A sample cell insertion and removal apparatus for an analysis instrument, including a horizontally sliding frame; a sample cell carriage movably mounted to the sliding frame, the sample cell carriage including an area to hold a sample cell; wherein upon sliding into and out of the instrument, the sample cell carriage is moved horizontally and vertically into and out of an analysis position. In the event that the reducing agent is to be supplied, the exhaust gas treatment device is heated with the heater until a first threshold temperature is reached, if a first temperature lies below the first threshold temperature. Identification means are provided for identifying a field being touched based on the force signals, and generating means are provided for generating the input value associated with the field being touched. In addition, the algorithm and method allows for periodic information to be sent to quality control assurance personnel for generation of reports and information by such personnel.