Final answer:
Weights on a class A balance should be calibrated regularly, at least once a year, to ensure accurate measurements. In some industries, more frequent calibration may be required. Regular calibration helps maintain accuracy and reliability.
Step-by-step explanation:
Weights on a class A balance should be calibrated regularly to ensure accurate measurements. The frequency of calibration depends on several factors such as the usage, the precision required, and the manufacturer's recommendations. In general, it is recommended to calibrate the weights on a class A balance at least once a year.
In some industries where precision is critical, such as pharmaceutical or food production, the weights may need to be calibrated more frequently, such as every 3 to 6 months. It's important to follow industry standards and guidelines when determining the calibration schedule for class A balance weights.
Regular calibration helps maintain the accuracy of the balance and ensures that the measurements are reliable and consistent.