Check measurement evidence before a design decision
The idea
Compare a sensor with suitable known reference values over the range being used.
Step by step
- Compare a sensor with suitable known reference values over the range being used.
- Keep test conditions consistent and repeat measurements to examine variation.
- Investigate bias or unexplained variation before attributing small differences to the prototypes.
Example
A force sensor reads 0.4 N when no force is applied.
What is the best next step for this engineering comparison?
Answer
Check and correct the zero offset before comparing forces.
A nonzero unloaded reading suggests an offset that could affect comparisons.
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Invent a sensor comparison with a known reference and repeated readings. Explain which uncertainty could change the design choice.
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