A method for monitoring a first digital processor integrated into a sensor module of an automation technology field device with a first set of machine commands on which a first algorithm (Camp) is run in order to calculate a measured value based on supplied raw measured values, using a second digital processor integrated into a main electronic module of the field device, exhibiting the following process steps: a) Calculating verification data based on specified input data using a second test algorithm (OPCT1, OPCT2) on an external processor unit independent of the field device, wherein the second test algorithm (OPCT1, OPCT2) is divided into at least one start section (OPCT1) and one end section (OPCT2), wherein the start section (OPCT1) and the end section (OPCT2) comprise at least some of, preferably all, opcodes of the first set of machine commands, which are used when running the first algorithm (Camp) on the first digital processor; b) Saving the specified input data for calculating the verification data and the verification data calculated using the second test algorithm (OPCT1, OPCT2) in the sensor module of the field device; c) Transmitting the specified input data and verification data stored in the sensor module to the main electronic module; d) Transmitting the specified input data from the main electronic module to the sensor module when the field device is in measuring mode; e) Running the second test algorithm (OPCT1, OPCT2) on the first digital processor of the sensor module in such a way that output data is calculated based on the specified input data transmitted by the main electronic module, wherein the first algorithm (Camp) is run between the start section (OPCT1) and the end section (OPCT2) so that, after running the second test algorithm, the verification data can be used to check whether the first algorithm has been run in full; f) Providing the output data calculated by the first digital processor in the main electronic module; g) Checking the output data with the verification data made available by the sensor module using the second digital processor of the main electronic module and, in the event that the output data does not correspond to the verification data, detecting a malfunction. a) Calculating verification data based on specified input data using a second test algorithm (OPCT1, OPCT2) on an external processor unit independent of the field device, wherein the second test algorithm (OPCT1, OPCT2) is divided into at least one start section (OPCT1) and one end section (OPCT2), wherein the start section (OPCT1) and the end section (OPCT2) comprise at least some of, preferably all, opcodes of the first set of machine commands, which are used when running the first algorithm (Camp) on the first digital processor; b) Saving the specified input data for calculating the verification data and the verification data calculated using the second test algorithm (OPCT1, OPCT2) in the sensor module of the field device; c) Transmitting the specified input data and verification data stored in the sensor module to the main electronic module; d) Transmitting the specified input data from the main electronic module to the sensor module when the field device is in measuring mode; e) Running the second test algorithm (OPCT1, OPCT2) on the first digital processor of the sensor module in such a way that output data is calculated based on the specified input data transmitted by the main electronic module, wherein the first algorithm (Camp) is run between the start section (OPCT1) and the end section (OPCT2) so that, after running the second test algorithm, the verification data can be used to check whether the first algorithm has been run in full; f) Providing the output data calculated by the first digital processor in the main electronic module; g) Checking the output data with the verification data made available by the sensor module using the second digital processor of the main electronic module and, in the event that the output data does not correspond to the verification data, detecting a malfunction.