Pressure is the force that is perpendicular to the surface divided by the area it is effecting. People usually use pressure gauges to get detailed figures about instruments.
Just like any process measurement device, pressure gauges need to be calibrated at regular intervals to assure they are accurate. There are many things to consider when calibrating pressure gauges. While you are calibrating pressure gauges, you should consider many tips.
"Pressure gauges are divided into different accuracy classes that specify the accuracy of the gauge as well as other attributes. Available pressure ranges are typically divided in steps with coefficients 1, 1.6, 2.5, 4, 6 continuing into the next decade (10, 16, 25, 40, 60) and so on.
The different gauge diameters (of scales) are typically 40, 50, 63, 80, 100, 115, 160 and 250 mm (1 ½, 2, 2 ½, 4, 4 ½, and 6 inches). More accurate gauges typically have a bigger diameter."
Before calibrate a device, you need to know its Accuracy classes, Pressure media, Contamination, Height difference, Leak test of piping, Adiabatic effect, Torque, Calibration / mounting position, Generating pressure, Pressurizing / exercising the gauge , Reading the pressure value (resolution), Number of calibration points, Hysteresis (direction of calibration points), Tapping the gauge, Number of calibration cycles (repeatability), Adjustment / correction, Documentation – calibration certificate, Environmental conditions, Metrological traceability and Uncertainty of calibration (TUR/TAR).
