To measure the accuracy of a device, instrument, system, or process relative to a known standard and to adjust it, as necessary, in order that it conform to that standard over the range of its operation.
See calibrate in Computer
To adjust or bring into balance. Scanners, CRTs and similar peripherals may require periodic adjustment. Unlike digital devices, the electronic components within these analog devices may change from their original specification. See TV calibration, color calibration and tweak.