Readings on the device are dependent upon which factor?

• A. Sensor type
• B. Calibration
• C. Battery level
• D. Temperature

Answer: (B)

Readings come from converting the raw signal produced by a sensor into a meaningful value. Calibration defines that conversion: it establishes how the sensor’s output maps to the true quantity being measured, correcting for any offset, gain differences, or nonlinearities. Because of manufacturing variations, aging, and environmental influences, the same physical quantity can produce different raw signals in different devices or over time. Calibration aligns those signals with actual values, so the displayed readings are accurate and comparable.

Sensor type sets what is being measured, but the numeric value you read depends on how well the device is calibrated to translate the sensor output into a true quantity. Temperature and battery effects can cause drift or noise, but those issues are addressed through proper calibration and, if needed, compensation algorithms.