DEVELOPMENT OF METHOD FOR DETERMINATION OF PRESSURE BALANCE PISTON FALL RATE

摘要

This paper describes internal method for determination of pressure balance piston fall rate using simple camera-based optical system with laboratory developed software. Measurements were carried out on three standard piston/cylinder units in Croatian National Pressure Laboratory (LPM) using gas and oil as transmitting medium. Measurement equipment, procedure and fall rate results for three set of measurements are given as well as evaluation of measurement uncertainty. Results were compared with other relevant measurements.