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“GATHERER ONE” DATA-LOGGER USER`S MANUAL

1. Today screen in the case of the Q100 units and the desktop screen in the case of the Q200 units The startup screens for the Q100 and the Q200 units are illustrated below 57 Q100 Units Monday June 06 2005 FE Tap here to set owner information Q200 Units 4 Fs Recycle Bin Giss i e ZIPS G1GPS Internet Explorer a AP G1PLS My Documents Step 2 In the case of the Q100 units tap on the Start button on the Home screen This will pull up the main menu 58 Step 3 In the case of the Q100 units tap on the G1 PLS button on the main menu In the case of the Q200 units double tap on the GIPLS icon on the desktop or tap on the start icon bottom left hand corner of desktop tap on the Programs button and tap on the G1PLS button In either case Q100 or Q200 units the survey screen shown below will be displayed Note In the case of the Q200 units the menu items are arrayed along the top of the screen EJ G1_PLS 9 20a FLag Y Undo Flag GPS Data v Dist From Flag Geo Feat 0 500 Device Read 0 000 ui alls Survey Options Help VM yS Ej Step 4 Tap on Survey in the menu bar along the bottom of the above screen The screen shown below will appear 59 Dist From Flag Lon New Survey Ctrl N Continue Previous Survey Ctrl C Finish Survey Ctrl F Exit Ctrl X Survey Options Help VM y5 i Under Survey the
2. In the case of both the Satellite and Beacon systems you would be required to make additional selections to suit your needs Please refer to the Trimble Pathfinder manual for additional details Step 10 Connect the GPS Pathfinder Controller software to the receiver unit by 190 clicking or tapping on GPS and selecting Connect By doing so your settings will be sent to your GPS receiver unit to configure its operation Step 11 Disconnect the GPS Pathfinder Controller software from the receiver unit by clicking or tapping on GPS and selecting Disconnect Your GPS Pathfinder receiver will save your settings in its memory until you decide to re configure the unit You are now in a position to connect a suitably configured receiver to the G1 unit and to perform surveys involving the tagging of readings with GPS position data e How to Connect a Configured GPS Pathfinder Receiver to the G1 When you ve configured your GPS receiver either via your PC or via your G1 and are ready to conduct a survey you would connect your receiver to the G1 via the COM 4 Port on the G1 which is the 26 Way Mini D terminal on the bottom right hand side of the G1 as you face the screen This would be the case if you selected the COM 4 Port during the survey set up procedure as recommended at which time you would also have selected NMEA for the GPS Type You will require a special cable G1
3. By tapping on the Goto Site button on the Survey Info screen the Site Info screen will come up for the selected highlighted site The order that the sites should be examined on the route has been established in ProActive and corresponds to the list shown above ie the first site to be examined in our example route is the SU11 Exposed Pipe site The second site to be examined is the SU11 Above Ground site and so on 130 When all of the prompts see below have been completed for a particular site the Prompt List for the next site in the batting order will come up and this process is continued until all sites on the route have been examined Valve Example The Site Info screen for the SU11 Valve in our example route is as shown below U11 Valve Station No 580 80 Mile Post 11 000 Desc Franks Site via Batch Area Franks Area Pipeline xFMIN_Pipeline Pipe Depth 20 Lat N 5 12000 Long E 10 12000 Alt 15 GPS Data Driving Directions Prompt List E As can be seen from the above screen important information about the Valve site is presented here This type of information about a particular site is established on the ProActive side and it is downloaded to your G1 data logger in association with the scripted route If not previously established you can set the site location by logging GPS data at the site by tapping on the GPS Data
4. GPS field Also select COM4 from the adjacent drop down list After making your other selections on this screen tap on the Next button and proceed through the other setup screens An example setup screen is shown below G1_PLS 461153 Ok Max Far Near Diff Of AC 60 Hz v Low v Alarm 9999 9999 No Alarm GPS NMEA Com 4 X Auto Log GPs Every Reading L Differential GPS Required Use GPS for Altitude Log GPS at Flags Log GPS DCP Feature E Step 3 Switch on the GPS receiver The battery indicator on the GPS receiver should glow green permanently ON and the satellite indicator should flash ON green once per second when a stable NMEA output has been established The Bluetooth indicator should be OFF Step 4 Connect the GPS receiver to the G1 via the serial cable that came originally with the G1 black cable with a 26 way terminal on one end and a 199 9 pin female terminal on the other end Connect the serial cable to the COM4 port on the G1 which is the right hand port as you face the screen Step 5 View the GPS data on the G1 by tapping on the GPS Data button on the survey screen An example screen is shown below AJG PLS 4 12 00 Latitude N 27 647202 Longitude Y 80 414772 Altitude 40 feet Sat In Use 8 GPS Mode Standard GPS GPS Fix Time 15 59 51 PM View NMEA Data E Step 6 Exit the GPS Data screen which will return you to the survey sc
5. Single Read i e On Off Pair read modes are not appropriate since rectifier current interruption is not a factor Select the Range As can be seen by viewing the drop down menu in the Range field a number of selections are possible 106 The fastest response setting is the 5 7V 400MQ setting 80ms response time however the noise level on this setting is 5mV which could make small anomalies difficult to detect Lower noise level settings 1mV noise level can be selected such as the 40mV or 400mV settings to increase sensitivity however please note that the speed of response on these settings is around 1 sec Step 24 Pull up Active Survey Screen By tapping on the OK button on the Voltmeter Settings screen the active Survey screen would appear and you would be ready to proceed with your DCVG survey An example starting active Survey screen is shown below F ci_pis GF 4 4 07 amp Fla 2 mi rior GPS Data mv Log GPS station 94 0 0 Dist From Flag Geo Feat 5 500 a e a 2 Read 0 000 GPS Status Standard GPS Survey Options Help VM y5 E 107 As SP voltages are recorded by the G1 data logger the Distance From Start total distance from the start of the survey parameter will increase in increments of 5 0 feet or whatever the Distance Per Reading value was that was entered back at Step 16 Distances wou
6. To set up a programmed recording schedule tap on the Schedule button on your settings selection screen The screen shown below will appear 163 AJ start REFTER Ok Start Date 7 28 04 Stop Date 7 28 04 Daily Start Time 8 00 00 AM 5 Daily Stop Time 5 00 00 PM B Tue Fri _ Wed Mon _ Thu As can be seen from the above screen you can program the start date the day the recordings will begin and the stop date the day the recordings will end You can either tap on the arrows and select a date from the calendar or you can highlight tap on the numbers and use the keyboard to change these dates You can also select the daily start time and the daily stop time for the recordings For example the above screen indicates that we have programmed the G1 to record data on the 28th of July 2004 between the hours of 8am and 5pm You can also select to skip recording data on certain days of the week by placing a tick inside the appropriate check box associated with the day or days that you d like to skip in the Skip Days field For example if you are recording data over the course of several weeks but you are not interested in weekend days you could select to skip recording on Saturdays and Sundays To enter your programmed recording schedule tap on the OK button on the above screen 164 Note If your start time is more than 10 minutes away from the time you
7. i 4 Ej 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 field on the above screen For ease of future retrieval when you upload your survey data to ProActive it is recommended that you use the same name as your survey filename with the addition of something like Wave TS 1 to the file name This would represent the waveform data recorded at Test Site 1 You should then tap on the OK button This process will save the waveform data on the G1 data logger s CompactFlash memory card for future retrieval by ProActive Finally by tapping on the Load button on the Waveform screen a list of previously saved waveform files can be viewed and these files can be opened by tapping on the file name 118 SECTION IV USING THE G1 DATA LOGGER TO PERFORM SCRIPTED SITE SURVEYS IV 1 Introduction In addition to being used for pipeline survey applications as discussed above in Section III the G1 data logger is also designed to be employed in the performance of Scripted Site Surveys Site Surveys are typically performed either on an annual basis or on a bi monthly basis and involve collecting data at specific sites or devices associated with a pipeline system such as test stations rectifiers valves etc The term Scripted is used to describe a site survey involving a rou
8. GATHERER ONE DATA LOGGER USER S MANUAL Software Version 1 5 3 IMIG MILLER co M C Miller Co Inc 11640 U S Highway 1 Sebastian FL32958 U S A Telephone 772 7949448 Website www mcmiller com MANUAL CONTENTS SECTION TE INTRODUCTION ceaass obceess lees teote glia eaes SECTION I OPERATIONAL ITEMS II 1 Battery life and How to Check Battery Status 0 08 7 II 2 How the GPS Receiver Unit is Switched ON and How its Internal Battery Gets Charged 4 osscasicccsernitvanceeer ser keness II 3 How to Reboot Reset the G1 Data logger 4 Il 4 How to Run the Independent GPS Program 4 SECTION II USING THE G1 DATA LOGGER TO PERFORM PIPELINE SURVEYS III 1 How to Set Up the G1 for CIS Applications 4 1 III 2 How to Connect the G1 with the other Test Equipment LOP C 1S ADP CANONS sled e EE EEE ven aens III 3 How to Set Up the G1 for DCVG Survey Applications 57 III 4 How to Connect the G1 with the other Test Equipment for DCVG Survey Applications ccc cce eee e cence eens II 5 How to Set Up the G1 for Combined DCVG CIS Survey Application Sioen iei ene nun e e E EA III 6 How to Connect the G1 with the other Test Equipment for Combined DCVG CIS Applications ee eee 86 II 7 How to Set Up the G1 for Surface Potential Survey Applications arere aoa tenes soa casa ie e aa an
9. Log GPS at Sidedrain Anomaly Max my 1st reading for Tot mv E 67 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 14 Select Max mV Reading to be First Reading in Total mV Determination The last box in the above screen is actually not related to GPS Options If this box is ticked the Max mV voltage value recorded at an anomaly location will automatically become the first voltage value used by the data logger s software to calculate the Total mV total voltage gradient Otherwise if this box is not ticked you will have to repeat the Max mV recording a second time as part of the Total mV determination process See our DCVG Training Manual G1 Version Step 15 Finally on the above screen select the electricity supply operating frequency of the country in which you are performing the surveys 60Hz or 50Hz For the U S select 60Hz Tap on the Next button on the above screen The screen shown below will appear AFGI pis 4 lt 10 09 Name of P L oo Valve Segment DOO O CIS Flag Read Count Yo Dist Per Reading ft Dist Between Flags ft Auto Pacing Mode E 68 Step 16 Enter Pipeline Name and Survey Starting Location Provide the Name of the Pipeline By tapping in the field labe
10. 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 14 Finally on the above screen select the electricity supply operating frequency of the country in which you are performing the surveys 60Hz or 50Hz For the U S select 60Hz Tap on the Next button on the above screen The screen shown below will appear 4 lt 10 09 Name of P L Po Valve Segment O CIS Flag Read Count fo Dist Per Reading ft Dist Between Flags ft Auto Pacing Mode E Step 15 Enter Pipeline Name and Survey Starting Location Provide the Name of the Pipeline By tapping 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 Surface Potential survey that was selected back at Step 6 This is the actual name of the pipeline 101 Provide the Valve Segment Identification Number By tapping in the field labeled Valve Segment you can type in the valve segment name or number if known Provide the Starting Location Provide the Starting Location for the Survey 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 h
11. 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 41 Step 25 Provide the Valve Segment Identification Number if known By tapping in the field labeled Valve Segment you can type in the valve segment name or number if known Step 26 Provide the Starting Location for the Survey 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 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 00 0 your screen would be as shown below 42 PFG PLS REAA Ok Name of P L Line ABC Valve Segment Station Number 12 00 0 CIS Flag Read Count o Dist Per Reading ft Dist Between Flags ft Number of Data Probes Owe Two Auto Pacing Mode E A Step 27 Tap on the N
12. No Data Survey Options Help VN y5 Ej In the above active DCVG survey screen the direction of the arrow pointing to the left or pointing to the right depends on the polarity of the DCVG voltage being measured In the above case the voltage being measured was positive which produced an arrow pointing to the left The opposite would be true if the DCVG voltage reading had been negative ie the arrow would point to the right With the reference electrodes properly positioned the polarity of the DCVG voltage will always be positive in the case of perpendicular DCVG surveys see our DCVG Training Manual G1 Version In this case the arrow on the survey screen will always point back to the pipe T1 However a change in arrow direction will be evident when performing parallel or in line measurements in the vicinity of a DCVG anomaly coating defect In this case the arrow will always point in the direction of the defect location on the pipe with respect to where you are currently standing As you approach the defect the arrow will point towards the upcoming defect location and when you are past the defect the arrow will point back to the defect location Consequently performing in line measurements in the vicinity of a defect can be a good way to pin point its precise location by monitoring the arrow s polarity switches When you are actually straddling a defect location with the reference electrodes in line with t
13. Select Decreasing if the opposite 1s true Step 10b 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 10c Check off DCVG Sidedrains in CIS Survey if you plan to log DCVG sidedrain 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 28 Line Casing Test Station Consumer Purchase Sales Tap POD L Known Station AJG PLS GF e ESTEE ok Mark DCVG DCVG Side Drain Reading Mode ON OFF GPS Sync Voltage Range 5 7 WDC 400 MOhm The Mark DCVG 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 Step 10d Check off Use Automatic Triggering if you plan to use the original trigger 29 cable SIN024 or the new Digital Trigger Cable for automatic triggering of readings Step 11 Make Rectifier Mode selection In the case where a pipeline is cathodically protected via an impressed current current flow to the pipe from an anode driven by an external DC
14. You can use the G1 as a stand alone voltmeter waveform analyzer by tapping on the Voltmeter button on the Survey screen Route Selection screen or on a Prompt screen The stand alone term arises due to the fact that in this mode the voltmeter is operating outside of the site survey parameters and is being used in an independent non data logging capacity By tapping on the Voltmeter button the screen shown below will appear depending on previous settings 140 5 7 400 MOhm On Off 1 2459 v on 0 8657 v off E In the above case the stand alone voltmeter is reading the High and the Low pipe to soil voltages at a test station with the Range and Input Impedance values selected as 5 7V and 400MOhm respectively The Red and the Black banana plug terminals on the top side of the G1 can be used to read voltages or alternatively if an MCM data probe reference electrode having a 5 pin connector socket is being used the data probe will be connected to the 5 pin socket on the top side of the G1 which will connect to the negative side of the voltmeter assuming that a black band data probe cable is being used and the Red banana plug terminal will be used to connect to the positive side of the voltmeter If other voltmeter settings are required to make a reading you can tap on the Settings button and make your selection changes before taking the readings The screen will be
15. enter your programmed recording schedule the G1 will switch itself off to conserve battery power when you tap on the OK button and it will switch itself back on again 10 minutes prior to your programmed start time Also the G1 will switch itself off 10 minutes after your programmed stop time again to conserve battery power V 3 How to Use the G1 as a Stand Alone Voltmeter Waveform Analyzer Stationary Data Logger Program The G1 data logger can be used as a stand alone voltmeter waveform analyzer in situations where such applications maybe warranted in association with SDL applications For example at test points on your pipeline where you can make electrical contact with the pipeline and where you might set up the G1 in the SDL mode you might wish to confirm that the CP rectifiers are switching On and Off at the prescribed cycle rate and that the IR drop magnitude is sizable enough for the On Off reading mode to be applicable for example Also you might want to make sure that all of the rectifiers having an affect on the pipeline under examination are being switched On and Off in a synchronized fashion You can use the G1 as a stand alone voltmeter by tapping on the Voltmeter button on the main application screen The stand alone term arises due to the fact that in this mode the voltmeter is operating outside of the SDL parameters and is being used in an independent non data logging ca
16. green once per second when a stable NMEA output has been established The Bluetooth indicator should be OFF Step 2 Switch on the G1 and open the GIGPS program to run the G1 s GPS utility program Tap on the Settings button and select NMEA via the drop down list in the GPS field Also select COM4 from the adjacent drop down list Next tap on the Save button Step 3 Connect the GPS receiver to the G1 via the serial cable that came with the G1 black cable with a 26 way terminal on one end and a 9 pin female terminal on the other end Connect the serial cable to the COM4 port on the G1 which is the right hand port as you face the screen Step 4 View the GPS data on the G1 screen The screen will appear as indicated in the example below HF Start q 1 58 ok Data Folder My Documents Filename Latitude N 27 647203 Longitude W 80 414720 Altitude 74 feet Sat In Use 9 GPS Mode Differential GPS PDOP No Data EPE No Data Fix Time 17 57 45 PM E Step 5 Exit the GIGPS program when GPS data have been displayed as indicated above 198 SECTION 3 How to Setup the G1 for a Pipeline Survey Application with an Integrated Pro Series Receiver Step 1 Switch on the G1 open the G1PLS program and run through the normal procedures for setting up a survey file Step 2 Make the following selections on the second survey setup screen Select NMEA via the drop down list in the
17. handled cane is disabled This means that the trigger event that will initiate the recording of first the DC VG data and second the CIS data will be pressing of the left hand cane s push button This also means that flags will have to be designated by tapping on the Flag button on the Survey screen 82 Prior to performing Combined DCVG CIS applications it is highly recommended that you first use the G1 data logger to perform individual DCVG and CIS surveys as described in the preceding sections in order to become familiar with the test apparatus including the G1 and the measurement procedures for both survey types You are also referred to our DCVG and CIS Training Manuals which are companion manuals to the G1 User s Manual for specific instructions on how to perform these survey types Setting Up Combined Surveys The set up procedures for Combined DCVG CIS applications as far as the G1 is concerned are very similar to those detailed above for DCVG surveys You are referred to Section II 3 for specific information on screen selections Survey Type DCVYG CIS v Rectifier Mode Cycle ON OFF v Cane Buttons Allowed D C P None Save Survey Walking Direction Increasing OQ Decreasing C Use Metric The first step is to select DCVG CIS from the pull down list in the Survey Type box shown on the above screen 83 You will notice that you are not able to select the functi
18. larger or smaller than the previous reading the site 129 will be marked as non compliant and this will raise a red flag when the survey data are posted to ProActive If GPS data were logged previously for each site on the route and you have an active GPS receiver associated with your G1 data logger see Step 2 above you can elect to Show All or Show Nearest If you select Show All the sites will be listed from top to bottom in the order that was established on the ProActive side for the route If you select Show Nearest the data logger software will re order the site list and the list will be ordered from top to bottom based on the distance of each site from your present location the closest site being at the top of the list This site list is updated every 5 seconds The GPS status indicator a flashing on and off icon provides the following status indications Flashing S icon Means that the G1 is receiving standard uncorrected GPS position data from the GPS receiver Flashing D icon Means that the G1 is receiving differentially corrected GPS position data from the GPS receiver Flashing 6 icon Means that the G1 is not receiving GPS position data Finally you would place a tick in the box labeled Enable Interruption if your rectifier current was being interrupted switched On and Off in a cyclic fashion during your site survey Step 4 Collect Data for each Site
19. 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 Readings interval from 2 5 feet to 5 0 feet for example To make setup selection changes tap on the Options button at the bottom of the screen The screen will appear as shown below 108 Settings iew Settings Ctrl S Yoltmeter Ctrl M alidation Ctrl L Ctrl w Wave Edit Survey Data Ctrl E Delete Last Reading Ctrl D Restart Flags Ctrl F Set Graph Scale Alt Ctrl R Memory Monitor Survey Options Help VN YS E To make any 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 setup selections you can tap on View Settings on the above menu after tapping on Options menu button III 9 How to Use the G1 as a Stand Alone Voltmeter Waveform Analyzer Pipeline Survey Program The G1 data logger can be used as a stand alone voltmeter waveform analyzer in situations where such applications maybe warranted in association with the performance of a pipeline survey For example at devices on your pipeline survey where you can make electrical contact with the pipeline you might wish to confirm that the CP
20. trigger DCVG voltage recordings using the right hand positive reference electrode and the left hand reference electrode s push button switch would be used to designate the location of survey flags For this case your Survey selection for canes would be Flag Read as shown in the above screen The other options can be viewed by tapping on the pull down list arrow button in the Survey field You can also use either cane button when recording voltages at D C P s data collection points devices to save a device reading as opposed to 63 tapping on the save button on the device screen For example with the selection as indicated on the above screen device readings would be recorded automatically by triggering either cane button which is the save option If you prefer to tap buttons on the screen at Devices select the none option in the D C P box Note When Marking DCVG anomalies see DCVG Training Manual the cane push button functionality becomes accept regardless of whether save or none is selected here Steplla Select Walking Direction Finally on the above screen you should indicate whether station numbers will be increasing or decreasing as you proceed in the survey direction by tapping on either Increasing or Decreasing in the Survey Walking Direction box Step 11b Make selection of Metric units if required By checking off
21. 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 By tapping on the OK button you will be returned to the Settings screen Waveform Analyzer A second application of the stand alone voltmeter is as a waveform analyzer To use this function tap on the Waveform button on the Setting screen The screen shown below will appear depending on the previous settings 168 AJ start 4 4 30 ok 5 7VDC 400MOhm On Off View Data Ej By tapping on the Read button on the above screen you can view for example the pipe to soil voltage waveform at a test point assuming that you have the appropriate cable connections made to the G1 A typical waveform would be as shown in the screen below 11 48a k 5 7VDC 400MOhm On Off Sates Ej 169 Since we set up a 700ms ON and a 300ms OFF rectifier cycle in this example the pipe to soil voltage is High for 0 7 sec and Low for 0 3 sec as evidenced by the 1 second snap shot of the voltage waveform shown in the above screen Since the voltmeter in the G1 has a finite response time 80ms on the 5 7V 400MQ setting the transitions from High to Low and Low to High are not perfect right angled steps These voltage waveforms are very useful with regard t
22. If this box is ticked GPS position data will be logged automatically at flags when either the flag button is tapped directly on the Survey screen or when the push button switch on the designated flag cane is pressed Log GPS at 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 registered 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 38 AJ c1 PLs GF q 9 39 ok Max Far Near Diff OF AG Low Y Alarm 9999 No Alarm i v Auto Log GPS C Differential Gos NEvery Reading Use GPS for AltitiEvery 2 Readings Log GPS at Flags Every 5 Readings Log GPS DCP jFelGver 10 Readings E 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 18 Tap on the Next button on the above screen The specific screen that will appear will depend on if you selected Trigger CIS mode or Continuous CIS mode back at Step 8 If Trigger CIS mode was sele
23. In either case Q100 or Q200 units the survey screen shown below will be displayed Note In the case of the Q200 units the menu items are arrayed along the top of the screen Step 4 Tap on the Survey button located on the menu bar The screen shown below will appear Under Survey there are several options If this is a new survey not a EJ G1_PLS 9 20a Survey Options Help VN y5 Ej Dist From Flag hd BLI Pg New Survey Ctri N Continue Previous Survey Ctrl C Finish Survey Ctrl F Exit Ctrl x Survey Options Help VN yS B continuation of a previous survey tap on New Survey The screen shown below will appear 20 Enter New Survey Filename E Step 6 Enter a filename for the Survey Note This is an important step as the filename is used to identify 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 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 sur
24. Mini D terminal on the bottom left hand side of the G1 as you face the screen and configure your GPS receiver unit to be compatible with your G1 as described below in Section d c How to Install the GPS Pathfinder Controller Software Program onto your G1 Data Logger The first step is to connect the G1 to your PC and to switch on the G1 To make the connection use the cable with a USB connector on one end and a 26 Way Mini D connector on the other end and connect to the COM 1 Port on the G1 bottom left hand terminal looking screen side up Next double click on the icon labeled G1 Installer The next step is to follow the instructions associated with the Installation Wizard that will guide you through the simple installation procedure At the conclusion of the process the GPS Pathfinder Controller software program will be installed on your G1 You can verify that this is the case by the following means depending on whether you have a Q100 unit or a Q200 unit Q100 Units Tap on the Start button on the Home screen and tap on Programs The screen shown below will appear showing the presence of the GPS Pathfinder Controller icon 182 Games Calculator File Explorer G 50 SS G1PLS G1iSDL Giss a oo GPS Infrared Microsoft Pathfinder Receive Reader MSN Pocket Excel Pocket Messenger Word Q200 Units Tap on the Start icon on the desktop bottom left hand corner of desktop tap
25. Port for your external GPS unit in order to avoid potential conflicts with ActiveSync which uses COM 1 98 Step 13 Select GPS Options After selecting the GPS Receiver Type and COM Port choices need to be made regarding GPS Options see screen below Alci Pus GF 4 s46 ok o ac GPS MCM Internal Corn 4 C Differential GPS Required C Use GPS for Altitude Log GPS at Flags Log GPS DCP Feature Log GPS at Sidedrain Anomaly E If a GPS accessory has been selected for use with the data logger for a particular Surface Potential survey all or some of the functions available can be enabled box ticked A box can be ticked or unticked by tapping inside the box The GPS options available are as follows Differential GPS Required This box should be ticked if you only want differentially corrected GPS position data to be logged by the data logger If this box is left unticked it means that you will allow the G1 data logger to log either standard GPS position data or differentially corrected GPS position data Note Logging Standard GPS position data is usually better than having no data logged at all which would be the case if you checked this box and for some reason your GPS receiver was not outputting differentially corrected position data Consequently it may be preferable to leave this box unchecked unless it is imperative that you exclusively log differentially corrected GPS posit
26. Scale Alt Ctrl R Memory Monitor Survey Options Help VM Y5 E The tick beside the Use DCVG CIS Switch option indicates that this option has been enabled III 6 How to Connect the G1 with the other Test Equipment for Combined DCVG CIS Applications The cable connections for Combined DCVG CIS applications employing MCM test equipment are illustrated below in Figure 6 fo Hip GPS Antenna ans Pipeline Right Hand Left Hand Cane Use Cane Use Red Band Black Band Cable Cable Figure 6 Cable Connections for Hook Up of MCM s Combined DCVG CIS Survey Test Equipment As can be seen from Figure 6 a pair of canes reference electrodes is illustrated the left hand cane RED handled cane and the right hand cane GREEN handled cane The canes are placed on the soil in the Perpendicular configuration see DCVG Training Manual G1 Version As discussed in the Introduction to this section only the push button on the left hand cane red handled cane is enabled for Combined DCVG CIS applications This cane is positioned directly over the pipe and it is connected to the MCM Switch Box via the black band cable The black band cable is connected to the Switch Box at the 5 pin terminal labeled as CIS 87 The right hand cane green handled cane is connected to the Switch Box via the red band cable and this cable is connected to the Switch box at the 5 pin termin
27. Tasks Windows Media Dia aii Q200 Units To access the GPS program on Q200 units double tap on the G1GPS icon on the desktop shown below Alternatively you can tap on the Start button tap on Programs and then tap on G1GPS groseesesoeeoeesosoosesoesees G1SDL Transcriber Besosocsosososoesossesesosse Z ige Recycle Bin Giss a e G1GPS Internet Explorer ay Ap G1PLS My Documents ay Fanon of Sy ar maAlE In either case Q100 or Q200 units the screen shown below will appear Data Folder My Documents Filename Latitude No Data Longitude No Data Altitude No Data Sat In Use No Data GPS Mode No Data PDOP No Data EPE No Data Fix Time No Data Desc m gt gt T Next tap on the Settings button which will pull up the screen shown below A Start GF 44 3 23 Settings GPS BIg LEE Data Folder My Documents Ej By tapping on the pull down list arrow button in the GPS field you can select the type of GPS receiver you are using You can select either the MCM Internal receiver or an external NMEA compatible receiver such as a Trimble Pathfinder unit or a Garmin unit If you select to use the MCM Internal receiver COM 4 will automatically be selected If you select NMEA you can select the COM Port by tapping on the drop down list arrow button in the COM field You can select COM 1 or COM 4 COM 1
28. a Device location point In this case there are 2 choices None and Save Your selection is made by tapping on the radial button of your choice If None is selected Pressing a cane button switch will do nothing In this case you would have to tap the save button on the screen having previously tapped the device button if you wished to read and record the voltage data at the Device location If Save is selected Pressing a cane button switch has the same effect as tapping the save button on the Device Readings screen For the most part selecting the 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 a convenient way to do this is to use the push button switch on one of the canes having tapped on the Device button on the screen when a Device is encountered Step 10a Make Survey Walking Direction selection 2T The Survey Walking Direction box is shown in the screen above 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
29. applications the G1 records and time stamps data at a fixed location The time stamping of data can either be accomplished using the G1 s internal clock or the GPS time signal When a GPS receiver is active on the G1 during an SDL application the GPS time signal will be used to time stamp the data and in the absence of an active GPS receiver the data will be time stamped by the G1 s internal clock Typically time stamped data collected over a period of time are used to examine the impact of transient non steady state stray current on a cathodically protected pipeline The term transient is used to describe stray current that is not constant over time This would represent a situation where the magnitude of the stray current impacting a pipeline at some location would vary as a function of time The measurement of pipe to soil potential is often used as an indirect method of monitoring the variation in magnitude over time of stray current flowing to or flowing away discharging from the pipe at some particular location along the pipeline 146 For instance by monitoring the pipe to soil potential at a fixed location over a period of time a chart of pipe to soil potential versus time can be generated for the location If there is no significant transient stray current flowing to or away from the pipe at the measurement location the potential should remain at the steady state value for example 0 950V with respect to a copper
30. as shown below 141 Meter Settings Style On Time ms Off Time ms Calc Settings ewer TT Ej Tapping on the pull down list arrow button in the Style field and selecting On Off and then tapping on the pull down list arrow button in the Range field will pull up the screen shown below Meter Settings 5 7 VDC 400 MOhm fg 570 VDC 75 MOhm 57 WDC 75 MOhm 57 WDC 400 MOhm 5 7 VDC 400 MOhm Off Time ms Calc Settings Range Style On Time rms As can be seen there are 4 selections that can be made in the case of Range depending on the magnitude of the voltage you ll be measuring 142 when the On Off style is selected Each of these 4 settings represents a fast response setting which is appropriate for fast current interruption cycles If you select Single for the read mode Style all voltmeter full scale ranges DC and AC and input impedances are available for selection as indicated on the screen below EF Start 4 lt 10 04 Meter Settings 5 7 VDC 400 MOhm g 40 WAC 75 MOhm Style 570 VDC 75 MOhm 400 VDC 75 MOhm On Time ms 57 WDC 400 MOhm 57 WDC 75 MOhm Off Time ms 40 WDC 75 MOhm 5 7 VDC 400 MOhm 4 DC 10 MOhm 400 m DC 10 MOhm 40 m DC 10 MOhm Range E Finally if your desired data involves a calculation such as for example a voltage to current calculati
31. become a factor in the voltmeter s determination of the true ON and OFF voltage values for each DCVG 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 the 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 Next select your current interrupter s Downbeat timing As indicated by tapping on the pull down list arrow button in the Downbeat box there are 3 industry standard selection choices Each Minute Each Hour and Midnight If Each Minute is an option for your current interrupter we suggest making this selection The Each Minute designation indicates to the data logger that a new interruption cycle will begin at the top of each minute Consequently the data logger can reference its timing to the top of each minute In this instance your On plus Off times your waveform period should be an even multiple of 60 Again for these measurements to be successful the data probes reference electrode canes must remain in good electrical contact with the soil for at least one rectifier current waveform period following the initial contact of the probes with the soil for a stable DCVG voltage value to be displayed Finally if your inter
32. below will appear in response to tapping on the Calc Settings button 135 AJ Start GF 4 3 08 Calculation Settings Calculation cao E Display as millivolts mili amp mps etc C Normally Negative C Save Predominant Reading E You could for example change the type of reference electrode you were using in which case you would enter an appropriate value for the addend Or if you were logging rectifier current values at a rectifier site using a shunt you might want to change the shunt type and or the calculation from those scripted in ProActive Predominant Voltage If you are concerned about variable interference type effects occurring during a voltage reading you can elect to record a predominant voltage the value of which is determined over a period of time perhaps several minutes as opposed to recording a snap shot reading If so check off the box labeled Save Predominant Reading In this reading mode the data logger will sample the voltage on a time interval basis and save the voltage reading that occurred the most frequently over the sampling period This is the predominant voltage When the Read button is tapped the clock starts ticking on the sampling of the voltages and the voltages will continue to be sampled until the Reading button is tapped At that point the predominant reading will be logged If Predominant Reading is not selected regular
33. between the High and the Low voltage readings ie a measurable IR drop is required This is because the voltmeter needs to be able to identify High to Low and Low to High voltage transitions in this mode Currently SDL data can only be time stamped using the internal clock with the voltmeter reading in the On Off Pairs DSP mode 159 On Off Pairs Min Max mode With this voltmeter reading mode selected the screen shown below will appear Range 9 7 V DC 400 MOhm v Interval 1 000 Seconds X AC Cycle Rate Cycle On Time mS Cycle Off Time ms 300 Moving Average Samples Internal Cock GPS Clock GPS Settings Ej This voltmeter mode would be selected if rectifier current interruption was to be used during the collection of your SDL data but the data logger 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 is just the magnitude of the IR drop In this case the voltmeter would record the average maximum and minimum voltages read during each rectifier current cycle Again you should enter the On and the Off times associated with your rectifier current interruption system Our example above indicates 700ms On and 300ms Off for the current interruption cycle Next you should enter your selection of Recording Interval For this
34. click on the Go button in the Driver the window shown below appears 176 Data Logger Get Time Chart Data Time Chart Post Pipeline z Series v Station 0 00 Site type v Matching Site el Using the information in the data logger ProActive tries to find a matching site in the database tree for the time chart Hit the refresh button to attempt to match the site after any change to the data Alternately you can drag drop a site directly into the Matching Site box When the correct site is identified press the Save Readings button JA Save Readings X Cancel The above window allows you to post the SDL time chart data to a particular site device in your ProActive database tree Remember you will have collected the SDL data at a particular site such as a test point and your goal will be to post the data to the folder in your database that represents that site device As indicated in the above window you can either select the pipeline station number and site type for the posting or you can drag and drop the site device from your database tree into the Matching Site field ProActive will actually attempt to locate the site in the database tree based on the information provided in the SDL file assuming that the pipeline station number and site type were correctly entered when setting up the data logger for the SDL application 177 When the site has been correctly identified you would click on
35. establishes a file in which the voltage recordings survey data will be stored At the completion of the survey Surface Potential survey data can then be retrieved by a PC that is in communication with the data logger by accessing the file in which the survey data are stored Step 1 Switch on the G1 by pressing the power button red key on keyboard Assuming that the battery pack is charged the screen will light up and will display the home screen Today screen in the case of the Q100 units and the desktop screen in the case of the Q200 units The startup screens for the Q100 and the Q200 units are illustrated below Q100 Units Monday June 06 2005 P Tap here to set owner information nents 90 Q200 Units Wo iar My i G1SDL Transcriber a ww ge Recycle Bin G155 Se G1GPS Internet Explorer ap a GIPLS My Documents ad PURMCM 4 F gt gt 4 27 PM ZA E Step 2 In the case of the Q100 units tap on the Start button on the Home screen This will pull up the main menu Step 3 In the case of the Q100 units tap on the G1 PLS button on the main menu In the case of the Q200 units double tap on the GIPLS icon on the desktop or tap on the start icon bottom left hand corner of desktop tap on the Programs button and tap on the G1PLS button In either case Q100 or Q200 units the survey screen shown below will be displayed Note In the case of
36. hand side is the COM 4 Port It is recommended that you select the COM 4 Port for your external GPS unit in order to avoid potential conflicts with ActiveSync which uses COM 1 65 Step 13 Select GPS Options After selecting the GPS Receiver Type and COM Port choices need to be made regarding GPS Options see screen below GF 4 208 GPS MCM Internal Com 4 C Differential GPS Required Use GPS for Altitude Log GPS at Flags Log GPS DCP Feature Log GPS at Sidedrain Anomaly Max my 1st reading for Tot mv E If a GPS accessory has been selected for use with the data logger for a particular DCVG survey all or some of the functions available can be enabled box ticked A box can be ticked or unticked by tapping inside the box The GPS options available are as follows Differential GPS Required This box should be ticked if you only want differentially corrected GPS position data to be logged by the data logger If this box is left unticked it means that you will allow the G1 data logger to log either standard GPS position data or differentially corrected GPS position data Note Logging Standard GPS position data is usually better than having no data logged at all which would be the case if you checked this box and for some reason your GPS receiver was not outputting differentially corrected position data Consequently it may be preferable to leave this box unchecked unless it is impe
37. invalid characters Step 7 Tap once on the OK button The screen shown below will appear 61 JF G1_PLS Eee ok v Survey Type Wiem ga Rectifier Mode Cycle ON OFF X Cane Buttons Allowed D C P Survey None Left Right Save Flag Read x Survey Walking Direction Increasing Decreasing C Use Metric Cancel Next Ej Step 8 Select Survey Type The 5 available survey types can be seen by tapping on the pull down list arrow in the Survey Type box as shown on the screen below Trigger CIS continuous CIS Rectifier Mode Trigger CIS DCVG DcV G CIS Surface Potential Survey Type Cane Bu D C P None Save Survey Walking Direction Increasing Decreasing C Use Metric ion Ej 62 Tap on DCVG to select a DCVG survey type The screen shown below will appear Agl ci_ris q 9 147 ok Survey Type DCV G z Rectifier Mode Cycle ON OFF v col Buttons sak Oi rai fia tal Right Save Fag Read gt Survey Walking Direction Increasing Decreasing C Use Metric Ej Step 9 Select Rectifier Mode Select Cycle ON OFF in the Rectifier Mode field by tapping on the pull down list arrow button and highlighting Cycle ON OFF This is the only appropriate rectifier mode for DCVG surveys Step 10 Make Cane Button Functionality Choices Typically for DCVG surveys you would
38. is required With this voltmeter reading mode selected after tapping on the OK button the screen shown below will appear 46 On Off Pairs Min Max mode This voltmeter mode would be selected if you were performing a High Low CIS but the data logger 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 just the magnitude of the IR drop In this case the voltmeter would record the average maximum and minimum voltage readings during each rectifier current cycle With this voltmeter reading mode selected after tapping on the OK button the screen shown below will appear Range 5 7 DC 400 MOhm v Moving Average Samples On Off cyl ms E In this 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 47 On Off Pairs GPS Sync This voltmeter mode can only be selected if you are using either the MCM Internal GPS unit or the MCM External GPS unit on
39. on the Programs icon which will pull up the screen shown below To open the Controller software program tap on the GPS Pathfinder Controller icon tlle Communication D Microsoft File Viewers Calculator HS Command Prompt 81 G1GPS T Inbox Internet Explorer 183 You can now at anytime connect your GPS Pathfinder receiver unit to your G1 data logger via the COM 1 Port on the G1 which is the 26 Way Mini D terminal on the bottom left hand side of the G1 as you face the screen You will require a special cable to make this connection which is MCM part number 126730 G1 Serial Cable in conjunction with your Trimble cable With the units connected you can configure your GPS Pathfinder receiver unit to be compatible with your G1 as described below in Section d d How to Configure GPS Pathfinder Receivers to Output NMEA Data Suitable for Use by the G1 Data Logger Step 1 The first step in the configuration process is to connect the GPS receiver to your PC if you have installed the Controller software program on your PC or to your G1 if you have installed the Controller program onto your G1 In either case use the COM 1 Port on the G1 Make sure that the battery pack is connected and that battery power is being applied to your receiver unit Step 2 Next double click on the GPS Pathfinder Controller icon located on either your PC s desktop screen or on the Programs screen
40. performs a switching operation which allows the CIS pipe to soil voltages to be recorded When the CIS data have been recorded the G1 will beep which is the signal that you can move the reference electrodes to the next measurement location Since as discussed below you will be effectively only using one reference electrode one data probe to collect the CIS data the left hand red handled data probe that will be positioned over the pipe the CIS data will be determined from the cycle of the pipe to soil waveform that is sampled immediately after the trigger event This explains why it is imperative that the data probes remain in contact with the soil for at least one cycle after the trigger Again the DA Meter will beep to advise you that the CIS data have been recorded and that you can proceed to the next measurement location In contrast the DCVG data are determined from the cycle of the waveform occurring just in front of the trigger event Consequently it could take up to two waveform periods two On plus Off times to record both sets of data from the time at which the data probes make good electrical contact with the soil at each measurement location Another major difference between Combined DCVG CIS applications and conventional DCVG and CIS applications is that in the Combined DCVG CIS case only the push button trigger on the left hand cane red handled cane is enabled the push button on the right hand cane green
41. reading mode the shortest recording interval is the period of the waveform cycle which in our case is 1 second In this 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 160 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 Currently SDL data can only be time stamped using the internal clock with the voltmeter reading in the On Off Pairs Min Max mode On Off Pairs GPS Sync With this voltmeter reading mode selected the screen shown below will appear AF start q 4 50 Interval Seconds AC Cycle Rate Cycle On Time mS Cycle Off Time mS Internal Clock GPS Cloc E This voltmeter reading mode can only be selected if you are using either the MCM Internal GPS unit or the MCM External GPS unit on your G1 AND current interrupter switches equipped with GPS units are being employed on your rectifiers In these cases with this reading mode voltage readings High Low readings are synchronized with the current interrupter switching timing 161 Again you should enter the On and the Off times associated with your rectifier current interruption system Our example above indicat
42. receiver and you are also using current interrupters with integrated GPS receivers Once you have gone through the setup screens the Survey screen will appear as shown below 84 GPS Status No Data Survey Options Help VM y5 E As can be seen from the above screen the Combined DCVG CIS Survey screen looks very similar to the DCVG survey screen see Section III 3 for a full description of this screen The major difference however is the presence of the CIS button You can at anytime during the Combined Survey tap on the CIS button to view the CIS data that has been recorded The data will be displayed on the graph After viewing the CIS graph you can return to the above screen by tapping on the DCVG button which will have replaced the CIS button As mentioned in the Introduction to this section DCVG and CIS data can be collected at each measurement location by virtue of using an MCM Switch Box When you select the DCVG CIS Survey Type the G1 will enable the DCVG CIS Switch option You can check to make sure that this Switch option has been enabled by tapping on Options and then tapping on Settings which will pull up the screen shown below 85 Change Global Settings Ctrl G Ctrl oltmeter Settings Update Feature List v Use DC G CIS Switch Edit Survey Data Ctrl E Delete Last Reading Ctrl D Restart Flags Ctrl F Set Graph
43. rectifiers are switching On and Off at the prescribed cycle rate and that the IR drop magnitude is sizable enough for the On Off Pairs DSP reading mode to be applicable for example Also you might want to make sure that all of the rectifiers having an affect on the pipeline involved with your survey are being switched On and Off in a synchronized fashion Or you 109 might want to check certain readings that are not an integral part of the survey itself You can use the G1 as a stand alone voltmeter by tapping on the Voltmeter button VM button on the bottom of the Survey screen or by tapping on Options and then tapping on Voltmeter The stand alone term arises due to the fact that in this mode the voltmeter is operating outside of the pipeline survey parameters and is being used in an independent non data logging capacity By tapping on the Voltmeter button the screen shown below will appear depending on previous settings Alci Pus A 4 142 ok ON 1 2459 OFF 0 8654 Range 5 7 VDC 400 MOhm Read Mode on msio off msx Stop Voltmeter Done Ej In the above case the stand alone voltmeter is reading the High and the Low pipe to soil voltages at a test station with the Range and Input Impedance values selected as 5 7V and 400MOhm respectively The Red and the Black banana plug terminals on the top side of the G1 can be used t
44. 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 set up scripted via the software The voltage recorded prior to disconnecting the trailing wire will be considered the FAR Ground reading since you will be a considerable distance 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 34 By tapping inside the field labeled Max Far Near Diff the number indicated in the above case the number shown is 5 can be changed to any value desired by typing in the number If for example the number 5 is entered in this field this means that the maximum allowable difference between FAR and NEAR 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 R
45. the Save Readings button on the above window which will post the time chart data to the folder Details Form representing that particular site You can then view the time chart data in ProActive by opening the Details Form and clicking on the Time Chart page tab 178 APPENDIX 1 HOW TO CONFIGURE TRIMBLE GPS PATHFINDER XR XRS Power and Pocket RECEIVERS FOR USE WITH THE G1 DATA LOGGER a Introduction Although standard uncorrected GPS data only provides a position accuracy of around 15 meters real time corrected GPS data can result in a position accuracy of better than 1 meter making real time corrected GPS data more suitable for pipeline survey applications In order to output real time corrected GPS position data a GPS receiver has to be coupled with a correction message receiver which receives a correction message transmitted by one of three major systems namely the WAAS Satellite and Beacon correction message generating systems In most cases the correction message receiver is integrated with the GPS receiver in one unit although external correction message receivers are also used For example our MCM GPS receivers which have integrated correction message receivers make use of correction messages transmitted by the WAAS system The WAAS system works well in open areas throughout North America however in some locations such as heavily wooded or mountainous areas it is difficult to recei
46. the Q200 units the menu items are arrayed along the top of the screen 91 Step 4 G1_PLS 9 20a Fla io v GPS Data v Dist From Flag psi o amp i Geo Feat 5 500 f Read 0 000 Survey Options Help VN y5 Ej Tap on Survey in the menu bar along the bottom of the above screen The screen shown below will appear Under Survey there are several options If this is a new survey not a Dist From Flag PL F New Survey Ctri N Continue Previous Survey Ctrl C Finish Survey Ctrl F Exit Ctrl x Survey Options Help VN V5 Ej continuation of a previous survey tap on New Survey The screen shown below will appear 92 Enter New Survey Filename E Step 6 Enter a filename for the Survey Note This is an important step as the filename is used to identify 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 For example let s assume that pipeline company XYZ has a pipeline located in Texas and that the pipeline is id
47. the data were recorded being associated with the value of the data Time stamping is accomplished using the G1 s internal clock when a GPS receiver is not used and when a GPS receiver is employed the potential data are stamped with the time signal received from the satellite system Once the time stamped data have been collected and saved in a file on the G1 data logger the data can be uploaded to ProActive in which time charts can be generated and in which correction factors can be determined in cases where CIS data are to be corrected for spurious stray current effects for example Again however for correction factors to be determined the SDL data and the CIS data must both be GPS time stamped The process of uploading time stamped data from the G1 to ProActive is described in Section V 4 148 Step 1 Switch on the G1 by pressing the power button red key on keyboard Assuming that the battery pack is charged see Section II the screen will light up and will display the home screen Today screen in the case of the Q100 units and the desktop screen in the case of the Q200 units The startup screens for the Q100 and the Q200 units are illustrated below Q100 Units Q200 Units AZ start Monday June 06 2005 E Tap here to set owner information Ne upcoming TERAST TA J ig Recycle Bin G155 G1GPS Internet Explorer She ye a i G1PLS My Documents
48. 0MOhm On Off eee E 116 By tapping on the Read button on the above screen you can view for example the pipe to soil voltage waveform at a test site assuming that you have the appropriate cable connections made to the G1 A typical waveform would be as shown in the screen below 11 48a ok 5 7VDC 400MOhm On Off E Since we set up a 700ms ON and a 300ms OFF rectifier cycle in this example the pipe to soil voltage is High for 0 7 sec and Low for 0 3 sec as evidenced by the 1 second snap shot of the voltage waveform shown in the above screen Since the voltmeter in the G1 has a finite response time 80ms in the 5 7V 400MOhm setting the transitions from High to Low and Low to High are not perfect right angled steps Also since the voltmeter samples the voltage only 50 times per second every 20 milliseconds any AC components of the waveform with a frequency higher than 50 Hz will be filtered out by the voltmeter However these voltage waveforms are very useful with regard to confirming multiple rectifier synchronization for example and with regard to checking for On to Off and Off to On transition spikes To record a pipe to soil voltage waveform tap on the Save button on the above screen The screen shown below will appear 117 EJ G1_PLS 11 42a Save As Name Untitled Folder G1_Data v Type Waveform Files wfm v Location Compact Flash
49. 149 Step 2 In the case of the Q100 units tap on the Start button on the Home screen This will pull up the main menu Step 3 In the case of the Q100 units tap on the GISDL button on the main menu In the case of the Q200 units double tap on the GISDL icon on the desktop or tap on the start icon bottom left hand corner of desktop tap on the Programs button and tap on the GISDL button In either case Q100 or Q200 units the survey screen shown below will be displayed Se Ok Name Meter aps Data Remarks Edit Data i Status Stopped Logged Settings mal Z p Og J Q O oo Oo E At this stage only certain buttons are active since we haven t as yet set up an application The About button will reveal important information about your G1 including the version number of the application program you are currently running you will receive updates of this software from time to time as new features are implemented and the serial number of the voltmeter inside of your G1 data logger which is licensed to you by MCM The screen that appears when you tap on the About button is as shown below 150 Gatherer One SL Stationary Data Logger Version 1 3 1 Voltmeter S N 3159 License Expires 11 01 2006 Copyright C 2005 M C Miller Co Inc E The Voltmeter button can be used to select the settings of the G1 data logger s stand al
50. 50 703 1 2055 0773072004 14 16 50 703 07 30 2004 14 16 51 701 1 20793 077 3072004 141651 701 07 30 2004 14 16 52 700 1 2053 07 30 2004 14 16 52 700 07 30 2094 14 16 52699 1 2031 07 30 2004 14 16 53 699 07 30 2004 14 16 54 699 1 2086 07 30 2004 14 16 54 698 16 55697 1 2031 0773972004 14 16 55 537 1 2074 0773072004 14 16 56 6968 1 2031 077 3072004 141657 695 07 30 2004 14 16 53 713 1 2076 07 30 2004 14 16 58 713 07 30 2004 14 16 53 712 1 2083 07 30 2004 14 16 59 712 07 30 2094 14 17 03 711 1 2052 0773072004 14 17 00 711 077 3072004 14 17 01 710 1 2036 0773072004 14 17 01 710 07 30 2094 14 17 02 709 1 2091 0773072004 14 17 02 703 07 30 2004 14 17 03 708 1 2070 07 3972004 14 17 03 708 NF INZAM 14 17 04 707 l 1 AA NANN 14 17 14 A7 174 The above screen displays the first 23 rows of data for the example application As can be seen from the above screen the On and the Off pipe to soil voltage recordings are date and time GMT stamped The window shown below which was pulled up by tapping on the Graph page tab on the Driver window displays a graphical presentation of the SDL data a time chart Gatherer One Driver Time Chart Data Download Logger Into Readres Graph amp ES ENEN AA Ports Redline I Featured I MCM Test Point gt ry gt gt 14 18 14 7 36 2004 10 27 45 AM A graphical representation of SDL data is extremely useful with regard t
51. 800 Data Bits 8 Stop Bits 1 Parity None 188 Step 6 Click or tap on the OK button on the above Port A Settings window which will save these communications settings Step 7 Click or tap on Settings again and then click or tap on NMEA Settings this time By doing so the window shown below will appear NMEA Settings Output Interval sec 1 X NMEA Strings lV GGAT VTG T GLL JT GSA l sv f IHMEEN ZDA OK Cancel OK The NMEA data string format labeled as GGA should be selected box checked All other boxes should be left unchecked The GGA data string contains position data latitude longitude and altitude as well as the time UTC that each position was fixed In addition the GGA string contains data that indicate whether or not real time correction was applied and how many satellites were involved for each position fix The Output Interval refers to the interval of time between the output of one string of NMEA data and the output of the next string of NMEA data by the receiver For application with the G1 an Output Interval of 1 second should be selected by clicking or tapping on the pull down list arrow in the box labeled Output Interval and selecting 1 Since our data strings contain position data GGA format and since we are requesting a new data string to be output by the receiver each second this means that the receive
52. Automatic Triggering C Use Matric Per Gi_PLS Survey Type Rectifier Mode DCVG and combined DCVG CIS surveys are available for selection as well as Surface Potential 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 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 trigger cable part SIN024 for automatic triggering of readings in conjunction with the wire chainer counter unit http www mcemiller com pdfs Chainer_Counter_Original pdf or when using the Digital Trigger Cable for automatic triggering of readings http www mcemiller com pdfs Chainer_Counter_New pdf 23 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 9 Select the function op
53. Consequently the data logger can reference its timing to the top of each minute In this instance your On plus Off times your waveform period should be an even multiple of 60 When using an external GPS unit you need to select the Com Port that you ll be using on the G1 see above screen The connector terminal on the left hand side of the data logger facing the bottom side is the COM 1 Port and the terminal on the right hand side is the COM 4 Port It is recommended that you select the COM 4 Port for your external GPS unit in order to avoid potential conflicts with ActiveSync which uses COM 1 By tapping on the OK button you will be returned to the voltmeter settings screen CURRENT shunt voltage This mode would be selected if you were using the G1 to measure current via a shunt By selecting this mode the screen shown below will appear 113 AJ c1_pis Pe kok Voltage 0 a 065 Range 140 mv DC 10 MOhm Read Mode CURR Shunt Type Stop Voltmeter Done E A number of industry standard shunts can be selected by tapping on the pull down list arrow button in the Shunt Type field after tapping on the Stop Voltmeter button to make any desired settings changes You can also select other and enter your own shunt factor in the Factor field Note The units of the displayed Voltage Volts or milli Volts will depend on the settings selected in the Range
54. Flash card Following on screen instructions you will have to recalibrate the touch screen and re enter your personal settings which will have been lost with the lost registry In addition you will receive a G1 Install prompt to Set the date and time The program copying process from CompactFlash card to RAM will be launched after you have set the time and date on your G1 in response to this prompt When the copying process is complete the MCM GPS Power Control screen will appear Simply exit this screen making sure to leave the selection as Power on when charging to return to the Gl desktop The application programs will have been re installed automatically II 4 How to Run the Independent GPS Program There is a GPS program on the G1 that can be run independently of the survey application programs You can use the program to view GPS position data on the G1 screen at a given location and you can also log save the GPS position data Logged data will be stored in a text file on your G1 and you can copy the file to your PC using ActiveSync Q100 Units To access the GPS program on Q100 units tap on the Start button on the Home screen which will pull up the menu shown below and then tap on the G1GPS button tll Sh Gk PF Por EH Gh Today Activesync E Calendar i Contacts G1 GIGPS G1 GIPLS G1 G1SDL SOL G1 Giss Inbox Internet Explorer bur MCMGPSPWR J Notes Z
55. For these measurements to be successful the data probes reference electrode canes must remain in good electrical contact with the soil for at least one rectifier current waveform period following the initial contact of the probes with the soil for a stable DCVG voltage value to be displayed On Off Pairs GPS Sync This voltmeter mode could be selected if you were using an MCM GPS receiver on your G1 data logger and current interrupter switches equipped with GPS units were being employed on the rectifiers In this case AV On and AV Off values are based on potentials measured at pre determined sampling times on each waveform cycle which are synchronized with the current interruption switching timing Also in this case you would tap on the GPS Settings button which would bring up the screen shown below 1150 Downbeat Each Minute v Cycle Start On gt Off MCM Internal X GPS Type a MCM Internal E You are being asked here to make several selections 74 First select the type of GPS unit you will be using the data logger s Internal unit or the MCM External unit ONLY Next enter your On Delay and your Off Delay selections by tapping in the appropriate box 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
56. Impedance Settings 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 DCVG surveys are 5 7 Volts 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 and also a relatively sensitive scale with regard to the magnitude of the DCVG voltages that you ll be measuring 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 DCVG 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 76 Step 25 Pull up Active Survey Screen By tapping on the OK button on the Voltmeter Settings screen the active Survey screen would appear and you would be ready to proceed with your DCVG survey An example starting active Survey screen is shown below GPS Status
57. 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 On Off Pairs DSP mode With this voltmeter reading mode selected the screen shown below will appear This voltmeter mode is an option if rectifier current interruption is to be in effect during the SDL data collection period 158 Again you should enter the On and the Off times associated with your rectifier current interruption system Our example below indicates 700ms On and 300ms Off for the current interruption cycle Next you should enter your selection of Recording Interval For this mode the shortest recording interval is the period of the waveform cycle which in our case is 1 second AJ start m 4 44 fok Mode SEE eE Range Interval Seconds AC Cycle Rate Cycle On Time mS Cycle Off Time mS Internal Clock GPS Clock GPS Settings In the On Off DSP 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 When each reading time occurs which represents the signal to record voltages the voltmeter uses the sampled readings from the waveform cycle that immediately preceded the reading time in order to determine the High and the Low voltages for that reading time This voltmeter reading mode requires a measurable difference
58. PS Pathfinder XR XRS Power and Pocket Receivers for Use with the G1 Data Logger a NG OCNICIIO Ma fence icin Se uote aves cle de Stoll soe nasa dinda thet a TERE 179 b How to Install the GPS Pathfinder Controller Software Program onto VOU Ce srersason ed sine tak ti E a EEE E EE 182 c How to Install the GPS Pathfinder Controller Software Program Onto VOOR ritenete ea E i E E ERA e 182 d How to Configure GPS Pathfinder Receivers to a NMEA Data Suitable for Use by the G1 saa E E A Or e How to Connect a Configured GPS Pathfinder Receiver tothe GI eeaeee ere a a NEE EE E EEEE EE E 191 Appendix 2 How to Configure Trimble GPS Pathfinder ProXT and ProXH Receivers for Use with the G1 Data Logger Section 1 How to Configure the GPS receiver for use with the G1 192 Section 2 How to test the GPS receiver G1 Connection 197 Section 3 How to Setup the G1 for a Pipeline Survey Application with an integrated Pro Series Receiver 04 199 SECTION I INTRODUCTION The Gatherer One G1 data logger manufactured by MCM is a combination of a high input impedance digital voltmeter and a handheld Personal Computer PC The operating system of the PC is either Microsoft Pocket PC for the Q100 or CE NET 4 2 for the Q200 and MCM has designed proprietary application programs in order that the G1 data logger can be employed to run Scripted Site Survey
59. SBAS which is WAAS differential correction and click on the wrench button which will pull up the screen shown below i GPS Controller Setup bd ay Integrated SBAS Settings A cancel Tracking Mode v Use SBAS Satellites WAAS PRN 122 B State Enabled Heed Health PRN 134 State Enabled Heed Health EGNOS PRN 120 State Enabled Heed Health w Next on the above screen select Auto for the Tracking Mode 196 Next click on the OK button on the Integrated SBAS Settings screen and then click on the OK button on the Real time Settings screen which will bring you back to the Setup screen as shown below i GPS Controller Setup v ay oil Options se GPS Real time Settings Settings Step 11 Click on the Options drop down on the above screen and select Disconnect from GPS Your NMEA settings will be transmitted to the GPS receiver upon disconnecting The GPS receiver is now configured for use with the G1 data logger SECTION 2 How to Test the GPS Receiver G1 Connection Note To test the connection the GPS receiver will require an unobstructed view of the satellites in an outside location To test that the G1 is receiving the NMEA output of the GPS receiver perform the following steps Step 1 Switch on the GPS receiver The battery indicator on the GPS receiver should glow green permanently ON and the satellite indicator 197 should flash ON
60. Serial Cable which is MCM part number 126730 to connect the receiver to the G1 This special cable is used in conjunction with your selection of Trimble cable see section d step 4 above 191 APPENDIX 2 HOW TO CONFIGURE TRIMBLE GPS PATHFINDER ProXT and ProXH RECEIVERS FOR USE WITH THE G1 DATA LOGGER SECTION 1 How to Configure the GPS Receiver for Use with the G1 Step 1 Insert the Trimble GPS Pathfinder Pro Series CD into the CD Drive of your laptop or PC and click on the GPS Controller Software option on the main menu Step 2 Click on the Install on this PC option and run through the Installation Wizard for the GPS Controller 2 00 software for the desktop Step 3 Exit the CD image Step 4 Press and release the power button on the GPS receiver unit The battery indicator on the GPS receiver should glow green permanently ON and the satellite indicator should flash green ON and OFF The Bluetooth indicator should be OFF If the Bluetooth indicator flashes blue press and hold the power button until the flashing stops permanently and then release the hold Step 5 Connect the serial cable that came with the Trimble unit black cable with 9 pin female terminals at both ends between the GPS receiver and your laptop or PC Note If you use an ActiveSync connection on the laptop or PC for example for downloading G1 survey data ActiveSync has to be temporarily disconnected to allow the GPS recei
61. TEMPORARILY NOT USED CONNECTS TO CONNECT TOATS SWITCH BOX Figure 7 Connection terminals on top side of the G1 The 5 pin Data Probe Connector Socket is shown above as Terminal 1 As discussed above the reference electrode canes are connected to this terminal via the Switch Box The red and black banana plug terminals Terminals 2 and 3 are not used in this Combined DCVG CIS application However the red banana plug terminal Terminal 3 is used to connect temporarily a test cable between the G1 and a test station TS in order to record pipe to soil voltages and voltage waveforms prior to beginning a Combined DCVG CIS survey see DCVG Training Manual G1 Version The GPS Antenna shown above is employed by the data logger s internal GPS unit External GPS units are connected to either the left hand side COM Port COM 1 or the right hand side COM Port COM 4 located on the bottom side of the data logger As mentioned above in Section III 3 the COM 4 Port is recommended to avoid conflict with ActiveSync 89 III 7 How to Set Up the G1 for Surface Potential Survey Applications The following section outlines the steps required to setup the G1 data logger to participate in Surface Potential survey 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 Surface Potential application The setup process also
62. abled and the Read Read option is automatically selected If Continuous CIS mode is selected the screen will be as shown below EFA ok Survey Type Continuous CIS v Rectifier Mode Cycle ON OFF v Cane Buttons Allowed D C P None Left Right Save Flag Paus v Flag Pause Survey Walki Fay Bic Increasing pause _ Pause C Use Metric 26 The 4 choices for the set of two canes in the Continuous CIS mode are revealed in the Survey field by tapping on the pull down list arrow button 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 many 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
63. above screen is used to establish the reading mode in which the digital voltmeter will be operating during the CIS measurements Remember the data being logged by the data logger are actually voltages that are measured by a voltmeter The 5 choices available for the voltmeter s reading mode are observed by tapping on the pull down list arrow button in the Read Mode field on the above screen The new screen will appear as shown below 45 Aci Pus 463 23 Read Mode On Off Pairs DSP moc Single Read On Off Pairs DSP mode Single Read GPS Timing On Off cr E 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 11 and GPS Accessory selection back at Step16 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
64. aes erties 90 III 8 How to Make Changes to your Pipeline Survey Set Up Selections a itvetenintcsc cote waste waid eau nate hen nae hah od ches III 9 How to Use the G1 as a Stand Alone Voltmeter Waveform Analyzer Pipeline Survey Program continued SECTION IV USING THE G1 DATA LOGGER TO PERFORM SCRIPTED SITE SURVEYS TVs T Introd cton 6 55 wees ceo ce icadas eee a E a EE cen i a 119 IV 2 How to Load the G1 with a Scripted Route from POA CUS kiesne inann ra EEEE worse gute nant ion manent 120 IV 3 How to Use the G1 to Collect Data on a Scripted ROUE Git fo cshe tes Obevet a e e a a a eae dvalicatate 123 IV 4 How to Download Data from a Completed Route from the CAO PROACH VG ge acre Snapearbecanmenetem nites E E A RURE E EN 138 IV 5 How to Use the G1 as a Stand Alone Voltmeter Waveform Analyzer Site Survey Program 66 140 SECTION V USING THE G1 IN STATIONARY DATA LOGGER APPLICATIONS Web Introductions ieai aah canes a sans ceo peo eee a ae ies 146 V 2 How to Set Up the G1 for Stationary Data Logger AppheatonsS errs cerei e raw cduwes tomate E E ERE a 148 V 3 How to Use the G1 as a Stand Alone Voltmeter Stationary Data Logger Program s sacses sacs ewediaa duets ccometasnetace 165 V 4 How to Download Stationary Data Logger Data from the G1 TOS REO ACUIVG aarete pine a s E bus Cannone eneeet cenns 171 Appendix 1 How to Configure Trimble G
65. al labeled as DCVG The cable connecting the G1 data logger to the Switch Box is connected to the 5 pin terminal labeled Meter on the Switch Box Finally the banana plug cable connecting the Hip Pack Trail Wire to the Switch Box is connected to the banana plug terminal labeled Structure on the Switch Box The GPS Antenna illustrated on the top side of the G1 in Figure 6 represents the antenna employed by the data logger s internal GPS receiver External GPS receiver units if employed would be connected to the data logger via one of the two USB COM terminals located on the bottom side of the G1 The right hand side COM Port COM 4 is recommended With either the internal unit or an external GPS unit the location of items such as flags devices geo features and anomalies can be recorded during the performance of combined surveys either manually by tapping on the Log GPS button on the survey screen at each critical location or automatically by pre programming the data logger as described in Section III 3 Step 13 How to Attach Cables and Accessories to the G1 Data Logger The terminals on the top side of the data logger for the various connections described above are illustrated in Figure 7 below 88 TOP SIDE OF G1 DATA LOGGER Screen Side GPS Antenna O O Terminal 3 Terminal 2 Terminal 1 Red Banana Plug Black Banana Plug 5 Pin Data Probe Terminal Terminal Connector Terminal USED TO
66. ata logger is reading the ON and OFF pipe to soil voltages at the Valve Site with respect to a copper copper sulphate reference electrode These voltages can be compared to the readings that were logged previously on 7 1 04 at this site see Prior Reading 133 field When the current readings are logged by tapping on the Read button these readings will be displayed in the Current Reading field As Found As Left Readings If you return to the same prompt and tap the Read button again the Current Reading will be renamed the As Found reading and the latest reading will be displayed as the As Left reading You can display the As Found reading using the F10 key on the G1 s keypad The As Found reading will be included in the Remarks field for this reading type in ProActive Data can also be entered manually by tapping on the Manual button and entering voltage values manually using the keyboard For instance you might measure these voltages for some reason using an independent voltmeter and this would be how you d enter such data Or you might wish to manually enter current and voltage data straight off of meters at rectifier sites rather than using the data logger to record the current and voltage values If on the ProActive side instructions had been entered for this prompt regarding how to make cable connections hook ups to perform the scripted measurements the Help b
67. ater Sampling SU11 Internal Corrosion SU11 Storage Well U11 Offshore Rig Show All O Show Nearest C Incomplete only _ Enable Interruption GPS on E As can be seen from the above Survey Info screen our example route contains 17 sites or 17 devices and the types of devices are listed on the window All 17 sites can be viewed by scrolling down the bar on the right hand side of the window This screen will indicate the date the site survey was started the Started field and will also show the date the survey was completed the Finished field As can be seen from the above screen none of the sites on this route have been examined as yet 0 of the total sites have been examined so far If some of the sites had been examined already there would be a number indicated in the Complete field If this were the case you might want to place a tick in the box labeled Incomplete only in which case only the sites that remain to be examined on the route would be listed on the above screen The number in the Non Compliant field which is presently zero will indicate the number of sites that are non compliant based on the readings that are logged on the survey relative to the allowed variances established during the scripting process on the ProActive side So for example if the allowed variance for a particular voltage is plus or minus 10 and your present reading is 15
68. be used by the data logger to determine average On and Off pipe to soil voltage values in the case where the voltmeter is scripted to read in the Min Max mode as opposed to the On Off DSP mode By default 4 sampled readings are used 126 You can elect to have 4 or 5 digits displayed for the voltmeter readings on the prompt screens by checking the 4 or the 5 radio button in the Voltmeter Digits field You can indicate the type if any of GPS Unit that you will be using on the survey By tapping on the pull down list arrow button in the GPS field the Survey Settings screen will appear as shown below AF Start GF 4 2 26 D Survey Settings AC Cycle Rate Moving Avg Cnt Voltmeter Digits 4 Os C Use Metric Apply changes to all surveys E As can be seen from the above screen there are 5 choices for GPS Type None This means that a GPS receiver is not being used MCM External This means that an external MCM GPS Accessory is being used NMEA This means that an NMEA 0183 compatible GPS receiver is being used Manual This means that location data will be entered manually when the GPS button is pressed on the prompt screens during a survey MCM Internal This means that the G1 data logger s internal GPS unit will be used a Garmin Model 15L WAAS enabled receiver 127 When using an external GPS unit you need to select the Com Port that you
69. 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 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 button and saving the reading or the flag button respectively Automatic Triggering of Readings When the Use Automatic Triggering box is checked the screen will be as shown below 25 Rectifier Mode Cycle ON OFF v Cane Buttons Allowed D C P None Save Survey Walking Direction Increasing O Decreasing C DCVG Sidedrains in CIS Surveys Use Automatic Triggering L Use Metric cancel next In the above case the flagging option is dis
70. button and then tapping on the Set Site Location button If a set of driving directions was entered on the ProActive side for this site the Driving Directions button would be active and by tapping on this button you could view information on how to locate this site By tapping on the OK button located in the top right hand corner of the screen you would be returned to the Site Info screen By tapping on the Prompt List button on the Site Info screen you can view the Prompt List for this Valve site 131 For our example SU11 Valve site the screen is as shown below Prompt List Site SU11 Valve Prompts Pipe to Soil Above Ground Condition Above Ground Corrosion Above Ground Coating Ground Level Condition Ground Level Corrosion Completed Prompts 0 Non compliant prompts O Next Site gt gt Goto Prompt E As can be seen from the above screen our scripted Valve has a total of 7 prompts Each prompt will come up in turn starting at the top of the list until all prompts for this site have had a response ie data have been entered The Goto Prompt button is used to initiate the batting order sequence Also when the Read button is tapped on each prompt screen to log data the next prompt screen in the sequence will come up Note You can navigate to previous or next sites or to previous or next prompts from a prompt screen by tap
71. copper sulphate reference electrode for a cathodically protected pipeline However if the pipe to soil potential is transient in nature ie changes as a function of time from the steady state value in some fashion it can be concluded based on whether the potential increases or decreases that stray current is either flowing to the pipe at the measurement location or is flowing away from the pipe at the measurement location at the times when the pipe to soil potential is transient If stray current flows away from the pipe at a particular location for a significant period of time it is possible that corrosion will be occurring at that location during that period of time despite the fact that the pipeline is otherwise cathodically protected There are a number of sources of stray current for buried pipelines including dc rail transit systems and dc welding equipment In addition telluric effects can generate stray current Telluric effects represent a natural as opposed to a man made source of transient stray current telluric current that is induced by transient geo magnetic activity transient disturbances in the earth s magnetic field Telluric effects are more pronounced at higher latitudes in higher resistivity soils and when higher quality coatings are used In addition to being a potential source of corrosion in locations where stray current leaves the pipeline transient stray current can also have a significant impact on pip
72. cted for example the screen shown below will appear 39 Name of P L Station Number 0 00 0 CIS Flag Read Count fo Dist Per Reading ft Dist Between Flags ft Number of Data Probes One Two Auto Pacing Mode E Step 19 Select Voltage Reading Interval Distance Per Reading By tapping in the field on the above screen labeled Distance Per Reading you can type in the voltage reading interval distance in feet or meters for the metric case expected between recordings Typically in CIS work this expected interval distance is 2 5 feet or 1 meter in the metric case Step 20 Select Survey Flag Interval Distance Between Flags By tapping in the field labeled Distance Between Flags you can type in the survey flag interval distance between survey flags for the section of pipeline being measured Typically survey flags are located at 100 feet intervals Note This option is disabled in the case of Automatic Triggering Also 2 5 feet or 1 meter is the automatic selection for Distance per Reading in the case of Automatic Triggering Step 21 Select the maximum permissible error between the actual number of recordings made between 2 survey flags and the expected number of recordings 40 By tapping in the field labeled CIS Flag Read Count you can type in the maximum permissible error For example the maximum permissible error is indicated as 20 on the above scre
73. d to identify the pipeline by its name with which the device is associated You can also enter a description of the location By tapping on the pull down list arrow button on the above screen you can select your choices of the Device Type and its Location by milepost station number or feet or you can check off the Use Metric box and enter location data by kilometer station number or meters After you make your selections tap on the OK button which will pull up the screen shown below 152 AJ start 42 28 ok Mode SialelERst Range 5 7 Y DC 400 MOhm v Interval 1 000 Seconds v AC Cycle Rate Internal Clack GPS Clock E Step 5 Select Voltmeter Range Reading Mode and Recording Interval The above screen is used to establish the mode in which the digital voltmeter will be operating during the application Remember the data being logged by the data logger are actually voltages that are measured by a voltmeter AC Cycle Rate As can be seen by tapping on the pull down list arrow in the AC Cycle Rate box you have two choices 60Hz and 50Hz Select the electricity supply frequency for the country in which you are operating the G1 data logger 60Hz for the U S Range A variety of voltmeter ranges full scale values for both AC and DC for Single Read cases and DC only for On Off Pairs cases and input impedance values are available and can be selected by tapping
74. data logger and secondly to perform your site survey by collecting the data dictated by your scripted route Step 1 Open the Site Survey Program on your G1 data logger In the case of the Q100 units tap on the Start button on the Home screen Today screen and then on the main menu tap on GISS In the case of the Q200 units double tap on the G1SS icon on the desktop or tap 123 on the start icon bottom left hand corner of the desktop tap on the Programs icon and tap on the G1SS icon In both cases Q100 and Q200 units the site survey screen shown below will be displayed 2 33p ok Franks SU101 Open Survey Delete Svy As can be seen there are several buttons on this Site Survey screen The Open Survey button will open up the highlighted route as discussed below in Step 3 The above screen will list all of the scripted routes that are currently stored on your G1 data logger s memory As can be seen from the above screen we currently only have the Franks SU101 route loaded onto our data logger The Delete Svy button will delete the highlighted route You can delete a route file once survey data have been uploaded to ProActive However route files can be stored on the G1 s CompactFlash memory card indefinitely Repeating the route download process to the G1 prior to performing a new site survey perhaps the next bi monthly survey will result in a ref
75. data logger would record the voltage value sampled 150 ms after the rectifier current was switched from the ON to the 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 Next 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 49 Finally 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 timing signal to associate voltage recordings with the actual time they were made With this voltmeter reading mode selected after tapping on the OK button the screen shown below will appear Read Mode Single Read GPS Timin Range The only addition information that needs to be supplied here is the type of GPS unit you will be using MCM internal or MCM external units ONLY which you can select by tapping on the GPS Settings button and
76. ded that you place a tick in the box labeled copy to local folder and identify the location on your hard drive where you d like the file to reside 172 Gatherer One Driver Time Chart Data Data Type Logger Dala Help Get Logger Data trom Gathere Une lf you have akeady moved your survey dale to the desktop computer check Use Local Folder and select the folder where il is located Use Local Folder WY Copy To Local Folder C ASDL Files Refresh Connecton Export to Excel Select the survey to upload then click on Go gt Go Ready versin 1 93 4 Mrimum G athsier One Version 1 0 0 The Driver screen will list all of the SDL files currently stored on your G1 You would highlight the SDL file that you would like to copy to your PC Note Each time you stop an application and re start the same application either manually or via the scheduling function a new file will be generated to separately store each segment of time stamped data within the same application Step 4 Examine Your SDL Data Prior to Posting the Data to ProActive It is suggested that you examine your SDL data prior to bringing the data into the Management Suite of ProActive currently you are in the Driver Section of ProActive To do so click on the cancel button on the window that is currently showing The Driver window will again be shown but this time there will be a selection of tabs o
77. ding mode requires a GPS receiver to be used and the GPS settings can be selected by tapping on the radial button labeled GPS Clock and then tapping on the GPS Settings button First though you should enter the On and the Off times associated with your rectifier current interruption system Our example above indicates 700ms On and 300ms Off for the current interruption cycle Next you should enter your selection of Recording Interval Again in the single read mode the shortest recording interval is 100ms To make your GPS settings selections tap on the GPS Settings button The screen shown below will appear EJ G1_PLS Downbeat Each Minute v Cycle Start On gt Off GPS Port MCM Internal v None MCM External NMEA Manual MEM Internal GPS Type E You are being asked here to make several selections First select the type of GPS unit you will be using currently only the MCM External and the MCM Internal GPS units can be used in this reading mode 157 Next select the COM Port for your GPS receiver The COM 4 Port will be selected automatically if you select the MCM Internal GPS unit For the case of the MCM External unit you have a choice between the COM 4 Port and the COM 1 Port It is recommended that you select the COM 4 Port to avoid potential conflict with ActiveSync which uses the COM 1 Port The COM 1 and COM 4 Ports are on the bottom side of the G1 the COM 1 Port is on t
78. e 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 G1 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 our CIS Training Manual G1 Version Step 1 Switch on the G1 by pressing the power button red key on keyboard Assuming that the battery pack is charged see Section II the screen will light up and will display the home screen Today screen in the case of the Q100 units and the desktop screen in the case of the Q200 units The startup screens for the Q100 and the Q200 units are illustrated below Q100 Units Monday June 06 2005 Tap here to set owner information Q200 Units GISDL Transcriber Computer G1GPS Internet Explorer ay ap a GIPLS My Documents od PuRMCM 4 JF c gt 4 27 PM Zz E Step 2 In the case of the Q100 units tap on the Start button on the Home screen This will pull up the main menu Step 3 In the case of the Q100 units tap on the G1 PLS button on the main menu In the case of the Q200 units double tap on the GIPLS icon on the desktop or tap on the start icon bottom left hand corner of desktop tap on the Programs button and tap on the G1PLS button
79. e either Port A or Port B for NMEA data output The important issue with regard to the XR and XRS receivers is the connection cable itself If you would like the G1 unit to signal the GPS receiver when GPS tracking is required by the G1 during particular survey applications you would select cable number 30231 00 to connect the receiver to the G1 186 This is a power saving mode of operation for the GPS receiver since when GPS tracking is not required by the G1 the GPS receiver will be in sleep mode which is a low battery power consumption mode Conversely if you d like the GPS receiver to be continuously tracking the GPS signals at all times you would select cable number 30945 With this cable the G1 does not control when the receiver is in GPS tracking mode but rather the receiver will begin tracking as soon as battery power is applied and will continue to track until the battery power is switched off This would represent the maximum battery power consumption mode for the receiver With regard to the Power receiver which only has one physical terminal but you can connect to either Port A or Port B internally depending on which cable you select you would configure Port B for NMEA data output by selecting cable number 40492 assuming that you wanted to have the G1 signal the receiver to perform GPS tracking only when GPS data is required by a survey application Alternatively you would configure Port A using cable nu
80. e to soil potential values recorded during the course of a close interval potential survey CIPS or CIS which can lead to misleading survey data 147 Steps can be taken however to correct for such effects by using multiple data loggers operating in the stationary mode coupled with stationary reference electrodes positioned at test points strategically along the section of pipeline that is being surveyed By doing so time stamped pipe to soil potential data recorded by the stationary data loggers can be compared to similarly time stamped pipe to soil potential data collected during a CIS using moving reference electrodes By applying appropriate correction factors any spurious CIS data associated with transient stray currents can be filtered out of the survey data in ProActive It should be noted however that for correction factors to be determined the stationary data logger data and the CIS data must both be GPS time stamped Again the G1 1s ideally suited to function as a stationary data logger and the procedures involved with setting up the G1 to collect time stamped potential data are detailed below V 2 How to Set Up the G1 for Stationary Data Logger Applications The following section outlines the process required to set up the G1 to record potential data at a fixed location over a prescribed period of time using a prescribed time interval with recorded data being time stamped ie the actual time
81. ection pertains to the GPS receiver that you will be using in conjunction with your G1 data logger The GPS receiver can be called upon to record the precise location of Flags Devices and Geographical Features that are encountered during a CIS As can be seen from the above screen there are 5 choices for GPS Type None This means that a GPS receiver is not being used MCM External This means that an external MCM GPS Accessory is being used NMEA This means that an external NMEA 0183 compatible GPS receiver is being used Manual This means that location data will be entered manually when the GPS button is tapped on the survey screen during a CIS MCM Internal This means that the G1 s internal GPS unit will be used a Garmin Model 15L WAAS enabled receiver Select the appropriate choice by tapping on your selection 36 When using an external GPS unit you need to select the Com Port that you ll be using on the G1 see above screen The connector terminal on the left hand side of the data logger facing the bottom side is the COM 1 Port and the terminal on the right hand side is the COM 4 Port It is recommended that you select the COM 4 Port for your external GPS unit in order to avoid potential conflicts with ActiveSync which uses COM 1 Step 17 Select GPS Options Acris GF 4 9 38 GD Max Far Near Diff wo AC 60 Hz Low Y Alarm 9999 9999 No Alarm GPs aw intema _ Differen
82. ed would be connected to the data logger via one of the two COM terminals located on the bottom side of the G1 The right hand side COM Port COM 4 is recommended With either the internal unit or an external unit the location 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 data logger as described above in Section III 1 Step 17 55 How to Attach Cables and Accessories to the G1 Data Logger The terminals on the top side of the G1 data logger for the various connections described above are illustrated in Figure 3 TOP SIDE OF G1 DATA LOGGER Screen Side GPS Antenna O O Terminal 3 Terminal 2 Terminal 1 Red Banana Plug Black Banana Plug 5 Pin Data Probe Terminal Terminal Connector Terminal CONNECTS TO CONNECTS TO DUAL HIP PACK NOT USED PROBE ADAPTER Figure 3 Connection terminals on top side of the G1 The 5 pin Data Probe Connector Terminal is shown above as Terminal 1 As discussed above the reference electrode canes are connected to this terminal via the dual probe adapter Again the reference electrodes are effectively connected to the negative side of the data logger s voltmeter when black band data probe cables are used Consequently the black banana plug terminal Terminal 2 is not used when push button canes are
83. ed to be compatible with the G1 using a software program called the GPS Pathfinder Controller The 4 receiver models are GPS Pathfinder Pro XR GPS Pathfinder Pro XRS GPS Pathfinder Power GPS Pathfinder Pocket MCM supplies a copy of the GPS Pathfinder Controller software program which you can use to configure your particular GPS Pathfinder receiver and this program is available on your G1 Installer CD The GPS Pathfinder Controller program is contained in the folder labeled Trimble GPS on the CD that came with your G1 By double clicking on the Trimble GPS folder a number of files will be available to you as shown in the window below 180 a G1 Install PC Installer For Pathfinder nstaller Controller a PFCwin pdf TechNote _PFController NMEA Adobe Acrobat Document Adobe Acrobat Document Adobe 316 KB 27 KB Using Trimble Pathfinder GPS with the MCM DAMeter txt As can be seen from the above window two PDF files are part of this package These PDF files are Trimble manuals that describe in detail the GPS Pathfinder Controller software program You can double click on these icons to view these documents In addition you will see 2 yellow folders which are labeled PC Installer For Pathfinder Controller and G1 Installer You have the option of installing the GPS Pathfinder Controller program on either your PC or laptop or on your G1 itself Actually you can instal
84. election Next enter your On Delay and your Off Delay selections by tapping in the appropriate filed 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 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 the 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 112 Next select your current interrupter s Downbeat timing 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 The Each Minute designation indicates to the data logger that a new interruption cycle will begin at the top of each minute
85. elocity Filter Receiver Power Output Select the COM1 port for the GPS Receiver Port and leave the Productivity check box checked 194 Next use the scroll bar to reveal the NMEA Output field and select On for this option Step 9 Click on the wrench button on the above screen right hand side screen bottom right which will pull up the screen shown below left hand side screen wi GPS Controller i GPS Controller 5 63 na 5 63 Setup v 9 Setup 7 9 NMEA Output Settings A Cancel 1 OK Cancel Output Interval Receiver Port Primary Port 1 Port 1 Seria R E Secondary Baud Rate Data Bits Stop Bits Parity i a a ss i General ALM Next make the selections indicated on the screen above left hand side screen Next use the scroll bar to scroll down to reveal the screen shown above right hand side screen and select GGA only as the NMEA string type Next click on the OK button on the NMEA Output Settings screen and then click on the OK button on the GPS Settings screen which will return you to the Setup screen Step 10 Click on the Real time Settings button on the Setup screen which will pull up the screen shown below 195 wi GPS Controller Setup ad Real time Settings k Cancel Choice 1 Integrated SBAS Choice 2 Use Uncorrected GPS w Real time Age Limit imn Next under Choice 1 select Integrated
86. employed together with black band cables The red banana plug terminal for connection to the hip pack is shown as Terminal 3 This will establish connection to the positive side of the data logger s voltmeter 56 The GPS Antenna shown above is employed by the data logger s internal GPS unit External GPS units are connected to either the left hand side COM Port COM 1 or the right hand side COM Port COM 4 located on the bottom side of the data logger As mentioned above in Section III 1 the COM 4 Port is recommended to avoid conflict with ActiveSync III 3 How to Set Up the G1 for DCVG Survey Applications The following section outlines the steps required to setup the G1 data logger to participate in DCVG pipeline survey 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 DCVG application The setup process and this is very important also establishes a file in which the voltage recordings survey data will be stored At the completion of the survey DCVG survey data can then be retrieved by a PC that is in communication with the data logger by accessing the file in which the survey data are stored Step 1 Switch on the G1 by pressing the power button red key on keyboard Assuming that the battery pack is charged see Section II the screen will light up and will display the home screen
87. en If the recording interval is expected to be 2 5 feet and the survey flag separation is 100 feet that 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 22 Select whether or not you would like the recordings to be uniformly spaced between survey flags in cases where less than or greater than 40 recordings are taken By tapping in the box labeled Auto Pacing Mode and inserting a tick in the box you will enable the data logger to automatically adjust the actual recordings and space them evenly over a 100 feet span distance between survey flags regardless of the actual number of recordings made This setting is recommended Step 23 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 the two radial button in the field labeled Number of Data Probes Step 24 Provide the Name of the Pipeline By tapping in the field labeled
88. entified 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 SP 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 SP survey 93 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 7 Tap once on the OK button The screen shown below will appear Agl ci_ris 46158 vr Survey Type ieee ts Rectifier Mode Cycle ON OFF X Cane Buttons Allowed D C P Survey None Left Right Save Flag Read E Survey Walking Direction Increasing Decreasing C Use Metric E Step 8 Select Survey Type The 5 available survey types can be seen by tapping on the pull down list arrow in the Survey Type box as shown on the screen below 94 Trigger CIS v Continuous CIS Rectifier Mode MUDL Iciaiets DCVG Cane Bu DcY G CIS Surface Potential Left Right Flag Read X Survey Walking Direction Increasing Decreasing C Use Metric Survey Type Cancel Next Ej Tap on Surface Potential to select a Surface Potential survey type The scree
89. er s battery power at any given time can be checked to make sure that the battery has sufficient charge to conduct a survey or to run an SDL application The procedure used to check battery status is provided below How to check the battery status Q100 Units gt Tap on the Start button on the Home screen Today screen gt Tap on Settings on the main menu gt Tap on the System tab at the bottom of the screen gt Tap on the Handheld Settings icon gt View battery status Q200 Units gt Tap on the Start button bottom left hand corner of desktop gt Tap on Settings on the main menu gt Tap on Control Panel gt Double tap on the Power icon gt View battery status Battery Status Indications If the main battery status is shown as High your battery should not need charging in the next few hours If the status is shown as Low you should consider charging the battery within the next few hours or so However if the status is shown as Critical you should switch out or re charge the battery immediately When you switch out the main battery pack you will not lose the Operating System s registry or the application programs assuming that the back up battery is charged In addition you will not lose your survey or SDL data which are stored on a non volatile CompactFlash memory card II 2 How the GPS Receiver Unit is Switched ON and How its Internal Bat
90. erating 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 above screen 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 box 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 8 Trigger mode or Continuous timer mode If the Trigger CIS mode is selected and the Use Automatic Triggering box is not checked the screen will appear as shown below Aci Pus 42 06 ok Survey Type Trigger CIS X Rectifier Mode Cycle ON OFF v Cane Buttons Allowed D C P Survey None Left Right Save Flag Rea Flag Read Survey Walki i Ti Increasing Read Read C Use Metric 24 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
91. ere 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 As an example if you are working on pipeline ABC within valve segment 45 and you are about to begin a Surface Potential survey at station number 12 00 0 your screen would be as shown below 102 Name of P L Valve Segment CIS Flag Read Count fo Dist Per Reading ft Dist Between Flags ft Auto Pacing Mode E Step 16 Select Voltage Recording Interval Distance Between Recordings By tapping in the field on the above screen labeled Distance Per Reading you can type in the voltage reading interval distance in feet or in meters for the metric case expected between recordings for the Surface Potential survey Step 17 Select Survey Flag Interval Distance Between Survey Flags By tapping in the box on the above screen labeled Distance Between Flags you can type in the survey flag interval distance between survey flags in feet or in meters for the metric case for the section of pipeline being measured Typically survey flags are located at 100 feet intervals Step 18 Select the maximum permissible error b
92. es 700ms On and 300ms Off for the current interruption cycle Next you should enter your selection of Recording Interval For this reading mode the shortest recording interval is the period of the waveform cycle which in our case is 1 second Also in this case you would tap on the GPS Settings button which would bring up the screen shown below EJ G1_PLS Downbeat Each Minute v Cycle Start On gt Off GPS Port MCM Internal v None MCM External GPS Type MCM Internal E You are being asked here to make several selections First select the type of GPS unit you will be using currently only the MCM External and the MCM Internal GPS units can be used in the GPS Sync voltage reading mode and the COM Port you will be using for your GPS receiver COM 1 or COM 4 Again the COM 4 Port is recommended to avoid potential conflict with ActiveSync 162 Next enter your On Delay and your Off Delay selections by tapping on the appropriate box 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 example if 150 ms was selected for the Off Delay the data logger would record the voltage value sampled 150 ms after the rec
93. etake 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 14 Select Local Electricity AC Frequency By tapping on the pull down list arrow button in the AC System field on the screen shown above you will have the choice of 60Hz or 50Hz AC Select 60Hz for all U S applications by tapping on 60Hz Step 15 Select Beeping or Alarm Voltage By tapping in the Beep if below field on the above screen a voltage value can be entered for example 0 850 With this value entered the G1 will beep to alert you to the fact that a voltage reading lower more positive 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 16 Select the GPS Accessory Being Used If Any 35 By tapping on the pull down list arrow button in the GPS field on the above screen the screen shown below will appear Max Far Near Diff of AC System Beep if below 9999 7 9999 Never Beep cps acm inter hone S Required MCM External Ititude H NMEA ge Manual retiree ature E This sel
94. etric the reading interval distance between voltage recordings and the survey flag internal survey flag spacing will be displayed in meters as opposed to feet Tap on the Next button on the above screen Step 12 Select GPS Type By tapping on the pull down list arrow button in the GPS field you can select the type of GPS unit you will be using if any from the list shown below 97 GF i345 ok Manual Brice Internal Log GPS at Flags Log GPS DCP Feature Log GPS at Sidedrain Anomaly As can be seen from the above screen there are 5 choices for GPS Type None This means that a GPS receiver is not being used MCM External This means that an external MCM GPS Accessory is being used NMEA This means that an NMEA 0183 compatible GPS receiver 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 DCVG survey MCM Internal This means that the G1 s internal GPS unit will be used a Garmin Model 15L WAAS enabled receiver Select the appropriate choice by tapping on your selection When using an external GPS unit you need to select the Com Port that you ll be using on the G1 see above screen The connector terminal on the left hand side of the data logger facing the bottom side is the COM 1 Port and the terminal on the right hand side is the COM 4 Port It is recommended that you select the COM 4
95. etween the actual number of recordings made between 2 survey flags and the expected number of recordings 103 By tapping in the field labeled CIS Flag Read Count you can type in the maximum permissible error For example the maximum permissible error is indicated as 20 on the above screen If the recording interval is expected to be 5 0 feet and the survey flag separation is 100 feet that means that 20 recordings are expected If however only 15 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 16 recordings and a maximum of 24 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 less than or greater than 20 recordings are made By tapping in the box labeled Auto Pacing Mode and inserting a tick in the box you will enable the data logger to automatically adjust the actual recordings and space them evenly over the flag spacing distance regardless of the actual number of recordings made Again enabling this selection is recommended Tap on the Next button on the above screen The screen shown below will appear 104 Technicia
96. ext button on the above screen The screen shown below will appear Technician Name Comments Description a Survey Name Compact FlashiMy Doc Start Date 6 6 05 15 09 28 PM i Previous 43 Step 28 Provide the Work Order Number for the CIS By tapping in the field labeled Work Order you can type in the work order number for the CIS Step 29 Provide Your Name By tapping in the field labeled Technician Name you can type in your name Or you can type in the name of a supervisor and add your name in the comments section Step 30 Provide Comments By tapping 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 above screen are the Survey File Name CompactFlash card file identification name and the Start Date and Start Time of the survey Note Do not attempt to change the Survey File Name indicated here as this identification will be required by the ProActive software to upload your CIS data to your PC Step 31 Make Voltmeter Reading Mode and Current Interruption Cycle Selections Tap on the Next button on the above screen The screen shown below will appear 44 AJ c1_pis RESER Read Mode On Off Pairs DSP moc Range 5 7 YDC 400 MOhm v On Off cy ms Ej Voltmeter Reading Mode The
97. field Current is always displayed in Amps DCVG This voltmeter reading mode would be selected if you were set up to perform a DCVG survey with the reference electrodes connected to the G1 as illustrated in Section III 4 By switching to the stand alone voltmeter you can view the delta V ON and delta V OFF readings as well as the calculated by the G1 software value for the DCVG voltage delta V ON delta V OFF See our DCVG Training Manual G1 Version The screen shown below is an example screen for operation in the DCVG reading mode 114 Range 5 7 VDC 400 MOhm Read Mode DVCG on rs OFF rox 550 Stop Voltmeter E As can be seen from the above screen the delta V ON reading is 59 6mV and the delta V OFF reading is 16 5mV Consequently the DCVG voltage is 76 1mV This is an example of a cathodic anodic anomaly in which case current is flowing away from the pipe at the defect location into the soil during the OFF part of the current cycle but the defect is cathodically protected when the impressed CP current is ON current is flowing to the defect location This is important information that can be obtained with the G1 in this DCVG voltmeter reading mode without having to go through the process of marking a defect as is the case when you are performing an actual DCVG survey see our DCVG Training Manual G1 Version The Set Zero button on the above screen a
98. file in which the GPS data will be stored By tapping on the OK button the screen shown below will appear for the case of an example file by the name of MCM Sites Description AJ Start 46225 Data Folder My Documents Filename MCM Sites Latitude No Data Longitude No Data Altitude No Data Sat In Use No Data GPS Mode No Data PDOP No Data EPE No Data Fix Time No Data Desc Test Station 1 Settings NMEA Data b about toa You can provide a description of the location for which you are planning to log position data by tapping in the field labeled Desc and entering a description The above screen shows Test Station 1 as an example location description You would then be in a position to log GPS position data by tapping on the Log button on the above screen Alternatively you could open a previously saved file by tapping on the Open survey button as opposed to tapping on the New survey button In this case you could elect to open a file that you had previously saved by selecting a file name from the drop down list on the screen shown below 15 Ag start 46222 E By selecting a previously saved file you could for example continue to add GPS position data to an existing file that you had set up previously How to view saved data If you set up a file as described above and you logged GPS position data at one location or multiple
99. files one set of files for each application under the filenames that you assigned to them during the G1 data logger s setup process described above in Section V 2 The SDL data stored in each file can be downloaded independently to a PC for storage and data management The software required to download SDL data from the G1 to your PC and to subsequently manage your SDL data is the ProActive program Step 1 Connect a communication cable between the G1 s COM 1 Port left hand side 26 way terminal and your PC and switch on your G1 With Microsoft s ActiveSync installed the ActiveSync window will appear on your desktop and the program will confirm that two way communication has been established Step 2 Open the ProActive program on your PC and click on the Tools button on the main menu bar Then click on Data Logger and click on Time Charts The window shown below labeled Data Logger Get Time Chart Data will appear 171 Data Logger Get Time Chart Data Data Logger anaa Status READY Step 3 Select GATHERERONE for G1 by tapping on the pull down list arrow button in the Data Logger field and clicking on GATHERERONE Click on the Go button on the above window which will pull up the Driver window as shown below Next select the Logger Data option in the Data Type field In order to permanently save the uploaded SDL file on your PC it is recommen
100. g Direction Increasing O Decreasing C DCVG Sidedrains in CIS Surveys Use Automatic Triggering C Use Metric E As can be seen from 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 12 Tap on the Next button following your selection of Rectifier Mode 33 The screen shown below will appear GF d 9 38 Max Far Near Diff 5 o AC 60 Hz Low Y Alarm 9999 9999 No Alarm _ Differential GPS Required Use GPS for Altitude Log GPS at Flags Log GPS DCP Feature E Step 13 Make Selection 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
101. gmentation System WAAS corrects for GPS signal errors caused by ionospheric disturbances timing and satellite orbit errors This system which was developed by the FAA and the DOT consists of approximately 25 ground reference stations positioned across the United States hence the Wide Area designation that monitor GPS satellite data Two master stations located on either coast collect data from the reference stations and create a GPS correction message This correction accounts for GPS satellite orbit and clock drift as well as signal delays caused by the atmosphere and ionosphere The correction message is broadcast through one of two geostationary satellites positioned over the equator and is picked up by the WAAS receiver Currently WAAS satellite coverage is only available in North America although other governments are developing compatible systems around the world Also it should be noted that for some users in the United States the position of the two broadcast satellites over the equator makes it difficult to receive the correction message signal when trees or mountains obstruct the view of the horizon In these cases in the absence of a WAAS correction message the G1 s internal GPS unit will process standard uncorrected GPS data with an associated loss of accuracy Please see Appendix 1 for information on using non WAAS external GPS receivers in conjunction with the G1 SECTION I OPERATIONAL ITEMS II 1 Batter
102. he left hand side and the COM 4 Port is on the right hand side looking screen side up Next enter your On Delay and your Off Delay selections by tapping on the appropriate box and typing in the selected delay time in milliseconds These delay time values are used to establish the zones of the cyclic pipe to soil waveform For instance you might determine prior to beginning the SDL application that there is significant spiking in the pipe to soil waveform following On to Off and Off to On transitions see Section V 3 In this case you could select Off Delay and On Delay times to correspond to the times required for steady state Low and High voltages to be attained By doing so you would be identifying the zones on the cyclic waveform that contain the spiking Consequently since in the Cycle zone tag reading mode voltage data are tagged with the zone of the cycle in which the data was recorded you would be in a position for example to reject data that is recorded in the zones where you know that spiking is occurring Finally select your current interrupter s Downbeat timing 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
103. he pipe the DCVG voltage will be zero ie neither positive nor negative see our DCVG Training Manual G1 Version Also with respect to the above active survey screen as DCVG voltages are recorded by the data logger the Total Distance total distance from the start of the survey parameter will increase in increments of 5 0 feet or whatever the Distance Per Reading value was that was entered back at Step 17 Distances would be in meters for the metric case Also the Distance From Flag parameter will increase in the same increments as voltages are recorded The difference in this case however will be that when each survey flag is registered this distance parameter will begin again at zero In other words this will show the distance you are assumed by the data logger to have traveled from the last flag that you encountered and registered You are now ready to perform a DCVG Survey You are referred to our DCVG Training Manual G1 Version for information and recommendations on how to actually perform DCVG Surveys using the G1 data logger This Training Manual also provides an overview of the physical principles associated with DCVG Surveys 78 II 4 How to Connect the G1 Data Logger with the other Test Equipment for DCVG Survey Applications The cable connections for DCVG surveys employing MCM test equipment are illustrated below in Figure 4 Pipeline GPS Antenna wo Dual Probe Adap
104. highlighting the appropriate type of GPS unit Current Interruption Cycle 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 50 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 Step 32 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 fast cycle rectifier current interrupted applicat
105. in Data Probe Connector Socket is shown above as Terminal 1 As discussed above the reference electrode canes are connected to this terminal via the dual probe adapter Again the reference electrodes are effectively connected to the positive green handled cane or negative red handled cane sides of the voltmeter with this connection Consequently the red and black banana plug terminals Terminals 2 and 3 are not used in this DCVG survey application However the red banana plug terminal Terminal 3 is used to connect temporarily a test cable between the Gland a test station TS in order to record pipe to soil voltages and voltage waveforms prior to beginning a DCVG survey see DCVG Training Manual G1 Version The GPS Antenna shown above is employed by the data logger s internal GPS unit External GPS units are connected to either the left hand side COM Port COM 1 or the right hand side COM Port COM 4 located on the bottom side of the data logger As mentioned above in Section III 3 the COM 4 Port is recommended to avoid conflict with ActiveSync 81 HMI 5 How to Set Up the G1 for Combined DCVG CIS Survey Applications Introduction It is possible to collect both DCVG survey data and CIS data from a section of pipeline on a single pass by using the MCM Switch Box in conjunction with the G1 data logger In this combined survey mode at each measurement location the DCVG data are first recorded and then the Switch Box
106. ion data 99 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 survey applications Log GPS at Flags If this box is ticked GPS position 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 at 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 registered Log GPS at Sidedrain Anomaly If this box is ticked GPS location data will be logged automatically when SP anomalies are marked as described in our Surface Potential Surveys Training Manual G1 Version 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 F ci_pis GF 4 s48 Ook o Ac er v Auto Log GPS amp Never _ Differential GPS HES lEvery Reading C Use GPS for AltitlEvery 2 Readings Log GPS at Flags Every 5 Readings Log GPS ocp Fel amp very 10 Readings Log GPS at Sidedrain Anomaly E 100
107. ions 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 33 Pull Up Active Survey Screen 51 Tap once on the OK button on the Voltmeter Read Mode screen or the GPS Settings screen if the GPS timing signal will be involved in the timing of voltage recordings which will pull up the Survey screen shown below assuming that you have not selected the Use Automatic Triggering option oun ai Fla PEPEN ae a Log GPS station 0 0 0 Total Dist eee Dist From Flag a m 5 C Geo Feat s500 Read 0 000 GPS Status No Data Survey Options Help VM y5 E As voltages are recorded by the data logger by either tapping on the Read button on the Survey screen or by pressing the appropriate data p
108. is the left hand 26 way terminal on the data logger and COM 4 is the right hand terminal COM 4 is recommended which frees up COM 1 for ActiveSync Select Button The storage location folder for a GPS data file is the My Documents folder which exists on both the CompactFlash memory card and on the main memory You can add a sub folder which you can name by tapping on the Select button and adding a new folder Your GPS position data file would then be stored in this sub folder inside of the My Documents folder By tapping on the Save button on the Settings screen you will be returned to the GPS data screen shown below AF start GF 44 3 22 ok Data Folder My Documents Filename Latitude No Data Longitude No Data Altitude No Data Sat In Use No Data GPS Mode No Data PDOP No Data EPE No Data Fix Time No Data Desc new oen E The data parameters are self explanatory with the exception of the PDOP and EPE parameters These acronyms stand for Position Dilution of Precision and Estimated Position Error available with Garmin receivers only These data provide position accuracy information Filename You can set up a file to store the logged GPS data by tapping on the New survey button on the above screen This will pull up the screen shown below F Start GF 4 3 27 Enter New GPS Data Filename E You are being asked here to enter a name for the
109. ist provided Next you would make an entry in the Description field Note This is an important entry as you will be effectively naming your site survey here Since you will build up a history of surveys done on a particular route over time you might want to develop a naming system for surveys associated with a particular route 139 Finally the start date the date that data were recorded at the first site on the route and the last date the date that data were recorded at the last site on the route will be entered automatically based on the data When all of the above entries have been made you would click on the Go button which would initiate the survey data copying process to ProActive IV 5 How to Use the G1 as a Stand Alone Voltmeter Waveform Analyzer Site Survey Program The G1 data logger can be used as a stand alone voltmeter waveform analyzer in situations where such applications maybe warranted For example at sites on your scripted survey where you can make electrical contact with the pipeline you might wish to confirm that the CP rectifiers are switching On and Off at the prescribed cycle rate and that the IR drop magnitude is sizable enough for the On Off reading mode to be applicable for example Also you might want to make sure that all of the rectifiers having an affect on the pipelines involved with your site survey are being switched On and Off in a synchronized fashion
110. l the program on both your PC and your G1 if you wish Your Trimble receiver unit will have to be connected to which ever computer your PC or your G1 a handheld PC onto which you have installed the Controller program in order that the GPS receiver can be configured with your settings In this regard it would be advantageous to have the Controller program installed on your G1 data logger since in this case you could make any adjustments in the field to the GPS receiver settings if required directly on the G1 itself In addition you could check on GPS position and receiver status right on the G1 at anytime The Installation Programs available on your CD allow you to install the Controller software on your PC or laptop and or on your G1 181 b How to Install the GPS Pathfinder Controller Software Program onto your PC The first step is to double click on the icon labeled PC Installer for Pathfinder Controller The next step is to follow the instructions associated with the Installation Wizard that will guide you through the simple installation procedure At the conclusion of the process the GPS Pathfinder Controller software program will be installed on your PC s hard drive or another location of your choosing and a short cut icon will appear on your desktop screen You can now at anytime connect your GPS Pathfinder receiver unit to your PC or laptop via the COM 1 Port on the G1 which is the 26 Way
111. ld be in meters if the metric option had been selected Also the Distance From Known Station parameter will increase in the same increments as voltages are recorded The difference in this case however will be that when a 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 G1 data logger to have traveled from the last known station that you encountered and registered You are now ready to perform a Surface Potential survey You are referred to our Surface Potential Training Manual G1 Data logger Version for information and recommendations on how to actually perform SP Surveys using the G1 data logger This Training Manual also provides an overview of the physical principles associated with SP Surveys II 8 How to Make Changes to Your Pipeline Survey Set Up Selections Once you ve set up the G1 data logger for a particular pipeline survey as described above you can make changes to your setup selections with the exception of your Survey Type selection and the currently indicated Station 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
112. ld on the above screen labeled Distance Per Reading you can type in the voltage reading interval distance in feet or in meters for the metric case expected between recordings for the DCVG survey In DCVG work this expected interval distance is typically 5 0 feet Step 18 Select Survey Flag Interval Distance Between Survey Flags By tapping in the box on the above screen labeled Distance Between Flags you can type in the survey flag interval distance between survey flags in feet or in meters for the metric case for the section of pipeline being measured Typically survey flags are located at 100 feet intervals Step 19 Select the maximum permissible error between the actual number of recordings made between 2 survey flags and the expected number of recordings 70 By tapping in the field labeled CIS Flag Read Count you can type in the maximum permissible error For example the maximum permissible error is indicated as 20 on the above screen If the recording interval is expected to be 5 0 feet and the survey flag separation is 100 feet that means that 20 recordings are expected If however only 15 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 16 recording
113. led Name of P L you can type in the pipeline name Note This is not the same as the filename for the DCVG survey that was selected back at Step 6 This is the actual name of the pipeline Provide the Valve Segment Identification Number By tapping in the field labeled Valve Segment you can type in the valve segment name or number if known Provide the Starting Location Provide the Starting Location for the Survey 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 As an example if you are working on pipeline ABC within valve segment 45 and you are about to begin a DCVG survey at station number 12 00 0 your screen would be as shown below 69 Pees Cok Name of P L Valve Segment CIS Flag Read Count fo Dist Per Reading ft Dist Between Flags ft Auto Pacing Mode E Step 17 Select Voltage Recording Interval Distance Between Recordings By tapping in the fie
114. ll be using on the G1 see above screen The connector terminal on the left hand side of the data logger facing the bottom side is the COM 1 Port and the terminal on the right hand side is the COM 4 Port It is recommended that you select the COM 4 Port for your external GPS unit in order to avoid potential conflicts with ActiveSync which uses COM 1 If you would like to have GPS Altitude Data collected in addition to GPS Position Data the box labeled Use GPS Altitude should be checked If you are working in a country where the Metric System is used you can check the Use Metric box In this case mileposts and station numbers will be in kilometers and meters respectively Finally you can select to show either mileposts or station numbers or both at your data collection points by checking the appropriate boxes on the Survey Settings screen By tapping on the OK button on the above screen you will be returned to the Route Selection screen Step 3 Select the Scripted Route on which you are about to embark By tapping on highlighting a scripted route on the route selection screen and tapping on Open Survey the Survey or Route Info screen for that particular survey route will appear For our example route entitled Franks SU101 this screen is as shown below 128 Survey Info Survey Franks SU101 Started Finished Sites 17 Complete 0 0 Non Compliant O SU11 W
115. locations you can view the saved data by accessing the file on the G1 using ActiveSync To do so you would connect the G1 to your PC using the COM 1 Port left hand terminal switch on the G1 and make sure that you had an ActiveSync connection Next you would double click on the following icons on your PC My Computer Mobile Device My Pocket PC and My Documents Next you would locate the text file your filename txt and copy the text file to a folder on your PC such as your My Documents folder You can then open the file to display the saved GPS position data For instance the window shown below illustrates an example in which GPS position data were logged at two locations Test Station 1 and Test Station 2 and the data saved in a file named MCM Sites From left to right the data displayed are date time of position fix latitude longitude altitude GPS status standard or differentially corrected number of satellites in use the PDOP the EPE and finally the description of the location provided by you SECTION III USING THE G1 DATA LOGGER TO PERFORM PIPELINE SURVEYS III 1 How to Set Up the G1 for CIS Applications The following section outlines the steps required to setup the G1 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 th
116. lso represents a useful feature By placing the reference electrodes on the ground close together away from any voltage gradient fields and tapping on the Set Zero button the voltmeter will eliminate any offset that might exist between the two reference electrodes which is important when measuring potential differences between two electrodes as is the case in DCVG surveys DCVG GPS Sync This voltmeter reading mode is similar to the DCVG reading mode described above except that in this case the High and the Low 115 voltages are sampled each cycle at precise times controlled by GPS receivers Again as was the case with the ON OFF GPS Sync reading mode this mode can only be selected if you are using either the Internal GPS unit or the MCM External GPS unit on the G1 AND you are using rectifier current interrupters with integrated GPS units If this mode is selected the GPS Settings button will again appear as was discussed for the case of the ON OFF GPS Sync mode The GPS Settings selections will have to be made as described above for the ON OFF GPS Sync mode option Waveform Analyzer A second application of the stand alone voltmeter is as a waveform analyzer To use this function either tap on the Waveform button WAVE button at the bottom of the Survey screen or tap on Options and then tap on Wave The screen shown below will appear depending on the previous settings r 5 7VDC 40
117. mber 30945 if you wanted to have the receiver to always be tracking the GPS signals when battery power is applied even when GPS data is not required by the G1 Finally for the Pocket receiver you must configure Port B for NMEA data output and you must connect to the G1 using the standard Pocket receiver cable supplied by Trimble The Pocket receiver can only track the GPS signals when prompted to do so by the G1 unit In other words the Pocket receiver needs a control signal from an external unit in our case the G1 to be turned on Example The following is an example of how you would configure Port A on the receiver unit for NMEA output If you select to configure Port A by clicking or tapping on Port A Settings the window shown below will appear 187 Port A Settings Protocols Input Baud Output Baud NMEA amp RTCM zy NMEA amp CMA Data Bits i Stop Bits Parity Cancel Step 5 Click or tap on the pull down list arrow button in the field labeled Protocols on the above window and select NMEA The window shown below will appear Port A Settings Protocols Input Baud Output Baud Data Bits Stop Bits Parity None s omen Select the output baud rate for the receiver and the other communications settings required to match the G1 s requirements The settings on the Port A Settings window shown above should be as follows Output Baud Rate 4
118. n Name Comments Description f Survey Name Compact Flash My Doc Start Date 6 7 05 10 23 06 AM E Step 20 Provide the Work Order Number for the Surface Potential survey By tapping in the field on the above screen labeled Work Order you can type in the work order number for the SP survey Step 21 Provide Your Name By tapping in the field labeled Technician Name you can type in your name or the name of your supervisor If you use your supervisor s name here you might add your own name in the Comments Section Step 22 Provide Comments By tapping 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 above screen are the Survey File Name and the Survey Start Date and Time 105 Note Do not attempt to change the File Name indicated here as this identification will be required by the ProActive software to transfer your Surface Potential survey data to your PC Tap in the Next button on the above screen The screen shown below will appear GF 4 4 02 Read Mode Single Read v Range Step 23 Select Voltmeter Settings Select the Read Mode SP surveys are typically performed on pipelines that are not cathodically protected with impressed current from rectifier sources and so the appropriate choice of Read Mode would be
119. n shown below will appear Rectifier Mode Always ON Cane Buttons Allowed D C P Survey None Left Right Save Flag Read z Survey Walking Direction Increasing O Decreasing Soil Resitivity Distance Units O cm Gm C Use Metric Cancel Next Ej 95 Step 9 Select Rectifier Mode A menu option is not available for Rectifier Mode in the case of Surface Potential surveys as such surveys are conducted on non cathodically protected pipe Step 10 Make Cane Button Functionality Choices Typically for Surface Potential surveys you would trigger voltage recordings using either the positive green handled reference electrode data probe or the negative red handled reference electrode data probe In the case where an in line survey is to be performed by two crew members one holding the positive electrode green handled data probe the other holding the negative electrode red handled data probe the choice of which push button switch to designate as the trigger for readings will depend on which data probe the crew member operating the G1 is holding If the Gl operator holds the red handled negative data probe the selection should be read flag in the Survey category and if the G1 operator is holding the green handled positive data probe the selection should be flag read In either case the crew member who is not the G1 operator could use his push but
120. n the window labeled as follows 173 Logger Info Readings and Graph By clicking on these tabs you can view information on the SDL conditions settings or you can view actual readings either in spreadsheet form or displayed graphically By clicking on the Logger Info page tab on the Driver window you can view a listing of the selections you made for your SDL application during the data logger s setup process By clicking on the Readings tab a window showing the recorded SDL data will be displayed For instance the window below shows time stamped pipe to soil data recorded at a test point by a G1 operating in the stationary data logger mode with the voltmeter reading mode being On Off Pairs DSP Mode In addition the Internal Clock time stamping mode was selected The data was collected for a period of approximately two minutes with the recording time interval being 1 second Gatherer One Driver Time Chart Data aan LoggerInfo Feadings z TETAN 14 16 41 713 i i 2036 TEE 14 16 41 713 07 30 2004 14 16 43711 1 2085 07902004 14 16 42 711 OF 30 2004 14 16 44 710 1 2070 0773972004 14 16 44 710 07 30 2004 14 16 45 708 1 2056 0743072004 1416 45 708 07 30 2004 14 16 45 707 1 2078 07 3072004 1416 46 707 07 30 2004 14 16 47 706 1 2053 07 30 2004 14 16 47 706 07 90 2004 14 16 49 705 1 2083 07 30 2004 14 16 48 705 07 30 2094 14 16 49 703 1 2084 077 3072004 14 16 49 703 OF 30 A009 14 16
121. nce electrode connects to the negative side of the voltmeter The red band and the black band cables can be pb ce connected to either one of the dual probe adapter s input terminals The GPS Antenna illustrated on the top side of the G1 in Figure 4 represents the antenna employed by the data logger s internal GPS receiver External GPS receiver units if employed would be connected to the data logger via one of the two COM Port terminals located on the bottom side of the G1 The right hand side COM Port COM 4 is recommended With either the internal unit or an external GPS unit the location of items such as flags devices geo features and anomalies can be recorded during the performance of a DCVG survey either manually by tapping on the Log GPS button on the survey screen at each critical location or automatically by pre programming the data logger as described above in Section II 3 Step 13 How to Attach Cables and Accessories to the G1 Data Logger The terminals on the top side of the data logger for the various connections described above are illustrated in Figure 5 below 80 TOP SIDE OF G1 DATA LOGGER Screen Side GPS Antenna O O Terminal 3 Terminal 2 Terminal 1 Red Banana Plug Black Banana Plug 5 Pin Data Probe Terminal Terminal Connector Terminal USED TO TEMPORARILY NOT USED CONNECTS TO DUAL CONNECT TOATS PROBE ADAPTER Figure 5 Connection terminals on top side of the G1 The 5 p
122. nclude atmospherics the Atmospherics page for that device will not be downloaded with the route ie you will not see prompts for the atmospherics on your data logger screen Finally check off the Current Interruption box if the rectifier current on your route will be switched On and Off during your survey otherwise leave this box unchecked After making your selections click on the Go button on the above window which will pull up the Data Logger Driver window Click on the Go button on the above window The Driver window shown below will appear 122 Gatherer Onc Driver Load Route Send Roule to Gatherer One 7 Help Surveys If you have akeady moved your survey dala lo the desktop computer check Use Local Folder ard select the folder where il i located Use Local Folder Refresh Connection Ready Yersin 1 585 Mrimum G athsier One Version 1 0 0 At this point the route information you selected will have been transferred to the Driver within ProActive and by clicking on the Go button on the Driver window above the route data will be sent to your G1 data logger IV 3 How to Use the G1 to Collect Data on a Scripted Route At this point the route data that you selected are now stored on your G1 data logger s memory and the following steps should be followed in order to first of all access the file containing the route data on your
123. o immediately identifying times during the recording process when readings may have deviated significantly from their steady state values Please note that the time scale on the graph is GMT Greenwich Mean Time Excel Spreadsheet Option An option exists at this point particularly if you do not plan to bring the SDL data into the Management Suite of ProActive and that is to export the data back out of the Driver in the form of spreadsheets This can be done by 175 clicking on the Export to Excel button on the Driver window and selecting a folder on your hard drive in which to save the exported data The name of this file is what you would enter in the Save As window for example Exported SDL Files By accessing your Exported SDL Files folder on your PC outside of ProActive you can view the SDL settings for your application and the data itself in spreadsheet form Step 5 Post the SDL Data to ProActive At this point in the uploading process having examined your SDL data in the Driver Section of ProActive you can decide whether or not to bring the SDL data into the Management Section of ProActive where the particular data that you are uploading can be integrated with other data in your database For instance you might want ProActive to use the SDL data in its determination of telluric compensation in association with time stamped CIS data for example When you highlight an SDL file and you
124. o advance stationing You are now ready to perform a close interval survey using the G1 data logger You are referred to our CIS Training Manual G1 Version for information and recommendations on how to actually perform a CIS using the G1 This Training Manual also provides information on the use of our Reference Electrode Data Probes and gives an overview of the physical principles associated with a CIS 53 II 2 How to Connect the G1 Data Logger with the other Test Equipment for CIS Applications The connections for CIS applications employing MCM test equipment are illustrated below in Figure 2 HOOK UPS FOR CIS Trail Wire a Hip Pack GPS Antenna Pipeline Dual Probe Adapter P Right Hand Left Hand Cane Use Cane Use Black Band Black Band Cable Cable Figure 2 Cable Connections for Hook Up of MCM s CIS Test Equipment for Negative Pipe to Soil Readings 54 As can be seen from Figure 2 a pair of canes 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 button switches 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 1 for a discussion on cane button functionality Step 9 of the Set Up Process The canes data probes are connected as shown
125. o confirming multiple rectifier synchronization for example and with regard to checking for On to Off and Off to On transition spikes To record a pipe to soil voltage waveform tap on the Save button on the above screen The screen shown below will appear G1_PLS 11 42a Save As Folder G1_Data Type Location Compact Flash m E 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 field on the above screen For ease of future retrieval when you uploaded your survey data to ProActive it is recommended that you use the same name as your SDL filename with the addition of something like Wave TP 1 to the file name This would represent the waveform data recorded at Test Point 1 Also make sure that the target folder for the file is G1_ Data as indicated above 170 You should then tap on the OK button This process will save the waveform data in the G1 data logger s CompactFlash memory for future retrieval by ProActive Finally by tapping on the Load button on the Waveform screen a list of previously saved waveform files can be viewed and these files can be opened by tapping on the file name V 4 How to Download Stationary Data Logger Data from the G1 to ProActive As SDL applications are run the recorded data are saved in the data logger s memory CompactFlash Card in separate
126. o read voltages or alternatively if an MCM data probe reference electrode having a 5 pin connector socket is being used the data probe will be connected to the 5 pin socket on the top side of the G1 which will 110 connect to the negative side of the voltmeter and the Red banana plug terminal will be used to connect to the positive side of the voltmeter To make voltmeter settings changes click on the Stop Voltmeter button which will activate settings selections If other voltmeter settings are required to make a reading you can tap on the pull down list arrow buttons in the 2 fields shown above Read Mode and Range and make your selection choices You can also change the On and the Off times associated with the current interruption cycle if necessary To have the voltmeter display a reading taken with your new settings selections click on the Start Voltmeter button When you have completed your stand alone voltmeter measurement you would click on the Stop Voltmeter button and then click on the Done button which will return you to the Survey screen By tapping on the pull down list arrow button in the Range field you can make your selection of full scale range either DC or AC and also value of Input Impedance required for the voltmeter to make a particular type of reading from the list of options By tapping on the pull down list arrow button in the Read Mode field you can select f
127. o time as new features are implemented and the serial number of the voltmeter inside of your G1 data logger which is licensed to you by MCM The screen that appears when you tap on the About button is as shown below About G1_SS G One Gatherer One 33 Scripted Survey Version 1 3 0 Voltmeter S N 3159 License Expires 11 1 06 Copyright c 2005 M C Miller Co Inc E 125 Step 2 Establish Site Survey Global Settings The Settings button will pull up the screen shown below AJ Start GF 46 2 21 Survey Settings AC Cycle Rate Moving Avg Cnt Voltmeter Digits 4 Os GPS MCM Intern coma C Use GPS Altitude _ Use Metric Show Mile Posts Show Station Numbers Apply changes to all surveys You have the opportunity here to make settings changes for the current survey that you ll be working on or you can apply the changes you make to all subsequent surveys that you ll be performing by checking the box labeled Apply changes to all surveys if it s appropriate to do so The AC Cycle Rate can be set at 60Hz or at 50Hz depending on the electricity supply frequency in your country of operation For operation in the U S this setting should be 60Hz You can change if desired the selection of Moving Average Count which is the number of sampled voltage readings sampled during both the On and the Off portions of the pipe to soil voltage waveform cycle that will
128. ode By tapping on the pull down list arrow in the GPS Type box you can make your selection Also select the COM Port you will be using for your GPS receiver COM 1 or COM 4 Again the COM 4 Port is recommended to avoid potential conflict with ActiveSync Note The COM 4 Port will be selected automatically when you select the MCM Internal GPS receiver Next enter your On Delay and your Off Delay selections by tapping on the appropriate box 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 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 the 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 Next select your current interrupter s Downbeat timing 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
129. 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 30 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 G1 data logger will record the High and Low voltages for one ON OFF cycle of the waveform Such a Current Interrupted method is known as a High Low CIS mode It should be noted that all rectifiers that might have an affect on a pipeline under survey 1 e 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 be 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 control the current switching timing on all participating rectifiers simultaneously Such GPS Receiver Current Interrupter Switches are available th
130. of your G1 In either case the window shown below will appear Note On the G1 the menu bar on the Pathfinder Controller window is located at the bottom of the screen 184 2 Pathfinder Controller GPS Settings Status Help GPS is disconnected Port com X You should then select the appropriate COM port which is typically COM 1 in the case when you are downloading settings from your PC or laptop and we recommend using the COM 1 Port on the G1 when downloading configuration settings from the G1 to your receiver Step 3 Click or tap on Settings on the above window This will pull up the window shown below 185 Pathfinder Controller GPS Eeue Status Help GPS Settings NMEA Settings Real time Settings Port 4 Settings Port B Settings OO a a Step 4 Click or tap on Port A Settings or Port B Settings This will allow you to configure either Port A or Port B for NMEA data output The specific port that yov ll configure to output NMEA data Port A or Port B will depend on which of the Pathfinder receiver units you are configuring for application with the G1 and whether or not you would like to have the G1 unit signal the receiver to perform GPS tracking only when a survey application requires GPS data as opposed to the receiver continuously tracking the GPS signals even when not required to do so by the G1 For both the XR and XRS receivers you can select to configur
131. on involving a shunt or the use of an addend to compensate for using of a reference electrode other then the standard copper sulphate electrode you would click on the Calc Settings button and enter the appropriate information for your measurement on the Calculation Settings screen Tapping on the OK button will return you to the voltmeter screen Waveform Analyzer A second application of the stand alone voltmeter is as a waveform analyzer To use this function tap on the Waveform button on the Voltmeter screen The screen shown below will appear depending on the previous settings 143 AF Start REEE ok 5 7VDC 400MOhm On Off By tapping on the Read button on the above screen you can view for example the pipe to soil voltage waveform at a test site assuming that you have the appropriate cable connections made to the G1 A typical waveform would be as shown in the screen below 5 7VDC 400MOhm On Off Ej 144 Since we set up a 700ms ON and a 300ms OFF rectifier cycle in this example the pipe to soil voltage is High for 0 7 sec and Low for 0 3 sec as evidenced by the 1 second snap shot of the voltage waveform shown in the above screen Since the voltmeter in the G1 has a finite response time 80ms on the 5 7V 400MQ setting the transitions from High to Low and Low to High are not perfect right angled steps These voltage waveforms are very u
132. on the pull down list arrow in the field labeled Range Your selection here should be made following your selection of Reading Mode see below The recommended settings for the voltmeter for rectifier current interrupted applications where pipe to soil potentials are being recorded are 5 7 Volts full scale and an input impedance value of 400MOhm These settings provide a relatively fast response time 80 ms which is important in fast cycle current interrupted applications 153 Voltmeter Reading Mode The 5 choices available to you regarding voltmeter read mode can be viewed by tapping on the pull down list arrow in the Mode box The screen will be as shown below ing ad Single Read Cycle zone tags On Off Pairs DSP mode On Off Pairs Min Max mode On Off Pairs GPS sync mode Cycle On Time mS Cycle Off Time mS Interval Internal Clock GPS Clock Schedule GPS Settings ox Ej The various reading modes are as follows Single Read With this voltmeter reading mode selected the screen shown below will appear This voltmeter mode would be selected if rectifier current interruption was not to be in effect during the SDL data collection period 154 AJ start 42 28 ok Mode SialelERst Range 5 7 Y DC 400 MOhm v Interval 1 000 Seconds v AC Cycle Rate Internal Clack GPS Clock E After selecting the Single Read mode you would enter the reco
133. onality for the left and right hand data probes in this survey type since as discussed above the push button on the right hand cane green handled cane is disabled You will initiate the recording of first the DC VG data and second the CIS data by pressing the left hand cane s push button at each measurement location down the length of the pipe You can however select the functionality you desire for the left hand cane s push button during Device measurements ie measurements at data collection points D C P s As before you can select None which will mean that pressing the push button at Devices will do nothing or you can select Save which means that the data at D C P s will be saved when you press the push button Alternatively you can tap on Device on the Survey screen and proceed to save data as described in previous sections You should then proceed through the various set up screens making your selections as before Since this is a Combined DCVG and CIS application you will only have two choices regarding Voltmeter Read Mode since the DCVG part requires current interruption and measurable differences between ON and OFF pipe to soil voltages ie measurable IR drops which rules out the Min Max mode The two options are On Off Pairs DSP mode and On Off Pairs GPS Sync mode Again the GPS Sync mode can only be selected if you are using either the MCM Internal GPS or the MCM External GPS
134. one voltmeter See Section V 3 below for information on how to use the G1 as a stand alone voltmeter Furthermore pipe to soil voltage waveforms in cases where rectifier current interruption is used can be viewed and saved by the G1 data logger by tapping on the Voltmeter button and then tapping on the Waveform button Waveforms can then be view by tapping on the Read button and they can be saved by tapping on the Save button and selecting a file name for the waveform data See Section V 3 for more details The Open button will allow you to select a previously run application The New button allows you to identify a file name for the data that will be recorded in the SDL application It is important to select a meaningful file name here as this file will be accessed by ProActive to upload the saved data The Quit button exits you from the SDL program and returns you to the home screen Q100 units or the desktop Q200 units 151 Step 4 Tap on the New button enter a filename and tap on the OK button The screen shown below will appear Location Station No MilePost PF Station Na Feet Testpoint Feet Use Metric Desc O Po Pipeline Device Type E You are being asked here to enter information regarding the type of device from which you will be collecting SDL data and the location of the device Also you are being aske
135. otential conflict with ActiveSync which uses the COM 1 Port The COM 1 and COM 4 Ports are on the bottom side of the G1 the COM 1 Port is on the left hand side and the COM 4 Port is on the right hand side looking screen side up Single Read Cycle zone tags With this voltmeter reading mode selected the screen shown below will appear Mode Single Read Cycle zone tag v Range 5 7 Y DC 400 MOhm v Interval 1 000 Seconds v AC Cycle Rate Cycle On Time mS Cycle Off Time mS Internal Clock GPS Clock E In this case the rectifier current is interrupted in a cyclic fashion however the voltmeter will only record a single reading at each recording time as opposed to two readings per cycle in the case of the On Off Pairs reading modes discussed below where one reading in the pair represents the High On voltage and the other reading represents the Low Off voltage Each single reading in this mode will be stamped with an identifying zone tag as described below A zone tag could correspond to one of the High On zones or it could correspond to one of the Low Off zones depending 156 on when each single reading is recorded relative to the pipe to soil waveform cycle In the Cycle zone tags reading mode the pipe to soil waveform cycle is divided into 8 zones and readings get tagged associated with the particular zone of the waveform cycle in which they were recorded This rea
136. pacity By tapping on the Voltmeter button the screen shown below will appear depending on previous settings 165 oF 0 0019 5 7 DC 400 MOhm v on ms EE of ms Stop Yoltmeter E The Red and the Black banana plug terminals on the top side of the G1 can be used to read voltages or alternatively if an MCM data probe reference electrode having a 5 pin connector socket is being used the data probe will be connected to the 5 pin socket on the top side of the G1 which will connect to the negative side of the voltmeter assuming that a black band data probe cable is being used and the Red banana plug terminal will be used to connect to the positive side of the voltmeter If other voltmeter settings are required to make a reading you can tap on the pull down list arrows in the 2 fields shown above and make your selection choices Note To make settings changes you first have to tap on the Stop Voltmeter button By tapping on the pull down list arrow button in the Range field you can make your selection of full scale range either DC or AC and also value of Input Impedance required for the voltmeter to make a particular type of reading By tapping on the pull down list arrow button in the Read Mode field you can select from the following voltmeter read mode choices 166 Single Read This is a single read mode where either the rectifier current is permanently ON or the rec
137. ping on the relevant buttons on the screen see above screen or you can use the keyboard to perform the same functions as follows Home key moves to prior site End key moves to next site PgUp key moves to prior prompt PgDn key moves to next prompt 132 The specific data to be collected at each site on a route is dictated by the scripts that are generated in ProActive for each site type and consequently different sites will have different sets of prompt screens Either specific types of voltages such as pipe to soil are read and recorded by the G1 data logger when the operator is prompted to set up such measurements or the operator is prompted to enter his observations regarding the condition or status of a site or the operator is prompted to enter data obtained at the site using another instrument for example soil pH data Since we have a total of 7 prompts for this example site there will be a total of 7 screens that require data starting with the Pipe to Soil screen shown below 2 44p ok Pipe to Soil S U11 Valve 4V 10 MOhm On Off Copper Sulfate Meter 1 1005 v Remaks OOOO O Prior i Current Reading 7 1 04 1 1000 On 0 8655 V Off pe The voltmeter s Range and Input Impedance settings that were scripted on the ProActive side for this prompt are indicated below the site name as is the reference electrode type to be used As can be seen from the above screen the d
138. r has to be generating position data at least every second This issue brings us to the GPS Settings selection step step 8 189 Step 8 After clicking or tapping on the OK button on the NMEA Settings window click or tap on Settings again and this time click or tap on GPS Settings This will pull up the window shown below GPS Settings Position Interval sec 1 v PDOP Mask 6 0 SNA Mask 4 0 Elevation Mask deg 15 0 v Velocity Filtering B Cancel Based on the discussion in Step 7 we require position data to be output every second and so your selection of Position Interval on the above window should be 1 second We recommend that the other settings on this window be left at their default values which are the values shown in the above window These additional settings pertain to maintaining a minimum quality of GPS data based on the receiver only processing data from satellites that are well positioned relative to one another and that are producing good signal strength Please refer to the Trimble Pathfinder manual for more details on these parameters Step 9 If you require real time corrected GPS data and you plan to employ a particular system Satellite subscriber service Beacon or WAAS you would make any necessary selections in this regard by clicking or tapping on Settings and this time clicking or tapping on Real time Settings
139. r with a view to performing a site survey Step 1 Establish a connection between your G1 data logger and your PC You must have the Microsoft ActiveSync software program installed on your PC Connect a cable between the left hand side COM Port COM 1 Port located on the bottom side of the G1 and a USB terminal or a 9 pin serial data terminal on your PC and switch on your G1 data logger Switch on your G1 by pressing the red button on the keyboard The ActiveSync window should appear and indicate that a connection has been established Select a Guest Partnership file transfer only Step 2 Open your ProActive Program and click on the Load Route button on the main menu bar This will pull up the Data Logger Load Route window as shown below ProActive s main menu bar containing the Load Route button is also shown below 120 gt M C Miller ProActive File Edt View Took Advanced Window Help amp E kz K mi 3 7i a Reports Route Mg Load Route Get Reads Surveys Find Fiter List Mor Templates Equations Data Logger Load Route Data Logger GATHERERONE Route Franks SU101 BM Technician Survey Type Anal a Status READY V Include Atmospherics J Current Interruption x Exit Step 3 Make selections on Data Logger Load Route Window From the list of Routes available to you which can be viewed by clicking on the pull down list arrow button in the Ro
140. rative that you exclusively log differentially corrected GPS position data 66 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 survey applications Log GPS at Flags If this box is ticked GPS position 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 at 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 registered Log GPS at Sidedrain Anomaly If this box is ticked GPS location data will be logged automatically when DCVG defects anomalies are marked as described in our DCVG Training Manual G1 Version 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 F ci_pis GF d 2 24 D o Ac everl Auto Log GPS Never C Differential GPS Fee NEvery Reading Use GPS for Altit Every 2 Readings Log GPS at Flags Every 5 Readings Log GPS pcp rel amp very 10 Readings
141. rding interval by tapping in the box labeled Interval and typing in your desired recording interval By tapping on the pull down list arrow in the box you can select the units for the recording interval from a choice of milliseconds seconds minutes hours and days Note The shortest recording interval for the Single Read mode is 100msec For example if you wanted potential data to be recorded every second you would select seconds and enter 1 0 In the Single Read mode you can choose to have the recorded data time stamped via the G1 s internal clock by tapping on the radial button labeled Internal Clock or you can choose to have the recorded data time stamped using the time signal from the GPS satellite system by tapping on the radial button labeled GPS Clock If you choose the latter option you would tap on the GPS Settings button By tapping on the GPS Settings button you can provide the required information regarding your GPS receiver The information that needs to be supplied here is the type of GPS unit you will be using MCM internal or MCM external units ONLY and the COM Port that you will be using for your GPS receiver The COM 4 Port will be selected automatically if you 155 select the MCM Internal GPS unit For the case of the MCM External unit you have a choice between the COM 4 Port and the COM 1 Port It is recommended that you select the COM 4 Port to avoid p
142. re are several options If this is a new survey not a continuation of a previous survey tap on New Survey The screen shown below will appear Enter New Survey Filename Step 6 Enter a filename for the Survey Note This is an important step as the filename is used to identify the survey 60 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 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 DCVG 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 DCVG survey 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
143. readings are logged by tapping on the Read button on the prompt screen and the next prompt screen in the scripted sequence will appear For our Valve Site example the next 6 prompt screens require observation data to be entered selected 136 Such selections are made by tapping on the pull down list arrow button in the description field and tapping on the Read button in each case until all prompts for this site have received a response The remaining 6 prompt screens for our Valve Site example are shown EJ Start below EJ Start Above Ground Condition Above Ground Corrosion SU11 Valve SU11 Valve Current Reading v UNASSIGNED Poor Fair Remarks Remarks Logged 7 1 04 Logged 7 1 04 Fair Average Ej Ej EJ Start Above Ground Coating Ground Level Condition SU11 Valve SU11 Valve Current Reading Coal Tar Enamel Coal Tar Enamel UNASSIGNED Cold Applied Tape Polyke Poor a Cold Applied Tape Tekrap Fair Somastic Remarks o Remarks ooo Logged 7 1 04 Logged 7 1 04 Coal Tar Enamel Fair Ej Ej 137 2 52p ok Ground Level Corrosion Ground Level Coating SU11 Valve SU11 Valve Current Reading Coal Tar Enamel Coal Tar Enamel Cold Applied Tape Polyke cod Applied Tape Tekrap Somastic remas i Remarks Logged 7 1 04 Logged 7 1 04 Average Coal Tar Enamel E E The specific prompt screens associated with the various site types valves rectifie
144. reen You can now proceed to perform the pipeline survey 200
145. reshing of the route data in the route file including the addition of the latest readings from ProActive which will be presented on the G1 reading prompt screens as the prior readings for comparison purposes to your current readings 124 The Voltmeter button can be used to select the settings of the G1 data logger s stand alone voltmeter See Section IV 5 below for information on how to use the G1 as a stand alone voltmeter 1n which case you can use the G1 to measure voltages that will typically not be logged with the site survey data unless they are entered manually The settings for the voltmeter will have been scripted on the ProActive side for each prompt on the route and during a site survey voltages measured by the voltmeter will be logged by the G1 data logger Pipe to soil voltage waveforms at a site in cases where rectifier current interruption is used can be viewed and saved by the G1 data logger by tapping on the Voltmeter button and then tapping on the Waveform button Waveforms can be viewed by tapping on the Read button and they can be saved by tapping on the Save button and selecting a file name for the waveform data See Section IV 5 for more details The About button will reveal important information about your G1 including the version number of the application program you are currently running you will receive updates of this software from time t
146. robe push button switch the Total Distance total distance from the start of the survey parameter will increase in increments of 2 5 feet or 1 meter for the metric case or whatever the Distance Per Reading value was that was entered back at Step 19 Also the Distance From Flag parameter will increase in the same increments as voltages are recorded The difference in this case however will be that when each survey flag is registered this distance parameter will begin again at zero In other words this will show the distance you are assumed by the data logger to have traveled from the last flag that you encountered and registered If you selected the Use Automatic Triggering option the screen will appear as shown below 52 GF 4 3 54 X on Undo Flag Log GPS Station 0 0 0 Trg Skip Dist From Flag o a in o a j 0 000 GPS Status Differential GPS Survey Options Help VM VS Ej In this case two additional buttons appear on the screen The Trg Off button is used to temporarily interrupt pause automatic triggering of readings which would allow you for example to maneuver around an obstacle and then restart automatic triggering after having entered an appropriate skip distance via the Geo Feat Function please see the CIS Training Manual The Trg Skip button is used to interrupt automatic triggering of readings but the data logger continues t
147. rom the following voltmeter reading mode choices ON Depolarization This is a single read mode where either the rectifier current is permanently ON or the rectifier current is OFF for the duration of the survey ON OFF In this case High and Low voltages would be determined by digital signal processing techniques ON OFF Min Max In this case a number of sampled readings would be averaged to determine both the High and the Low voltages during each cycle The specific number of readings used by the voltmeter to come up with these averaged values would be dictated by the number that you enter in the Moving Ave Samples box which appears when you select this reading mode The default number is 4 111 ON OFF GPS Sync This mode can only be selected if you are using either the Internal GPS unit or the MCM External GPS unit on the G1 AND you are using rectifier current interrupters with integrated GPS units If this is the case and you select this option the screen shown below will appear 150 Downbeat Each Minute v Cycle Start On gt Off aps port Com 4 gt GPS Type MCM Internal v Ej You are being asked here to make several selections First select the type of GPS unit you will be using currently only the MCM External and the MCM Internal GPS units can be used in the GPS Sync voltage reading mode By tapping on the pull down list arrow button in the GPS Type field you can make your s
148. rough MCM This type of current interrupted method is known as a GPS Satellite Synchronized High Low CIS mode Figure 1 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 31 GPS Satellite synchronization Test station Reference Copper wire Voltmeter interrupter logger Figure 1 A GPS satellite synchronized high low CIS mode illustration Of course a CIS can be performed with rectifiers permanently ON current permanently flowing to and along a pipeline 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 Rectifier Mode Selection By tapping on the pull down list arrow button in the Rectifier Mode field on the above screen the screen shown below will appear 32 AFG PLS GF e PEZTA Survey Type Trigger CIS v Alwa 4 D C P C None Save Read Read 7 Survey Walkin
149. rs bonds towers test points etc will result from the various scripts established on the ProActive side however the procedures outlined above for our Valve Site example would pertain to all site types IV 4 How to Download Data from a Completed Route from the G1 Data Logger to ProActive After completing a survey you can post the site survey data to ProActive where the new data will be stored and integrated with historical data To download your data you would re establish a communication connection between the G1 and your PC see Section IV 2 Step 1 and then open up ProActive on your PC By clicking on the Get Reads button on ProActive s main menu bar the window shown below will appear 138 Data Logger Get Readings E4 Data Logger GATHERERONE Route Franks SU101 7 Technician Frank X Survey Type Annual v Weather Cloudy Description June 05 Survey Start Date Say Last Date a Status READY V Include Atmospherics WV Current Interruption Ken You would then select the data logger type from which you will be downloading data in your case GATHERERONE for G1 Data Logger You would also select the Route by tapping on the pull down list arrow button in the Route field Next you would enter the type of weather condition you encountered during your route by clicking on the pull down list arrow button in the Weather field and making your selection from the l
150. ruption 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 After making your GPS Settings selections tap on the OK button which will return you to the Voltmeter Settings screen 75 Select the Cycle On Off Times The specific On and Off times for the particular current interruption waveform cycle that will be employed during your DCVG survey should be entered in the Cycle ms fields The On and the Off times should be entered in milli seconds Note After a time period corresponding to at least one waveform period On time plus Off time the DCVG voltage value displayed on the DA Meter survey screen should stabilize assuming that the data probes are making good electrical contact with the soil and a DCVG voltage recording can be triggered Consequently the rate at which DCVG voltages can be captured and saved depends critically on the interruption waveform period This is a particularly important issue in the case of large period waveforms For example if a 10 second On and a 2 second Off waveform is employed 12 second waveform period stabilization times up to 12 seconds could be possible before each DCVG voltage recording can be made In contrast the stabilization period would be only on the order of one second for a 700ms On 300ms Off interruption cycle Select Voltmeter Range and Input
151. s and a maximum of 24 recordings between survey flags to stay within the 20 max error allowance Step 20 Select whether or not you would like the recordings to be uniformly spaced between survey flags in cases where less than or greater than 20 recordings are made By tapping in the box labeled Auto Pacing Mode and inserting a tick in the box you will enable the data logger to automatically adjust the actual recordings and space them evenly over the flag spacing distance regardless of the actual number of recordings made Again enabling this selection is recommended Tap on the Next button on the above screen The screen shown below will appear 71 Technician Name Comments Description f Survey Name Compact Flash My Doc Start Date 6 7 05 10 23 06 4M E Step 21 Provide the Work Order Number for the DCVG survey By tapping in the field on the above screen labeled Work Order you can type in the work order number for the DCVG survey Step 22 Provide Your Name By tapping in the field labeled Technician Name you can type in your name or the name of your supervisor If you use your supervisor s name here you might add your own name in the Comments Section Step 23 Provide Comments By tapping in the field labeled Comments Description you can enter any comments you might have regarding the survey perhaps weather conditions soil conditions etc Also
152. s and also Pipeline Surveys such as CIS DCVG and Surface Potential Surveys In addition the Gl can collect time stamped data in a Stationary Data Logger SDL mode Your G1 data logger will arrive from MCM with the Microsoft operating system and our application programs pre installed The application programs will remain installed in RAM unless the main battery pack and its backup are allowed to fully discharge However your survey and SDL data will always be safe regardless of battery status as these data are stored on a non volatile CompactFlash card Also a copy of the application programs is maintained on the CompactFlash card and these programs are automatically re installed whenever a hard reset is performed see Section II 3 The G1 data logger is designed to work hand in hand with ProActive which is MCM s Pipeline Integrity Data Management Software Package In the case of Site Surveys Scripted Routes are downloaded onto the G1 data logger from ProActive having been created in ProActive and in turn completed site surveys are transferred back into ProActive for proactive management of the collected data The software application program required to run Scripted Site Surveys is termed the G1SS G1 Site Survey Program and in Section IV we describe in detail how to use this program on the G1 data logger to perform Scripted Site Surveys On the other hand Pipeline Surveys such as CIS and DCVG S
153. seful with regard to confirming multiple rectifier synchronization for example and with regard to checking for On to Off and Off to On transition spikes To record a pipe to soil voltage waveform tap on the Save button on the above screen The screen shown below will appear G1_PLS 11 42a Save As Folder G1_Data Type Location Compact Flash m E 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 field on the above screen For ease of future retrieval when you uploaded your survey data to ProActive it is recommended that you use the same name as your survey filename with the addition of something like Wave TS 1 to the file name This would represent the waveform data recorded at Test Site 1 145 You should then tap on the OK button This process will save the waveform data on the G1 data logger s CompactFlash memory card for future retrieval by ProActive Finally by tapping on the Load button on the Waveform screen a list of previously saved waveform files can be viewed and these files can be opened by tapping on the file name SECTION V USING THE G1 DATA LOGGER IN STATIONARY APPLICATIONS V 1 Introduction In addition to being used to perform surveys both pipeline and site surveys the G1 is also designed to be employed in stationary data logger SDL applications In such
154. shown on the above screen are the Survey File Name and the Survey Start Date and Time 72 Note Do not attempt to change the File Name indicated here as this identification will be required by the ProActive software to transfer your DCVG survey data to your PC Tap in the Next button on the above screen The screen shown below will appear Read Mode On Off Pairs DSP moc On Off Pairs DSP mode On Off Pairs GPS Sync 5 7 DC 400 MOhm on Off cy ms E Step 24 Select Voltmeter Settings and Current Interruption Cycle Voltmeter Reading Mode DCVG surveys are performed with the CP system s rectifier current switched ON and OFF in a cyclic fashion and as can be seen from the above screen there are two choices available for the data logger s voltmeter Read Mode The choices are On Off Pairs DSP mode and On Off Pairs GPS Sync Note On Off Pairs Min Max is not a option here since DCVG surveys require a measurable difference between On and Off voltages ie they require a significant IR drop 73 On Off Pairs DSP mode In this mode the voltmeter uses digital signal processing techniques to determine the flat portions for both the On and Off parts of the cycle of the rectifier current cycle AV values see DCVG Training Manual are then determined for the On and the Off portions of the cycle from which the DCVG voltage is calculated AV On minus AV Off
155. te that has been designed or scripted ahead of time A route is created in MCM s ProActive software program by selecting the specific devices that will comprise the route and setting up the order in which the devices should be tested during the route In addition the data to be gathered at each type of device along the route are scripted in the ProActive program The processes involved with scripting routes including scripting the actual device readings to be taken at each particular device are outlined in our ProActive Training Manual Once a route has been scripted the scripted data route information can be downloaded from the computer housing the ProActive software program to a data logger such as the G1 Once the scripted route data are stored in the data logger s memory the operator can follow the script of the route on the data logger to perform the site survey The operator is directed to each device site in turn on the route in a prescribed order and he is prompted to collect the appropriate data either readings or observations at each device site on the scripted route 119 IV 2 How to Load the G1 with a Scripted Route from ProActive As mentioned above in Section IV 1 scripted data route data are created by means of the ProActive software program The following process assumes that a route has been created and that your objective is to load the route data onto your G1 data logge
156. ter Right Hand Left Hand Cane Use Cane Use Red Band Black Band Cable Cable Figure 4 Cable Connections for Hook Up of MCM s DCVG Survey Test Equipment As can be seen from Figure 4 a pair of canes reference electrodes is illustrated the left hand cane RED handled cane and the right hand cane GREEN handled cane These canes which will be placed on the soil above the pipeline in either the Perpendicular or the In Line 79 configuration see DCVG Training Manual have push button switches on top of the handles so that the operator can trigger voltage recordings on his command at each of the pipeline survey measurement locations as well as at Devices and Geo Features See Section II 3 Step 10 for a discussion on cane button functionality Step 10 of the G1 s 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 G1 NOTE The left hand reference electrode red handled cane is connected to the dual probe adapter via a black band cable while the right hand reference electrode green handled cane is connected to the dual probe adapter via a red band cable This is important since the right hand reference electrode connects to the positive side of the data logger s voltmeter while the left hand refere
157. tery Gets Charged The GPS receiver unit is powered by an internal re chargeable battery and the receiver unit will only generate position data if its internal battery is charged The internal battery receives its charging current from the G1 s main battery whenever the receiver unit is switched ON However the GPS receiver unit is only switched ON automatically when GPS data are required for an application such as during a pipeline survey or when position data are required at a site during a site survey The GPS receiver is only switched ON when data are required in order to minimize the power consumption rate of the G1 s main battery In order to allow charging of the GPS receiver s internal battery outside of a survey application the receiver unit is switched ON automatically whenever the G1 unit is placed on charger see Section II 1 Consequently when the main battery of the G1 unit is being charged the GPS receiver s internal battery also gets charged When the GPS receiver unit is switched ON either because the G1 s main battery is being charged or in response to a survey application demand the GPS receiver power ON icon which is the letter G with a lightning bolt will appear in the blue band at the top of then screen In order to avoid a significant time delay in acquiring GPS data in response to a survey application demand the receiver s internal battery should be fully charged prior to embarking on a sur
158. the box labeled Metric the reading interval distance between voltage recordings and the flag internal flag spacing will be displayed in meters as opposed to feet Tap on the Next button on the above screen Step 12 Select GPS Type By tapping on the pull down list arrow button in the GPS field you can select the type of GPS unit you will be using if any from the list shown below 64 EJ G1_PLS 9 53a ok wo AC System GPS com 4 x O S Reguired Ititude Manual BOS _ Feature C idedrain Anomaly g a _ Max mw 1st reading for Tot mw E As can be seen from the above screen there are 5 choices for GPS Type None This means that a GPS receiver is not being used MCM External This means that an external MCM GPS Accessory is being used NMEA This means that an NMEA 0183 compatible GPS receiver 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 DCVG survey MCM Internal This means that the G1 s internal GPS unit will be used a Garmin Model 15L WAAS enabled receiver Select the appropriate choice by tapping on your selection When using an external GPS unit you need to select the Com Port that you ll be using on the G1 see above screen The connector terminal on the left hand side of the data logger facing the bottom side is the COM 1 Port and the terminal on the right
159. tial GPS Required Use GPS for Altitude Log GPS at Flags Log GPS DCP Feature Ej After selecting the GPS Receiver Type and the Com Port the receiver will be using choices need to be made regarding GPS Options see above screen If a GPS accessory has been selected for use with the G1 data logger for a particular CIS all or some of the functions available can be enabled box ticked A box can be ticked or unticked by tapping inside the box The options available are as follows Differential GPS Required This box should be ticked if you only want differentially corrected GPS position data to be logged by the data logger If this box is left unticked it means that you will allow the G1 data logger to log either standard GPS position data or differentially corrected GPS position data 37 Note Logging Standard GPS position data is usually better than having no data logged at all which would be the case if you checked this box and for some reason your GPS receiver was not outputting differentially corrected position data Consequently it may be preferable to leave this box unchecked unless it is imperative that you exclusively log differentially corrected GPS position data Use GPS Altitude If this box is ticked altitude data will be included with the position data whenever GPS data are logged Note Altitude data on some GPS units are not particularly accurate in CIS applications Log GPS at Flags
160. tifier current is OFF for the duration of the measurements ON OFF Pairs DSP Mode In this case two readings would be shown on the screen per rectifier current cycle The High and Low voltages or the ON and the OFF voltages would be determined by digital signal processing techniques ON OFF Min Max Mode In this case a number of sampled readings would be averaged to determine both the High and the Low voltages during each cycle The specific number of readings used by the voltmeter to come up with these averaged values would be dictated by the number that you enter in the Moving Ave Samples box which appears when you select this reading mode The default number is 4 ON OFF GPS Sync Mode This mode can only be selected if you are using either the Internal GPS unit or the MCM External GPS unit on the Gl AND you are using rectifier current interrupters with integrated GPS units If this is the case and you select this option a GPS Settings button will appear on the Settings screen and the screen shown below will appear when you tap on the GPS Settings button Alci Pus 461135 Downbeat Each Minute v Cycle Start On gt Off i GPS Port COM 4 GPS Type MCM Internal v E 167 You are being asked here to make several selections First select the type of GPS unit you will be using currently only the MCM External and the MCM Internal GPS units can be used in the GPS Sync voltage reading m
161. tifier current was switched from the ON to the 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 timing 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 Step 6 Select Recording Schedule Once you have selected the reading mode and the recording conditions for the voltmeter as discuss above in Step 5 you can set up the G1 to record data on a programmed recording schedule You can also record data manually by tapping on the Start button on the main application screen which will start the G1 recording data using your prescribed recording interval and by tapping on the Stop button you would end the recording session To record manually tap on the OK button on your reading mode selection screen once you ve made your selections which will return you to the main application screen You can then tap on the Start button
162. 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 data logger This effectively connects the canes reference electrodes to the negative side of the data logger s voltmeter since black band cables are shown in the Figure By using black band cables negative pipe to soil readings will be recorded For positive pipe to soil readings red band cables should be used In order that the data logger will record pipe to soil voltages when the canes are triggered the pipe under survey needs to be connected to the positive side of the data logger s voltmeter in the case of negative pipe to soil readings The pipe would be connected to the negative side of the voltmeter in the case of positive pipe to soil readings The pipe electrical connection is made by hooking a cable from the red banana plug terminal or the black banana plug terminal on the top side of the data logger to a banana plug terminal on the underside of a Hip Pack containing a spool of trail wire insulated copper wire The trail wire coming out of the topside of the Hip Pack is then connected to a Test Station Electrode which in turn is connected electrically to the pipe The GPS Antenna illustrated on the top side of the G1 in Figure 2 represents the antenna employed by the data logger s internal GPS receiver External GPS receiver units if employ
163. ton switch to designate the location of survey flags You can also use either cane button when recording voltages at D C P s data collection points devices to save a device reading as opposed to tapping on the save button on the screen Note When Marking SP anomalies see the Surface Potential Training Manual G1 Data logger Version the cane push button functionality becomes accept regardless of whether save or none is selected here Steplla Select Walking Direction On the Setup 1 of 5 screen you should indicate whether station numbers will be increasing or decreasing as you proceed in the survey direction by tapping on either the Increasing or Decreasing radio button in the Survey Walking Direction field 96 Step 11b Select the length units for your Soil Resistivity measurements As indicated in the Surface Potential Survey Training Manual you have the option to manually enter a value for soil resistivity measured at the location of a marked SP anomaly which will allow the software to calculate a Corrosion Factor The units Q cm or Q m for soil resistivity that will appear on the SP anomaly marking screen for your manual data entry will depend on your selection here in the Soil Resistivity Distance Units field cm or m Step llc Make selection of Metric units if required By checking off the box labeled M
164. urveys are set up on the G1 data logger itself and completed surveys are uploaded from the G1 to ProActive where the survey data can be managed inside of ProActive itself The particular application program required to run Pipeline Surveys on the G1 data logger is called the GIPLS G1 Pipe Line Survey Program and we describe the use of this program in detail in Section II Finally the G1 data logger can be used to collect time stamped data in a stationary mode The application program required to operate the G1 in the stationary mode is called the GISDL G1 Stationary Data Logger Program and we describe the use of this program in detail in Section V One of the attractive features of the G1 data logger with regard to performing both Pipeline Surveys and Scripted Site Surveys as well as being operated in the Stationary Data Logger mode is the G1 s built in internal GPS receiver Having a GPS receiver built into the unit means that critical location data can be logged during surveys and accurate time stamping of SDL data can be achieved without the need to carry an external GPS receiver along with its associated power supply and antenna The G1 data logger s internal GPS receiver is a Garmin 15L receiver unit that is WAAS enabled A WAAS enabled receiver can give you position accuracy of around meter 95 of the time and you do not have to purchase additional receiving equipment or pay service fees to utilize WAAS Wide Area Au
165. utes field select the route you will be downloading In our case the example route is named Franks SU101 Also select GATHERERONE for G1 data logger after clicking on the pull down list arrow button in the Data Logger field Next you can select the name of the technician who will be performing the route by clicking on the pull down list arrow button in the Technician field and selecting an existing name on the list 121 Next select the survey type by clicking on the pull down list arrow button in the Survey Type field and making your choice from the list presented Note This is an important selection since your choice in this category will determine which reading types will appear as prompts for particular devices based on the selections that were made on the ProActive side For instance since we have selected Annual for the Survey Type in our example above this would mean for this example route that prompts would be downloaded for all reading types for which an annual survey type was selected Prompts would not be downloaded for any reading type for which annual was not a survey types selection during the reading template set up process see the ProActive Training Manual Next check off the Include Atmospherics box if you plan to record visual observations data on your route If atmospheric types have been selected for a particular device on your route but you choose not to i
166. utton would have been active and tapping on the Help button would have revealed those instructions By tapping on the Skip button you can skip to the next prompt without logging data if for some reason you are not able to respond to the prompt You also have the opportunity to change the voltmeter settings from those established on the ProActive side scripted in ProActive for this particular prompt or for all prompts of this type on this route To do so tap on Settings which will pull up the screen shown below 134 ite 46136 Meter Settings On Time rns Off Time rms Change Current Prompt Only O Change All Prompts of This Type E The scripted settings for the voltmeter for this type of prompt pipe to soil on this route will be displayed on the above screen By tapping on the pull down list arrow buttons you can select new settings You can also indicate whether or not your changes pertain to just this prompt or to all prompts of this type by tapping in the appropriate radial button You can also enter the On and Off times in milli seconds associated with the current interruption cycle if interruption is in effect These will be global settings for the survey By tapping on the Calc Settings button you can make changes if desired to a calculation associated with the prompt or you can elect to have the predominant voltage recorded The screen shown
167. ve a correction message from the WAAS system due to the present positioning directly over the equator of the only two geo synchronous re broadcast satellites currently in the WAAS system Consequently until additional re broadcast satellites are added to the WAAS system making it equally effective in all regions of North America it may be necessary for you to use another type of GPS receiver other than the MCM GBPS receiver in order to access the correction message transmitted from either the Satellite system or the Beacon system depending on your particular location 179 For instance Trimble GPS Pathfinder receivers are commonly used to access correction messages available via commercial subscriber satellite systems such as OmniSTAR and LandStar or via a system of ground based beacons Coast Guard system If you plan to use a Trimble GPS Pathfinder receiver unit in conjunction with your G1 data logger there is a configuration process that you need to perform in order to set up the GPS unit so that appropriate data will be delivered to the G1 from the receiver MCM GPS receivers are automatically configured for use with the G1 data logger A GPS Pathfinder receiver is capable of outputting NMEA data when appropriately configured which is the required output data type for a GPS receiver to work in conjunction with the G1 There are four types of Trimble GPS Pathfinder receiver units that can be configur
168. ver to connect to the laptop or PC since ActiveSync ties up the COM port Disallow ActiveSync connection via the serial port while configuring the settings on the GPS receiver 192 Step 6 Double click on the icon labeled GPS Controller that will have been automatically created on your desktop during the software installation Next click on the drop down list button at the top of the screen and select the Setup option which will pull up the screen shown below Setup Options Real time Settings Settings Step 7 Click on the Options drop down and select Connect to GPS This will pull up the window shown below Note Typically several seconds 10 to 20 seconds are required for the connection to be made 193 wi GPS Controller E 5 63mi eo 7 Setup Options GPS Settings E x Real time Settings Step 8 Click on the GPS Settings button on the above screen which will pull up the screen shown below left hand side screen wi GPS Controller 5 63M eo x GPS Receiver Port Productivity iv DOP Type Max PDOP Min SNR Min Elevation Velocity Filter Receiver Power Output Select the port the GPS receiver is connected to wi GPS Controller 5 63m hd Setup g Cancel 4 Productivity Precision DOP Type PDOP Max PDOP 6 0 Min SNR 39 0 152 NMEA Output fle Select the port the GPS receiver is connected to Min Elevation V
169. vey The best way to accomplish this is to fully charge the G1 s main battery prior to embarking on a survey II 3 How to Reboot Reset the G1 Should the G1 data logger lock up freeze up or fail to operate the unit can be rebooted or reset in one of two ways Soft RESET To perform a Soft RESET press and hold down simultaneously both the Power button Red key on keyboard and the Orange button for about 5 seconds The screen will go blank and your data logger will perform a soft RESET When you use Soft RESET you do not lose the Operating System s registry the G1 s application software programs or your survey or SDL data As mentioned above your survey or SDL data are actually stored on a non volatile CompactFlash memory card Hard RESET To perform a Hard RESET press and hold down simultaneously the following 3 keys for about 5 seconds The Power button Red key on keyboard the Orange button and the White button Note A Hard RESET should be used as an emergency procedure only When you perform a Hard RESET you will lose the Operating System s registry and the G1 s application programs Your survey or SDL data however will be safe as these data are stored on a non volatile CompactFlash card After performing a hard reset or in the event that all battery power is allowed to fully discharge the application programs can be automatically re installed from a copy of the programs saved on the Compact
170. vey 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 21 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 7 Tap once on the OK button The screen shown below will appear HR PLS GF q 3 38 Survey Type ies e v Rectifier Mode Cycle ON OFF hd Cane Buttons Allowed D C P Survey None Left Right Survey Walking Direction Increasing Decreasing C DCVG Sidedrains in CIS Surveys C Use Automatic Triggering C Use Metric Ej Step 8 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 on the pull down list arrow button in the Survey Type field as shown below 22 GF d sai Trigger CIS Y Continuous CIS Trigger CIS DCYG Cane BulpcyG cIs D C P Surface Potential ca None Left Right sav Survey Walking Direction Increasing C Decreasing _ DCVG Sidedrains in CIS Surveys C Use
171. 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 to and along the pipe 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 the magnitude of the IR drop can be determined which would just be the difference between the current ON and current OFF voltages In terms
172. y life and How to Check Battery Status The G1 data logger is equipped with a Lithium Ion rechargeable main battery pack as well as a backup battery also rechargeable Since typical battery life of the main battery pack is around 24 hours with the unit running it is recommended that the battery be recharged overnight each night when the data logger is being used on a daily basis You might also wish to carry a second battery pack for switch out It is also recommended that the data logger be put on charger when not in use so that the unit is always ready to go when needed When the battery is fully charged the charger will automatically stop supplying power to the battery so it is safe to keep the charger on It is also recommended that the unit be placed on charger when data are being downloaded to a PC following the performance of survey measurements Charging is accomplished using the AC Adapter supplied with the data logger a DC vehicle charger unit is also available The charger unit can be connected to either of the two COM Ports on the bottom side of the data logger although the right hand side port is recommended When the battery is charging the green LED on the top left side of the keypad will blink ON and OFF and when the battery is fully charged the LED will remain ON The main battery pack will fully discharge from a fully charged state in about a 3 week period with the unit switched off The status of the G1 data logg
173. your G1 AND current interrupter switches equipped with GPS units are being employed on your rectifiers In these cases with this setting voltage readings High Low readings are synchronized with the current interrupter switching timing With this voltmeter reading mode selected after tapping on the OK button the screen shown below will appear Ag ci_ris 46333 Read Mode On Off Pairs GPS Synciig Range 5 7 DC 400 MOhm v on Off cyl ns E Also in this case you would tap on the GPS Settings button which would bring up the screen shown below 48 Downbeat Each Minute v Cycle Start On gt Off GPS Port MCM Internal v GPS Type MCM Internal E You are being asked here to make several selections First select the type of GPS unit you will be using currently only the MCM External and the MCM Internal GPS units can be used in the GPS Sync voltage reading mode Next enter your On Delay and your Off Delay selections by tapping on 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

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“GATHERER ONE” DATA-LOGGER USER`S MANUAL