DC 400 MOhm Geo Feat Device GPS Data Log GPS Undo Fi g FLag If you have a GPS receiver attached to your DA Meter via the COM 1 Port and the receiver has been properly configured to output NMEA data strings in the GGA format see your DA Meter User s Manual Appendix 1 if you are using a Trimble GPS Pathfinder receiver you will be able to conveniently examine position data in real time at any given location on your survey using these GPS buttons By tapping once on the GPS Data button you can view a summary of the GPS data associated with your current location You can also see how many satellites Sat In Use were used in the determination of the position data for your present location Ideally a minimum of 5 satellites should be involved for good position accuracy 65 GPS Data x Latitude N 27 64737 Longitude 90 41517 N _ Stop Altitude 65 feet View NMEA Data Sat In Use O GPS Mode Standard GPS GPS Fix Time 19 18 51 You can also view the NMEA data output by the GPS receiver by tapping once on the View NMEA Data button on the above window New NMEA data will stream into the DA Meter every second You can freeze this data by tapping once on the Stop button which will allow you to examine the NMEA data strings You can also log record GPS data at any location on your survey by tapping once on the Log GPS button Altern
34. e you are being prompted to accept and save the Near Ground voltages after connecting the trail wire to the second test station TS2 If you recorded the Metal IR data you would first disconnect the test lead from the DA Meter and then reconnect the data probes 60 If the Far and Near Ground voltages are within the maximum allowable difference range that you established during your setup procedure see Section III 2 step 11 you will be returned to the Survey screen as shown below If on the other hand the Far and Near Ground voltages differ by more than the allowable range a window will appear showing all four readings and asking you whether or not you will accept the readings as is or if you would like to re take the near ground readings Survey Survey Options Help vM Y ue ys station 2440 0 1 0089 vo Dist From 240 0 Start ar 0 8993 vo Known 40 0 Station Range 5 7 V DC 400 MOhm Geo Feat Device Read iPS Dat og GP una Flag Now let s assume that at an additional 30 feet down the pipe from the reconnect location you encounter a Geo Feature ie a geographical feature of some type In this case when you reach this location you would tap once on the Geo Feat button on the survey screen At this point the screen would be as shown below Geographic Feature Quick Search 1 Highway Feature Length V Known Location 2 70 0 Skip
35. e actually voltages that are measured by a voltmeter The 5 choices available for the voltmeter s reading mode are observed by tapping once on the pull down list arrow button in the Read Mode field The screen will appear as shown below Survey Survey Options Help oag x Setup 5 of 5 Voltmeter Setting Read Mode Sie ERRET Ranges 5 7 VY DC 400 MOhm airs CSP mode On Off Pairs Min Max mod On Off Pairs GPS Sync ingle Read GPS Timing Asat eo 2206 Pig DAMeter_PLS ee 2 12 AM ta The 5 choices for voltmeter mode are as follows Note Selection of voltmeter mode should be made with reference to your selection of Rectifier Mode back at Step 9 and your selection of GPS Accessory back at Step 13 Single Read This voltmeter mode would be selected if you were performing a non interrupted CIS with either the rectifiers ON continuously Always ON or OFF continuously depolarized pipeline On Off Pairs DSP mode This voltmeter mode would be selected if you were performing a High Low CIS current interrupted CIS In this mode the voltmeter uses digital signal processing to determine the voltage during the ON portion of the rectifier current cycle and the voltage during the OFF portion of the current cycle A measurable difference between the High and the Low voltage readings is required for this mode ie a measurable IR drop is required 39 With this voltmeter reading mode selecte
36. eads with distilled water or MCM s Electrode Anti Freeze solution The plastic tube should then be screwed back on to the threaded cap copper rod assembly and tightened firmly do not over torque to effectively seal the tube via the compressed O ring At this point the electrode assembly should be shaken a few times to make sure that a saturated solution of copper sulphate is formed inside the tube Remember that the half cell is established as discussed in Section II 1 between the copper rod and a saturated copper sulphate solution Once the tube is shaken the liquid will be blue in color and there should always be some excess copper sulphate crystals remaining out of solution at the bottom of the tube Before using the reference electrode for the first time a period of at least 5 minutes should be allowed after filling the tube and establishing the saturated solution in order that the porous plug on the bottom of the electrode tube can become moist The protective cap supplied with the electrode assembly should be kept on the porous plug end when the electrode is not being used For more details on the preparation and maintenance of copper sulphate reference electrodes including important safety precautions please visit the M C Miller Co Inc website at www mcmiller com On the home page click on manuals data sheets and then click on Electrodes How to use and maintain copper sulphate electrodes II 3 How to U
37. ear as shown below wnfval el ve x station 2 00 0 1 0089 O n Seaver reer erenereRTD mf 1200 0 FEE a 0 8993 vof e o M O E E E Known Station Range 5 7 DC 400 MOhm Geo Feat Device Read PE Data Log GPS undo flag FLag_ In this case the station number is now 2 00 0 The 2 represents an assumed 200 feet from the reference zero location A second Flag marker also appears on the graph Let s now assume that you encounter a second test station TS2 in Figure 6 at a distance of 40 feet from the second survey flag location and you need to do a reconnect of the trail wire at this location 58 In this case when you encounter the test station you would tap once on the Device button on the survey screen and then highlight reconnect The Device Readings screen at this point will appear as shown below Device Readings Single Test Station ine Crossing w No Bond ine Crossing wi Bord ine Casing Test Station Consumer Pirciase Sales Tap POD R Drop Coupon z Reconnect sis _ Known Station Eig DAMeter PLs By tapping once on the Next button the screen shown below will appear Device Readings xi Sinale Test Station Far Ground reacing ae l Rsadng Mode ON OFF Reading Range 5 7 DC 400 MOhm Voltmeter Read on ON 1 0103 E ON v Accept gt oF 0 9000 Previous Voltmeter a
38. ection III 2 or we can view actual readings and graphical representations of the CIS readings for this example By clicking on the Survey Settings tab the window shown below is displayed 71 EE PAMcter Driver Pipeline Survey Download Survey Settings Readnas Device Reading Graph Bect ier Mods Cycle ON POF Acosst gt Save Care Button Mowed To Survey Pase Flag Survey Walking Direction Decreasing Use Metric N 15 GOHe 0 350 MEM Exteiral Use GPS Ahitude bul Sito Log GPS amp Flags buf Y Y DCVG Defect Mex mY lst read of Tol mv Diferential GPS Required g Distperreading Cd Distbetwosn Flags w Mamet PAL EON MOBIL T2inch Current Station 0482 0000 Wave Segment Time ToWelkBetweenFlecsinSecs 4S Pree Auten nan N As can be seen the settings data indicate a Continuous CIS with rectifier in the current ON OFF mode Additional settings information including the voltmeter settings would be seen by scrolling down Again these survey settings were established during the DA Meter survey setup procedures see Section III 2 By clicking on the Readings tab the window shown below is displayed 72 EE DA Moter Driver Pipeline Survey a Readings Device ae PLS sica R DaaNo i on Sef Staton No _ Dnvchane OTYolage cormente_ DcP FeaurdLaiuce Lergtude_ atiu Hin EA Tee n Py 75 399 00017418 0917 14 00017 4110 0017 06 0917 02 0001 6 98 00015494 0001 5 90 0016 8
39. either a set of poles or a set of canes As is discussed in Section I MCM s data loggers can be set up to accept readings voltage readings during the performance of a CIS from two reference electrodes canes In this case the canes would be connected to the data logger via the dual probe adapter mentioned above 12 Since each cane in the pair has a push button switch located on the handle section on top of the cane the individual performing the CIS can determine which of the two canes reference electrodes is to be involved in a voltage recording at any given time As discussed in Section III 3 these push buttons can also be designated to have other functions such as registering a survey flag location for example When performing CIS measurements using a pair of canes one of the canes is held in the operator s right hand green colored cane while the second cane is held in the operator s left hand red colored cane When for example the right hand cane is placed in electrical contact with the soil above the pipe and the push button switch is activated on the cane the DA Meter see Section III 3 will record the pipe to soil potential with respect to the right hand cane reference electrode Similarly when the left hand cane is placed in electrical contact with the soil above the pipe and the push button switch is activated on the cane the DA Meter will record the pipe to soil potential with respect to the lef
40. elow in detail in Section II 2 III 2 How to Set Up the DA Meter for CIS Applications The following section outlines the steps required to setup the DA Meter to participate in CIS measurement applications The setup process establishes the conditions of the particular survey about to be performed and identifies the section of pipeline that is about to be examined by the CIS application The setup process also establishes a file in which the voltage recordings survey data will be stored At the completion of the survey CIS data can then be retrieved by a PC that is in communication with the DA Meter by accessing the file in which the survey data are stored The process of transferring CIS data to a PC following completion of a survey is discussed in Section VI Step 1 Switch on the DA Meter by pressing the power button Assuming that the battery pack is charged the screen will light up and will display the Windows Powered Handheld PC 2000 desktop screen as shown below assuming that the operating system running your DA Meter is Windows Handheld PC 2000 My Handheld Pc ve Fl DAMeterss a E Recycle Bin boo 9 12 Fea ie Handheld PC 2000 Step 2 Double tap using the special pen stylus provided with the DA Meter on the DA Meter PLS icon This will open the software program that will run the DA Meter for Pipeline Surveys The window shown below will appear Note It may take a few seconds for this w
41. en survey flags for the section of pipeline being measured Typically survey flags are located at 100 feet intervals or around 30 meter intervals Step 18 Select the maximum permissible error between the actual number of recordings made between 2 survey flags and the expected number of recordings 34 By tapping in the field labeled Flag Dist Error Limit you can type in the maximum permissible error For example the maximum permissible error is indicated as 20 on the above screens If the recording interval is expected to be 2 5 feet and the survey flag separation is 100 feet it means that 40 recordings are expected If however only 30 recordings are actually made between survey flags an error window will appear on the screen since there is a 25 difference between the expected and actual number of recordings made No error window will appear if the difference is less than 20 for this example ie you could have a minimum of 32 recordings and a maximum of 48 recordings between survey flags to stay within the 20 max error allowance Step 19 Select whether or not you would like the recordings to be uniformly spaced between survey flags in cases where the actual number of recordings made between flags deviates from the projected number flag separation recording interval By tapping in the box labeled Auto Pacing Mode and inserting a tick in the box you will enable the DA Meter to automatically adjust the a
42. flag on the other side of the asphalt road and that your next voltages will be recorded when you trigger the read cane when you are actually at the survey flag location Notice that a G marker has been added to the graph for Geo Feature By triggering the read cane your right hand reference electrode cane the survey screen shown below will appear You can also trigger the flag cane your left hand reference electrode cane at this time to register the survey flag vil s x Station 3 00 0 1 01 03 o kn EEEE AET a Booo 0 9000 Dist From Known Station Range 5 7 V DC 400 MOhm E BA Geo Feat Device Read iPS Data Log GP Undo Hlog Flag v of Now let s assume that you encounter a Valve at an additional 50 feet down the pipe from this survey flag see Figure 6 Since a valve is considered a Device you would stop and tap once on the Device button on the survey screen and then tap on Valve The screen shown below would appear Device Readings x Valva Pipe To Sail Note Reacing Mode ON OFF Reading Range 5 7 DC 400 MOhm Voltmeter Read ON 1 0089 5 ON s ccep gt OFF 0 8993 v i ii magg Gave Voltmeter f ctive Cancel 63 In this case you would record the pipe to soil voltages at the valve location by triggering the right hand cane or by tapping once on the Accept button and then on
43. fy the survey and also recorded data voltages will be stored in this named file for future retrieval It is highly recommended that a protocol be established for selecting Survey Filenames Critical information should be included in the filename such as pipeline company s name city or state in which the pipeline is located pipeline number and section of pipeline number under survey The protocol developed should be applied consistently for each survey 17 For example let s assume that pipeline company XYZ has a pipeline located in Texas and that the pipeline is identified as pipeline 12 and a survey is being performed on section 085 of this pipeline A good filename for this survey would be XYZ TX 12 085 CIS When this data file is later accessed with this filename we know the name of the pipeline owner we know the state in which the pipeline is located we know the pipeline number we know the section number of the pipeline that was surveyed and we know that it was a CIS Note You will not be permitted to use invalid characters such as slashes or as part of a filename You will be alerted if you try to use any invalid characters Step 5 Tap once on the OK button The window shown below will appear This is the first of 5 so called setup windows ix Survey Type Trigger CIS Rectifier Made Cycle ON OFF D ise Tetig Cane Button s Allowed To DCVG Sidedrains in CIS Surveys D C P Sur
44. h surveys The equipment and software described here comprise MCM s Integrated Pipeline Survey Test Equipment and Database Management Package I 2 Background on the ECDA methodology and the role of CIS By way of background the National Association of Corrosion Engineers NACE under a directive from the U S Government recently developed a methodology for assessing and reducing the impact of external corrosion on the integrity of onshore buried pipelines primarily ferrous pipelines The methodology is termed an External Corrosion Direct Assessment ECDA ECDA is a continuous improvement process designed to not only identify areas where external corrosion is underway but to also predict potential future corrosion areas which will assist greatly in future corrosion prevention The ECDA methodology is a 4 step process and each step must be performed to fully satisfy the integrated requirements of an ECDA evaluation The 4 major steps in the process are summarized below Step 1 Pre Assessment This step requires the integration of historical construction operations and maintenance records for each ECDA Region Step 2 Indirect Inspection The objective of this step is to estimate areas of active corrosion by performing above the ground measurements The results obtained in Step 2 are compared with the information compiled in Step 1 and areas that need to receive Direct Examination are identified Step 3 Direct Examination
45. he OFF state Also if 150 ms was selected for the On Delay the data logger would record the voltage value sampled 150 ms after the rectifier current was switched from the OFF to the ON state Finally select your current interrupter s Downbeat frequency As indicated by tapping on the pull down list arrow button in the Downbeat field there are 3 selection choices Each Minute Each Hour and Midnight If Each Minute is an option for your current interrupter we suggest making this selection Also if your interruption cycle starts with the current in the ON state the first transition is from ON to OFF place a tick in the Start Cycle box remove the tick if the opposite is true Single Read GPS Timing This voltmeter mode is similar to the Single Read mode except that in this case the data logger uses the GPS clock signal to associate voltage recordings with the actual time they were made With this voltmeter reading mode selected the screen shown below will appear Survey Survey Options Help fynj ee x Setup 5 of 5 Voltmeter Setting Read Mode Sela ea Range 5 7 VOC 400 MOhm GPS Settings Astat ameter Ps EuD 10 58 am KA 43 The only additional information that needs to be supplied here is the type of GPS unit you will be using which you can select by tapping on the GPS Settings button Currently only the MCM GPS unit can be used in this voltmeter readi
46. he magnitude of the IR drop can be determined which would just be the difference between the current ON and current OFF voltages In terms of CIS measurements a convenient way to sample or capture current ON and current OFF pipe to soil voltages is to employ a Current Interrupter which is a current switching device that is connected to a Rectifier The Current Interrupter can be programmed to switch the rectifier current ON and OFF in a predetermined cyclic fashion In this case when a cane is in contact with the soil and the push button on the cane is pressed in the process of a CIS the DA Meter will record the High and Low voltages taken over at least one current ON OFF cycle Such a Current Interrupted method is known as a High Low CIS mode 25 It should be noted that all rectifiers that might have an affect on a pipeline under survey ie might generate current in the line need to simultaneously be switched ON and OFF in an identical cyclic fashion and in addition all current interrupter waveforms ON OFF cycles need to be synchronized with each other In other words all rectifiers need to be ON at the same time and for the same length of time and all rectifiers need to OFF at the same time and for the same length of time One way to accomplish such synchronization is to have GPS receivers integrated with current interrupter switches and to employ a GPS satellite s timing system to c
47. ical cables are provided for these connections in the MCM Integrated CIS Test Equipment Package A schematic illustration of a reference electrode cane assembly is shown above in Figure 2 If a matched pair of reference electrodes canes is to be used see Section II 4 the top terminals of the two canes are connected to an MCM adapter dual probe adapter and the adapter is connected effectively to the negative terminal of the voltmeter see Section IV for cable hook ups At this point a voltage reading can be made using the data logger establishing the pipe to soil potential difference with respect to the copper sulphate electrode at the first measurement location The operating procedures for the data logger are described in Section III All subsequent CIS measurements can be made in the same fashion by moving down the length of the pipeline between test stations and placing the reference electrode or electrodes if using a matched pair in good electrical contact with the soil at intervals of 2 5 feet or some other distance interval Since the distance between test stations can be significant the electrical wire trail wire connecting the data logger to a test station needs to have considerable length II 4 How to Use Matched Pairs of Reference Electrodes Canes In CIS measurements it is convenient to use a pair of matched reference electrodes rather than a single reference electrode A pair of electrodes is referred to as
48. indow to appear Survey Survey Options Help w A Lecation Dist Fom Start Dist Fromm Vv Known Station Range None Seectad fieo Feat Device laps Datal Log GPS bade Flaq Flag pig DAMeter_PLS Du 2 xam f This is the Main Survey Window At this point a survey has not been set up the setup process is what we are going through here and so no information is currently displayed in this window Step 3 Tap once on the Survey button situated in the Menu Bar in the top left hand corner of the window The window shown below will appear 16 eMail Survey Options Help New Survey Ctl4N Continue Previous Survey Ctrl C Finish Survey CtrhF paewee cocns cones recon cecce ene couse cou s ceveccencs seseq Exit Ctril X PE TA ues Wc guked aah aa kVaSudeh as eve noses Dist From Known Station Range None Selected been ccccc cme cnccccence cones ccces concccencocceccccccoesd Geo Feat Device Read GPs Datal too GPS indo Flag Flag start i DAMeter_PLS fa 1112 am Under Survey there are several options If this is a new survey not a continuation of a previous survey tap once on New Survey The window shown below will appear ew survey x Enter New Survey Filename Cancel Step 4 Enter a filename for the Survey using the keyboard Note This is an important step as the filename is used to identi
49. ion and the currently indicated Location If you have selected a Trigger Mode CIS for example you cannot change to a Continuous Mode CIS without setting up a new survey You can however make other selection changes For example if you examine the pipe to soil voltage waveform prior to beginning a survey highly recommended and discover that the IR drop magnitude is quite small or there is considerable noise on the waveform you might decide to switch the voltmeter reading mode from On Off Pairs DSP mode to On Off Pairs Min Max mode Or in another case you might decide to change the Distance Per Reading interval from 2 5 feet to 5 0 feet for example To make setup selection changes tap on Survey Options at the top of the screen The screen will appear as shown below Surrey Start Known Station stat _ _ Location Dist Form Dist From GPS State Geo Fea Settings View Settings CtrHS Voltmeter Valdation Wave Ctrh Edit Survey Data Ctrl E Deete Last Reading Ctrl D Add Comments ctr o Restart Flags Ctrl M CtrHee HA DC 400 MOhm IGPS Data Log GPS Undo Flag FLag Ctrl F CER 10 51 AM To make allowed changes tap on Settings on the above menu tap on Change Global Settings and proceed to make any desired changes To simply view your Set Up selections you can tap on
50. k cable with 3 pin plugs on either end connects the hip pack or the back pack with the counter unit Two of the wires carry the wire measure signal and the third wire connects to the structure pipe via the trail wire The structure can be connected to either the positive or the negative side of the data logger s voltmeter by connecting a banana plug cable from the 77 counter unit to either the red or the black banana plug terminal on the data logger By connecting this cable to the red banana plug terminal positive side of the voltmeter and using two black band cables to connect the data probes to the data logger via the dual probe adapter effectively connecting the data probes to the negative side of the voltmeter you would read negative pipe to soil voltages This situation is illustrated in Figure 1 If you wanted to read positive pipe to soil voltages you would connect the banana plug cable from the counter unit to the black banana plug terminal on the data logger and you would use two red band data probe cables Option 2 Automatic Triggering Figure 2 illustrates the cabling configuration for this option A trigger cable is connected from the counter unit to the 5 pin terminal on the data logger as shown in the figure The red and the black wires of the trigger cable are connected to the External Beeper connection terminals on the underside of the counter unit The red and the black wires connect to the terminal
51. ly for use in CIS measurements see Section III 3 step 6 Threaded Plastic Cap Connection to Data Logger O Ring Seal _ Pure Copper Rod Saturated Copper Sulphate Solution Excess Copper Sulphate Porous Plug Crystals Push Button a i 50 i Switch a m Extension y 1 be Cane Handle Reference Electrode Top Termmal for Data Plastic Tube Logger Connection Figure 2 MCM s Reference Electrode As can be seen in Figure 2 the reference electrode consists of a pure copper rod that is immersed in a saturated copper sulphate solution within the body of the electrode The copper rod connects electrically to the negative terminal of the data logger During operation the porous plug is saturated with the copper sulphate solution and it is the solution saturated plug that makes actual electrical contact with the soil not the copper rod itself It should be noted that the copper saturated copper sulphate solution combination within the body of the electrode is actually a half cell with a built in half cell potential voltage Consequently when the data logger is connected between the reference electrode and the pipe as shown in Figure Section I the observed voltage reading is actually a combination of two voltages the copper copper sulphate half cell voltage a constant voltage and the pipe to soil voltage variable depending on corrosion conditions Therefore if it can be assumed that the
52. n in the following screen 51 Waveform Untitled Display Mode 1 012 On off x On Time ms Fo Dff Time ms Bo 0 596 aj voltage Ranga ai OO Sec 1 00 Sec m 5 7 DC 400 MONM X Notes View Data Save Load 0 00 Sec 1 009 Volts Exit As can be seen from the above screen the voltage reading is High for 0 7 sec and Low for 0 3 sec which was the prescribed cycle for the rectifier current in our example It can also be noted by examining the above pipe to soil voltage waveform that the transitions from High to Low and from Low to High readings are quite sharp as opposed to being step like This means that all rectifiers having an affect on this section of pipe are being switched ON and OFF ina synchronized fashion which is the ideal case To record this waveform tap once on the save button on the above screen The Save As window shown below will appear on the screen me aaaex aci Jasd C bcb devg WBchs Test F REA 52 You are being asked here to establish a file in which the waveform data will be stored saved The name of this file will be the name you type into the Name box on the above screen For ease of future retrieval when you have uploaded your survey data to the Data Management software package ProActive see Section VI it is recommended that you use the same name as your survey filename with the additi
53. n every time the right hand cane button is triggered If you recall we also set things up so that when the left hand cane s push button is pressed triggered we would record the location of survey flags which are typically placed at 100 feet intervals down the length of the pipe In this case triggering the left hand cane would have the same effect as tapping once on the Flag button on the survey screen Consequently when you encounter your first survey flag and trigger the left hand cane the DA Meter s software will assume that you have traveled a distance of 100 feet from the starting test station A flag is considered a Known Station At this point the screen will appear as shown below 57 EARE x station 4 00 0 1 01 03 E i500 ananasa Dist From L 0 9000 Ee eee rs Dist From eee axteienes amend Known station Range 5 7 V DC 400 MOhm f 0500 povw sss ners F Geo Feat Device Read iPS Dat Log GP undo Flag Flag Notice that the station number is now 1 00 0 The 1 represents 100 feet so the DA Meter assumes that you are now 100 feet from your reference zero location Notice also the F marker on the graph for Flag If you continue on down the pipe triggering voltage recordings using the right hand cane s push button until you encounter the next survey flag and you then press the left hand cane s push button to register this second survey flag the screen will app
54. n of Maximum Acceptable Difference between Far and Near Ground Readings When you are reconnecting the trailing wire from one test station to another test station further down the pipeline the last voltage recorded prior to breaking the connection with the first test station should be recorded as a Device voltage After tapping on the Device button on the survey screen and selecting Reconnect follow the predetermined voltage recording procedures for a Reconnect The specific procedures for a given Device such as a Reconnect will have been scripted via the software The voltage recorded prior to disconnecting the trailing wire will be considered the FAR Ground reading since you will be FAR perhaps a mile from the first test station Once the reconnect has been made at the second test station you will be prompted to make a new voltage recording This new voltage recording will be considered the Near Ground reading since you are standing very NEAR to the second test station By tapping once inside the field marked Max acceptable Far and Near Ground Reading Difference the number indicated in the above case the number shown is 5 can be changed to any value desired by pressing the delete DEL key on the keyboard and typing in a new number 29 If for example the number 5 is entered in this field it means that the maximum allowable difference between FAR and NEAR
55. n tap once on the Next button The screen shown below will appear Sinale Test Station Pipe To Soil nte Reading Mode ON OFF Reading Range 5 7 DC 400 MOhm i on 4 0103 ON R Accept gt OFF 0 9000 v Voltmeter Read Previous Save gen active Cancel As shown above the High and Low voltage readings measured at the starting test station will be displayed on this screen You have the option at this point to tap once on the Accept button and then once on the Save button to record the data at the first test station As an alternative you could press the trigger button on either your right hand or left hand cane reference electrode to record the data assuming that you selected the accept save option for the canes at D C P s see Section III 3 Step 7 Saving the first test station voltages will bring you back again to the Survey screen You are now ready to proceed with the CIS V 4 How to Perform a CIS In order to illustrate some of the important processes associated with performing a CIS we have designed a fictitious section of pipeline and the steps outlined below with regard to conducting a CIS pertain to this fictitious section Our 350 feet long section of pipeline is shown below in Figure 6 54 TS2 Asphalt Road 2 40 0 2 70 0 to 2 90 0 TS1 Flag Flag Flag 0 00 0 1 00 0 2 00 0 3 00 0 valve 3 50 0 Buried Pipeline Figure 6 Fictitious Section of Pipeline
56. ner and Counter Unit for Close Interval Survey Applications The following section describes how you would make appropriate connections in order to incorporate the MCM chainer wire measure and counter unit for CIS applications When properly configured the counter emits a short audible signal beep each time 2 5 feet or 1 meter for the metric version of trail wire is fed through the chainer A longer beep is emitted each time 100 feet or 100 meters for the metric version of trail wire is fed through the chainer An operator can then trigger readings or designate survey flag locations in response to the audible signals using the push button switches on the MCM data probes This represents the manual triggering option An alternative approach is possible which is known as the automatic triggering option In this case readings are triggered automatically each time 2 5 feet or 1 meter for the metric version of trail wire is fed through the chainer There are two possible mounting scenarios for the counter display unit and in each case it is possible to use manual triggering or automatic triggering Consequently there are four possible cabling configurations and each of these configurations is described below Counter Display Unit Mounted Separately on Data Logger Tray Option 1 Manual Triggering Figure 1 illustrates the cabling configuration for this option As can be seen from the figure a 3 wire cable coiled blac
57. ng mode application Step 29 Select Voltmeter Range and Input Impedance By tapping on the pull down list arrow button in the Range field you can select the voltmeter range and input impedance settings for your application The recommended settings for the voltmeter for CIS are 5 7 Volts DC full scale and an input impedance value of 400MOhm These settings provide a relatively fast response time 80 ms which is important in rectifier current interrupted applications Also a 400MOhm input impedance setting eliminates reading errors associated with any high source resistance measurements Note Caution has to be exercised if any of the ranges beginning with the number 4 for example 4V 400mV or 40mV are selected for CIS applications since these represent relatively slow response settings Such settings provide a higher level of AC filtering but at the expense of speed of response Rather than the response time of 80ms for the 5 7V range these settings have a response time greater than 1 second Consequently such settings are not appropriate for fast current interruption cycles ie interruption On and Off times shorter than 1 second as true On and Off potentials would not be recorded Step 30 Pull Up Active Survey Screen Tap once on the OK button on the Voltmeter Setting screen or the GPS Settings screen which will pull up the Survey screen shown below 44 Survey Survey Options Help x Location
58. nnected to this terminal via the dual probe adapter Again the reference electrodes are effectively connected to the negative terminal of the voltmeter with this connection Consequently the black banana plug terminal Terminal 4 is not used when push button canes are employed The red positive banana plug terminal for connection to the hip pack is shown as Terminal 3 This will establish connection to the positive terminal of the voltmeter Terminal 5 is a GPS Accessory terminal A GPS receiver capable of outputting NMEA data such as a Trimble Pathfinder unit or the MCM unit would be connected to Terminal 5 9 pin terminal Terminal 2 is currently earmarked for future use Finally Terminal 5 is also used after performing a CIS and removing the NMEA GPS receiver if used to connect a serial data communication cable to a PC in order that the survey data recorded by the DA Meter can be uploaded to a PC See Section VI for a discussion on how to transfer upload CIS data to a PC for data management 49 SECTION V HOW TO PERFORM CLOSE INTERVAL SURVEYS V 1 How to Carry the Test Equipment During a CIS With the equipment connected as shown in Figure 4 and the DA Meter set up as described in Section III 2 you are now ready to perform a Close Interval Survey To make a pipeline survey more manageable MCM has developed a special harness which allows the DA Meter and the trail wire Hip Pack to be carried around the wais
59. nto the database management section of ProActive Click on the Go button 70 Step 7 Examine the Survey Data Prior to Bringing the Data into the Database Management Section of ProActive You will have actually completed the process of copying a survey file to a local folder on your PC by this point using the Driver in ProActive However before exiting the Driver it is recommended that you examine your survey data prior to bringing the data into the Database Management Section of ProActive The process of bringing survey data into the database management section of ProActive is detailed in the ProActive Training Manual To do so click on the cancel button on the window that is currently showing Data Logger Get Pipeline Survey Window The DA Meter Driver window will again be shown but this time there will be a selection of tabs on the window labeled as follows Survey Settings Readings Device Readings Graph By clicking on these tabs you can view information on the Survey conditions or you can view actual survey data Example The EM 004 survey mentioned above is an actual survey that was performed on a buried pipeline It was a continuous mode CIS performed under High Low rectifier current interrupted conditions By clicking on the various tabs on the Driver window for this uploaded survey we can view either the survey conditions that were setup on the DA Meter prior to the survey see S
60. ny By tapping once on the GPS Type field pull down list arrow button on the Setup 2 of 5 screen the screen shown below will appear 30 Survey Survey Options Help w A x Max acceptable Far and Near Ground Reading difference 5 AC System ea Hz z Beep if below fo 850 ly my _ Differential GPS Required V Use GS for Altitude V Log GS at Flags INVES V Log 5 at DCP Feature Manual f a A 7 Pig DaMeter PLS to 3 04PM A 9999 Never Beep This selection pertains to a GPS receiver that can be connected to the DA Meter The GPS receiver can be called upon to log the precise location of Devices or Geographical Features that are encountered during a CIS As can be seen from the screen there are 4 choices for GPS Type None This means that a GPS receiver is not being used MCM This means that an MCM GPS receiver is being used NMEA This means that a GPS receiver other than the MCM receiver that is capable of outputting NMEA data is being used Manual This means that location data will be entered manually when the GPS button is pressed on the survey screen during a CIS Select the appropriate choice by tapping once on your selection Step 14 Select GPS Options On the far right hand side of the Setup 2 of 5 screen as shown above there is a group of boxes associated with a GPS accessory If a GPS accessory has been selected for use with the DA Meter for a particular CIS all
61. ny seconds as prescribed voltage recordings while the other cane button is selected to register survey flag locations flag pause or pause flag Alternatively both cane buttons can be selected to register flags or to affect pauses The pause cane would also act as the start or restart cane Cane Button Functions At Device Locations Devices are defined as specially identifiable entities that exist along the length of the pipeline Examples of Devices include rectifiers test stations valves etc For both CIS modes Trigger and Continuous a cane button function selection selection will apply to both left and right canes has to be made with regard to Data Collection Points see D C P field in above screen A Data Collection Point is a Device location point In this case there are 3 choices None Accept and Accept and Save Your selection is made by tapping once in the circle beside your choice If none is selected Pressing a cane button will do nothing In this case you would have to tap the accept and then save buttons on the screen having previously tapped the device button if you wished to read and record the voltage data at the Device location If accept is selected Pressing a cane button has the same effect as tapping the accept button on the Device Readings screen If accept and save is selected Pressing a cane button has the
62. of 5 Voltmeter Setting Read Mode Sma 5 7 YDOC 400 Mohn aeua Settings Off 00 Astat peoameter pis jet 10 14 am E Again you would make your selection of ON and OFF cycle times Also in this case you would tap on the GPS Settings button which would bring up the screen shown below Survey Survey Options Help Setup 5 of 5 Voll GPS Sync OnjOff Settings On Delay 150 Lng 4 GPSPort comi gt ON OFF Cycle sec Off Delay mg GPS Type mcm K Downbeat Each Minute NM cyce Start On gt Off Astat i DaMeter_PLs Fee 9 30 Pu You are being asked here to make several selections Read Mode First select the type of GPS unit you will be using currently only the MCM GPS unit can be used in the GPS Sync voltage reading mode 42 Next enter your On Delay and your Off Delay selections by tapping in the appropriate field and typing in the requested delay time in milliseconds These delay times are employed so that any spiking in the voltage waveform that might occur as the rectifier current is switched from ON to OFF and from OFF to ON does not become a factor in the voltmeter s determination of the true ON and OFF voltage values for each CIS measurement For example if 150 ms was selected for the Off Delay the data logger would record the voltage value sampled 150 ms after the rectifier current was switched from the ON to t
63. of a particular pipeline taking the IR drop into account a CIS can be performed to monitor the condition of the pipe by comparing the pipeline potential profile recorded with the ideal case scenario which would be a uniform constant potential along the length of the pipe The following two sections Sections I and III describe the setup procedures and operation of the reference electrodes and data loggers employed in MCM s Integrated CIS Test Equipment Package SECTION II MCM s REFERENCE ELECTRODE FOR CIS II 1 Background As illustrated in Figure 1 in the above section Section I the reference electrode makes physical contact with the ground soil and is connected electrically to the negative terminal of the data logger digital voltmeter data storage unit Since the reference electrode is an integral part of the electrical circuit that is allowing the data logger to measure the potential difference between the pipe and the soil the reference electrode must make good and consistent electrical contact with the soil at each measurement point during a CIS The industry standard reference electrode for pipe to soil measurements is the copper copper sulphate half cell or as it s more commonly referred to as the copper sulphate reference electrode A schematic illustration of an MCM copper sulphate reference electrode is shown in Figure 2 Also shown in the figure is the reference electrode attached to a push button cane assemb
64. on Data Logger Connections for Manual Triggering of Readings Using Data Probe Push Buttons Structure lead shown as wired to POSITIVE for negative pipe to soil readings using black band data probe cables 83 Trail Wire 3 pin terminal Chainer Test Station Hip Pack or Back Pack Counter Display 3 pin Trigger terminal Cable Banana Plug Prongs Banana Plug Terminals DATA LOGGER Figure 4 Counter Display Unit Mounted Directly on Data Logger Connections for Automatic Triggering of Readings Banana plug cables not included with package are connected to the data probes MCM data probe cables are not used Also structure lead shown as wired to POSITIVE for negative pipe to soil readings 84 APPENDIX 2 How to Delete Survey Files from the DA Meter Once you have copied your survey files to your PC see Section VI you can if you wish delete the files from your DA Meter s CompactFlash memory card if you need for example to create space in the data logger s file storage memory to make room for future survey files Your survey files are stored in the DA Meter on a non volatile CompactFlash card Since this memory is non volatile your survey data will be safe even if all power is lost to your DA Meter Please note however that the DA Meter s program files the files that actually run the DA Meter are stored in a volatile memory and so if all power was lost ie
65. on of something like Wave TS 1 to the file name This would represent the waveform data recorded at Test Station 1 at the beginning of your survey You should then tap once on the OK button This process will save the waveform data in the DA Meter s CompactFlash memory in the DA Meter_DATA folder for future reference Tap once on the Exit button on the waveform screen and this will bring you back to the survey screen V 3 How to Record the Voltages at a Starting Test Station At this point it is recommended that you record the ON OFF voltages at the starting test station This will represent the first Device on this survey To do so tap once on the Device button on the survey screen The Device Readings screen shown below will appear Note An additional device named Mark DC VG will be available for selection if the box labeled DCVG Sidedrains in CIS Survey was checked off during initial survey set up Device Readings Reconnect Single Test Station ine Crossing wy No Bond _ine Crossing wi Bord ine Casing Test Staticn Corsumer Purciase Sales Tap POD R Drop Coupon z Ctstion Binale Test Station C Known Station Astat peDsmeter_PLs 3 24am A Pi DaMeter 53 As can be seen from the above screen you can choose from a number of Devices In this case you would tap once on Single Test Station to highlight this selection You should the
66. on on your hard drive in the field underneath 69 This is the folder that you set up previously in which to save all of your survey files copied from your DA Meter If you named the folder Surveys the folder s location would be C Surveys EE DA Moter Driver Pipeline Survey Data Type Pipelre Survsp GetPLS from DAM ete Surveys If you have akeady moved your survey dala lo the desktop computer check Use Local Folder aed sect the folder where il s located M Use Local Folder Copy To Local Folder CASurveys fe mank devg lt s t3 EMDCYG 04 ML2TK 6 17 03 2594 78 2 n irank2 Refresh Connecton ONEOK 4062 03 29 04 EM LINE 1 001 lesb Select the survey to upload then click on Go Go Ready Version 1 5 6 9 Mrimum DAMeer Version 1 0 7 As an example the Driver window would appear as shown above if the file named EM 004 was selected for copying to your PC and if the folder to which the survey file was to be copied was named Surveys on your hard drive Of course the actual survey file names appearing in this field will depend on the filenames of the surveys that have been performed using your own DA Meter In our example the Driver will have located survey file EM 004 in our DA Meter s memory and when the Go button on the Driver Window is clicked the survey file named EM 004 will be saved on our PC s hard drive at which time the survey data could be brought i
67. on the survey data If you have the ProActive software program installed on your PC or you can bring your DA Meter to a PC that has ProActive installed on it you can use the ProActive program to automatically access survey files on the DA Meter If either of these situations applies you would proceed to Section VI 3 Note The ProActive software program is required to actually view and analyze the survey data If you do not have the ProActive software program installed on your PC and you cannot bring your DA Meter to a PC that has ProActive installed on it you can copy survey files manually from your DA Meter to your PC and you can subsequently send the copied files to a recipient that has ProActive installed on their PC If this situation applies you would proceed to Section VI 2 Note In order to copy survey files from your DA Meter to your PC either manually or via ProActive you will need to have the Microsoft ActiveSync software program installed on your PC VI 2 The Manual Approach Step 1 Connect a serial data communications cable between the DA Meter s 67 9 pin communication terminal see Section IV 2 Figure 5 and the serial data communications port on your PC and switch on your DA Meter With Microsoft s ActiveSync program installed on your PC the ActiveSync window will appear on your desktop and the program will confirm that two way communication has been established Step 2 Follow the procedures det
68. ontrol the current switching timing on all participating rectifiers simultaneously Such GPS Receiver Current Interrupter Switches are available through MCM This type of current interrupted method is known as a GPS Satellite Synchronized High Low CIS mode Figure 2 shows an illustration of a CIS being performed using GPS satellite synchronization of rectifier current interrupter switches Again the ON OFF current switching cycle would be synchronized for all rectifiers having an affect on the pipeline section being surveyed 26 3 GPS Satellite s synchronization Rectifier a Test station Figure 2 A GPS satellite synchronized high low CIS mode illustration Of course a CIS can be performed with rectifiers permanently ON current permanently flowing in the soil during measurements and this method is known as a Non Interrupted CIS mode since in this case the rectifier current is non interrupted Finally a CIS can be performed with rectifiers permanently OFF which could be the case for example if a potential profile is desired of a depolarized pipeline ie a pipeline whose polarization potential has had a chance to fully dissipate Under such conditions however the pipeline would not be cathodically protected 27 Rectifier Mode Selection By tapping once on the pull down list arrow button in the Rectifier Mode field on the Setup 1 of 5 screen the screen shown below will appear Survey Survey O
69. ou are performing a High Low current interrupted CIS it is recommended that you examine the pipe to soil voltage waveform at your starting location starting test station and it is suggested that you make a recording of this voltage waveform using your DA Meter The nature of the voltage waveform that you are examining will reflect the nature of the rectifier current waveform that is currently in effect on your pipeline With at least one of the two reference electrodes making good electrical contact with the soil above the pipe at the first test station and a test cable connected from the test station to the red banana plug terminal on the DA Meter the cable connection to the Hip Pack will be temporarily disconnected you will see voltage readings displayed for the ON and the OFF portions of the current interrupted waveform cycle for each cycle see screen shown below for a snap shot To examine the ON OFF pipe to soil voltage waveform tap once on the WAVE button on the menu bar at the top of the Survey screen Alternatively tap on the Survey Options button and then tap on Wave The screen shown below will appear Waveform Display Mode On Off Dn Time ms fon off Time ms 300 2 voltage Range 5 7 V Dc 400 MOhm Notes 4 By tapping once on the Read button on the above screen you can view the actual ON OFF voltage waveform A typical waveform would be as show
70. ption This option is similar to Option 1 accept that in this case the counter unit is mounted directly on the data logger via the banana plug prongs on the counter unit In this case an external banana plug cable is not required between the counter unit and the data logger to make connection to the structure pipe Instead this connection is made via the internal wiring in the counter unit The structure pipe lead inside the counter unit can be wired to the positive or to the negative side of the voltmeter In the illustration shown in Figure 3 the structure lead is wired to the positive side of the voltmeter which means that you would read negative pipe to soil voltages when using the black band data probe cables connected to the data probes If you wanted to read positive pipe to soil voltages you would connect the structure pipe lead inside the counter unit to the negative side of the voltmeter and you would use two red band data probe cables to connect to the data probes Note The counter unit comes with the structure pipe lead pre wired to the negative side of the voltmeter however by opening up the unit you can change the connection to re wire the structure to the positive side of the voltmeter for negative pipe to soil readings Option 4 Automatic Triggering Figure 4 illustrates the cabling configuration for this option This option is similar to Option 2 accept that in this case the counter unit is mounted direc
71. ptions Help w A x Survey Type Trigger CIS Rectfer Mode SW L Use Metric Cane Buttons Allowed To Aways ON D C P always OFF O None rSuryey Walking Direction accent Increasing Decteasng accent gt Save Cancel 22 AM As can be seen on the above screen there are 3 choices for Rectifier Mode Cycle ON OFF Always ON and Always OFF If Always ON is selected it will be assumed that the rectifiers affecting the line will be permanently ON which would be the case for example for a non interrupted CIS If Always OFF is selected it will be assumed that all rectifiers having an affect on the line will be permanently OFF at least for the duration of the CIS If Cycle ON OFF is selected it will be assumed that all rectifiers having an affect on the line have current interrupters installed and that their switching waveforms will be synchronized This would be the case for a High Low CIS Step 10 Tap once on the Next button The screen shown below will appear Setup 2 of 5 28 Setup 2 Of 5 Max acceptable Far and Near Ground Reading difference 5 AC System ec Hz I Beep it below 2993 v GPS Type NIVEA Ty _ Differential GPS Required 9999 Never B2 D cps port com 1 Tr Cu V Log GPS at Flags Auto Log GPS Every Reading Log GAS at DCP Feature Previous Cance Astat pm oameter_Pis fe 11 49 AM ral Step 11 Make Selectio
72. r that the DA Meter will record pipe to soil voltages when the canes are triggered the positive red banana plug terminal on the back of the DA Meter is connected as shown to the pipe via a spool of wire contained in a Hip Pack The connection to the pipe is made by hooking a cable from the red terminal on the DA Meter banana plug terminal to the banana plug terminal on the underside of the Hip Pack and connecting the trail wire coming out of the topside of the Hip Pack to the Test Station Electrode and therefore to the pipe A GPS receiver unit is also illustrated in Figure 4 Such a unit can be connected to the DA Meter in order that the position of items such as flags devices and geo features can be recorded during the performance of a CIS either manually by tapping on the log GPS button on the survey screen at each critical location or automatically by pre programming the DA Meter as described in Section III 2 Steps 13 and 14 IV 2 Howto Attach Cables and Accessories to the DA Meter The terminals on the back of the DA Meter for the various connections described above are illustrated in Figure 5 48 5 Pin Data Probe Connector GPS Connector Positive Terminal Negative Terminal 9 Pin Communication zh 7 Port th b WN m Figure 5 Connection terminals on rear of the DA Meter The 5 pin Data Probe Connector is shown above as Terminal 1 As discussed above the reference electrode canes are co
73. reference electrode half cell voltage is fixed a constant value any variation in the voltage measurements recorded during a CIS can be assumed to be due to variations in pipe to soil potential and therefore due to the external corrosive condition of the pipe in the various measurement areas The industry standard voltage value of 0 85 Volts discussed in Section I 3 which represents a minimum pipe to soil potential difference for adequate protection against corrosion is actually a combination sum of the reference electrode half cell voltage and the pipe to soil voltage Consequently since so much emphasis is placed on this critical voltage value it is imperative that the reference electrode be set up operated and maintained appropriately so that its half cell voltage value will in fact be fixed II 2 How to Prepare Reference Electrode for Use The reference electrode will arrive from M C Miller Co Inc MCM assembled but without liquid in the plastic tube There will however be a concentration of blue copper sulphate crystals inside of the transparent plastic tube To prepare the reference electrode for use the transparent plastic tube should be unscrewed from the threaded cap copper rod assembly by turning the plastic tube counter clockwise with respect to the threaded cap copper rod assembly and the tube with the copper sulphate crystals at the bottom should be filled up to about 1 2 inch from the bottom of the thr
74. rigger cable part SIN024 for automatic triggering of readings in conjunction with the wire chainer counter unit In contrast with the Continuous CIS mode the timing of when voltage recordings will be made is preset For instance if you select 1 second intervals voltage recordings will be made every second Consequently the operator must synchronize his cane repositioning pace to match the preset voltage recording timing Step 7 Select the function operating mode of the cane buttons associated with the two reference electrodes canes to be used in the CIS Selections are made by tapping choices in the D C P and Survey fields shown in the Step 5 screen above 19 The function of the cane buttons during regular survey measurements is determined by the selection made in the survey field while the selection made in the D C P field determines the function of the cane buttons when measurements are made at specially identified locations devices Cane Button Functions During Regular Survey Between Devices The functionality available for the cane buttons depends on the survey mode selected in Step 6 Trigger mode or Continuous automatic mode If the Trigger CIS mode is selected the screen will appear as shown below Survey Survey Options Help i lk x Survey Type Trioger AS Rectifier Mode Cycle ON OFF 7 O Use Metric Cane Button s Allowed To accent p Increasing O Deci
75. s When properly connected with reference electrodes as described in Section IV a data logger reads and records pipe to soil voltages with respect to a reference electrode at each of the measurement locations along the length of the pipeline typically every 2 5 feet for CIS work The particular data logger described here is the so called DA Meter This data logger is a combination of a high input impedance digital voltmeter and a handheld Personal Computer PC The operating system of the PC is Windows for Handheld PC 2000 and MCM has designed proprietary application software programs in order that the DA Meter can be employed to run both Scripted Site Surveys and Pipeline Surveys such as CIS DCVG and Surface Potential Surveys Your DA Meter data logger will arrive from MCM with the Windows operating system and our survey application programs installed The survey application programs will remain installed unless the main battery pack and its backup are allowed to fully discharge in which case the application programs will have to be re installed see your DA Meter User s Manual However your survey data will always be safe regardless of battery status as these data are stored in a non volatile memory CompactFlash Card The particular application software program required to run Close Interval Survey CIS applications is called the DA Meter PLS Pipe Line Survey program and the use of this program is described b
76. s labeled positive and negative respectively Again as in Option 1 the structure pipe can be connected to either the positive or the negative side of the voltmeter by connecting a banana plug cable from the counter unit to either the red or the black banana plug terminal on the data logger By connecting this cable to the red banana plug terminal of the data logger positive side of the voltmeter as shown in the figure the data probes would be connected to the negative side of the voltmeter via the black banana plug terminal on the data logger In this case you would read negative pipe to soil voltages If you wanted to read positive pipe to soil voltages you would connect the banana plug cable from the counter unit to the black banana plug terminal on the data logger and you would connect the data probes to the red banana plug terminal on the data logger Note With this option Option 2 you do not use the MCM data probe cables Instead you would connect banana plug cables not supplied with the package to the banana plug terminals on the data probes and via a common connection you would connect both banana plug cables to either the black or the red banana plug terminal on the data logger depending on whether you wanted to read negative or positive pipe to soil voltages see above 78 Counter Display Unit Mounted Directly on Data Logger Option 3 Manual Triggering Figure 3 illustrates the cabling configuration for this o
77. se Reference Electrode in CIS Measurements In order to proceed with CIS measurements remove the protective cap from the porous end of a properly setup prepared MCM reference electrode see Section II 2 for preparation instructions Place the reference electrode porous plug side down on the ground over the pipe at the first measurement location typically at a test station electrode The porous plug of the reference electrode suitably moist should be in firm contact with moist soil This may require digging in where the earth s surface is dry If the soil is particularly dry it may be necessary to moisten the soil around the electrode using fresh water to obtain good electrical contact The top terminal of the reference electrode is connected to the negative side of the data logger s voltmeter and the positive side of the voltmeter is connected to the test station electrode Note The specifics on cable hook ups are provided in Section IV For CIS work the reference electrode plastic tube assembly is attached to an extension rod Commonly know as a cane for upright handheld operation The cane handle houses a push button switch for triggering voltage recordings and other events and the terminal on the cane for electrical connection to the data logger is a 5 pin connector As discussed in Section IV the receiving terminal for the reference electrode on the data logger is also a 5 pin connector All electr
78. t DCP Feature If this box is ticked GPS position data will be logged automatically at Devices or Geo Features when either the Device button is tapped on the survey screen and a Device reading is logged or when the Geo Feat button is tapped on the survey screen and a geo feature is noted Auto Log GPS By tapping on the drop down menu button in the Auto Log GPS field the selections available will be displayed as indicated below 32 Survey Survey Options Help i A x Setup 2 Of 5 Max acceptable Far and Near Ground Reading difference Ye 5 AC System ec Hz I Beep it below 999 GPS Type NMEA k C Differential GPS Required 9999 Never Beep GPS Port com 1 I C Use GAS for Altitude mo V Log Gs at Flags As SIL V Log GPS at DCP Feature very Reacing Every 2 Readiry 3 Every 5 Reaciry Previous ee 10 Raadi v Cancel Astat preDameter_PLE O29 11 56 au Auto Log GPS By selecting one of these options you can elect to have the GPS position data logged automatically at every survey reading at every second reading at every fifth reading at every tenth reading or not at all never at survey readings Step 15 Tap once on the Next button The specific screen that will appear Setup 3 of 5 screen will depend on if you selected Trigger CIS mode or Continuous CIS mode back at Step 6 and whether or not you selected Metric units
79. t area in a hands free fashion allowing the individual to be able to position the reference electrodes canes over the pipeline every 2 5 feet or so in an alternating manner and to be able to trigger the push button canes when appropriate to do so With the harness assembly the DA Meter sits on a tray at waist level allowing the operator to view the screen at all times and to make any selections required by tapping on the screen Also the dual probe adapter shown in Figure 4 is attached to the underside of the tray allowing convenient 5 pin cable connection of the adapter s output to the DA Meter Again this will effectively connect both data probes reference electrode canes to the negative terminal of the voltmeter The Hip Pack which contains a spool of copper wire trail wire typically 1 mile or 3 miles in length is attached to the waist belt of the harness and as described in Section IV 1 a cable connects the banana plug terminal on the underside of the Hip Pack to the red positive banana plug terminal on the DA Meter Typically the Hip Pack sits on the operator s left hand side at waist level In addition a GPS receiver unit together with its battery pack and antenna can also be attached to the waist band of the harness typically on the operator s back at waist level with the antenna rising to above head height 50 V 2 How to Examine and Record a High Low Voltage Waveform When y
80. t hand cane reference electrode assuming that both canes have been set up to read voltages see Section HI 3 Step 7 There are several advantages to using a pair of canes reference electrodes rather than a single cane a single reference electrode for CIS For example both canes can be used to record pipe to soil voltages in an alternating fashion one after the other as the operator walks down the length of the pipeline In this fashion the operator can establish a rhythm very much like a cross country skier contacting the soil above the pipe every 2 5 feet by triggering the left hand cane then the right hand cane then the left hand cane etc etc Also one of the canes for example the left hand cane could be used to register the location of survey flags which are typically located every 100 feet down the length of a pipeline With this arrangement the right hand cane would be used to record pipe to soil voltages every 2 5 feet while the left hand cane would register survey flags This methodology has the advantage of periodic checks on the operator s location with the DA Meter s software being able to re establish starting points every 100 feet survey flag separation A critical requirement with regard to using reference electrode pairs is that the two electrodes canes be essentially identical As discussed in Section II 1 a copper copper sulphate reference electrode is a half cell with a built
81. tly on the data logger via the banana plug prongs on the counter unit The trigger cable is used in this option and is connected as described in Option 2 Again an external banana plug cable is not required between the counter unit and the data logger to make connection to the structure pipe with this option Instead this connection is made via the internal wiring in the counter unit In the illustration shown in Figure 4 the structure lead is wired to the positive side of the voltmeter which means that you would read negative pipe to soil voltages with the data probes connected to the negative side of 79 the voltmeter as shown As with Option 3 the structure pipe lead inside the counter unit can be wired to the positive or to the negative side of the voltmeter If you wanted to read positive pipe to soil voltages you would connect the structure pipe lead inside the counter unit to the negative side of the voltmeter and you would connect the data probes via banana plug cables to the positive side of the voltmeter Note With this option Option 4 you do not use the MCM data probe cables Instead you would connect banana plug cables not supplied with the package to the banana plug terminal on the data probes and via a common connection you would connect both banana plug cables to either the black or the red banana plug terminals on the data logger depending on whether you wanted to read negative or positive pipe to
82. tton and saving the reading or the flag button respectively Automatic Triggering of Readings When the trigger cable part SINO24 is used in conjunction with the wire chainer counter unit the trigger cable signal simulates the action of the left hand red handled data probe push button while the right hand green handled data probe push button is disabled has no effect Consequently in this case it is important that the left hand data probe push button be designated as a read button while the right hand push button can be designated as either read or flag again the right hand data probe push button is not a factor The appropriate selections would be read read or read flag In this case survey flags can be designated by tapping the Flag button on the survey screen If Continuous CIS mode is selected the screen will be as shown below Survey Survey Options Help vif OE x Survey Type Continuous cds j Rectifier Made Cycle ON OFF gt C Use Metric Cane Button s Allowed To D C P None Survey Walking Direction Atoni Increasing Decteasng accent gt save z Cancel 21 The 4 choices for the set of two canes in the Continuous CIS mode are revealed in the Survey field by tapping once on the pull down list arrow The 4 choices are shown in the screen above In this case one of the cane buttons can be selected to effect a pause in the continuous automatic every so ma
83. vey None Left Right Survey Walking Direction Oa F DEAS l lag Read Ircreasing O Decteasing accent gt Save cat once during iritial setup Cancel BigDaMeter PLS Dd 11 20 f Step 6 Select Survey Type For CIS measurements there are 2 options for type of survey Trigger CIS and Continuous CIS Other survey types are available as can be seen by tapping once on the pull down list arrow button in the Survey Type field as shown below Survey Survey Options Help i lk Rectifier Mode Cycle ON OFF _ Use Metric Survey Walking Direction O Accent Flac 5 Ircraasing Decreasing Accent gt Save Cancel Astat peoameterPis Poa k As can be seen from the above screen DCVG combined DCVG CIS and Surface Potential Surveys are available for selection however for CIS Only surveys either Continuous CIS or Trigger CIS should be selected by tapping once on the selection In Trigger CIS mode voltage recordings are triggered by the operator pressing on the push button switch located on top of a reference electrode cane data probe while making electrical contact with the soil above the pipe with the copper copper sulphate half cell end of the cane Consequently in this survey mode the operator is in control of the timing of when voltage recordings are made as a CIS is conducted Note The Trigger CIS mode should also be selected when using the t
84. voltage recordings has been set at 5 otherwise an error window will be displayed on the screen If the FAR and NEAR voltage recordings are within 5 in this case of each other there will be no error message If on the other hand the recordings differ by more than 5 an error window will appear on the screen The error window will indicate 2 options Option 1 Retake Near Reading Option 2 Accept This Error By selecting Option 1 you have the chance to make another recording at the second test station which would be compared to the stored FAR Ground recording If this voltage difference is lt 5 there will be no error message By selecting Option 2 you will be choosing to ignore the difference in the recordings and move on with the survey Step 11 Set Local Electricity AC Frequency By tapping once on the AC System field pull down arrow button on the Setup 2 of 5 screen shown above you will have the choice of 60Hz or 50Hz AC Select 60Hz for all U S applications Step 12 Select Beeping or Alarm Voltage By tapping once in the Beep if below field on the Setup 2 of 5 screen a voltage value can be entered for example 0 850 With this value entered the DA Meter will beep to alert you to the fact that a voltage reading lower than 0 850 Volts has been made This would be a location that you might want to check again and mark if the lower reading persists Step 13 Select the GPS Receiver Being Used If A
85. ween pipe and soil would be 0 85 Volts Any more positive less negative voltages for example 0 7 Volts would suggest insufficient cathodic protection and would indicate a location where external corrosion might be taking place Actually a potential difference of greater than 0 85 Volts for example 1 0 Volt or higher might be required to be in the safe area with regard to a pipeline being fully cathodically protected under current flow conditions particularly if the amount of ionic current flowing in the soil from the anode to the pipe is large This situation would result in a significant so called IR drop voltage drop due to the current flow in the soil which must be added to the minimum 0 85 Volt potential difference to ensure sufficient cathodic protection As is discussed in Section III it is possible to determine the magnitude of this IR drop voltage during the performance of a CIS by conducting the CIS measurements in the High Low or current interrupted mode where the pipe to soil potential is sampled as the current is switched ON and OFF in a cyclic fashion see Section III The critical pipe to soil potential with regard to ensuring sufficient cathodic protection would be the potential measured during the current OFF part of the cycle since in this case the IR drop would be eliminated In any case once a critical pipe to soil potential difference has been established for sufficient cathodic protection

CIS Training Manual – DA Meter Version

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CIS Training Manual &ndash; DA Meter Version

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CIS Training Manual – DA Meter Version