Field device

A field device comprising:

• a first sensor configured to measure a physical quantity and output a first measurement signal indicating a measured value;
• a second sensor configured to measure a physical quantity and output a second measurement signal indicating a measured value;
• a first converter configured to perform a predetermined first conversion process on the first measurement signal outputted from the first sensor;
• a second converter configured to perform a predetermined second conversion process on the second measurement signal outputted from the second sensor;
• and
• a processor configured to output a first output signal corresponding to the first measurement signal subjected to the first conversion process and a second output signal corresponding to the second measurement signal subjected to the second conversion process, wherein
• the processor
• starts verifying the operational soundness of the first converter and the second converter in a case in which a ratio between a signal level of the first measurement signal subjected to the first conversion process by the first converter and a signal level of the second measurement signal subjected to the second conversion process by the second converter satisfies a predetermined condition,
• outputs, while the operational soundness of the first converter is being verified, a signal corresponding to the first measurement signal subjected to the first conversion process and acquired immediately before the operational soundness of the first converter is verified, or a signal corresponding to the first measurement signal indicating a predetermined measured value of the first sensor, as the first output signal, and
• outputs, while the operational soundness of the second converter is being verified, a signal corresponding to the second measurement signal subjected to the second conversion process and acquired immediately before the operational soundness of the second converter is verified, or a signal corresponding to the second measurement signal indicating a predetermined measured value of the second sensor, as the second output signal.