The three functions which are available are as follows :-

Pointers two data pointers represented by hands are present on the active data bank the active data bank choices are shown at the top of the graph. To move the up pointing hand the left and right arrow keys are used alternatively click the left mouse button near to the desired data point on the active data bank the pointer will jump to this point. Using the up and down arrow keys will move the downward pointing hand and pressing the right mouse button will jumps this pointer to the nearest data point. The gradient is calculated with the data between the two data pointers. Pointers are not available on the exploring file graphs.

Mouse Zoom clicking the left mouse button down on the graph starts the zoom operation. After which the mouse pointer will be followed by a rubber band box to show the area to be zoomed in on. Clicking the left mouse button again will zoom in on this area or clicking the right mouse button will cancel the zoom operation. Mouse Zoom is not available on the exploring file graphs.

Labels to add a label on to the graph position the mouse pointer in the top left area for the label to reside and click the left mouse button. A box will appear beneath the mouse pointer the text for the label can now be typed. The selected label on the graph is shown by the box around the outside of the text. Clicking the mouse on a previously entered label will select it. The label can be dragged to any position on the graph by clicking on the label and with the button still pressed move the mouse to any position on the graph. The label will be transferred to this new position the moment the button is released.

At the top of the graph is a small section devoted to label editing pressing the left and right arrow buttons will scroll through any existing entered labels. The change font button is used to change the font size and colour of the selected label double clicking on a selected label on the graph has the same effect as pressing this button. The labels will be removed from the graph whenever either a new graph type is selected or the existing graph is Restored.

Prints out the graph to the default printer. Has the same effect as selecting Print from the Graph drop down menu.

The active data bank is shown with a check mark next to the appropriate data bank menu item under the Data drop down menu and also at the top of the graph on the tool bar under the title Active data bank.

Info when selected will display information about the plotted graphs.

Label graph with info will add the filenames for each data bank to the bottom left of the graph in the corresponding colour for each data bank colour. Once added to the graph the info labels can be treated the same as normal labels.

Smooth between pointers the data between the data pointers on the active data bank will be smoothed.

Smooth bank will smooth the active data bank.

Smooth all every piece of data shown on the screen will be smoothed.

Delete data point the data point under the up pointing data pointer will be deleted from memory the data on the hard disk drive is unaffected. The graph(s) will then be re-plotted.

Delete between pointers will remove the data between the two data pointers.

Spreadsheet / Boukamp converter the analysis bank data can be converted for external use.

Note book will show the information entered into the data gathering section for the active data bank.

Save labels to file can be used to save all the labels to the computers disk drive for permanent storage.

Load labels from file will retrieve any saved labels.

Title can be used to add a heading to the graph. The title once added can be treated as a normal label.

Long ticks will toggle a tick mark on / off. If a tick mark is present then long ticks will be placed at regular intervals on the graph in order to segment the graph.

Display settings is used to change the colours and widths of the data bank lines. The font can also be changed.

Data markers the individual data points on the graph can be shown using either circles squares boxes pixels lines or triangles.

Auto all data is searched through to find the maximum and minimum scaling value after which the graph is re-drawn. Auto scale can be used to restore scaling on the graph after it has been zoomed in on.

If Manual is selected the manual scale form will be shown at the top of the form is the X axis scaling with the Y axis scaling at the bottom. Numbers can be entered into the maximum and minimum boxes. The Autoscale button will find the maximum and minimum values for either the X or Y axis as appropriate.

Invert Z axis only available to be selected on the three dimensional graphs. If on a three dimensional graph the general magnitude of data decreases with each run then the data behind the first run will not be clear to be seen. Selecting invert Z axis will toggle a tick mark on / off if a tick mark is present then the Z axis will be inverted. That is instead of the data being displayed from run number one at the front of the graph data will be displayed with run number one at the back with the run number increasing as the data nears the front of the graph.

Swap X max with X min will flip over the X axis so that the maximum value is on the left and the minimum value is on the right as with invert Z axis swapping the X max with X min can be useful to see the data on the 3D graph more clearly.

Analysis buffer : nyquist plot only

Find circle (C on keyboard) the equivalent circuit for the R(C/R) semi circle can be determined. The process of finding the equivalent circuit involves using three pointers the two data pointers on the graph and the mouse pointers. To find the equivalent circuit one of the data pointers should be positioned on the left hand side of the semi circle the other data pointer on top of the semi circle. Find circle is then selected and the mouse is moved to the right hand side of the semi circle. A rubber band circle will follow the mouse around the graph once satisfied press the left mouse button. If the right mouse button is pressed the find circle action will be cancelled. Another way to start the circle fit routine off is to click the Circle fit button on the tool bar. To select circle fit data pointers must be selected from the function tool bar. If circle fitting is to be done on a nyquist plot then it is most important to insure the aspect is correct for the X and Y axis otherwise incorrect results will be obtained. The aspect will be incorrect if the plot has been manually scaled using the mouse zoom manual scale option or if zero plot X Y was selected. To correct the aspect in these circumstances Isotropic on the X/Y axis should be selected. The aspect will also be incorrect if the analysis graph is not set to the maximum screen. An indication that the aspect is incorrect will be shown whilst doing the circle fit the rubber band circle will not be in contact with the two pointers and the mouse. The corrosion rate can be calculated using the equivalent circuit form below.

All the values on the corrosion rate form except for Icorr and the corrosion rate values can be changed. Each time a value is changed and the enter key pressed the new corrosion rate will be calculated. Print above results button will print the relevant information and the results to the connected printer. The Store results button can be used to store any calculated results this data is placed in the stored results frame and can be printed out as a complete list with the Print button. The Append results to an Excel file button can be used to store the calculated results to an excel compatible file.

Nyquist drop down menu

Frequency label data point (up pointer) when selected will take the point under the up data pointer and label below it the frequency. Once added the frequency label can be treated as a normal label.

Isotropic on X axis will take the current X scalings and scale the Y axis accordingly so that the aspect is correct.

Isotropic on Y axis uses the Y axis to rescale the X axis to keep the aspect correct. Isotropic scaling is useful if the nyquist plot has been zoomed in on with the mouse and the aspect of the X and Y axis are incorrect.