By the way, if you have a Raspberry Pi, you can use it for logging. See
this project. There is a SD card image with some programs pre-installed and some examples. It supports already some multimeters with GPIB (with USB adapters), with USB interfaces and serial port interfaces. It is easy to enhance, I just wrote a
Python script for my HM8012 which creates
this output (charging a 1200 F Maxwell supercap with 3 A constant current), logging the voltage exactly every 10 seconds, and which you can display with the integrated web browser on the Rasperry Pi. Or you can mount the Raspberry Pi SD card as a Windows drive over network and just open the raw CSV data. No need to swap SD cards, complicated and proprietary software or limited memory (it needs some time to fill e.g. a 64 GB SD card). It looks like this in the browser with the installed
D3js web framework for data visualization:
The diagram can be reloaded while the measurement is running. Another example with multiple curves in one diagram:
The project needs still some work, maybe an easier to use interface for standard tasks, if you don't want to write a Python script, but it is already very useful for me, and maybe for someone who wants to test the Batteriser and record some data.