deadweighttesterillä

Deadweight tester is a device used for calibrating pressure measuring instruments. It operates on the principle of balancing an unknown pressure against a precisely known force. A deadweight tester typically consists of a cylinder containing a piston of a very precise area. Known masses are placed on top of the piston, and the resulting force, combined with the piston's area, generates a known pressure. This pressure is then applied to the instrument being calibrated, and any deviation from the expected reading indicates an error in the instrument.

The accuracy of a deadweight tester relies on the precision of the piston's area, the accuracy of the masses, and the measurement of local gravity. These devices are essential for ensuring the reliability and accuracy of pressure gauges, transducers, and transmitters used in various industries, including manufacturing, aerospace, and oil and gas. They are considered primary standards for pressure calibration due to their fundamental operating principle. Regular calibration of the deadweight tester itself is also crucial to maintain its accuracy.