发明名称 |
Method and apparatus for capacitance temperature compensation and manufacturability in a dual plate capacitive pressure transmitter |
摘要 |
A two wire transmitter responsive to a pressure differential sensor includes a fixed module and a removable module. The fixed module is adapted for connection to an analog removable module having a compensation capacitance MACDA or a digital removable module having compensation capacitance CDD. Capacitance compensation circuitry is included in the fixed module which includes a compensation capacitance CDM which is selected whereby MACDA equals CDD when the analog removable module and the digital removable module are calibrated. This provides a pressure transfer function which is more linearized and less susceptible to temperature variations. |
申请公布号 |
ZA9207996(B) |
申请公布日期 |
1994.04.18 |
申请号 |
ZA19920007996 |
申请日期 |
1992.10.16 |
申请人 |
ROSEMOUNT INC. |
发明人 |
LYLE E LOFGREN;JOHN P SCHULTE;BRIAN SEEMANN |
分类号 |
G01D5/24;G01L9/12;G01L13/06;G01R27/26;G01R27/28 |
主分类号 |
G01D5/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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