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Model CA 6549 Megohmmeter
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©2000 Chauvin Arnoux
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CHAPTER 1: Using DataViewer with Instruments ...........................................................................................................................4 1.1 Connecting to an Instrument ................................................................................................................................................4 CHAPTER 2: Model CA 6549 Megohmmeter.......................................................................................................................................6 2.1 Model CA 6549 Megohmmeter Control Panel Dialog Box ...................................................................................................6 2.2 Configuring the Model CA 6549 Megohmmeter ...................................................................................................................7 2.3 Running a Megohmmeter Test ...........................................................................................................................................11 2.4 Saving Received Measurements........................................................................................................................................11 2.5 Downloading Recorded Data..............................................................................................................................................12 CHAPTER 3: Megohmmeter Templates ............................................................................................................................................14 3.1 Megohmmeter Summary Report Template ........................................................................................................................14 3.2 Continuity Test Report Template........................................................................................................................................16 3.3 Resistance Test Report Template ......................................................................................................................................17 3.4 Megohmmeter CA 6549 Summary Report Template .........................................................................................................17
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CHAPTER 1: Using DataViewer® with Instruments As stated previously, DataViewer® performs two main tasks, one of which is the analysis and display of recorded data. The other is instrument configuration and control. Control of an instrument is performed via the control panel dialog box.
1.1
Connecting to an Instrument
At this point, return to the Quick Start dialog box either by selecting Quick Start from the File menu, or by restarting DataViewer®. Next, select the Open Instrument Control Panel button. At this point the Connection dialog box will be displayed (see figure 1).
Figure 1 The Connection dialog box allows you to specify the communication port and data transfer rate to be used during this session. Select the communication port from the Communication Port drop down list. Then select the data transfer rate from the Communication Rate drop down list. Once the port and data rate has been specified, click on the Start button. Click the Cancel button if you decide not to establish a connection at this time. When the OK button is selected the Select Instrument dialog box will be display (see figure 2 below).
Figure 2 The Select Instrument dialog box is used to identify an attached instrument. When first displayed it attempts to automatically identify the instrument. If it is able to identify the attached instrument (using the previously specified communication parameters) it will automatically close and proceed with the appropriate operation. While displayed the Select Instrument dialog box will continuously try to identify the attached instrument. Cycling between all know instrument types. The dialog box will remain displayed until the attached instrument is identified or until the OK button or Cancel button is selected. If the Select Instrument dialog box is unable to identify the attached instrument it will remain displayed, in which case you must manually select the desired instrument.
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At this point the Control Panel specific to the attached instrument should be displayed. Next proceed to the section corresponding to the instrument you will be using DataViewer® to communicate with.
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CHAPTER 2: Model CA 6549 Megohmmeter If you have been following this tutorial in the presented order then you have come to this point after establishing a connection with a Model CA 6549 Megohmmeter. If this is not the case then return to the chapter titled Using DataViewer® with Instruments to establish a connection with the instrument.
2.1
Model CA 6549 Megohmmeter Control Panel Dialog Box
The Megohmmeter Control Panel dialog box allows you to remotely run measurement tests, configure the megohmmeter and downloaded stored test results. Selecting Control Panel from the main Instrument menu and following a series of dialog boxes can initiate the process of displaying this dialog box. Figure 3 illustrates the Model CA 6549 Megohmmeter Control Panel dialog box.
Figure 3 This dialog box consists of the following items: • Test Operation: radio list that allows you to select the type of remote test to perform. • Control buttons: this is a list of buttons that are used to initiate various operations. The following is a list of the available buttons. • Start: begins a remote test for the selected operation. Once a test starts the text in this button changes to Stop. Selecting the button when Stop is displayed will stop a running test. • Clear: clears the local measurement buffer used to display status values and graph trend. • Save: enabled when measurement data received from the instrument is being maintained. Selecting the Save button allows you to save the current measurement values to a database that can be used to create a report. • Configure: displays the Megohmmeter Setup dialog box. This dialog box allows you to change various settings stored in the instrument. • Download: initiates the transfer of test measurements stored in the attached instrument. • Status window: below the Test Operation radio list is the Status window. This window displays a list of the most received set of measurements received from the instrument. • Trend window: to the right of the control buttons is the Trend window. This window contains the trend graph of the resistance measurement received from the instrument since the current test was started.
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2.2
Configuring the Model CA 6549 Megohmmeter
The Model CA 6549 Megohmmeter Setup dialog box allows you to remotely configure the instrument. The process of displaying this dialog box can be initiated by selecting Configure Instrument from the main Instrument menu or by selecting the Configure button on the Megohmmeter CA 6549 Control Panel dialog box. This dialog consists of three pages. The following figure illustrates the first page of the Megohmmeter Setup dialog box
Figure 4 This dialog box consists of the following items: • Test run time: specifies how long a timed test measurement is to run. • Sample interval: specifies the time between storage samples for a test run. st • 1 PI time: specifies the time (from the start of the test) for the first PI resistance value to be captured. The value captured at this time interval is used in the numerator for the PI calculation. nd • 2 PI time: specifies the time (from the start of the test) for the second PI resistance value to be captured. The value captured at this time interval is used in the denominator for the PI calculation. • Test Voltage group: this set of dialog controls allow you to specify the alarm type (less than or greater than) and specify the alarm threshold for each test. • Enable all test voltages: when checked allows all voltages to be used when running tests. • Maximum voltage: specifies the maximum voltage to be allowed when running tests. When all test voltages are not enabled the megohmmeter will not generate voltages above this level. You can disable this function (thus enabling all test voltages) by placing a check in the Enable all test voltages check box. • Date Format: specifies the format to be used by the instrument when reporting dates. • Buzzer: specifies if the instrument’s buzzer is to be enabled (ON) or disabled (OFF). • Auto Power OFF: specifies if the auto power down of the instrument is to be enabled or disabled. • Disturbance voltage limitation: defines the maximum allowable peak value of voltage present at the input of the instrument at which the measurement can be started. This value is expressed as a percentage of the nominal measurement DC voltage. e.g. if 1000V range is selected and the setting of the disturbance voltage is 3% the maximum peak disturbance voltage allowed is Vdist = 0.03 * 1000 - 30Vpk
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The following figure illustrates the second page of the megohmmeter Setup dialog box
This page allows you to specify up to three variable voltage and their associated alarm conditions.
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The following figure illustrates the third page of the megohmmeter Setup dialog box
This page allows you to specify up to three voltage ramps and their associated step voltages. Each ramp has a corresponding sample interval.
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The following figure illustrates the fourth page of the megohmmeter Setup dialog box
This page allows you to specify temperature related options within the megohmmeter. In addition to the previously mentioned fields each page of this dialog contains the following control buttons: • Close: closes the dialog box. The configuration is not written to the instrument when the dialog is closed. You must select the Write button before closing the dialog to update the instrument with any changes you make. • Save: writes the current configuration to a disk file. • Load: reads a configuration previously stored in a disk file. • Write: sends the configuration settings of the dialog to the attached instrument. • Read: obtains the configuration from the attached instrument and updates the dialog with these settings. • Defaults: resets the dialog fields to their default value. • Set Clock: sets the instrument’s date and time to a date and time of your choosing. When this button is selected the Date/Time dialog is displayed to allow you to verify and possibly change the date and time that the instrument’s clock will be set to. • Clear Memory: erases all test measurement data currently stored in the instrument. When this button is selected you will be asked to verify that the operation should proceed. • Download: transfers test measurement data stored in the instrument to the computer. This measurement data is then saved into a database of your choosing. Once the instrument configuration has been defined, select the Write button. The configuration will be transferred to the instrument and the dialog will close returning you to the Control Panel (if that is where you opened the dialog from). If you decide not to send the configuration to the instrument, select the Close button and the dialog box will close without updating the instrument. Selecting the Read button will cause DataViewer® to read the configuration in the attached instrument. When the Configure option is selected from the control panel, the Configure Instrument dialog is automatically initialized to the configuration of the attached instrument. Although, if you modify the channels and later decide to reset them or the Configure dialog was opened from the Instrument menu, selecting the Read button will reset the settings to that contained in the attached instrument. Selecting the Download button allows you to download recorded data currently stored in the instrument. For more information about the download operation refer to the selection on Saving Received Measurements. Selecting the Save button allows you to save the currently specified configuration to disk under a file name and location of your choosing. The Load button allows you to retrieve a previously saved configuration from disk. To save the current configuration to disk 1.
Select the Save button. The Save As dialog box will be displayed.
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Specify the name of the file by typing it into the File name field or by selecting one from the displayed list. You can also select an alternate directory by traversing the displayed directory tree.
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Once the file name and directory have been specified, select the Save button. At this point the configuration will be saved in the specified directory under the specified file name. If you decide not to save the configuration, select the Cancel button.
To recall a previously saved configuration from disk 1.
Select the Load button. The Open dialog box will be displayed.
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Specify the name of the file by typing it into the File name field or by selecting one from the displayed list. You can also locate configuration files in alternate directories by traversing the displayed directory tree.
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Once the file name and directory have been specified, select the Open button. At this point, the configuration will be read from disk and the Configure Instrument dialog reset accordingly. If you decide not to load the configuration, select the Cancel button.
2.3
Running a Megohmmeter Test
With the instrument connected to the computer and the Megohmmeter Control Panel dialog box open, connect the test leads of the instrument to a device to be tested. Refer to the instrument User’s Guide for information about connecting the test leads. Select a test operation by clicking on one of the Test Operation radio buttons. Then begin the test by selecting the Start button. Note: If you select a variable or ramp voltage test you must also select the index (1, 2 or 3) of the desired voltage(s). The Megohmmeter Transfer dialog box will be displayed. This dialog box sends the commands to the attached instrument instructing it to begin the selected operation. While a test is running the Start button will become the Stop button. This button has a dual purpose the function being determined by the current run state of the instrument (provided that state was set from the control panel). Pressing the Stop (originally Start) button will terminate the running test. While a test is running the Clear, Save, Configure and Download buttons are disabled. As the test progresses test status and measurement values will be displayed in the control panel’s status window. In addition a trend graph will be displayed after 10 seconds provided your running one of the meg-ohm tests. Each point on the graph represents a 5-second interval. The trace requires 2 points before the line can be drawn. This is why it takes 10 seconds before the trend graph is displayed. The test will automatically terminate after the test run time has elapsed. The run time is specified in the instrument’s configuration. After the test has terminated (automatically or through manual selection of the Stop button) the Save button will be enabled. The Save button is enabled whenever the dialog box contains test measurements that can be saved.
2.4
Saving Received Measurements
Real-time measurement data received from an instrument can be saved directly into a recording session database. This differs from the process of downloading and saving recorded data, in that the measurements are stored directly in the Control Panel and not via the instruments recording memory. Measurement data is stored by selecting the Save button in the Megohmmeter CA 6549 Control Panel dialog box. This dialog button is disabled when the dialog contains no measurement data. The transfer of real-time measurement data occurs once a test has been started via the Start button of the control panel. The Save button will be enabled when the test is stopped (pressing the Start button again) or when the test automatically terminates (concludes the test duration). Save the real-time measurements by selecting the Save button in the control panel. When the Save button is selected, a dialog box will be displayed asking for the name of the database to save the measurement data into (see figure 5).
Figure 5 Specify the name of the database file by typing it into the File name field or by selecting one from the displayed list. You can also select an alternate directory by traversing the displayed directory tree. If you decide not to save the measured data, select the Cancel button and the dialog box will close and you will be returned to the control panel. Select the Save button. If the specified database exists, a dialog box will be displayed asking if you wish to overwrite it. If you do not want the specified database to be overwritten, select the No button. You can then start over and specify another database name. If you want to overwrite the database file, select the Yes button.
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2.5
Downloading Recorded Data
Recorded measurements stored in the instrument are transferred to a database on the PC via the Download command. Before proceeding run one or more tests from the instruments from panel and save the results in the instruments memory. Refer to the instruments documentation on how to perform these operations. Select the Download button from either the Megohmmeter CA 6549 Control Panel or the Megohmmeter CA 6549 Setup dialog box. This begins the transfer of recorded data into the PC. The download operation can be initiated from the main Instrument menu. Once the download operation has been initiated a dialog displaying the transfer progress will be displayed (see figure 6).
Figure 6 Once the transfer is complete the Save As dialog box will be displayed. This dialog will be displayed once for each object set that has been saved in the instrument. Test results are saved in the instrument under an Object number and Test number. The Object and Test numbers are specified when the results are saved. The title of the dialog indicates the object index and test operations that will be saved into this database. Each object set is saved into separate database files. In the Save As dialog box you specify the name of the database in which to save the recorded test set data. If a database exists with the name you specify, a dialog asking if it should be overwritten will be displayed. Selecting the No button will display the Save As dialog box allowing you to specify another database name. If you select the Yes button, the database will be over written. Selecting the Cancel button in the Save As dialog box will cause the downloaded data to be discarded. Specify a database name and select the Save button. Once a database file name is specified, the Session Properties dialog box will be displayed (see figure 7).
Figure 7 This dialog box allows you to specify information about the recorded session. This information will be saved along with the recorded data. Selecting the Make Default button will save the current field values making them the default for subsequent Session Properties dialog boxes. Fill in the fields of this dialog box and select the OK button to accept the session information. At this point DataViewer will start saving each of the individual test data sets. You will be prompted to specify and/or accept the name for each test as it is saved (see figure 8).
Figure 8
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The test name dialog box will be displayed once for each test being saved. If more than one object test set has been saved in the instrument the previous process (starting with the database file name) will repeat for each of the remaining test objects. DataViewer saves each test object set into a separate database file. This allows you to give the database file a name that describes the object that was tested. Within the database each test of that object is saved under a name of your choosing. Specify or accept names for the test and select the OK button. Repeat this process for each test in the object set. If the recorded data download is initiated via the Instrument menu, you will be asked to specify the display template to be attached to the data. Select the template from the displayed list. The template will then be opened and the downloaded data displayed in the manner defined by the template. If the download is initiated via the control panel, you will be returned to the control panel dialog box.
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CHAPTER 3: Megohmmeter Templates This section provides an overview of DataViewer® templates provided for support of the Model CA 6549 Megohmmeter.
3.1
Megohmmeter Summary Report Template
The Megohmmeter Summary Report template generates a view with two or more pages. This template was designed for use with the model CA 6549 Megohmmeter. The first page contains the following frames: Trend Graph Channel Summary Channel List Trend Summary List The following illustrates the first page of this view:
Figure 9 Note: The frame descriptions are not present in the actual template. They are shown here for clarity. The last page contains the following frames: • Text Box - containing the text “Trend Summary Report”. • Session Summary - containing the name of the database used to generate the report. • Session Summary - containing operator information. • Session Summary - containing test site information. • Session Summary - containing operator comments. ® ® • OLE - containing the Chauvin Arnoux , Inc / AEMC Instruments logo.
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Figure 10 illustrates the last page of this view.
Figure 10 Note: The frame descriptions are not present in the actual template. They are shown here for clarity. The total number of pages generated by this template is dependent on the size of the generated Trend Summary List frame. The size of this frame is dependent on the number of sample points contained within the associated database. As we adjust the averaging period of the list, the size will change resulting in pages being added or removed from the report as needed. Each of these frames is customized by using the associated properties dialog box. The properties dialog box for a frame is displayed by selecting the frame, then selecting the Properties command from the Frame menu.
Channel List Frame The Channel List Frame is a child frame attached to the Graph Frame. The Channel List Frame displays a textual summary of the channel records contained in the database attached to its parent frame. You can customize the list text displayed, using the Channel List Properties dialog box. This dialog box is displayed by right-clicking on the frame and selecting Properties from the pop-up menu, or by double-clicking on the frame. Selecting an entry in the Channel List frame causes the trend graph to zoom to the time period of the selected entry. The associated channel trace will be selected with the Channel Summary and Trend Summary List frames being updated automatically to reflect the new selection.
Channel Summary Frame The Channel Summary Frame is a child frame conceived from a Trend Graph Frame. The Channel Summary Frame displays a textual summary of the channel record (trace) selected in its parent frame. You can customize the text displayed, using the Channel Summary Properties dialog box. The displayed text is obtained from the channel record selected in the parent frame. The Channel Summary Frame contains static and dynamic text. Static text is displayed as it is typed into the Channel Summary Properties dialog box. Dynamic text is generated through field substitution. The value obtained from the parent frame of the specified field is substituted for the field name. Surrounding the field name with square brackets specifies dynamic text. For example, if the DAR field of the selected exceedence trace is 1.000, placing the text [DAR] in the Channel Summary Text edit box, will result in 1.000 being displayed in its place on the page. Dynamic text substitution is useful for templates that create a view when recorded data is attached to it. The field name will reflect the name contained in the attached database (which may be different from database to database).
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3.2
Continuity Test Report Template
The Continuity Test Report template generates a view with two or more pages. The first page contains the following frames: Trend Graph Channel Summary Channel List Trend Summary List The following illustrates the first page of this view:
Refer to the previous section for an explanation for each of the frames. The following figure illustrates the last page of this view.
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3.3
Resistance Test Report Template
The Resistance Test Report template generates a view with two or more pages. The report generated from this template is identical to the Continuity Test Report with the exception of the title on the last page. The title on the last page is given as Resistance Test Report. Refer to the section on the Continuity Test Report template for a description of the layout of the frames contained in this template.
3.4
Megohmmeter CA 6549 Summary Report Template
The Megohmmeter CA 6549 Summary Report template generates a view with two or more pages. This template was designed for use with the model CA 6549 Megohmmeter. It is identical in layout to the Megohmmeter Summary Report template previously defined. The only difference being that the DD calculation is given in the channel summary frame. Refer to the section on the Megohmmeter Summary Report template for a description of the layout of the frames contained in this template.
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