The Data Logger uses the oscilloscope channels. When the Logger is running, it takes control over the two physical oscilloscope channels and the Oscilloscope instrument state is “busy”. Similarly, when the Oscilloscope is started, the Logger is stopped. The oscilloscope sweeps are windowed and DC, AC, and DC RMS values calculated. For the True RMS value, the same acquisition is used as for the DC voltage, and the value is calculated with the formula Sqrt( sum( xi ^ 2 ) / N ). The AC RMS value is calculated with the formula Sqrt( sum( (xi - dc) ^ 2 ) / N ).
The history plot has the following components:
For each channel, the color and scaling option can be specified: auto scaling based on the extremes from the plot history or manually specified offset and range.
See Script in Common interfaces. The local variables are the elementary logger channels, which vary depending on the device.
Example functions:
See Export in Common Interfaces.