What is the term for the process of resetting an instrument's zero, span, and alarm points according to the manufacturer's specifications?

The term for the process of resetting an instrument's zero, span, and alarm points according to the manufacturer's specifications is calibration. Calibration is an essential procedure in ensuring that measuring instruments provide accurate and reliable readings over time. This process involves comparing the instrument's output with a known standard and making necessary adjustments to align it with those specifications, which often includes setting the zero point (the baseline reading), the span (the range of measurement), and any alarm points that indicate unsafe levels. Proper calibration is crucial in environments like confined spaces, where accurate readings can be critical for safety and effective decision-making. It helps ensure that the instruments respond correctly to real conditions, allowing responders to act based on precise data.