The operating parameters are set using the "OTT Water Logger Operating Pro- gram" PC software. This software allows the system to be conveniently and flexibly tailored to a wide range of measurement requirements of a station. The software can be set to provide a basic or an advanced user interface. The basic user interface allows all settings to be adjusted within a single program window. In the advanced user interface, the sample interval can be controlled e.g. by means of limit events. The software also supports the execution of pumping tests.