The present invention provides methods for diagnosing mental disorders. Such a sensor portion is designed for use with a corresponding measurement portion that extracts the calibration andor error information from the memory in the sensor portion. The questionnaire is accessed on a mobile device, such as a cell phone, or on a computer with network access. This cancelation extends the gain characteristics of the interconnect between the PGA’s output and the inputs of the first stage of the comparators. This invention further relates to the related kit of hydraulic accessories and to the related hydraulic system, as well as to a mixing apparatus comprising such hydraulic system. A monitoring transceiver means is adapted in use to one or more of the fieldbuses by means of two or more common mode andor differential mode signal injection andor signal detection points, which points are dispersed between the bulk power supply and the fieldbus trunk.