What is the purpose of cross-channel checks in sensor calibration and protection logic?

• A. To identify anomalies and ensure consistency across channels.
• B. To cancel data from all channels to simplify logic.
• C. To replace physical shielding with software instead.
• D. To ignore minor differences between channels.

Answer: (C)

Cross-channel checks are used to verify that multiple sensors measuring the same quantity agree with each other, so anomalies or faults can be detected during calibration and in protection logic. By comparing readings across channels, the system can spot drift, mismatches, or a failed sensor and respond appropriately, ensuring the protection logic acts only on valid data and preventing spurious trips. The idea is to use redundancy to validate measurements, not to cancel data or replace hardware with software, and not to ignore small differences; differences are checked against defined tolerances and treated as a fault when they exceed those limits.