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Pressure Calibration Testing

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Pressure calibration compares the output of a pressure measurement device with another pressure measurement device, or a standard used to measure pressure. Normally this involves connecting the device under test (DUT) with a calibration standard device to generate a common pressure in the measurement circuit. The outputs of the devices are compared at one or more pressures, typically up to the full scale range of the Device Under Test (DUT), or the range for which it is normally used. This process of comparison is performed in a chain from the highest level of fundamental pressure realization, down to every day pressure measurement devices, to ensure pressure measurements are accurate and conform to accepted or mandated standards.

Pressure calibration is necessary for maintaining precision as well as accuracy when the instrument is used. The calibration procedure is likewise crucial for keeping the instrument in good order. When searching for accurate pressure reports, you should calibrate the pressure instrument from time to time. The calibration procedure is at the same time very crucial for maintaining a cost effective, safe, and healthy working environment.

Manufacturers of pressure gauges, pressure transmitters, pressure transducers, pressure switches, pressure indicators, and other pressure measurement devices use calibration standards to ensure that their products meet specification. They may also offer traceable pressure calibration with new devices, and calibration services for post-sale support. These pressure test and calibration processes require pressure reference standards ranging from basic pressure indicators to high performance piston gauges (deadweight testers), depending on the performance and accuracy of the device being tested.

Several types of electronic and mechanical systems are typically used to measure pressures ranging from -1 to 1,000 bar (25 inHg to 14,500 psi). There is wide choice of pressure ranges and pumps that can be used and are fully temperature-compensated for problem-free and accurate field use.

TEST STANDARDS:

• ASTM E2744 – 10 - Standard Test Method for Pressure Calibration of Thermal Analyzers
• ASTM D5720 - 95(2009) Standard Practice for Static Calibration of Electronic Transducer-Based Pressure Measurement Systems for Geotechnical Purposes