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1. To check, adjust, or determine by comparison with a standard (the graduations of a quantitative measuring instrument): calibrate a thermometer.
a. To make corrections in; adjust: calibrated the polling procedures to ensure objectivity.
b. To adjust (a display setting) so that recorded images are accurately reproduced: calibrated the tint on the computer monitor.
3. To determine the caliber of (a tube).
Pressure calibration is the comparison of the output of a device used to measure pressure with that of another pressure measurement device, or pressure measurement standard. This usually involves plumbing the device under test (DUT) to the standard device and generating a common pressure in the measurement circuit.