If you have saved a logging file from the CS Setup app, you can use the HGM Charts app to review the data. The charts is a progressive web application (PWA) that is loaded through a web browser. Once loaded, the HGM Charts app can be run again without having a connection to the Internet.
You can start the app by opening the web site: charts.hgmelectronics.com. Once you are there, you’ll be presented with a screen that looks like this:
If you are on a desktop platform, you can drag and drop a log file onto the LOAD FILE button. On all devices, you can click or tap the LOAD FILE button and then browse on your local device for an HGM log file (has extension .hjl).
One the file is loaded, you will see the resulting charts, and you can use the scroll bar on the left side to move up and down among the charts. By default, one chart is created for each signal type which minimizes the number of Y axes on the right side.
Navigation and Zoom
You can make any graph bigger vertically by grabbing the divider between the graphs.
You can move ahead and back in time by moving the scrubbing slider under any chart., shown by the blue arrow below:
By grabbing either side of the scrub tool, you can widen or narrow the duration of time visible on the graph. The default is 10 seconds. In the view below, the graph has been widened to 40 seconds:
Each graph has a cursor and signal list that shows the value of each signal at the cursor position, as well as the time. You can move the cursor to any convenient location on screen where it will remain fixed. This lets you scroll the graph and review the signal values as they move through the cursor location.
In the view below, you can see that at 22.129 seconds, the Shift Mode is Auto, the Gear is 4, the Selected Gear is 4, the TCC is Off, and the Throttle Position is 41%.
Reorganizing the Graphs
When you first load a log file, all of the signals captured in the log file are shown. You can turn on and off signals shown on the charts, and re-arrange any of them by going clicking on the “Signals” button. This view shows each signal along with the divider between each graphs. You can remove or add any signal using the add and delete buttons, or move signals among the graphs by dragging the slider on the left side. Removing a divider joins two graphs together.
If you move two signals that have different types into the same chart, you will get a Y axis for each one. By default, if two signals have the same type, like % or RPM, then those signals will share a single Y axis in a chart. If you want a signal to have its own axis, you can enable this by selecting the “INDEP Y” button.
In the example below, five signals are selected and because there is no divider, only one graph is shown. There are four Y axes: one for RPM, one for vehicle speed, and one for gear and TCC.