|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. The outputs
of the devices are compared at one or more pressures, typically from the lowest to
highest readings of the DUT’s full scale range, or the range for which it is normally used.
This comparison process is performed in a chain from the highest level of fundamental
pressure realization, down to every day pressure measurement devices, to ensure pressure
measurements are accurate and comply with accepted or mandated standards.