The aim of the presented paper is to point out the possibilities of determination of new types of belts of the belt gear in case of a newly developed device. The developing and structural-design stage was followed by production and installation of the device. An electric motor serves as a device drive and belt gear input. The other electric motor represents a system load factor. The frequency converters diagnosed and monitored by the software intended for the purpose drive both motors. Through a simple adjustment of the designed device, diverse types and dimensions of the belts and belt pulleys can be changed. Monitoring and diagnostics of the tracked parameters was performed by the sensors fixed in the positions prescribed in advance.