What is a key inspection criterion for dynameters?

A key inspection criterion for dynameters is that the face should not be cracked and must be properly calibrated. The face of a dynameter is crucial for accurate readings because it displays the measurements that operators rely on to assess performance. A cracked face can obscure visibility and lead to misinterpretation of the data, while proper calibration is vital for ensuring that the readings reflect true values. An uncalibrated dynameter can result in incorrect assessments and potentially compromise safety or quality standards.

Although elements such as the integrity of the casing or the condition of the wires are important for the overall functionality and safety of the equipment, they are secondary to the necessity of having a clear, accurate display and proper calibration for reliable measurements. Clear color coding is also a valuable characteristic, but it doesn't directly influence the accuracy and reliability of measurement readings to the extent that the condition of the face and its calibration do.