G PHYSICS
G01 MEASURING; TESTING
G01L MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
G01L27/00 Testing or calibrating of apparatus for measuring fluid pressure
G01L27/002 Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination