Yes, you can find THD measurement in harmonic mode, ranging from 0% to 100%.
Usually one year, this depends on time interval.
Only USB disks with a capacity of less than 32GB and in FAT32 format can be recognized by SA2100. Please format your USB disk and plug it into SA2100 again, check whether “To USB” is
In Logger function, there is a “ParamSelect” key as Fig.1 shown:

Fig.1
If users need to log harmonics, “Uharm” and “Iharm” should be selected as Fig.2 shown:

Fig.2