Smart HMI + Smart Meter. Our Weintek cMT combination of cMT3151 and a Smart Meter offers a great solution for an energy demand management system. The accuracy of demand calculation is ensured by two user defined parameters: “Demand Duration” and “Demand Update Frequency”. The acquired data can be used to monitor and easily manage production demand. The cMT HMI is not only an HMI, it is also a Server which can be view and controlled by other monitoring devices or displays such as via WiFi to iPad/Android tablets or to a cMT-iV5 on the network. via “Easyaccess 2.0” and cMT Viewer.