has part has specified output planned process assay calibration WEB:http://en.wikipedia.org/wiki/calibration A planned process with the objective to establish the relationship between data produced by a measurement device and physical qualities. This is done by using the measurement device under defined conditions, and either tuning it to adjust the measured output, or record the output and use it as a reference in future measurements. the process of using pH buffer adjust a pH meter calibration GROUP: OBI Philly workshop measurement device ready for release