The Effects of Capillary Tubing on Pressure Measurement
Publisher: Onyx Valve Co.
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Overview:
The effects of capillary tubing on the performance of pressure-sensing instruments are described in this paper. Temperature effects of capillary tubing on the measurement accuracy of pressure gauging instruments are explained, and the effects of elevation changes on gauge readings are illustrated, providing a formula for calculating the measurement changes based on elevation changes. Effects of response time lag introduced by capillary tubing in the instrument reading are explained, listing the factors that influence the delayed reaction time. The paper also includes a mathematical equation for an exact prediction of the performance of a pressure measuring system consisting of an isolator ring, capillary tube, and pressure sensing element.
| TABLE OF CONTENTS |
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| 1. | Temperature Effects | 1 |
| 2. | Elevation Effects | 1 |
| 3. | Response Time | 2 |
| 4. | Tables | |
| 4.1. | Volume of Iso Rings | 3 |
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