According to the specifications of the battery manufacturers, battery systems must be checked regularly. These tests must be carried out in accordance with DIN EN 60896-21. A requirement is the annual measurement and recording of the charging voltage of all cells / blocks.
In order to carry out this work without much effort, we have developed the Battery voltage meter BM-24 with USB interface.
Applying a constant voltage, data record is stored in the meter. After completion of a series of measurements, all voltage values with cell number, date and time are stored on a USB stick as a CSV file. This CSV file can be opened e.g. in Excel.
You do not need special software or hardware for further data processing.