CAPACITANCE DIAPHRAGM GAUGE AND VACCUM APPARATUS
First Claim
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1. A capacitance diaphragm gauge comprising:
- a vacuum sealed chamber including a diaphragm electrode;
a fixed electrode provided inside said vacuum sealed chamber so as to face the diaphragm electrode; and
an inclination angle sensor configured to detect an inclination angle of the capacitance diaphragm gauge.
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Abstract
A capacitance diaphragm gauge includes an inclination angle sensor which detects the inclination angle of the gauge. The pressure dependences of capacitance obtained when the capacitance diaphragm gauge is mounted on a vacuum apparatus at the first inclination angle (+90°), the second inclination angle (0°), and the third inclination angle (−90°) are stored in a storage unit in advance. A pressure measurement value is then corrected based on the inclination angle information detected by the inclination angle sensor and the capacitance-pressure characteristic data is actually measured at the first, second and third inclination angles, and stored in the gauge.
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Citations
6 Claims
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1. A capacitance diaphragm gauge comprising:
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a vacuum sealed chamber including a diaphragm electrode; a fixed electrode provided inside said vacuum sealed chamber so as to face the diaphragm electrode; and an inclination angle sensor configured to detect an inclination angle of the capacitance diaphragm gauge. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification