Gx Time Chart Recorder Application User`s Manual
Contents
1. Range 5 7 DC 400 MOhm Rate 1 000 Sec Mode Single Status Stopped Quit Close Start Settings More SAD iE r5 The setup settings made for the above example were as follows Single Read mode for the voltmeter with a voltmeter Range of 5 7V Also the recording interval was set at 1 second Note When a recording schedule is programmed the Start button on the main application screen needs to be tapped in order to activate the program Start time wait should be indicated in the Status field under the graph which means that the software is waiting for your programmed Start time to begin the data logging process Each logged voltage value is displayed in succession in the Logged field on the above screen in addition to being displayed on the graph Note Within a given run new files are created each time the logging process is stop and re started whether it s done manually or via a programmed recording schedule Each of the files will have the same filename as the original filename with 7 appended to the filename for each successive file created where would be 2 3 4 etc Page 23 of 37 Also a new file is created having the same name as the original file together with an appropriate appendage when the number of logged readings exceeds 64 000 Section 3 How to Use the Gx as a Stand Alone Voltmeter amp Waveprint Generator The Gx data lo2. Page 4 of 37 Section 2 How to Setup the Gx to Record Data at a Fixed Location Step 1 Double tap on the Gx SDL icon on the Gx desktop The screen shown below will be diplayed Gx SDL Name Meter Logged Range Rate Mode Status Stopped new open Je EST EDT Additional menu options can be viewed by tapping on the More button on the above screen which will display the screen shown below Page 5 of 37 Voltmeter Edit Data GPS Data About Gx SDL scat Jf Pa Ee 5 About The About button will reveal important information about your Gx including the version number of the application program you are currently running and the serial number of the voltmeter inside of your Gx data logger Voltmeter The Voltmeter button provides access to the stand along voltmeter and the waveprint generator please see Section 3 for details New The New button allows a new application a new run to be setup see Step 2 below Open The Open button allows a previous run to be selected This would be an option for example if data were to be collected as part of a series of tests and an association with an original run was required A new file is created when the Open option is selected however the new file will have the same filename as the original with 7 appended where would be 2 3 4 etc depending on how many times a file is selected via the
3. ood Sec On Time mS 700 Off Time m5 soo Timing Mode e Internal Clock O GPS Clock AC co Hz i217 B B 207 pw Moving Average Samples The default value for Moving Average Samples is 4 In this case 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 readings would be used to compute an average value for the Maximum Max voltage reading during each ON portion of the waveform Different values can be entered for this parameter in order to try to optimize the On Off readings depending on the nature of the interference occurring x With the On Off Pairs Min Max voltmeter reading mode the logged values are representative of the On and Off values associated with the waveform period immediately proceeding the end of each recording interval Note The recording interval should not be shorter than the waveform period On Off Pairs GPS Sync With this voltmeter reading mode selected the screen shown below will be displayed depending on previous settings Page 17 of 37 Settings Mode onjort Pairs GPS sy nterval ood Sec Range 5 7 vDC 400 MOhm On Time mS 700 Off Time m5 soo Timing Mode AC co Hz Internal Clock 8 GPs Clock sD T ELI This voltmeter reading mode can only be selected if you are using the MCM Internal GPS receiver Internal MCM A
4. Open option Page 6 of 37 Quit The Quit button closes the Gx SDL application Step 2 Tap on the New button to create a file in which recorded data will be stored The screen shown below will be displayed Create File Enter New Filename Ce SET LESET Enter a filename and tap on the OK button The screen shown below will be displayed depending on previous settings Page 7 of 37 Site Info Pipeline Location pro saine 9 Device Testpoint A Desc Use Metric Cancel lE BD igor es am Step 3 Establish test location information Location By tapping on the menu button in the right hand field you can select either Station Number Feet or Milepost as the units for the location or Station Number Meters and Kilometer post if the Use Metric box is checked The numerical value and its style entered into the left hand field will depend on your selection of units in the right hand field Pipeline If the test location involves a connection to a pipeline you can enter the name of the pipeline in the Pipeline field Device By tapping on the menu button in the Device field you can select the type of device at which you will be collecting data from the device type options menu Description Text can be entered if desired in the Desc field in order to provide more information on the test site location o
5. Read mode selected single readings are logged and each logged reading is representative of the voltage present at the end of each recording interval The current can be interrupted or it can be Always On or Always Off Single Read Cycle zone tags With this voltmeter reading mode selected the screen shown below will be displayed depending on previous settings Settings Mode Single Read Cycle al nterval 1 000 Sec Range 5 7 vDC 400 MOhm On Time mS 700 OFF Time m5 500 Timing Mode AC eo Hz O Internal Clock GPS Clock 20 B em Note that the GPS Clock option is automatically selected for this voltmeter reading mode as GPS timing is a requirement 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 On and Off values per cycle in the case of the On Off Pairs reading modes discussed below 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 On zones or it could correspond to one of the Off zones depending on when each single reading is recorded relative to the pipe to soil waveform cycle Page 12 of 37 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
6. and you select this option a GPS Settings button will appear on the Settings screen and the screen shown below will be displayed when you tap on the GPS Settings button depending on previous settings GPS Sync Settings GPS Port com E On Delay 150 ms GPS Type Mem Internal OFF Delay fiso Downbeat Each Minute x Cycle Start On gt Off fe Se AE 2 16 pm You are being asked here to make several selections First make sure that MCM Internal is selected as the GPS Receiver Type On Delay and Off Delay 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 Page 26 of 37 For instance you might determine using the Waveprint Generator see below that there is significant spiking in the pipe to soil waveform following On to Off and Off to On transitions In this case you could select Off Delay and On Delay times to correspond to the times required for steady state On and Off voltages to be attained Downbeat By tapping on the menu button in the Downbeat field you can select the downbeat schedule associated with the particular current interrupters being used The three options are Each Minute Each Hour and Midnight For example if Each Minute is applicable to your interrupters and you select this option for the Downbeat schedule you are indicating to the data l
7. the waveform cycle in which they were recorded This reading 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 the shortest recording interval is 100ms To make your GPS settings selections tap on the GPS Settings button The screen shown below will be displayed depending on previous settings GPS Sync Settings 3 GPS Port com 4 On Delay fiso m5 GP5 Type Mem Internal Off Delay 150 Downbeat Each Minute Cycle Start On gt Off Seal coo You are being asked here to make several selections First make sure that MCM Internal is selected as the GPS Type Page 13 of 37 On Delay and Off Delay 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
8. will be displayed in the Start and the Stop Date fields Page 21 of 37 Should a recording schedule be required on the current date the time at which the recording is to start and the time at which the recording is to stop should be entered in the fields labeled Daily Start Time and Daily Stop respectively You can highlight a field hour minute second or AM PM and then either tap on the up down arrows to change the value or you can use the keyboard to change the values As can be seen from the above screen you can also program the start date the day the recordings will begin and the stop date the day the recordings will end You can highlight a field day month or year and then either tap on the up down arrows to change the value or you can use the keyboard to change the values You can also select to skip recording data on certain days of the week in a multi day recording process by checking off the appropriate check boxes associated with the day or days you d like to skip in the Skip Days field To save your programmed recording schedule tap on the OK button on the Schedule screen which will return you to the Settings screen By tapping on the OK button on the Settings screen the main application screen Gx SDL screen will be displayed as indicated below depending on the settings selected Page 22 of 37 Gx SDL Name tsu Meter 0 0024V Logged
9. 08 nz 3n 2nn4 14 174 77 Page 36 of 37 L Gatherer One Driver Time Chart Data Download Logger Info Readings Graph Bal a ala gt 285 Men On Off Excel Spreadsheet Option An option exists at this point particularly if you do not plan to post the logger data to the ProActive database which is to export the data to Excel This can be done by 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 Step 7 Post the Logger Data to the ProActive Database Having examined your logger data in the Driver section of ProActive you can decide whether or not to post the data to the ProActive database Page 37 of 37 To post the data to the ProActive database you would retrieve the Time Chart Post window that ll be sitting behind the Gx Driver window and you would use this window to target a particular test site device in the ProActive database tree This would be the test site at which you recorded the logger data Data Logger Get Time Chart Data Time Chart Post Pipeline Series Station tt 0 00 Site type v Matching Site 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 int
10. ND current interrupter switches equipped with GPS receivers are being employed on your rectifiers x 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 reading mode the shortest recording interval is the period of the waveform cycle which in our case is second Also in this case you would tap on the GPS Settings button which would bring up the screen shown below Page 18 of 37 GPS Sync Settings Ba GPS Port com E 7 On Delay fiso mS GPS Type Mem Internal Off Delay fiso oe Downbeat Each Minute Cycle Start On Off 839 1 B Ea You are being asked here to make several selections First make sure that MCM Internal is selected as the GPS Receiver Type On Delay and Off Delay 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 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 please see Section 3 In this case you could select Off Delay and On Delay times to correspond to the times required for steady state On and Off voltages to
11. Page 1 of 37 Gx TIME CHART RECORDER APPLICATION Catalog SFT133 USER S MANUAL IMIGMILLER co M C Miller Co Inc 11640 U S Highway 1 Sebastian FL 32958 Page 2 of 37 Section 1 Section 2 Section 3 Section 4 CONTENTS Page Inttoduoettom sedato de et ea fo eel 3 How to Setup the Gx to Record Data at a Fixed Location 4 How to Use the Gx as a Stand Alone Voltmeter and Waveprint Generator oco eie toptene veri erii das 23 How to Copy Data logger Files to your PC 4 1 Introduction 4 2 How to Connect the Gx to your PC 4 3 The Manual Approach ccccceeneeeeeneeeeees 31 4 4 Using the Driver in the ProActive Application 32 Page 3 of 37 Section 1 Introduction In the Gx Time Chart Recorder application voltages are logged as a function of time at a fixed location and the voltage data are time stamped The voltage data are time stamped using either the data logger s internal clock or the GPS clock The clock option or options available for time stamping depends on the reading mode selected for the voltmeter For instance either the internal clock or the GPS clock can be used to time stamp voltage data with the Single Read voltmeter reading mode selected only the internal clock can be used with the On Off Pairs D S P and the On Off Pairs Min Max voltmeter reading modes selected and finally only the GPS clock can be used with the On Off Pairs GPS Sync an
12. al being 1 second Page 35 of 37 lil Gatherer One Driver Time Chart Data ze panels Readings Graph On votsoe OF Tine m Oi chooe Corners BIERENS 14 16 41 713 07 30 2004 14 16 43 711 2 07 30 2004 14 16 44 710 3 07 30 2004 14 16 45 708 4 07 30 2004 14 16 46 707 5 07 30 2004 14 16 47 706 amp 07 30 2004 14 16 48 705 07 30 2004 14 16 49 703 8 07 30 2004 14 16 50 703 3 07 30 2004 14 16 51 701 10 07 30 2004 14 16 52 700 07 30 2004 14 16 53 699 07 30 2004 14 16 54 698 13 07 30 2004 14 16 55 697 14 07 30 2004 14 16 56 696 15 07 30 2004 14 16 57 695 16 07 30 2004 14 16 58 713 07 30 2004 14 16 59 712 18 07 30 2004 14 17 00 711 19 07 30 2004 14 17 01 710 20 07 30 2004 14 17 02 709 07 30 2004 14 17 03 708 nz 3n 2nn4 14 17 N4 7NF By tapping on the Graph page tab on the Driver window the data are displayed in graphical form as illustrated in the window shown below 07 30 2004 14 16 41 713 07 30 2004 14 16 43 711 07 30 2004 14 16 44 710 07 30 2004 14 16 45 708 07 30 2004 14 16 46 707 07 30 2004 14 16 47 706 07 30 2004 14 16 48 705 07 30 2004 14 16 49 703 07 30 2004 14 16 50 703 07 30 2004 14 16 51 701 07 30 2004 14 16 52 700 07 30 2004 14 16 53 699 07 30 2004 14 16 54 698 07 30 2004 14 16 55 697 07 30 2004 14 16 56 696 07 30 2004 14 16 57 695 07 30 2004 14 16 58 713 07 30 2004 14 16 59 712 07 30 2004 14 17 00 711 07 30 2004 14 17 01 710 07 30 2004 14 17 02 709 07 30 2004 14 17 03 7
13. be attained Downbeat By tapping on the menu button in the Downbeat field you can select the downbeat schedule associated with the particular current interrupters being used The three options are Each Minute Each Hour and Midnight Page 19 of 37 For example if Each Minute is applicable to your interrupters and you select this option for the Downbeat schedule you are indicating to the data logger software that at the top of each minute there will be an On to Off transition the rectifier current will switch from On to Off at the top of each minute This would mean in this example that the software would only have to count back to the top of the last previous minute to have a timing reference Cycle Start Finally if your interruption cycle starts with the current in the ON state the first transition is from ON to OFF check off the box labeled Start Cycle un check this box if the opposite is true With the On Off Pairs GPS Sync voltmeter reading mode current interruption is required and both On and Off readings are logged The logged values are representative of the On and Off values associated with the waveform period immediately proceeding the end of each recording interval However in this case the On and Off values are obtained at prescribed times on the waveform based on your On Delay and Off Delay values as opposed to the software using digital processing techniques to determine the On and Off valu
14. d the Single Read Cycle Zone Tag voltmeter reading modes selected please see Section 2 for more details on the various voltmeter reading mode options Typically time stamped structure to electrolyte data collected over a period of time are used to examine the impact of stray current on a structure Telluric current pick up and discharge from a buried pipeline is an example of stray current affecting a structure Other examples include current induced by DC railway and DC welding systems A particular consequence of such stray current is its affect on DC close interval potential surveys CIPS or CIS conducted on buried pipelines since pipe to soil voltages can be significantly affected by stray current that s present in the soil during a survey Steps can be taken however to correct for such effects by setting up data loggers at test stations that bracket a pipe section under survey in order to collect time stamped pipe to soil voltages as similarly time stamped data are being collected on a close interval potential survey By doing so CIPS data can be compensated in applications such as ProActive for any spurious effects due to stray current Consequently one of the principal uses of the Gx Time Chart Recorder application is to provide data that can be used to correct CIPS data should correction be required i e should non steady state voltages be detected at fixed locations in the vicinity of a pipe section under test
15. ed having the same name as the original file together with an appropriate appendage when the number of logged readings exceeds 64 000 Step 6 Examine the Time Chart Data Prior to Posting the Data to the ProActive Database You will have actually completed the process of copying a logger data file to a local folder on your PC by this point using the Driver in ProActive However before exiting the Driver it is recommended that you examine your data prior to posting the data to the ProActive database Page 34 of 37 To examine the recorded data via the Driver click on the Driver window which will be sitting behind the Time Chart Post window see Step 7 below for information on using the Time Chart Post window to post the data to the ProActive database The Driver window will again be shown but in this case there will be a selection of page tabs labeled as follows Logger Info Readings and Graph By clicking on the Logger Info page tab you can view your setup selections see Section 2 By clicking on the Readings tab you can view your time stamped logger data As an example the window shown below displays date and time stamped pipe to soil data recorded at a test station using the On Off Pairs DSP voltmeter reading mode hence the two readings On and Off values displayed The data were collected for a period of approximately two minutes with the recording time interv
16. es Note The recording interval should not be shorter than the waveform period Range By tapping on the menu button in the Range field you can make your selection of range for the voltmeter together with associated input impedance value A variety of Range Input Impedance combinations are available depending on the type and magnitude of voltage to be recorded Note Since all DC channels Ranges on the Gx data logger have a fast response time 80ms they are all suitable for fast cycle interruption applications Page 20 of 37 Schedule You can setup the Gx data logger to record data on a programmed recording schedule or you can record data by manually starting and stopping the recording process To record manually tap on the OK button on the Settings screen once you ve made your settings selections which will return you to the main application screen You can then tap on the Start button on the main application screen which will start the Gx recording data using your prescribed recording interval and by tapping on the Stop button you would end the recording session To setup a programmed recording schedule tap on the Schedule button on the Settings screen The Schedule screen shown below will be displayed depending on the current date Schedule Start sr z200 EE Stop Date 8 2 2010 Daily Start Time 12 00 00 AM Daily Stop 12 00 00 AM PHL E The current date
17. gger can be used as a stand alone voltmeter amp waveprint generator in situations where such applications may be warranted in association with the Time Chart Recorder Gx_SDL application For example at test stations on a pipeline where you are planning on recording pipe to soil data as a function of time you might want to confirm that all of the rectifiers having an affect on the section of pipe under examination are being interrupted in a synchronized fashion and that transition spiking is present or not with a view to making a decision regarding which voltmeter reading mode to select see Section 2 for information on the various voltmeter reading modes The stand alone voltmeter is accessed by tapping on the Voltmeter button on the main application screen tap on the More button to reveal the Voltmeter button 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 capacity By tapping on the Voltmeter button the screen shown below will be displayed depending on previous settings Page 24 of 37 Voltmeter Single 0 0045 Range 5 7 DC 400 MOhm Read Mode Single Read 29817 B MB 1155 AM Read Mode Voltmeter reading mode selections are made by tapping on the menu button in the Read Mode field on the above screen Single Read In thi
18. o 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 associate the logger data with a particular test site device in your ProActive database tree 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 test site device from your database tree into the Matching Site field With the test site properly identified you would click on the Save Readings button on the above window which will post the time chart data to the database in association with the targeted test site You can then view the time chart data in ProActive by opening the Details Form for the targeted test site and clicking on the Time Chart page tab
19. ogger software that at the top of each minute there will be an On to Off transition the rectifier current will switch from On to Off at the top of each minute This would mean in this example that the software would only have to count back to the top of the last previous minute to have a timing reference Cycle Start Finally if your interruption cycle starts with the current in the ON state the first transition is from ON to OFF check off the box labeled Start Cycle un check this box if the opposite is true Range By tapping on the menu button in the Range field you can make your selection of range for the voltmeter together with associated input impedance value A variety of Range Input Impedance combinations are available depending on the type and magnitude of voltage to be recorded Note Since all DC channels Ranges on the Gx data logger have a fast response time 80ms they are all suitable for fast cycle interruption applications Page 27 of 37 Waveform Generator To use this function tap on the WaveForm button on the Voltmeter screen The screen shown below will be displayed depending on the previous settings 5 7 DC 400 MOhm Single gt 0 RI 127 im Read By tapping on the Read button on the above screen you can view for example the pipe to soil voltage waveform at a test station assuming that you have the appropriate cable connections made to the Gx A typical wa
20. ou do not have to concern yourself with selecting recording times for the On and Off readings for each cycle with respect to the On to Off transitions and the Off to On transitions of the waveform as the software determines appropriate locations on the waveform for you This is in contrast to the On Off Pairs GPS Sync reading mode see below With the On Off Pairs D S P voltmeter reading mode current interruption is required and both On and Off readings are logged The logged values are representative of the On and Off values associated with the waveform period immediately proceeding the end of each recording interval Representative On and Off values are determined by the software using digital processing techniques Note The recording interval should not be shorter than the waveform period On Off Pairs Min Max This voltmeter reading mode should be selected if you were using rectifier current interruption and there was considerable interference indicated on the waveform In such a case in the absence of well defined steps IR drops the software determines an average value for the maxima and an average value for the minima occurring in the waveform as being representative of the On and the Off value per cycle With this voltmeter reading mode selected an addition field Moving Average Samples will be displayed as indicated on the screen shown below Page 16 of 37 Settings Mode onjort Pairs Min M nterval
21. r on the nature of the test site Page 8 of 37 After entering location information tap on the OK button The screen shown below will be displayed depending on previous settings Settings Mode Single Read Interval 1 000 Sec Range 5 7 DC 400 MOhm x Timing Mode Internal Clock O GPS Clock AC co Hz lg gt D iof s Step 4 Make Voltmeter Reading Mode Range Clock Type and Recording Schedule setting selections AC As can be seen by tapping on the menu button in the AC field you have two choices 60Hz and 50Hz Select the electricity supply frequency for the country in which you are operating the Gx data logger 60Hz for the U S Mode The 5 options available with regard to voltmeter reading mode can be viewed by tapping on the menu button in the Mode box The options are displayed below Page 9 of 37 Timing Mode Internal Clock GPS Clock AC co Hz TEES HII T TEESECNIE As mentioned in Section 1 voltage data are time stamped using either the data logger s internal clock or the GPS clock and the clock option or options available for time stamping depends on the reading mode selected for the voltmeter Either the internal clock or the GPS clock can be used to time stamp voltage data with the Single Read voltmeter reading mode selected only the internal clock can be used with the On Off Pairs D S P and the On Off Pairs Min Max voltmeter
22. reading modes selected and finally only the GPS clock can be used with the On Off Pairs GPS Sync and the Single Read Cycle Zone Tag voltmeter reading modes selected Single Read With this voltmeter reading mode selected the screen shown below will be displayed Page 10 of 37 Settings x Mode Siae Ei ete Range 5 7 vDC 400 MOhm nterval 1 00 Sec Timing Mode Internal Clock GPS Clock AC co Hz B 1250 Pm With the Single Read mode the voltage data can be time stamped using either the Internal Clock or the GPS Clock If the GPS Clock option is selected via the GPS Clock radio button in the Timing Mode field the GPS Settings button on the above screen will be active The only GPS Settings related issue with regard to the Single Read option is making sure that the Internal MCM receiver option is selected for the GPS Type After selecting the Single Read mode you would enter the recording interval by tapping in the box labeled Interval and typing in your desired recording interval By tapping on the menu button in Interval field you can select the units for the recording interval from a choice of milliseconds seconds minutes hours and days Note The shortest recording interval is 100ms For example if you wanted voltage data to be recorded every second you would select seconds and enter 1 0 Page 11 of 37 With the Single
23. rm data will be stored saved The name of this file will be the name you type into the Name field on the above screen The target folder for the waveform file will by default be the Gx Data folder on the Flash memory folder the SystemCF folder Note Time Chart Recorder application files are also stored in the Gx Data folder You should then tap on the OK button This process will save the waveform data on the Gx data logger s Flash memory Load 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 Page 30 of 37 Section 4 How to Copy Data Logger Files to your PC 4 1 Introduction Time Chart Recorder application data are stored in independent files either single files or multiple files per run when a run is stopped and re started or when the number of logged readings exceeds 64 000 on the Flash memory of the Gx data logger and you can copy data files from the Flash memory to your PC using one of two approaches manually or via the Driver in the ProActive software program If you have the ProActive software program installed on your PC or you can bring your Gx to a PC that has ProActive installed on it you can use the ProActive program to automatically access data files on the Gx If either of these situations applies you would proceed to Section 4 4 Note The ProActi
24. s case single reading values are displayed On Off Pairs DSP Mode In this case current interruption is required and both On and Off values are displayed Representative On and Off values for each successive cycle are determined by the software using digital processing techniques On Off Pairs Min Max Mode This reading mode can be selected if there is noise on the current interruption pipe to soil waveform and there are no discernable IR drops see the Waveform Generator section below In this case a number of sampled readings would be averaged to determine both the On and the Off 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 Page 25 of 37 The displayed values represent the On and Off values associated with the pipe to soil waveform for each successive period On Off Pairs GPS Sync Mode In this case current interruption is required and both On and Off readings are displayed The On and Off values are obtained at prescribed times on the waveform as opposed to the software using digital processing techniques to determine the On and Off values This voltmeter reading mode can only be selected if you are using the Internal GPS receiver MCM Internal AND you are using GPS interrupters If this is the case
25. s follows Double click on My Computer on your PC Double click on Mobile Device Double click on SystemCF Double click on Gx Data Right click on the data file you wish to copy amp select Copy Page 32 of 37 e Paste the file into a local folder on your hard drive e Create a compressed zipped version of the file Y ou would now be in a position to send the compressed file via email for example to a recipient who has access to the ProActive software program Note Do not rename the data file prior to sending the file to the ProActive user 4 4 Using the Driver in the ProActive Software Program Step 1 Create a folder on your PC s hard drive perhaps in your My Documents folder that will be used to permanently save files copied from your data logger You might choose to name this folder something like Logger Files Step 2 Establish a connection between the Gx and your PC as outlined in Section 4 2 above Step 3 Double click on the ProActive icon on your PC s desktop screen This will open up ProActive s main menu window A window labeled Entire Database will also be seen here The suggested organization of your database is discussed in the ProActive Training Manual Step 4 Select Data Logger and then Time Charts via the Tools menu in ProActive This will open a window labeled Data Logger Get Time Chart Data By clicking on the menu button in the Da
26. ta Logger field you can select the data logger GX from which you are copying the data file The various data loggers currently supported by ProActive are offered as choices in the menu list Finally click on the Go button which will open the Gx Driver Window Page 33 of 37 Note It may take a few seconds for the Driver Window to appear Step 5 Identify the Data File to be Copied First make sure that the Logger Data option is selected in the Data Type field The Get Data logger Data from Gx field on the Gx Driver window will list all logger data files currently stored on your Gx s Flash memory card Highlight the data file you would like to be copied to your PC Also check off the box labeled Copy to Local Folder and identify the target folder s location on your hard drive in the field underneath using the browse button This is the folder that you set up previously Step 1 above in which to save the logger data files copied from your Gx Finally click on the Go button on the Gx Driver window Note Within a given run new files are created each time the logging process is stop and re started whether it s done manually or via a programmed recording schedule Each of the files will have the same filename as the original filename with _ appended to the filename for each successive file created where would be 2 3 4 etc Also a new file is creat
27. to On transitions please see Section 3 In this case you could select Off Delay and On Delay times to correspond to the times required for steady state On and Off 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 Downbeat By tapping on the menu button in the Downbeat field you can select the downbeat schedule associated with the particular current interrupters being used The three options are Each Minute Each Hour and Midnight For example if Each Minute is applicable to your interrupters and you select this option for the Downbeat schedule you are indicating to the data logger software that at the top of each minute there will be an On to Off transition the rectifier current will switch from On to Off at the top of each minute This would mean in this example that the software would only have to count back to the top of the last previous minute to have a timing reference Cycle Start Finally if your interruption cycle starts with the current in the ON state the first transition is from ON to OFF check off the box labeled Start Cycle un check this bo
28. ve program is required to actually view the data If you do not have ProActive installed on your PC and you cannot bring your Gx to a PC that has ProActive installed on it you can copy data files manually from your Gx to your PC and you can subsequently send the copied files to a recipient who is a ProActive user If this situation applies you would proceed to Section 4 3 4 0 How to Connect the Gx Data logger to your PC Gx Data loggers can be connected to a PC using the USB cable supplied with the unit Connection via the USB Cable The requirements and procedures with regard to Gx Data logger PC connectivity depend on the operating system of the PC Case 1 Windows XP or earlier PC Operating System The Microsoft ActiveSync communication program is required on the PC If not currently installed the application can be installed from the CD provided with the Gx Data logger Once installed make sure that the Allow USB Connections option is selected in the Connection Settings window of the ActiveSync application Page 31 of 37 Next connect the USB cable from the Gx Data logger to the PC and switch ON the Gx via the RED power button The connection should be automatic and you will be asked if you d like to set up a partnership or not between the Gx and the PC Answer NO to this question as the ability to transfer file data is all that is required as opposed to a synchronized partnership You can then exit the Actives
29. veform would be as shown in the screen below Page 28 of 37 Waveform 5 7 DC 400 MOhm Single 3 D fea 12 29 Pm 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 Gx has a finite response time 80ms on the 5 7V 400MQ setting for example the transitions from High to Low and Low to High are not perfect right angled steps Note the waveform shown above is not a real waveform and it is only shown for illustrative purposes These voltage waveforms are very useful with regard to confirming multiple interrupter synchronization for example and with regard to checking for On to Off and Off to On transition spikes Save To record a pipe to soil voltage waveform tap on the Save button on the above screen The screen shown below will appear Note The folders and files that ll appear on the screen will depend on the folders and files that are currently stored on the Flash memory of your particular Gx data logger Page 29 of 37 Save As 3 S ystemCF GX_Data 24625U01 2110 C9 PLS2 chuch CORR a CNT1 spi a Franks SU101 sp2 a PLS1 vB PLO905 a Name Untitled Type Waveform Files v 2 D MB 12 34 PM You are being asked here to name the file in which the wavefo
30. x if the opposite is true On Off Pairs DSP mode With this voltmeter reading mode selected the screen shown below will be displayed depending on previous settings Page 14 of 37 Settings Mode onjort Pairs DSP rm nterval ood Sec Range 5 7 vDC 400 MOhm On Time mS 700 Off Time m5 soo Timing Mode e Internal Clock O GPS Clock AC co Hz aD i 200 e Note that with this voltmeter reading mode selected the Internal Clock option is automatically selected for the Timing Mode x This voltmeter mode is an option if rectifier current interruption is to be in effect during the data collection period 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 mode the shortest recording interval is the period of the waveform cycle which in our case is 1 second In this voltmeter reading mode the software uses digital signal processing D S P to determine the voltage during the ON portion of the interruption cycle and the voltage during the OFF portion of the cycle for each successive cycle Note A measurable difference between the ON and the OFF voltage readings is required for this reading mode i e a measurable IR drop is required Page 15 of 37 Note In this reading mode y
31. ync application If the connection is not established automatically make sure that the connection option on the Gx is USB Serial which it should be by default To do so tap on the Start button on the Gx screen tap on Settings tap on Control Panel and double tap on PC Connection If USB Serial is not indicated tap on the Change Connection button and select USB Serial from the drop down menu Repeat the connection process Case 2 Windows Vista or Newer such as Windows 7 PC Operating System The Gx Data logger connects to these systems via the Mobile Device Center which replaces the Activesync program on the PC side Make sure that the USB connection option is set up via the Mobile Device Center Connect the USB cable between the Gx Data logger and the PC and switch ON the Gx The connection should be established automatically If the connection is not established automatically make sure that the connection option on the Gx is USB Serial which it should be by default To do so tap on the Start button on the Gx screen tap on Settings tap on Control Panel and double tap on PC Connection If USB Serial is not indicated tap on the Change Connection button and select USB Serial from the drop down menu Repeat the connection process 4 3 The Manual Approach Once you have established a connection between the Gx Data logger and your PC see Section 4 2 above proceed a
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