Calibration adjustment is made using what?

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Multiple Choice

Calibration adjustment is made using what?

Explanation:
Calibrating an instrument across its operating range requires setting both the starting point and the slope of its response. The pull/span approach is a two-point method that adjusts the zero (the output when the input is at its minimum) and the span (the change in output per unit of input) so the entire range aligns with the true values. This is why it’s the best choice: it corrects offset and gain together, ensuring accurate readings over the full scale. If you only fix zero, the span (gain) error remains and the high-end readings won’t match; if you only fix span, the zero will still be off. Temperature calibration, meanwhile, targets drift due to temperature, not the basic scale across the range.

Calibrating an instrument across its operating range requires setting both the starting point and the slope of its response. The pull/span approach is a two-point method that adjusts the zero (the output when the input is at its minimum) and the span (the change in output per unit of input) so the entire range aligns with the true values. This is why it’s the best choice: it corrects offset and gain together, ensuring accurate readings over the full scale. If you only fix zero, the span (gain) error remains and the high-end readings won’t match; if you only fix span, the zero will still be off. Temperature calibration, meanwhile, targets drift due to temperature, not the basic scale across the range.

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