MultiLoop III - Tutorial 1 Running an existing model

Step 1: Start MultiLoop III 1.Double click on the MultiLoop III Icon 2.The graphic window and a splash screen will appear 3.Click on the splash screen 4.A “New Model” dialogue will appear 5.Select the coordinate system 6.Go. 1.Double click on the MultiLoop III Icon 2.The graphic window and a splash screen will appear 3.Click on the splash screen 4.A “New Model” dialogue will appear 5.Select the coordinate system 6.Go. Splash Screen MultiLoop III Graphic Window MultiLoop III Menu Bar Graphic Manipulators Pick Pan Zoom Rotate Viewing Illumination Click OK When done Select the azimuth sign convention Specify the azimuth Select the coordinate convention

.mlp files store MultiLoop models  From the File menu, select open  From the Open File dialogue, select a file  In this case, HalfPlanecoef1511.mlp is used  Go… .mlp files store MultiLoop models  From the File menu, select open  From the Open File dialogue, select a file  In this case, HalfPlanecoef1511.mlp is used  Go… Step 2: Open a.mlp file From the File Menu, Select open Click “Open” when done Select the file Navigate to recent places and up the file tree here Change the view to alternate between the hierarchy and sorted names here

Step 3: Model Opens  When the file is opened, the model is displayed  The mesh can be viewed in “mesh” or “tile” view  Keys “b”,”s” control the tile sizes  Keys “l”,”r”,”u”,”d”,”i”,”o” control the view  Arrow keys control panning  Go….  When the file is opened, the model is displayed  The mesh can be viewed in “mesh” or “tile” view  Keys “b”,”s” control the tile sizes  Keys “l”,”r”,”u”,”d”,”i”,”o” control the view  Arrow keys control panning  Go…. The mesh is shown as tiles. Tile colour variation indicates variable resistance The line is drawn & annotated here in blue Letters after the line labels refer to the coordinate Data are plotted in “stacked profile” format along the line Reference axes Transmitter loop Receiver component label of the plotted data

Step 4: Compute a response  From the Calculate menu, select Response  This starts the computation. A text output window records the progress of the calculation  Initially, the mesh is parsed. The resistive and inductive limits are found, then a time step solution in found  The profile response is then computed, and the data are plotted  Go…  From the Calculate menu, select Response  This starts the computation. A text output window records the progress of the calculation  Initially, the mesh is parsed. The resistive and inductive limits are found, then a time step solution in found  The profile response is then computed, and the data are plotted  Go… From the Calculate menu, select Response

Step 5: Calculating Text Output Window (may be the console) Messages from the geometric optimizer Inductance calculations Geometric summary of the mesh Primary field, Inductive, Resistive Limits Time Stepper Time step count Iterations per step Time per step Latest step time Rate of change in the stream potential Basis function generation

Step 6: Calculation completes A message box appears when the calculation is done. Click OK.

Step 7: Write out data  Data can be output to a Geosoft style ASCII file  Select the Exports Menu, then Write Data  A file dialogue will appear, select the file to create  There is only simulated data in this session; you will be asked whether to write out transformed data.  Answer No, Transforms will be covered later  Go….  Data can be output to a Geosoft style ASCII file  Select the Exports Menu, then Write Data  A file dialogue will appear, select the file to create  There is only simulated data in this session; you will be asked whether to write out transformed data.  Answer No, Transforms will be covered later  Go…. To export to a file, select Write Data The File Dialogue Appears Select the file name to write Select the directory Save Select yes to write the calculated data to the file. Transforms will be explained later. Transforms allow the data to be transformed before writing.

Done  An ASCII file with the data has been created.  This file can be opened with an a text editor such as TextEdit, BBEdit or WordPad  The file data can be imported into programs such as OasisMontaj and MultiLoop III  An ASCII file with the data has been created.  This file can be opened with an a text editor such as TextEdit, BBEdit or WordPad  The file data can be imported into programs such as OasisMontaj and MultiLoop III