Millipore Technical Publications |
 | UG-TN001EN00 | |
Integritest Exacta Instrument Calibration GuidePurpose, Background, Calibration Logic, Equations, Methods and Results | ||
| Lit No.: | TN001EN00 | |
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| Year: | 1999 | |
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| The IT Exacta has been validated to achieve accurate diffusion flowrate, HydroCorr™ flowrate and bubblepoint test results for a full range of filters. The pressure decay based test procedures rely on the accurate determination of the pressure decay from a defined test pressure to determine the gas flowrate that is compared to the filter specification. There are two sources of error that could contribute to the accuracy and reliability of the filter test result. These are the accurate determination of the pressure decay rate and then determination of the gas volume within which the pressure decay occurs (to within 5%). The IT Exacta is equipped with two transducers and a pressure regulator that are calibrated and matched to minimize these errors and meet Millipore’s specifications. A Setra 270 pressure transducer is used to measure the pressure decay to the required accuracy and is also used during sizing. The secondary transducer, the Setra 206, is used only during the sizing procedure. It is not used to determine or interpret the pressure decay from which the flowrate or bubblepoint are determined. The pressure regulator is used to regulate the inlet pressure. Click the PDF above for the full document. | |
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