1. A process measuring device, comprising: a first processor, which performs a measured value processing in first processing cycles with a first algorithm; and a second processor, which is responsible for coordination and/or communication tasks, wherein: additionally, said second processor, in time intervals, which are greater than the first processing cycle, reads a control data set from said first processor; and on the basis of the control data set, executes the first algorithm, in order to verify correct functioning of said first processor.