In a calibration scenario where a technician is calibrating a 1000 V AC range with a maximum output of 300 V from the calibrator, what should the technician do?

In the scenario where the technician is faced with a limitation from the calibrator that can output a maximum of 300 V while needing to calibrate a 1000 V AC range, the appropriate action is to calibrate at 300 V and mark it as limited. This approach ensures that the technician acknowledges the constraints of the equipment being used, which is crucial for maintaining the integrity and reliability of the calibration process.

Calibrating at 300 V allows the technician to provide a valid calibration point that is achievable with the available equipment, ensuring that practical use of the calibrator is still respected. By marking the calibration as limited, clear documentation is provided to inform users about the constraints and potential implications of using the equipment beyond the calibrated range. This maintains transparency and ensures that those relying on the calibration understand that while a calibration point has been provided, it does not cover the specified maximum range of 1000 V.

Using a different calibrator could be considered if available, but it is not always feasible in every scenario. Ignoring the limitation and proceeding could lead to inaccuracies and compromised safety. Therefore, calibrating at the maximum output of the available calibrator while providing clear indications of its limitation is the most responsible and practical choice.