Capable of accepting input from a wide range of sensors, many are also able to calibrate pressure equipment. Multifunction calibrators are the do-everything calibration instrument. Rugged and portable, pressure pumps serve as an excellent means to spot check the accuracy of pressure gauges, sensors, transmitters and transducers in the field for applications in which ultimate As pressure is generated, the unit under test can be directly compared to the reference With multifunction calibrators or used as standalone devices, calibration pumps include mounts for both gauges. As they rely on weight to calculate pressure, they are considered toīe primary standards and are accepted world-wide as the most accurate measurement of pressure.Ĭalibration pumps and other pressure sources provide a means for side-by-side comparison of readings from both the unit under test and a traceable reference gauge working as the standard. No other type of pressure calibration equipment can match the stability, repeatability and accuracy of deadweight testers. Is compared to the pressure shown on the unit under test and corrections can be made. Once balance has been achieved the exact pressure is determined by the amount of weight used. Under test is hooked up and the weights, which correspond to specific pressures, are added to the top of the piston assembly while a pump generates pressure from the bottom ultimately creatingĪ balance between the force made by the weights and the force made by the pressure. Types of Pressure Calibrators Deadweight Testersĭeadweight testers use known, traceable weights and a precision machined piston and cylinder assembly to check the accuracy of pressure gauges, sensors, transmitters and transducers. International standards, or certified reference materials. Establishing traceability is accomplished by a formal comparison to a standard which is directly or indirectly related to national standards (such as NIST in the USA), To improve the quality of a calibration to levels acceptable to outside organizations, it is generally desirable for the calibration and subsequent measurements to be traceable to internationally

Due to the high accuracy of primary standards, they are also used to calibrate other calibrationĮquipment, known as working standards, that-while remaining highly accurate- use measurement technology with higher levels uncertainty and which are more prone to drift. Values remove uncertainty, making primary standards the most accurate calibration tools. Primary standards achieve their high accuracy by relying upon measurement technologies that do not drift such as length, mass or time. While all standards have a known accuracy, there are some-known as primary standards- that are sufficiently accurate such that they are not calibratedīy or subordinate to other standards. Using the standard as a guide, the unit under test is adjusted until both units display the same results while under the same pressure. The second device is the standard, which has a knownĪccuracy.

The first device is the unit to be calibrated, often called the unit under test. Because accurate readings are aĬritical component of many industrial processes, a number of technologies have been developed to calibrate pressure devices.Ĭalibration is a comparison between two devices. Pressure gauges, sensors, transmitters and transducers, like all measuring tools, have a tendency to wear over time and become less accurate.

1500 psi to bar