Pressure Calibration

Calibration of Pressure / Pressure is an activity undertaken to ensure that the zero, span, accuracy and linearity of a pressure instrument according to the actual pressure value (standard). Accuracy was determined by comparing instrument readings with the test pressure gauge reading standards for some points that can be done by random. Linearity is determined by giving increasing in and Decreasing pressure and see the response of the pressure instrument is whether to form a linear equation or a curve equation / polynomial. If not linear then the adjustment should be made. Zero is the value of pressure on the state of zero pressure (1 atmosphere). Span is the difference between the maximum value to minimum value. While the range is the minimum value to maximum.
There are two common types of calibration performed in the project:
1. Bench Calibration instrument that is bringing pressure to shop and do the calibration. Standard tool used is the DWT (Dead Weight Tester) is a tool that menkonvert heavy metals into the death of a pressure. Because weight is the force and the force per unit area is pressure. Besides compared berpressure DWT already dead (probably not changing) pressure instrument was also compared with the Certified Test Standard Gauge. 











2. Field Calibration of field calibration is done by injecting pressure on Hand Pump Pressure instrument with which his line is installed parallel to the Certified Test Standard Gauge. Pressure readings should be the same instrument with a reading of the Standard Gauge Test. Field calibration is generally done only to ensure that during pre-commissioning process pressure, the instrument can still work well. In addition to local readings of pre-commissioning will also need to ensure Zero, Span, Accuracy and linearity of the pressure that sent the system monitor (PLC / DCS).