Patent ID: 11959783
Assignee: YOKOGAWA ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 8:
9. 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.