You calibration standards are what usually dictate this frequency. However, I would still continue to have the calibration done annually, if nothing more than peace of mind that the results were as accurate as possible. Especially for Engineering R&D.
You calibration standards are what usually dictate this frequency. However, I would still continue to have the calibration done annually, if nothing more than peace of mind that the results were as accurate as possible. Especially for Engineering R&D.