System for process automation with a plurality of intelligent sensor and a method for calibrating the sensors

A system for process automation with a plurality of intelligent sensors, wherein each sensor serves for determining or monitoring a physical or chemical process variable of a medium and each sensor element has a primary side, a plug connector element and a secondary side, and a plug connector element comprising:

• a releasable plug-in connector between the two plug connector elements for energy in supply and data communication to occur:
• associated with each sensor is a Web service interface, via which the sensor is connectable to a wide area user network (WAN) or to a local area user network (LAN);
• and
• a control unit or a server, which at least provides software for generating a virtual measurement transmitter, wherein:
• communication between said virtual measurement transmitter and the sensors occurs via said Web service interface.

The method for calibrating the sensors of a system, wherein one or more of the sensors is, for maintenance, and calibration, purposes, removed from the system connected via a first network (LAN) and is connected in the laboratory with a laboratory network (LAN), comprising the steps of:

• via the Web address the corresponding sensor is addressed and an automatic conforming of the calibration data of the sensor with the data stored in the virtual measurement transmitter (VM) occurs;
• the sensors are calibrated by the user via the Web service interface;
• and
• the calibrated sensors are removed from the laboratory network and following completed calibration are integrated back into the system.