How often should an XRF be calibrated?

An X-ray fluorescence (XRF) device should be calibrated every time it is powered down to ensure accurate measurements. This process is crucial because powering the device off and then back on can affect its performance. During calibration, the device is adjusted to account for any changes that may have occurred while it was inactive, ensuring that it provides reliable and accurate readings when it is used again.

Calibration before each use helps catch any drift in accuracy that may happen over time due to temperature variations, mechanical shifts, or electronic fluctuations, which can all impact measurement precision. Therefore, to maintain the integrity of the testing process and ensure results are dependable, it's essential to calibrate the XRF each time it is reactivated.

In contrast, other intervals suggested, such as daily, weekly, or every six hours, may not be necessary or practical, depending on the operational context and manufacturer guidelines. By calibrating at the time of powering the device, users minimize the risk of erroneous data in their assessments.